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update INSTALL file to reflect configure script usage

This commit is contained in:
Rich Felker 2012-05-04 23:53:50 -04:00
parent 64d2f8e82a
commit a23563024f
1 changed files with 23 additions and 13 deletions
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36
INSTALL
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@ -36,9 +36,16 @@ to compile and link programs and libraries against musl.
To install musl as an alternate libc, follow these steps:
1. Edit config.mak to select your system's CPU architecture (i386,
x86_64, or arm), installation prefix, location for the dynamic
linker, and other build preferences.
1. Configure musl's build with a command similar to:
./configure --prefix=/usr/local/musl --exec-prefix=/usr/local
Refer to ./configure --help for details on other options. You may
change the install prefix if you like, but DO NOT set it to a
location that contains your existing libraries based on another
libc such as glibc or uClibc. If you do not intend to use dynamic
linking, you may disable it at this point via --disable-shared and
cut the build time in half. If you wish to use dynamic linking but
do not have permissions to write to /lib, you will need to set an
alternate dynamic linker location via --syslibdir.
2. Run "make". Parallel build is fully supported, so you can instead
use "make -j3" or so on SMP systems if you like.
@ -46,10 +53,13 @@ To install musl as an alternate libc, follow these steps:
3. Run "make install" as a user sufficient privileges to write to the
destination.
4. Ensure that /etc/ld-musl-$ARCH.path (where $ARCH is replaced by
i386, x86_64, etc. as appropriate) contains the correct search path
for where you intend to install musl-linked shared library files.
This step can be skipped if you disabled dynamic linking.
4. Create a file named /etc/ld-musl-$ARCH.path (where $ARCH is
replaced by i386, x86_64, etc. as appropriate) containing the
correct colon-delimited search path for where you intend to install
musl-linked shared library files. If this file is missing, musl
will search the standard path, and you will encounter problems when
it attempts to load libraries linked against your host libc. Note
that this step can be skipped if you disabled dynamic linking.
After installing, you can use musl via the musl-gcc wrapper. For
example:
@ -81,8 +91,9 @@ main host system library directories.
Finally, it's worth noting that musl's include and lib directories in
the build tree are setup to be usable without installation, if
necessary. Just modify the musl-gcc wrapper's libc_prefix variable to
point to the source/build tree.
necessary. Just modify the the paths in the spec file used by musl-gcc
(it's located at $prefix/lib/musl-gcc.specs) to point to the
source/build tree.
@ -107,10 +118,9 @@ TO CONVERT IT TO BE A MUSL-BASED SYSTEM!!
the search path before you move them, or your system will break
badly and you will not be able to continue.
2. Edit musl's config.mak and set the installation prefix to the
prefix your compiler toolchain is configured to search, probably
/usr. Set ARCH to match your CPU architecture, and change any other
options as you see fit.
2. Configure musl's build with a command similar to:
./configure --prefix=/usr --disable-gcc-wrapper
Refer to ./configure --help for details on other options.
3. Run "make" to compile musl.