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A quick-and-simple guide to installing musl:
STEP 1: Configuration
Edit config.mak to override installation prefix, compiler options,
etc. as needed. The defaults should be okay for trying out musl with
static linking only. The only arch supported at present is i386. If
you're on an x86_64 machine, you can add -m32 to the compiler options
to build a working 32bit musl. In this case you will also need to add
-m32 in two locations in the generated tools/musl-gcc script if you
intend to use it.
DO NOT set the prefix to /, /usr, or even /usr/local unless you really
know what you're doing! You'll probably break your system such that
you'll no longer be able to compile and link programs against glibc!
This kind of setup should only be used if you're building a system
where musl is the default/primary/only libc.
The default prefix is /usr/local/musl for a reason, but some people
may prefer /opt/musl or $HOME/musl.
STEP 2: Compiling
Run "make". (GNU make is required.)
STEP 3: Installation
With appropriate privileges, run "make install".
STEP 4: Using the gcc wrapper.
musl comes with a script "musl-gcc" (installed in /usr/local/bin by
default) that can be used to compile and link C programs against musl.
It requires a version of gcc with the -wrapper option (gcc 4.x should
work). For example:
cat > hello.c <<EOF
For compiling programs that use autoconf, you'll need to configure
them with a command like this:
Be aware that (at present) libraries linked against glibc are unlikely
to be usable, and the musl-gcc wrapper inhibits search of the system
library paths in any case. You'll need to compile any prerequisite
libraries (like ncurses, glib, etc.) yourself.