mirror of
git://git.musl-libc.org/musl
synced 2024-12-14 02:35:17 +00:00
200d15479c
With the exception of a fenv implementation, the port is fully featured. The port has been tested in or1ksim, the golden reference functional simulator for OpenRISC 1000. It passes all libc-test tests (except the math tests that requires a fenv implementation). The port assumes an or1k implementation that has support for atomic instructions (l.lwa/l.swa). Although it passes all the libc-test tests, the port is still in an experimental state, and has yet experienced very little 'real-world' use.
537 lines
15 KiB
Bash
Executable File
537 lines
15 KiB
Bash
Executable File
#!/bin/sh
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usage () {
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cat <<EOF
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Usage: $0 [OPTION]... [VAR=VALUE]... [TARGET]
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To assign environment variables (e.g., CC, CFLAGS...), specify them as
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VAR=VALUE. See below for descriptions of some of the useful variables.
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Defaults for the options are specified in brackets.
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Installation directories:
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--prefix=PREFIX main installation prefix [/usr/local/musl]
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--exec-prefix=EPREFIX installation prefix for executable files [PREFIX]
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Fine tuning of the installation directories:
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--bindir=DIR user executables [EPREFIX/bin]
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--libdir=DIR library files for the linker [PREFIX/lib]
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--includedir=DIR include files for the C compiler [PREFIX/include]
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--syslibdir=DIR location for the dynamic linker [/lib]
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System types:
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--target=TARGET configure to run on target TARGET [detected]
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--host=HOST same as --target
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Optional features:
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--enable-optimize=... optimize listed components for speed over size [auto]
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--enable-debug build with debugging information [disabled]
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--enable-warnings build with recommended warnings flags [disabled]
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--enable-gcc-wrapper build musl-gcc toolchain wrapper [auto]
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--disable-shared inhibit building shared library [enabled]
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--disable-static inhibit building static library [enabled]
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Some influential environment variables:
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CC C compiler command [detected]
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CFLAGS C compiler flags [-Os -pipe ...]
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CROSS_COMPILE prefix for cross compiler and tools [none]
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LIBCC compiler runtime library [detected]
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Use these variables to override the choices made by configure.
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EOF
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exit 0
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}
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# Helper functions
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quote () {
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tr '\n' ' ' <<EOF | grep '^[-[:alnum:]_=,./:]* $' >/dev/null 2>&1 && { echo "$1" ; return 0 ; }
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$1
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EOF
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printf %s\\n "$1" | sed -e "s/'/'\\\\''/g" -e "1s/^/'/" -e "\$s/\$/'/" -e "s#^'\([-[:alnum:]_,./:]*\)=\(.*\)\$#\1='\2#"
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}
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echo () { printf "%s\n" "$*" ; }
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fail () { echo "$*" ; exit 1 ; }
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fnmatch () { eval "case \"\$2\" in $1) return 0 ;; *) return 1 ;; esac" ; }
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cmdexists () { type "$1" >/dev/null 2>&1 ; }
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trycc () { test -z "$CC" && cmdexists "$1" && CC=$1 ; }
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stripdir () {
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while eval "fnmatch '*/' \"\${$1}\"" ; do eval "$1=\${$1%/}" ; done
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}
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trycppif () {
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printf "checking preprocessor condition %s... " "$1"
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echo "typedef int x;" > "$tmpc"
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echo "#if $1" >> "$tmpc"
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echo "#error yes" >> "$tmpc"
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echo "#endif" >> "$tmpc"
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if $CC $2 -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
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printf "false\n"
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return 1
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else
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printf "true\n"
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return 0
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fi
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}
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tryflag () {
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printf "checking whether compiler accepts %s... " "$2"
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echo "typedef int x;" > "$tmpc"
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if $CC "$2" -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
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printf "yes\n"
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eval "$1=\"\${$1} \$2\""
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eval "$1=\${$1# }"
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return 0
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else
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printf "no\n"
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return 1
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fi
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}
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tryldflag () {
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printf "checking whether linker accepts %s... " "$2"
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echo "typedef int x;" > "$tmpc"
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if $CC -nostdlib -shared "$2" -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
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printf "yes\n"
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eval "$1=\"\${$1} \$2\""
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eval "$1=\${$1# }"
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return 0
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else
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printf "no\n"
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return 1
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fi
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}
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# Beginning of actual script
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CFLAGS_C99FSE=
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CFLAGS_AUTO=
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CFLAGS_MEMOPS=
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LDFLAGS_AUTO=
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OPTIMIZE_GLOBS=
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prefix=/usr/local/musl
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exec_prefix='$(prefix)'
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bindir='$(exec_prefix)/bin'
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libdir='$(prefix)/lib'
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includedir='$(prefix)/include'
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syslibdir='/lib'
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target=
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optimize=auto
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debug=no
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warnings=no
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shared=auto
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static=yes
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wrapper=auto
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for arg ; do
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case "$arg" in
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--help) usage ;;
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--prefix=*) prefix=${arg#*=} ;;
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--exec-prefix=*) exec_prefix=${arg#*=} ;;
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--bindir=*) bindir=${arg#*=} ;;
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--libdir=*) libdir=${arg#*=} ;;
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--includedir=*) includedir=${arg#*=} ;;
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--syslibdir=*) syslibdir=${arg#*=} ;;
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--enable-shared|--enable-shared=yes) shared=yes ;;
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--disable-shared|--enable-shared=no) shared=no ;;
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--enable-static|--enable-static=yes) static=yes ;;
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--disable-static|--enable-static=no) static=no ;;
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--enable-optimize) optimize=yes ;;
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--enable-optimize=*) optimize=${arg#*=} ;;
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--disable-optimize) optimize=no ;;
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--enable-debug|--enable-debug=yes) debug=yes ;;
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--disable-debug|--enable-debug=no) debug=no ;;
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--enable-warnings|--enable-warnings=yes) warnings=yes ;;
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--disable-warnings|--enable-warnings=no) warnings=no ;;
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--enable-gcc-wrapper|--enable-gcc-wrapper=yes) wrapper=yes ;;
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--disable-gcc-wrapper|--enable-gcc-wrapper=no) wrapper=no ;;
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--enable-*|--disable-*|--with-*|--without-*|--*dir=*|--build=*) ;;
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--host=*|--target=*) target=${arg#*=} ;;
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-* ) echo "$0: unknown option $arg" ;;
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CC=*) CC=${arg#*=} ;;
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CFLAGS=*) CFLAGS=${arg#*=} ;;
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CPPFLAGS=*) CPPFLAGS=${arg#*=} ;;
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LDFLAGS=*) LDFLAGS=${arg#*=} ;;
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CROSS_COMPILE=*) CROSS_COMPILE=${arg#*=} ;;
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LIBCC=*) LIBCC=${arg#*=} ;;
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*=*) ;;
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*) target=$arg ;;
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esac
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done
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for i in prefix exec_prefix bindir libdir includedir syslibdir ; do
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stripdir $i
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done
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#
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# Get a temp filename we can use
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#
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i=0
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set -C
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while : ; do i=$(($i+1))
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tmpc="./conf$$-$PPID-$i.c"
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2>|/dev/null > "$tmpc" && break
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test "$i" -gt 50 && fail "$0: cannot create temporary file $tmpc"
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done
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set +C
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trap 'rm "$tmpc"' EXIT INT QUIT TERM HUP
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#
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# Find a C compiler to use
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#
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printf "checking for C compiler... "
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trycc ${CROSS_COMPILE}gcc
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trycc ${CROSS_COMPILE}c99
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trycc ${CROSS_COMPILE}cc
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printf "%s\n" "$CC"
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test -n "$CC" || { echo "$0: cannot find a C compiler" ; exit 1 ; }
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printf "checking whether C compiler works... "
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echo "typedef int x;" > "$tmpc"
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if output=$($CC $CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" 2>&1) ; then
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printf "yes\n"
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else
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printf "no; compiler output follows:\n%s\n" "$output"
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exit 1
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fi
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#
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# Need to know if the compiler is gcc to decide whether to build the
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# musl-gcc wrapper, and for critical bug detection in some gcc versions.
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#
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printf "checking whether compiler is gcc... "
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if fnmatch '*gcc\ version*' "$($CC -v 2>&1)" ; then
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cc_is_gcc=yes
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else
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cc_is_gcc=no
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fi
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echo "$cc_is_gcc"
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#
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# Only build musl-gcc wrapper if toolchain does not already target musl
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#
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if test "$wrapper" = auto ; then
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printf "checking whether to build musl-gcc wrapper... "
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if test "$cc_is_gcc" = yes ; then
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wrapper=yes
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while read line ; do
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case "$line" in */ld-musl-*) wrapper=no ;; esac
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done <<EOF
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$($CC -dumpspecs)
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EOF
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else
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wrapper=no
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fi
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echo "$wrapper"
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fi
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#
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# Find the target architecture
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#
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printf "checking target system type... "
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test -n "$target" || target=$($CC -dumpmachine 2>/dev/null) || target=unknown
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printf "%s\n" "$target"
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#
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# Convert to just ARCH
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#
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case "$target" in
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# Catch these early to simplify matching for 32-bit archs
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mips64*|powerpc64*) fail "$0: unsupported target \"$target\"" ;;
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arm*) ARCH=arm ;;
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i?86*) ARCH=i386 ;;
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x86_64-x32*|x32*|x86_64*x32) ARCH=x32 ;;
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x86_64*) ARCH=x86_64 ;;
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mips*) ARCH=mips ;;
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microblaze*) ARCH=microblaze ;;
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or1k*) ARCH=or1k ;;
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powerpc*) ARCH=powerpc ;;
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sh[1-9bel-]*|sh|superh*) ARCH=sh ;;
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unknown) fail "$0: unable to detect target arch; try $0 --target=..." ;;
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*) fail "$0: unknown or unsupported target \"$target\"" ;;
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esac
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#
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# Try to get a conforming C99 freestanding environment
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#
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tryflag CFLAGS_C99FSE -std=c99
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tryflag CFLAGS_C99FSE -nostdinc
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tryflag CFLAGS_C99FSE -ffreestanding \
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|| tryflag CFLAGS_C99FSE -fno-builtin
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tryflag CFLAGS_C99FSE -fexcess-precision=standard \
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|| { test "$ARCH" = i386 && tryflag CFLAGS_C99FSE -ffloat-store ; }
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tryflag CFLAGS_C99FSE -frounding-math
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#
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# We may use the may_alias attribute if __GNUC__ is defined, so
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# if the compiler defines __GNUC__ but does not provide it,
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# it must be defined away as part of the CFLAGS.
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#
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printf "checking whether compiler needs attribute((may_alias)) suppression... "
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cat > "$tmpc" <<EOF
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typedef int
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#ifdef __GNUC__
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__attribute__((__may_alias__))
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#endif
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x;
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EOF
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if $CC $CFLAGS_C99FSE -I./arch/$ARCH -I./include $CPPFLAGS $CFLAGS \
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-c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
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printf "no\n"
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else
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printf "yes\n"
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CFLAGS_C99FSE="$CFLAGS_C99FSE -D__may_alias__="
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fi
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#
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# Check for options that may be needed to prevent the compiler from
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# generating self-referential versions of memcpy,, memmove, memcmp,
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# and memset. Really, we should add a check to determine if this
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# option is sufficient, and if not, add a macro to cripple these
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# functions with volatile...
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#
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tryflag CFLAGS_MEMOPS -fno-tree-loop-distribute-patterns
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#
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# Enable debugging if requessted.
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#
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test "$debug" = yes && CFLAGS_AUTO=-g
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#
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# Possibly add a -O option to CFLAGS and select modules to optimize with
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# -O3 based on the status of --enable-optimize and provided CFLAGS.
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#
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printf "checking for optimization settings... "
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case "x$optimize" in
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xauto)
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if fnmatch '-O*|*\ -O*' "$CFLAGS_AUTO $CFLAGS" ; then
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printf "using provided CFLAGS\n" ;optimize=no
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else
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printf "using defaults\n" ; optimize=yes
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fi
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;;
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xsize|xnone) printf "minimize size\n" ; optimize=size ;;
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xno|x) printf "disabled\n" ; optimize=no ;;
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*) printf "custom\n" ;;
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esac
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test "$optimize" = no || tryflag CFLAGS_AUTO -Os || tryflag CFLAGS_AUTO -O2
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test "$optimize" = yes && optimize="internal,malloc,string"
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if fnmatch 'no|size' "$optimize" ; then :
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else
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printf "components to be optimized for speed:"
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while test "$optimize" ; do
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case "$optimize" in
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*,*) this=${optimize%%,*} optimize=${optimize#*,} ;;
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*) this=$optimize optimize=
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esac
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printf " $this"
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case "$this" in
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*/*.c) ;;
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*/*) this=$this*.c ;;
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*) this=$this/*.c ;;
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esac
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OPTIMIZE_GLOBS="$OPTIMIZE_GLOBS $this"
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done
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OPTIMIZE_GLOBS=${OPTIMIZE_GLOBS# }
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printf "\n"
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fi
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# Always try -pipe
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tryflag CFLAGS_AUTO -pipe
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#
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# If debugging is disabled, omit frame pointer. Modern GCC does this
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# anyway on most archs even when debugging is enabled since the frame
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# pointer is no longer needed for debugging.
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#
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if fnmatch '-g*|*\ -g*' "$CFLAGS_AUTO $CFLAGS" ; then :
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else
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tryflag CFLAGS_AUTO -fomit-frame-pointer
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fi
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#
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# Modern GCC wants to put DWARF tables (used for debugging and
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# unwinding) in the loaded part of the program where they are
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# unstrippable. These options force them back to debug sections (and
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# cause them not to get generated at all if debugging is off).
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#
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tryflag CFLAGS_AUTO -fno-unwind-tables
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tryflag CFLAGS_AUTO -fno-asynchronous-unwind-tables
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#
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# The GNU toolchain defaults to assuming unmarked files need an
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# executable stack, potentially exposing vulnerabilities in programs
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# linked with such object files. Fix this.
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#
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tryflag CFLAGS_AUTO -Wa,--noexecstack
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#
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# On x86, make sure we don't have incompatible instruction set
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# extensions enabled by default. This is bad for making static binaries.
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# We cheat and use i486 rather than i386 because i386 really does not
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# work anyway (issues with atomic ops).
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#
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if test "$ARCH" = "i386" ; then
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fnmatch '-march=*|*\ -march=*' "$CFLAGS" || tryldflag CFLAGS_AUTO -march=i486
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fnmatch '-mtune=*|*\ -mtune=*' "$CFLAGS" || tryldflag CFLAGS_AUTO -mtune=generic
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fi
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#
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# Even with -std=c99, gcc accepts some constructs which are constraint
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# violations. We want to treat these as errors regardless of whether
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# other purely stylistic warnings are enabled -- especially implicit
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# function declarations, which are a dangerous programming error.
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#
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tryflag CFLAGS_AUTO -Werror=implicit-function-declaration
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tryflag CFLAGS_AUTO -Werror=implicit-int
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tryflag CFLAGS_AUTO -Werror=pointer-sign
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tryflag CFLAGS_AUTO -Werror=pointer-arith
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if test "x$warnings" = xyes ; then
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tryflag CFLAGS_AUTO -Wall
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tryflag CFLAGS_AUTO -Wno-parentheses
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tryflag CFLAGS_AUTO -Wno-uninitialized
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tryflag CFLAGS_AUTO -Wno-missing-braces
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tryflag CFLAGS_AUTO -Wno-unused-value
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tryflag CFLAGS_AUTO -Wno-unused-but-set-variable
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tryflag CFLAGS_AUTO -Wno-unknown-pragmas
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tryflag CFLAGS_AUTO -Wno-pointer-to-int-cast
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fi
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# Some patched GCC builds have these defaults messed up...
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tryflag CFLAGS_AUTO -fno-stack-protector
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tryldflag LDFLAGS_AUTO -Wl,--hash-style=both
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test "$shared" = "no" || {
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# Disable dynamic linking if ld is broken and can't do -Bsymbolic-functions
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LDFLAGS_DUMMY=
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tryldflag LDFLAGS_DUMMY -Wl,-Bsymbolic-functions || {
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test "$shared" = "yes" && fail "$0: error: linker cannot build shared library"
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printf "warning: disabling dynamic linking support\n"
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shared=no
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}
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}
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# Find compiler runtime library
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test -z "$LIBCC" && tryldflag LIBCC -lgcc && tryldflag LIBCC -lgcc_eh
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test -z "$LIBCC" && tryldflag LIBCC -lcompiler_rt
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test -z "$LIBCC" && try_libcc=`$CC -print-file-name=libpcc.a 2>/dev/null` \
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&& tryldflag LIBCC "$try_libcc"
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printf "using compiler runtime libraries: %s\n" "$LIBCC"
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# Figure out arch variants for archs with variants
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SUBARCH=
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t="$CFLAGS_C99FSE $CPPFLAGS $CFLAGS_AUTO $CFLAGS"
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if test "$ARCH" = "x86_64" ; then
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trycppif __ILP32__ "$t" && ARCH=x32
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fi
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if test "$ARCH" = "arm" ; then
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trycppif __ARMEB__ "$t" && SUBARCH=${SUBARCH}eb
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trycppif __ARM_PCS_VFP "$t" && SUBARCH=${SUBARCH}hf
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fi
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if test "$ARCH" = "mips" ; then
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trycppif "_MIPSEL || __MIPSEL || __MIPSEL__" "$t" && SUBARCH=${SUBARCH}el
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trycppif __mips_soft_float "$t" && SUBARCH=${SUBARCH}-sf
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fi
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test "$ARCH" = "microblaze" && trycppif __MICROBLAZEEL__ "$t" \
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&& SUBARCH=${SUBARCH}el
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if test "$ARCH" = "sh" ; then
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trycppif __BIG_ENDIAN__ "$t" && SUBARCH=${SUBARCH}eb
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if trycppif "__SH_FPU_ANY__ || __SH4__" "$t" ; then
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# Some sh configurations are broken and replace double with float
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# rather than using softfloat when the fpu is present but only
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# supports single precision. Reject them.
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printf "checking whether compiler's double type is IEEE double... "
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echo 'typedef char dblcheck[(int)sizeof(double)-5];' > "$tmpc"
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if $CC $CFLAGS_C99FSE $CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
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printf "yes\n"
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else
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printf "no\n"
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fail "$0: error: compiler's floating point configuration is unsupported"
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fi
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else
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SUBARCH=${SUBARCH}-nofpu
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fi
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fi
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test "$SUBARCH" \
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&& printf "configured for %s variant: %s\n" "$ARCH" "$ARCH$SUBARCH"
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case "$ARCH$SUBARCH" in
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arm) ASMSUBARCH=el ;;
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*) ASMSUBARCH=$SUBARCH ;;
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esac
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#
|
|
# Some archs (powerpc) have different possible long double formats
|
|
# that the compiler can be configured for. The logic for whether this
|
|
# is supported is in bits/float.h; in general, it is not. We need to
|
|
# check for mismatches here or code in printf, strotd, and scanf will
|
|
# be dangerously incorrect because it depends on (1) the macros being
|
|
# correct, and (2) IEEE semantics.
|
|
#
|
|
printf "checking whether compiler's long double definition matches float.h... "
|
|
echo '#include <float.h>' > "$tmpc"
|
|
echo '#if LDBL_MANT_DIG == 53' >> "$tmpc"
|
|
echo 'typedef char ldcheck[9-(int)sizeof(long double)];' >> "$tmpc"
|
|
echo '#endif' >> "$tmpc"
|
|
if $CC $CFLAGS_C99FSE -I./arch/$ARCH -I./include $CPPFLAGS $CFLAGS \
|
|
-c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
|
|
printf "yes\n"
|
|
else
|
|
printf "no\n"
|
|
fail "$0: error: unsupported long double type"
|
|
fi
|
|
|
|
printf "creating config.mak... "
|
|
|
|
cmdline=$(quote "$0")
|
|
for i ; do cmdline="$cmdline $(quote "$i")" ; done
|
|
|
|
exec 3>&1 1>config.mak
|
|
|
|
|
|
cat << EOF
|
|
# This version of config.mak was generated by:
|
|
# $cmdline
|
|
# Any changes made here will be lost if configure is re-run
|
|
ARCH = $ARCH
|
|
SUBARCH = $SUBARCH
|
|
ASMSUBARCH = $ASMSUBARCH
|
|
prefix = $prefix
|
|
exec_prefix = $exec_prefix
|
|
bindir = $bindir
|
|
libdir = $libdir
|
|
includedir = $includedir
|
|
syslibdir = $syslibdir
|
|
CC = $CC
|
|
CFLAGS = $CFLAGS_AUTO $CFLAGS
|
|
CFLAGS_C99FSE = $CFLAGS_C99FSE
|
|
CFLAGS_MEMOPS = $CFLAGS_MEMOPS
|
|
CPPFLAGS = $CPPFLAGS
|
|
LDFLAGS = $LDFLAGS_AUTO $LDFLAGS
|
|
CROSS_COMPILE = $CROSS_COMPILE
|
|
LIBCC = $LIBCC
|
|
OPTIMIZE_GLOBS = $OPTIMIZE_GLOBS
|
|
EOF
|
|
test "x$static" = xno && echo "STATIC_LIBS ="
|
|
test "x$shared" = xno && echo "SHARED_LIBS ="
|
|
test "x$wrapper" = xno && echo "ALL_TOOLS ="
|
|
test "x$wrapper" = xno && echo "TOOL_LIBS ="
|
|
exec 1>&3 3>&-
|
|
|
|
printf "done\n"
|