1 files changed, 23 insertions, 13 deletions
@@ -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
-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
@@ -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
@@ -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.