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initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
#
# Makefile for musl (requires GNU make)
#
# This is how simple every makefile should be...
# No, I take that back - actually most should be less than half this size.
#
# Use config.mak to override any of the following variables.
# Do not make changes here.
#
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
srcdir = .
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
exec_prefix = /usr/local
bindir = $(exec_prefix)/bin
prefix = /usr/local/musl
includedir = $(prefix)/include
libdir = $(prefix)/lib
cleanup shared library build system to be more $HOME-local-install friendly the path for the dynamic linker is now configurable, and failure to install the symlink for it will not stop the build.
2011-06-28 01:38:11 +00:00
syslibdir = /lib
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
BASE_SRCS = $(sort $(wildcard $(srcdir)/src/*/*.c $(srcdir)/arch/$(ARCH)/src/*.c))
add support for arch-provided replacement files as .c or .S previously, replacement files provided in $(ARCH) dirs under src/ had to be .s files. in order to replace a file with C source, an empty .s file was needed there to suppress the original file, and a separate .c file was needed in arch/$(ARCH)/src/. support for .S is new and is aimed at short-term use eliminating .sub files. asm source files are still expected not to make any heavy preprocessor use, just simple conditionals on subarch. eventually most affected files may be replaced with C source files with minimal inline asm instead of asm source files.
2016-01-19 23:19:01 +00:00
BASE_OBJS = $(patsubst $(srcdir)/%,%.o,$(basename $(BASE_SRCS)))
ARCH_SRCS = $(wildcard $(srcdir)/src/*/$(ARCH)/*.[csS] $(srcdir)/src/*/$(ARCH)$(ASMSUBARCH)/*.sub)
ARCH_OBJS = $(patsubst $(srcdir)/%,%.o,$(basename $(ARCH_SRCS)))
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
REPLACED_OBJS = $(sort $(subst /$(ARCH)$(ASMSUBARCH)/,/,$(subst /$(ARCH)/,/,$(ARCH_OBJS))) $(subst /$(ARCH)$(ASMSUBARCH)/,/$(ARCH)/,$(subst /$(ARCH)/,/,$(ARCH_OBJS))))
OBJS = $(addprefix obj/, $(filter-out $(REPLACED_OBJS), $(sort $(BASE_OBJS) $(ARCH_OBJS))))
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
LOBJS = $(OBJS:.o=.lo)
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
GENH = obj/include/bits/alltypes.h
GENH_INT = obj/src/internal/version.h
IMPH = $(addprefix $(srcdir)/, src/internal/stdio_impl.h src/internal/pthread_impl.h src/internal/libc.h)
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
keep user-provided CFLAGS/LDFLAGS separate from those added by configure this way, overriding these variables on the make command line (or just re-passing the originally-passed values when invoking make) won't suppress use of the flags added by configure.
2015-11-02 21:58:14 +00:00
LDFLAGS =
LDFLAGS_AUTO =
abstract out compiler runtime library for linking libc.so this allows config.mak to override the default -lgcc for building with other compilers such as pcc/clang/etc.
2012-08-03 01:05:43 +00:00
LIBCC = -lgcc
reorganize Makefile to support "least surprise" config/make semantics the major change here is that CFLAGS is now a variable that can be changed entirely under user control, without causing essential flags to be lost. previously, "CFLAGS += ..." was valid in config.mak, but using "CFLAGS = ..." in config.mak would have badly broken the build process unless the user took care to copy the necessary flags out of the main Makefile. I have also added a distclean target that removes config.mak.
2012-05-01 23:30:03 +00:00
CPPFLAGS =
keep user-provided CFLAGS/LDFLAGS separate from those added by configure this way, overriding these variables on the make command line (or just re-passing the originally-passed values when invoking make) won't suppress use of the flags added by configure.
2015-11-02 21:58:14 +00:00
CFLAGS =
CFLAGS_AUTO = -Os -pipe
reorganize Makefile to support "least surprise" config/make semantics the major change here is that CFLAGS is now a variable that can be changed entirely under user control, without causing essential flags to be lost. previously, "CFLAGS += ..." was valid in config.mak, but using "CFLAGS = ..." in config.mak would have badly broken the build process unless the user took care to copy the necessary flags out of the main Makefile. I have also added a distclean target that removes config.mak.
2012-05-01 23:30:03 +00:00
CFLAGS_C99FSE = -std=c99 -ffreestanding -nostdinc
CFLAGS_ALL = $(CFLAGS_C99FSE)
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
CFLAGS_ALL += -D_XOPEN_SOURCE=700 -I$(srcdir)/arch/$(ARCH) -Iobj/src/internal -I$(srcdir)/src/internal -Iobj/include -I$(srcdir)/include
keep user-provided CFLAGS/LDFLAGS separate from those added by configure this way, overriding these variables on the make command line (or just re-passing the originally-passed values when invoking make) won't suppress use of the flags added by configure.
2015-11-02 21:58:14 +00:00
CFLAGS_ALL += $(CPPFLAGS) $(CFLAGS_AUTO) $(CFLAGS)
reorganize Makefile to support "least surprise" config/make semantics the major change here is that CFLAGS is now a variable that can be changed entirely under user control, without causing essential flags to be lost. previously, "CFLAGS += ..." was valid in config.mak, but using "CFLAGS = ..." in config.mak would have badly broken the build process unless the user took care to copy the necessary flags out of the main Makefile. I have also added a distclean target that removes config.mak.
2012-05-01 23:30:03 +00:00
keep user-provided CFLAGS/LDFLAGS separate from those added by configure this way, overriding these variables on the make command line (or just re-passing the originally-passed values when invoking make) won't suppress use of the flags added by configure.
2015-11-02 21:58:14 +00:00
LDFLAGS_ALL = $(LDFLAGS_AUTO) $(LDFLAGS)
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
AR = $(CROSS_COMPILE)ar
RANLIB = $(CROSS_COMPILE)ranlib
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
INSTALL = $(srcdir)/tools/install.sh
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
ARCH_INCLUDES = $(wildcard $(srcdir)/arch/$(ARCH)/bits/*.h)
INCLUDES = $(wildcard $(srcdir)/include/*.h $(srcdir)/include/*/*.h)
ALL_INCLUDES = $(sort $(INCLUDES:$(srcdir)/%=%) $(GENH:obj/%=%) $(ARCH_INCLUDES:$(srcdir)/arch/$(ARCH)/%=include/%))
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
various changes in preparation for dynamic linking support prefer using visibility=hidden for __libc internal data, rather than an accessor function, if the compiler has visibility. optimize with -O3 for PIC targets (shared library). without heavy inlining, reloading the GOT register in small functions kills performance. 20-30% size increase for a single libc.so is not a big deal, compared to comparaible size increase in every static binaries. use -Bsymbolic-functions, not -Bsymbolic. global variables are subject to COPY relocations, and thus binding their addresses in the library at link time will cause library functions to read the wrong (original) copies instead of the copies made in the main program's bss section. add entry point, _start, for dynamic linker.
2011-02-24 21:37:21 +00:00
EMPTY_LIB_NAMES = m rt pthread crypt util xnet resolv dl
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
EMPTY_LIBS = $(EMPTY_LIB_NAMES:%=lib/lib%.a)
add rcrt1 start file for fully static-linked PIE static-linked PIE files need startup code to relocate themselves, much like the dynamic linker does. rcrt1.c reuses the code in dlstart.c, stage 1 of the dynamic linker, which in turn reuses crt_arch.h, to achieve static PIE with no new code. only relative relocations are supported. existing toolchains that don't yet support static PIE directly can be repurposed by passing "-shared -Wl,-Bstatic -Wl,-Bsymbolic" instead of "-static -pie" and substituting rcrt1.o in place of crt1.o. all libraries being linked must be built as PIC/PIE; TEXTRELs are not supported at this time.
2015-05-26 07:37:41 +00:00
CRT_LIBS = lib/crt1.o lib/Scrt1.o lib/rcrt1.o lib/crti.o lib/crtn.o
reorganize Makefile to support "least surprise" config/make semantics the major change here is that CFLAGS is now a variable that can be changed entirely under user control, without causing essential flags to be lost. previously, "CFLAGS += ..." was valid in config.mak, but using "CFLAGS = ..." in config.mak would have badly broken the build process unless the user took care to copy the necessary flags out of the main Makefile. I have also added a distclean target that removes config.mak.
2012-05-01 23:30:03 +00:00
STATIC_LIBS = lib/libc.a
cleanup shared library build system to be more $HOME-local-install friendly the path for the dynamic linker is now configurable, and failure to install the symlink for it will not stop the build.
2011-06-28 01:38:11 +00:00
SHARED_LIBS = lib/libc.so
new gcc wrapper, entirely specfile based the _concept_ of this wrapper has been tested extensively, but the integration with the build/install system, and using a persistent specfile rather than one generated at build-time, have not been heavily tested and may need minor tweaks. this approach should be a lot more robust (and easier to improve) than writing a shell script that's responsible for trying to mimic gcc's logic about whether it's compiling or linking, building shared libs or executable files, etc. it's also lighter weight and should result in mildly faster builds when using the wrapper.
2012-04-22 18:32:49 +00:00
TOOL_LIBS = lib/musl-gcc.specs
reorganize Makefile to support "least surprise" config/make semantics the major change here is that CFLAGS is now a variable that can be changed entirely under user control, without causing essential flags to be lost. previously, "CFLAGS += ..." was valid in config.mak, but using "CFLAGS = ..." in config.mak would have badly broken the build process unless the user took care to copy the necessary flags out of the main Makefile. I have also added a distclean target that removes config.mak.
2012-05-01 23:30:03 +00:00
ALL_LIBS = $(CRT_LIBS) $(STATIC_LIBS) $(SHARED_LIBS) $(EMPTY_LIBS) $(TOOL_LIBS)
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
ALL_TOOLS = obj/musl-gcc
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
build: overhaul wrapper script system for multiple wrapper support this overhauls part of the build system in order to support multiple toolchain wrapper scripts, as opposed to solely the musl-gcc wrapper as before. it thereby replaces --enable-gcc-wrapper with --enable-wrapper=..., which has the options 'auto' (the default, detect whether to use wrappers), 'all' (build and install all wrappers), 'no' (don't build any) and finally the options named after the individual compiler scripts (currently only 'gcc' is available) to build and install only that wrapper. the old --enable-gcc-wrapper is removed from --help, but still available. it also modifies the wrappers to use the C compiler specified to the build system as 'inner' compiler, when applicable. as wrapper detection works by probing this compiler, it may not work with any other.
2015-06-28 21:08:19 +00:00
WRAPCC_GCC = gcc
add musl-clang, a wrapper for system clang installs musl-clang allows the user to compile musl-powered programs using their already existent clang install, without the need of a special cross compiler. it achieves this by wrapping around both the system clang install and the linker and passing them special flags to re-target musl at runtime. it does only affect invocations done through the special musl-clang wrapper script, so that the user setup remains fully intact otherwise. the clang wrapper consists of the compiler frontend wrapper script, musl-clang, and the linker wrapper script, ld.musl-clang. musl-clang makes sure clang invokes ld.musl-clang to link objects; neither script needs to be in PATH for the wrapper to work.
2015-06-28 21:08:21 +00:00
WRAPCC_CLANG = clang
build: overhaul wrapper script system for multiple wrapper support this overhauls part of the build system in order to support multiple toolchain wrapper scripts, as opposed to solely the musl-gcc wrapper as before. it thereby replaces --enable-gcc-wrapper with --enable-wrapper=..., which has the options 'auto' (the default, detect whether to use wrappers), 'all' (build and install all wrappers), 'no' (don't build any) and finally the options named after the individual compiler scripts (currently only 'gcc' is available) to build and install only that wrapper. the old --enable-gcc-wrapper is removed from --help, but still available. it also modifies the wrappers to use the C compiler specified to the build system as 'inner' compiler, when applicable. as wrapper detection works by probing this compiler, it may not work with any other.
2015-06-28 21:08:19 +00:00
add build system support for arch endian & float abi variants
2013-07-19 00:30:58 +00:00
LDSO_PATHNAME = $(syslibdir)/ld-musl-$(ARCH)$(SUBARCH).so.1
cleanup shared library build system to be more $HOME-local-install friendly the path for the dynamic linker is now configurable, and failure to install the symlink for it will not stop the build.
2011-06-28 01:38:11 +00:00
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
-include config.mak
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
ifeq ($(ARCH),)
$(error Please set ARCH in config.mak before running make.)
endif
fix a few bugs from last dynamic linking build system commit some cruft was left and DESTDIR was not being used correctly.
2011-06-28 12:27:38 +00:00
all: $(ALL_LIBS) $(ALL_TOOLS)
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
OBJ_DIRS = $(sort $(patsubst %/,%,$(dir $(ALL_LIBS) $(ALL_TOOLS) $(OBJS) $(GENH) $(GENH_INT))) $(addprefix obj/, crt crt/$(ARCH) include))
$(ALL_LIBS) $(ALL_TOOLS) $(CRT_LIBS:lib/%=obj/crt/%) $(OBJS) $(LOBJS) $(GENH) $(GENH_INT): | $(OBJ_DIRS)
$(OBJ_DIRS):
mkdir -p $@
split up installation target patch by Luca Barbato (lu_zero)
2012-08-17 23:32:24 +00:00
install: install-libs install-headers install-tools
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
clean:
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
rm -f obj/crt/*.o obj/crt/$(ARCH)/*.o
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
rm -f $(OBJS)
rm -f $(LOBJS)
avoid deleting the lib/empty file
2011-02-17 22:57:26 +00:00
rm -f $(ALL_LIBS) lib/*.[ao] lib/*.so
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
rm -f $(ALL_TOOLS)
add infrastructure to record and report the version of libc.so this is still experimental and subject to change. for git checkouts, an attempt is made to record the exact revision to aid in bug reports and debugging. no version information is recorded in the static libc.a or binaries it's linked into.
2013-12-01 22:27:25 +00:00
rm -f $(GENH) $(GENH_INT)
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
rm -f obj/include/bits/alltypes.h
preparing build system to handle ports - step 1
2011-02-15 05:33:23 +00:00
reorganize Makefile to support "least surprise" config/make semantics the major change here is that CFLAGS is now a variable that can be changed entirely under user control, without causing essential flags to be lost. previously, "CFLAGS += ..." was valid in config.mak, but using "CFLAGS = ..." in config.mak would have badly broken the build process unless the user took care to copy the necessary flags out of the main Makefile. I have also added a distclean target that removes config.mak.
2012-05-01 23:30:03 +00:00
distclean: clean
rm -f config.mak
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
obj/include/bits/alltypes.h: $(srcdir)/arch/$(ARCH)/bits/alltypes.h.in $(srcdir)/include/alltypes.h.in $(srcdir)/tools/mkalltypes.sed
sed -f $(srcdir)/tools/mkalltypes.sed $(srcdir)/arch/$(ARCH)/bits/alltypes.h.in $(srcdir)/include/alltypes.h.in > $@
preparing build system to handle ports - step 1
2011-02-15 05:33:23 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
obj/src/internal/version.h: $(wildcard $(srcdir)/VERSION $(srcdir)/.git)
printf '#define VERSION "%s"\n' "$$(cd $(srcdir); sh tools/version.sh)" > $@
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
obj/src/internal/version.o obj/src/internal/version.lo: obj/src/internal/version.h
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
obj/crt/rcrt1.o obj/src/ldso/dlstart.lo obj/src/ldso/dynlink.lo: $(srcdir)/src/internal/dynlink.h $(srcdir)/arch/$(ARCH)/reloc.h
add infrastructure to record and report the version of libc.so this is still experimental and subject to change. for git checkouts, an attempt is made to record the exact revision to aid in bug reports and debugging. no version information is recorded in the static libc.a or binaries it's linked into.
2013-12-01 22:27:25 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
obj/crt/crt1.o obj/crt/scrt1.o obj/crt/rcrt1.o obj/src/ldso/dlstart.lo: $(srcdir)/arch/$(ARCH)/crt_arch.h
add infrastructure to record and report the version of libc.so this is still experimental and subject to change. for git checkouts, an attempt is made to record the exact revision to aid in bug reports and debugging. no version information is recorded in the static libc.a or binaries it's linked into.
2013-12-01 22:27:25 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
obj/crt/rcrt1.o: $(srcdir)/src/ldso/dlstart.c
make dynlink.lo depend on reloc.h in makefile this is mainly a development convenience but will also ensure users building from latest git always get up-to-date arch-specific dynamic linker code without having to "make clean".
2012-08-05 16:32:20 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
obj/crt/Scrt1.o obj/crt/rcrt1.o: CFLAGS_ALL += -fPIC
add additional Makefile dependency rules for rcrt1.o PIE start file
2015-06-03 06:00:44 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
obj/crt/$(ARCH)/crti.o: $(srcdir)/crt/$(ARCH)/crti.s
new mostly-C crt1 implementation the only immediate effect of this commit is enabling PIE support on some archs that did not previously have any Scrt1.s, since the existing asm files for crt1 override this C code. so some of the crt_arch.h files committed are only there for the sake of documenting what their archs "would do" if they used the new C-based crt1. the expectation is that new archs should use this new system rather than using heavy asm for crt1. aside from being easier and less error-prone, it also ensures that PIE support is available immediately (since Scrt1.o is generated from the same C source, using -fPIC) rather than having to be added as an afterthought in the porting process.
2013-07-26 05:49:14 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
obj/crt/$(ARCH)/crtn.o: $(srcdir)/crt/$(ARCH)/crtn.s
new mostly-C crt1 implementation the only immediate effect of this commit is enabling PIE support on some archs that did not previously have any Scrt1.s, since the existing asm files for crt1 override this C code. so some of the crt_arch.h files committed are only there for the sake of documenting what their archs "would do" if they used the new C-based crt1. the expectation is that new archs should use this new system rather than using heavy asm for crt1. aside from being easier and less error-prone, it also ensures that PIE support is available immediately (since Scrt1.o is generated from the same C source, using -fPIC) rather than having to be added as an afterthought in the porting process.
2013-07-26 05:49:14 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
OPTIMIZE_SRCS = $(wildcard $(OPTIMIZE_GLOBS:%=$(srcdir)/src/%))
$(OPTIMIZE_SRCS:$(srcdir)/%.c=obj/%.o) $(OPTIMIZE_SRCS:$(srcdir)/%.c=obj/%.lo): CFLAGS += -O3
enhance build process to allow selective -O3 optimization the motivation for this patch is that the vast majority of libc is code that does not benefit at all from optimizations, but that certain components like string/memory operations can be major performance bottlenecks. at the same time, the old -falign-*=1 options are removed, since they were only beneficial for avoiding bloat when global -O3 was used, and in that case, they may have prevented some of the performance gains. to be the most useful, this patch will need further tuning. in particular, research is needed to determine which components should be built with -O3 by default, and it may be desirable to remove the hard-coded -O3 and instead allow more customization of the optimization level used for selected modules.
2013-07-23 01:22:04 +00:00
work around gcc 4.8's generation of self-referential mem* functions at -O3
2013-08-01 21:12:23 +00:00
MEMOPS_SRCS = src/string/memcpy.c src/string/memmove.c src/string/memcmp.c src/string/memset.c
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
$(MEMOPS_SRCS:%.c=obj/%.o) $(MEMOPS_SRCS:%.c=obj/%.lo): CFLAGS_ALL += $(CFLAGS_MEMOPS)
work around gcc 4.8's generation of self-referential mem* functions at -O3
2013-08-01 21:12:23 +00:00
allow libc itself to be built with stack protector enabled this was already essentially possible as a result of the previous commits changing the dynamic linker/thread pointer bootstrap process. this commit mainly adds build system infrastructure: configure no longer attempts to disable stack protector. instead it simply determines how so the makefile can disable stack protector for a few translation units used during early startup. stack protector is also disabled for memcpy and memset since compilers (incorrectly) generate calls to them on some archs to implement struct initialization and assignment, and such calls may creep into early initialization. no explicit attempt to enable stack protector is made by configure at this time; any stack protector option supported by the compiler can be passed to configure in CFLAGS, and if the compiler uses stack protector by default, this default is respected.
2015-04-14 00:13:10 +00:00
NOSSP_SRCS = $(wildcard crt/*.c) \
src/env/__libc_start_main.c src/env/__init_tls.c \
src/thread/__set_thread_area.c src/env/__stack_chk_fail.c \
src/string/memset.c src/string/memcpy.c \
src/ldso/dlstart.c src/ldso/dynlink.c
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
$(NOSSP_SRCS:%.c=obj/%.o) $(NOSSP_SRCS:%.c=obj/%.lo): CFLAGS_ALL += $(CFLAGS_NOSSP)
allow libc itself to be built with stack protector enabled this was already essentially possible as a result of the previous commits changing the dynamic linker/thread pointer bootstrap process. this commit mainly adds build system infrastructure: configure no longer attempts to disable stack protector. instead it simply determines how so the makefile can disable stack protector for a few translation units used during early startup. stack protector is also disabled for memcpy and memset since compilers (incorrectly) generate calls to them on some archs to implement struct initialization and assignment, and such calls may creep into early initialization. no explicit attempt to enable stack protector is made by configure at this time; any stack protector option supported by the compiler can be passed to configure in CFLAGS, and if the compiler uses stack protector by default, this default is respected.
2015-04-14 00:13:10 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
$(CRT_LIBS:lib/%=obj/crt/%): CFLAGS_ALL += -DCRT
add optional global visibility override this is implemented via the build system and does not affect source files. the idea is to use protected or hidden visibility to prevent the compiler from pessimizing function calls within a shared (or position-independent static) libc in the form of overhead setting up for a call through the PLT. the ld-time symbol binding via the -Bsymbolic-functions option already optimized out the PLT itself, but not the code in the caller needed to support a call through the PLT. on some archs this overhead can be substantial; on others it's trivial.
2015-04-20 02:05:29 +00:00
rework makefile subarch logic to allow shared files instead of subarchs getting their own .s files which are used directly by the makefile to replace the .c file, they now must provide a .sub file whose contents are a pathname, relative to the location of the .sub file, which will substitute for the .c file. essentially these files are acting as symbolic links, but implemented as text files.
2013-08-14 06:50:25 +00:00
# This incantation ensures that changes to any subarch asm files will
# force the corresponding object file to be rebuilt, even if the implicit
# rule below goes indirectly through a .sub file.
define mkasmdep
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
$(patsubst $(srcdir)/%,obj/%,$(dir $(patsubst %/,%,$(dir $(1))))$(ARCH)$(ASMSUBARCH)/$(notdir $(1:.s=.o))): $(1)
rework makefile subarch logic to allow shared files instead of subarchs getting their own .s files which are used directly by the makefile to replace the .c file, they now must provide a .sub file whose contents are a pathname, relative to the location of the .sub file, which will substitute for the .c file. essentially these files are acting as symbolic links, but implemented as text files.
2013-08-14 06:50:25 +00:00
endef
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
$(foreach s,$(wildcard $(srcdir)/src/*/$(ARCH)*/*.s),$(eval $(call mkasmdep,$(s))))
rework makefile subarch logic to allow shared files instead of subarchs getting their own .s files which are used directly by the makefile to replace the .c file, they now must provide a .sub file whose contents are a pathname, relative to the location of the .sub file, which will substitute for the .c file. essentially these files are acting as symbolic links, but implemented as text files.
2013-08-14 06:50:25 +00:00
eliminate separate static/shared CFLAGS vars in makefile this allows the rules for .o and .lo files to be identical, with -fPIC and -DSHARED added for .lo files via target-specific variable append. this is arguably cleaner now and will allow more cleanup and removal of redundant rule bodies after other prerequisite changes are made.
2016-01-20 00:08:52 +00:00
$(LOBJS): CFLAGS_ALL += -fPIC -DSHARED
Build process uses script to add CFI directives to x86 asm Some functions implemented in asm need to use EBP for purposes other than acting as a frame pointer. (Notably, it is used for the 6th argument to syscalls with 6 arguments.) Without frame pointers, GDB can only show backtraces if it gets CFI information from a .debug_frame or .eh_frame ELF section. Rather than littering our asm with ugly .cfi directives, use an awk script to insert them in the right places during the build process, so GDB can keep track of where the current stack frame is relative to the stack pointer. This means GDB can produce beautiful stack traces at any given point when single-stepping through asm functions. Additionally, when registers are saved on the stack and later overwritten, emit ..cfi directives so GDB will know where they were saved relative to the stack pointer. This way, when you look back up the stack from within an asm function, you can still reliably print the values of local variables in the caller. If this awk script were to understand every possible wild and crazy contortion that an asm programmer can do with the stack and registers, and always emit the exact ..cfi directives needed for GDB to know what the register values were in the preceding stack frame, it would necessarily be as complex as a full x86 emulator. That way lies madness. Hence, we assume that the stack pointer will _only_ ever be adjusted using push/pop or else add/sub with a constant. We do not attempt to detect every possible way that a register value could be saved for later use, just the simple and common ways. Thanks to Szabolcs Nagy for suggesting numerous improvements to this code.
2015-07-10 13:03:24 +00:00
# Choose invocation of assembler to be used
# $(1) is input file, $(2) is output file, $(3) is assembler flags
ifeq ($(ADD_CFI),yes)
eliminate separate static/shared CFLAGS vars in makefile this allows the rules for .o and .lo files to be identical, with -fPIC and -DSHARED added for .lo files via target-specific variable append. this is arguably cleaner now and will allow more cleanup and removal of redundant rule bodies after other prerequisite changes are made.
2016-01-20 00:08:52 +00:00
AS_CMD = LC_ALL=C awk -f $(srcdir)/tools/add-cfi.common.awk -f $(srcdir)/tools/add-cfi.$(ARCH).awk $< | $(CC) $(CFLAGS_ALL) -x assembler -c -o $@ -
Build process uses script to add CFI directives to x86 asm Some functions implemented in asm need to use EBP for purposes other than acting as a frame pointer. (Notably, it is used for the 6th argument to syscalls with 6 arguments.) Without frame pointers, GDB can only show backtraces if it gets CFI information from a .debug_frame or .eh_frame ELF section. Rather than littering our asm with ugly .cfi directives, use an awk script to insert them in the right places during the build process, so GDB can keep track of where the current stack frame is relative to the stack pointer. This means GDB can produce beautiful stack traces at any given point when single-stepping through asm functions. Additionally, when registers are saved on the stack and later overwritten, emit ..cfi directives so GDB will know where they were saved relative to the stack pointer. This way, when you look back up the stack from within an asm function, you can still reliably print the values of local variables in the caller. If this awk script were to understand every possible wild and crazy contortion that an asm programmer can do with the stack and registers, and always emit the exact ..cfi directives needed for GDB to know what the register values were in the preceding stack frame, it would necessarily be as complex as a full x86 emulator. That way lies madness. Hence, we assume that the stack pointer will _only_ ever be adjusted using push/pop or else add/sub with a constant. We do not attempt to detect every possible way that a register value could be saved for later use, just the simple and common ways. Thanks to Szabolcs Nagy for suggesting numerous improvements to this code.
2015-07-10 13:03:24 +00:00
else
eliminate separate static/shared CFLAGS vars in makefile this allows the rules for .o and .lo files to be identical, with -fPIC and -DSHARED added for .lo files via target-specific variable append. this is arguably cleaner now and will allow more cleanup and removal of redundant rule bodies after other prerequisite changes are made.
2016-01-20 00:08:52 +00:00
AS_CMD = $(CC) $(CFLAGS_ALL) -c -o $@ $<
Build process uses script to add CFI directives to x86 asm Some functions implemented in asm need to use EBP for purposes other than acting as a frame pointer. (Notably, it is used for the 6th argument to syscalls with 6 arguments.) Without frame pointers, GDB can only show backtraces if it gets CFI information from a .debug_frame or .eh_frame ELF section. Rather than littering our asm with ugly .cfi directives, use an awk script to insert them in the right places during the build process, so GDB can keep track of where the current stack frame is relative to the stack pointer. This means GDB can produce beautiful stack traces at any given point when single-stepping through asm functions. Additionally, when registers are saved on the stack and later overwritten, emit ..cfi directives so GDB will know where they were saved relative to the stack pointer. This way, when you look back up the stack from within an asm function, you can still reliably print the values of local variables in the caller. If this awk script were to understand every possible wild and crazy contortion that an asm programmer can do with the stack and registers, and always emit the exact ..cfi directives needed for GDB to know what the register values were in the preceding stack frame, it would necessarily be as complex as a full x86 emulator. That way lies madness. Hence, we assume that the stack pointer will _only_ ever be adjusted using push/pop or else add/sub with a constant. We do not attempt to detect every possible way that a register value could be saved for later use, just the simple and common ways. Thanks to Szabolcs Nagy for suggesting numerous improvements to this code.
2015-07-10 13:03:24 +00:00
endif
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
obj/%.o: $(srcdir)/%.sub
eliminate separate static/shared CFLAGS vars in makefile this allows the rules for .o and .lo files to be identical, with -fPIC and -DSHARED added for .lo files via target-specific variable append. this is arguably cleaner now and will allow more cleanup and removal of redundant rule bodies after other prerequisite changes are made.
2016-01-20 00:08:52 +00:00
$(CC) $(CFLAGS_ALL) -c -o $@ $(dir $<)$$(cat $<)
allow subarch-specific asm, including asm specific to the default the default subarch is the one whose full name is just the base arch name, with no suffixes. normally, either the asm in the default subarch is suitable for all subarch variants, or separate asm is mandatory for each variant. however, in the case of asm which is purely for optimization purposes, it's possible to have asm that only works (or only performs well) on the default subarch, and not any othe the other variants. thus, I have added a mechanism to give a name to the default variant, for example "armel" for the default, little-endian arm. further such default-subarch names can be added in the future as needed.
2013-08-11 07:27:35 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
obj/%.o: $(srcdir)/%.s
eliminate separate static/shared CFLAGS vars in makefile this allows the rules for .o and .lo files to be identical, with -fPIC and -DSHARED added for .lo files via target-specific variable append. this is arguably cleaner now and will allow more cleanup and removal of redundant rule bodies after other prerequisite changes are made.
2016-01-20 00:08:52 +00:00
$(AS_CMD) $(CFLAGS_ALL)
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
add support for arch-provided replacement files as .c or .S previously, replacement files provided in $(ARCH) dirs under src/ had to be .s files. in order to replace a file with C source, an empty .s file was needed there to suppress the original file, and a separate .c file was needed in arch/$(ARCH)/src/. support for .S is new and is aimed at short-term use eliminating .sub files. asm source files are still expected not to make any heavy preprocessor use, just simple conditionals on subarch. eventually most affected files may be replaced with C source files with minimal inline asm instead of asm source files.
2016-01-19 23:19:01 +00:00
obj/%.o: $(srcdir)/%.S
eliminate separate static/shared CFLAGS vars in makefile this allows the rules for .o and .lo files to be identical, with -fPIC and -DSHARED added for .lo files via target-specific variable append. this is arguably cleaner now and will allow more cleanup and removal of redundant rule bodies after other prerequisite changes are made.
2016-01-20 00:08:52 +00:00
$(CC) $(CFLAGS_ALL) -c -o $@ $<
add support for arch-provided replacement files as .c or .S previously, replacement files provided in $(ARCH) dirs under src/ had to be .s files. in order to replace a file with C source, an empty .s file was needed there to suppress the original file, and a separate .c file was needed in arch/$(ARCH)/src/. support for .S is new and is aimed at short-term use eliminating .sub files. asm source files are still expected not to make any heavy preprocessor use, just simple conditionals on subarch. eventually most affected files may be replaced with C source files with minimal inline asm instead of asm source files.
2016-01-19 23:19:01 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
obj/%.o: $(srcdir)/%.c $(GENH) $(IMPH)
eliminate separate static/shared CFLAGS vars in makefile this allows the rules for .o and .lo files to be identical, with -fPIC and -DSHARED added for .lo files via target-specific variable append. this is arguably cleaner now and will allow more cleanup and removal of redundant rule bodies after other prerequisite changes are made.
2016-01-20 00:08:52 +00:00
$(CC) $(CFLAGS_ALL) -c -o $@ $<
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
obj/%.lo: $(srcdir)/%.sub
eliminate separate static/shared CFLAGS vars in makefile this allows the rules for .o and .lo files to be identical, with -fPIC and -DSHARED added for .lo files via target-specific variable append. this is arguably cleaner now and will allow more cleanup and removal of redundant rule bodies after other prerequisite changes are made.
2016-01-20 00:08:52 +00:00
$(CC) $(CFLAGS_ALL) -c -o $@ $(dir $<)$$(cat $<)
add subarch asm support for PIC objects/shared libc this rule was omitted in previous subarch asm commit
2013-08-11 07:49:16 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
obj/%.lo: $(srcdir)/%.s
eliminate separate static/shared CFLAGS vars in makefile this allows the rules for .o and .lo files to be identical, with -fPIC and -DSHARED added for .lo files via target-specific variable append. this is arguably cleaner now and will allow more cleanup and removal of redundant rule bodies after other prerequisite changes are made.
2016-01-20 00:08:52 +00:00
$(AS_CMD) $(CFLAGS_ALL)
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
add support for arch-provided replacement files as .c or .S previously, replacement files provided in $(ARCH) dirs under src/ had to be .s files. in order to replace a file with C source, an empty .s file was needed there to suppress the original file, and a separate .c file was needed in arch/$(ARCH)/src/. support for .S is new and is aimed at short-term use eliminating .sub files. asm source files are still expected not to make any heavy preprocessor use, just simple conditionals on subarch. eventually most affected files may be replaced with C source files with minimal inline asm instead of asm source files.
2016-01-19 23:19:01 +00:00
obj/%.lo: $(srcdir)/%.S
eliminate separate static/shared CFLAGS vars in makefile this allows the rules for .o and .lo files to be identical, with -fPIC and -DSHARED added for .lo files via target-specific variable append. this is arguably cleaner now and will allow more cleanup and removal of redundant rule bodies after other prerequisite changes are made.
2016-01-20 00:08:52 +00:00
$(CC) $(CFLAGS_ALL) -c -o $@ $<
add support for arch-provided replacement files as .c or .S previously, replacement files provided in $(ARCH) dirs under src/ had to be .s files. in order to replace a file with C source, an empty .s file was needed there to suppress the original file, and a separate .c file was needed in arch/$(ARCH)/src/. support for .S is new and is aimed at short-term use eliminating .sub files. asm source files are still expected not to make any heavy preprocessor use, just simple conditionals on subarch. eventually most affected files may be replaced with C source files with minimal inline asm instead of asm source files.
2016-01-19 23:19:01 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
obj/%.lo: $(srcdir)/%.c $(GENH) $(IMPH)
eliminate separate static/shared CFLAGS vars in makefile this allows the rules for .o and .lo files to be identical, with -fPIC and -DSHARED added for .lo files via target-specific variable append. this is arguably cleaner now and will allow more cleanup and removal of redundant rule bodies after other prerequisite changes are made.
2016-01-20 00:08:52 +00:00
$(CC) $(CFLAGS_ALL) -c -o $@ $<
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
cleanup shared library build system to be more $HOME-local-install friendly the path for the dynamic linker is now configurable, and failure to install the symlink for it will not stop the build.
2011-06-28 01:38:11 +00:00
lib/libc.so: $(LOBJS)
eliminate separate static/shared CFLAGS vars in makefile this allows the rules for .o and .lo files to be identical, with -fPIC and -DSHARED added for .lo files via target-specific variable append. this is arguably cleaner now and will allow more cleanup and removal of redundant rule bodies after other prerequisite changes are made.
2016-01-20 00:08:52 +00:00
$(CC) $(CFLAGS_ALL) $(LDFLAGS_ALL) -nostdlib -shared \
rename dynamic linker entry point from _start to _dlstart the main motivation for this change is to aid in debugging. since the main program's entry point is also named _start, it was difficult to set breakpoints or quickly identify which _start execution stopped in.
2014-06-20 04:25:12 +00:00
-Wl,-e,_dlstart -Wl,-Bsymbolic-functions \
remove soname from libc.so/ld-musl it serves no purpose (binaries linked against musl as -lc/libc.so automatically get the right DT_NEEDED value of libc.so) and causes ldconfig to misbehave (making a symlink to ld-musl named libc.so in /lib). ldconfig is not used on pure musl systems, but if ld-musl is installed on a system where it's not the primary libc, this will pollute the system /lib with a symlink to musl named libc.so, which should NOT exist and could cause problems linking native apps. also, the existence of the soname caused spurious warnings from ldconfig when /lib and /usr/lib were the same physical directory.
2013-03-10 03:34:11 +00:00
-o $@ $(LOBJS) $(LIBCC)
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
new solution for empty lib dir (old one had some problems)
2011-02-17 22:12:52 +00:00
lib/libc.a: $(OBJS)
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
rm -f $@
$(AR) rc $@ $(OBJS)
$(RANLIB) $@
new solution for empty lib dir (old one had some problems)
2011-02-17 22:12:52 +00:00
$(EMPTY_LIBS):
rm -f $@
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
$(AR) rc $@
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
lib/%.o: obj/crt/%.o
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
cp $< $@
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
lib/crti.o: obj/crt/$(ARCH)/crti.o
cp $< $@
lib/crtn.o: obj/crt/$(ARCH)/crtn.o
cp $< $@
lib/musl-gcc.specs: $(srcdir)/tools/musl-gcc.specs.sh config.mak
new gcc wrapper, entirely specfile based the _concept_ of this wrapper has been tested extensively, but the integration with the build/install system, and using a persistent specfile rather than one generated at build-time, have not been heavily tested and may need minor tweaks. this approach should be a lot more robust (and easier to improve) than writing a shell script that's responsible for trying to mimic gcc's logic about whether it's compiling or linking, building shared libs or executable files, etc. it's also lighter weight and should result in mildly faster builds when using the wrapper.
2012-04-22 18:32:49 +00:00
sh $< "$(includedir)" "$(libdir)" "$(LDSO_PATHNAME)" > $@
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
obj/musl-gcc: config.mak
build: overhaul wrapper script system for multiple wrapper support this overhauls part of the build system in order to support multiple toolchain wrapper scripts, as opposed to solely the musl-gcc wrapper as before. it thereby replaces --enable-gcc-wrapper with --enable-wrapper=..., which has the options 'auto' (the default, detect whether to use wrappers), 'all' (build and install all wrappers), 'no' (don't build any) and finally the options named after the individual compiler scripts (currently only 'gcc' is available) to build and install only that wrapper. the old --enable-gcc-wrapper is removed from --help, but still available. it also modifies the wrappers to use the C compiler specified to the build system as 'inner' compiler, when applicable. as wrapper detection works by probing this compiler, it may not work with any other.
2015-06-28 21:08:19 +00:00
printf '#!/bin/sh\nexec "$${REALGCC:-$(WRAPCC_GCC)}" "$$@" -specs "%s/musl-gcc.specs"\n' "$(libdir)" > $@
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
chmod +x $@
add musl-clang, a wrapper for system clang installs musl-clang allows the user to compile musl-powered programs using their already existent clang install, without the need of a special cross compiler. it achieves this by wrapping around both the system clang install and the linker and passing them special flags to re-target musl at runtime. it does only affect invocations done through the special musl-clang wrapper script, so that the user setup remains fully intact otherwise. the clang wrapper consists of the compiler frontend wrapper script, musl-clang, and the linker wrapper script, ld.musl-clang. musl-clang makes sure clang invokes ld.musl-clang to link objects; neither script needs to be in PATH for the wrapper to work.
2015-06-28 21:08:21 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
obj/%-clang: $(srcdir)/tools/%-clang.in config.mak
add musl-clang, a wrapper for system clang installs musl-clang allows the user to compile musl-powered programs using their already existent clang install, without the need of a special cross compiler. it achieves this by wrapping around both the system clang install and the linker and passing them special flags to re-target musl at runtime. it does only affect invocations done through the special musl-clang wrapper script, so that the user setup remains fully intact otherwise. the clang wrapper consists of the compiler frontend wrapper script, musl-clang, and the linker wrapper script, ld.musl-clang. musl-clang makes sure clang invokes ld.musl-clang to link objects; neither script needs to be in PATH for the wrapper to work.
2015-06-28 21:08:21 +00:00
sed -e 's!@CC@!$(WRAPCC_CLANG)!g' -e 's!@PREFIX@!$(prefix)!g' -e 's!@INCDIR@!$(includedir)!g' -e 's!@LIBDIR@!$(libdir)!g' -e 's!@LDSO@!$(LDSO_PATHNAME)!g' $< > $@
chmod +x $@
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
$(DESTDIR)$(bindir)/%: obj/%
replace system's install command with a shell script the historical (non-standardized) install command is really inappropriate for installing binaries/libraries on a system that utilizes memory-mapped executable files. rather than replacing an existing file atomically, it overwrites the existing file. this can cause running programs to see a partially-modified version of the file, resulting in unpredictable behavior, or SIGBUS. a MAP_COPY mode for mmap would get around this problem, but Linux lacks MAP_COPY. the shell script added with this commit works around the problem by writing temporary files and moving them into place. unlike the historical install utility, it also support a -l option for installing a symbolic link atomically, via the same method.
2013-08-18 02:21:11 +00:00
$(INSTALL) -D $< $@
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
cleanup shared library build system to be more $HOME-local-install friendly the path for the dynamic linker is now configurable, and failure to install the symlink for it will not stop the build.
2011-06-28 01:38:11 +00:00
$(DESTDIR)$(libdir)/%.so: lib/%.so
replace system's install command with a shell script the historical (non-standardized) install command is really inappropriate for installing binaries/libraries on a system that utilizes memory-mapped executable files. rather than replacing an existing file atomically, it overwrites the existing file. this can cause running programs to see a partially-modified version of the file, resulting in unpredictable behavior, or SIGBUS. a MAP_COPY mode for mmap would get around this problem, but Linux lacks MAP_COPY. the shell script added with this commit works around the problem by writing temporary files and moving them into place. unlike the historical install utility, it also support a -l option for installing a symbolic link atomically, via the same method.
2013-08-18 02:21:11 +00:00
$(INSTALL) -D -m 755 $< $@
cleanup shared library build system to be more $HOME-local-install friendly the path for the dynamic linker is now configurable, and failure to install the symlink for it will not stop the build.
2011-06-28 01:38:11 +00:00
adapt build/install/gcc-wrapper systems for dynamic linking support
2011-06-24 02:13:47 +00:00
$(DESTDIR)$(libdir)/%: lib/%
replace system's install command with a shell script the historical (non-standardized) install command is really inappropriate for installing binaries/libraries on a system that utilizes memory-mapped executable files. rather than replacing an existing file atomically, it overwrites the existing file. this can cause running programs to see a partially-modified version of the file, resulting in unpredictable behavior, or SIGBUS. a MAP_COPY mode for mmap would get around this problem, but Linux lacks MAP_COPY. the shell script added with this commit works around the problem by writing temporary files and moving them into place. unlike the historical install utility, it also support a -l option for installing a symbolic link atomically, via the same method.
2013-08-18 02:21:11 +00:00
$(INSTALL) -D -m 644 $< $@
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
$(DESTDIR)$(includedir)/bits/%: $(srcdir)/arch/$(ARCH)/bits/%
$(INSTALL) -D -m 644 $< $@
$(DESTDIR)$(includedir)/bits/%: obj/include/bits/%
replace system's install command with a shell script the historical (non-standardized) install command is really inappropriate for installing binaries/libraries on a system that utilizes memory-mapped executable files. rather than replacing an existing file atomically, it overwrites the existing file. this can cause running programs to see a partially-modified version of the file, resulting in unpredictable behavior, or SIGBUS. a MAP_COPY mode for mmap would get around this problem, but Linux lacks MAP_COPY. the shell script added with this commit works around the problem by writing temporary files and moving them into place. unlike the historical install utility, it also support a -l option for installing a symbolic link atomically, via the same method.
2013-08-18 02:21:11 +00:00
$(INSTALL) -D -m 644 $< $@
fix Makefile so "make install" works before include/bits symlink exists previously, determination of the list of header files for installation depended on the include/bits symlink (to the arch-specific files) already having been created. in other words, running "make install" immediately after configure without first running "make" caused the bits headers not to be installed. the solution I have applied is to pull the list of headers directly from arch/$(ARCH)/bits rather than include/bits, and likewise to install directly from arch/$(ARCH)/bits rather than via the symlink. at this point, the only purpose served by keeping the symlink around is that it enables use of the in-tree headers and libs directly via -I and -L, which can be useful when testing against a new version of the library before installing it. on the other hand, removing the bits symlink would be beneficial if we ever want to support building multiple archs in the same source tree.
2013-07-01 17:43:43 +00:00
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
$(DESTDIR)$(includedir)/%: $(srcdir)/include/%
replace system's install command with a shell script the historical (non-standardized) install command is really inappropriate for installing binaries/libraries on a system that utilizes memory-mapped executable files. rather than replacing an existing file atomically, it overwrites the existing file. this can cause running programs to see a partially-modified version of the file, resulting in unpredictable behavior, or SIGBUS. a MAP_COPY mode for mmap would get around this problem, but Linux lacks MAP_COPY. the shell script added with this commit works around the problem by writing temporary files and moving them into place. unlike the historical install utility, it also support a -l option for installing a symbolic link atomically, via the same method.
2013-08-18 02:21:11 +00:00
$(INSTALL) -D -m 644 $< $@
adapt build/install/gcc-wrapper systems for dynamic linking support
2011-06-24 02:13:47 +00:00
fix atomicity and other issues installing dynamic linker symlink ln -sf is non-atomic; it unlinks the destination first. instead, make a temporary link and rename it into place. this commit also fixes some of the dependency tracking behavior for the link. depending on the directory it's to be installed in is not reasonable; it causes a new link to be attempted if the library directory has been modified, but does not attempt to make a new link just because libc has been updated. instead, depend on the target to be linked to. this will ensure that, if prefix has changed but syslibdir has not, the link will be updated to point to the new prefix.
2013-08-16 21:51:38 +00:00
$(DESTDIR)$(LDSO_PATHNAME): $(DESTDIR)$(libdir)/libc.so
fix regression in creation of ldso symlink DESTDIR was wrongly included in the symlink contents.
2013-08-31 15:36:56 +00:00
$(INSTALL) -D -l $(libdir)/libc.so $@ || true
improve the build rules for installing /lib/ld-musl-$ARCH.so these new rules should avoid spurious error messages when the directory (usually /lib) and the dynamic linker symlink already exist, and minimize the spam when they can't be created.
2012-05-05 01:54:57 +00:00
split up installation target patch by Luca Barbato (lu_zero)
2012-08-17 23:32:24 +00:00
install-libs: $(ALL_LIBS:lib/%=$(DESTDIR)$(libdir)/%) $(if $(SHARED_LIBS),$(DESTDIR)$(LDSO_PATHNAME),)
install-headers: $(ALL_INCLUDES:include/%=$(DESTDIR)$(includedir)/%)
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
install-tools: $(ALL_TOOLS:obj/%=$(DESTDIR)$(bindir)/%)
split up installation target patch by Luca Barbato (lu_zero)
2012-08-17 23:32:24 +00:00
add tarball-producing targets to Makefile for ease of release my old, out-of-tree release script that performed a clone rather than using git archive checked the VERSION file to make sure that it matched before doing a release. I believe there should be a way to do the same with git commands (without resorting to checking out the desired tag) but I have not yet found a way, so care should be taken when using these targets that the correctness of the VERSION file is not overlooked.
2014-06-25 20:14:37 +00:00
musl-git-%.tar.gz: .git
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
git --git-dir=$(srcdir)/.git archive --format=tar.gz --prefix=$(patsubst %.tar.gz,%,$@)/ -o $@ $(patsubst musl-git-%.tar.gz,%,$@)
split up installation target patch by Luca Barbato (lu_zero)
2012-08-17 23:32:24 +00:00
add tarball-producing targets to Makefile for ease of release my old, out-of-tree release script that performed a clone rather than using git archive checked the VERSION file to make sure that it matched before doing a release. I believe there should be a way to do the same with git commands (without resorting to checking out the desired tag) but I have not yet found a way, so care should be taken when using these targets that the correctness of the VERSION file is not overlooked.
2014-06-25 20:14:37 +00:00
musl-%.tar.gz: .git
support out-of-tree build this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
2015-11-18 20:07:32 +00:00
git --git-dir=$(srcdir)/.git archive --format=tar.gz --prefix=$(patsubst %.tar.gz,%,$@)/ -o $@ v$(patsubst musl-%.tar.gz,%,$@)
split up installation target patch by Luca Barbato (lu_zero)
2012-08-17 23:32:24 +00:00
.PHONY: all clean install install-libs install-headers install-tools