4.8. musl-1.2.5¶

The musl package contains the main C library. This library provides the basic routines for allocating memory, searching directories, opening and closing files, reading and writing files, string handling, pattern matching, arithmetic, and so on.

4.8.1. Installation of musl¶

Configure the package:

./configure \
  CROSS_COMPILE=${CLFS_TARGET}- \
  --prefix=/ \
  --target=${CLFS_TARGET}

Compile the package:

make

Install the package:

DESTDIR=${CLFS}/cross-tools/${CLFS_TARGET} make install

4.8.2 Installation of libssp_nonshared.a¶

Create a C file that includes a function required to build programs, like dropbear, that require stack protection.

cat > __stack_chk_fail_local.c << "EOF"
extern void __stack_chk_fail(void);
void __attribute__((visibility ("hidden"))) __stack_chk_fail_local(void) { __stack_chk_fail(); }
EOF

Compile the code:

${CLFS_TARGET}-gcc -fpie -c __stack_chk_fail_local.c -o __stack_chk_fail_local.o
${CLFS_TARGET}-ar r libssp_nonshared.a __stack_chk_fail_local.o

Copy the library:

cp libssp_nonshared.a ${CLFS}/cross-tools/${CLFS_TARGET}/lib/

4.8.3. Contents of musl¶

Installed Programs:   ld-musl.so.0
Installed Libraries:  libc.so.0, libcrypt.so.0, libdl.so.0, libm.so.0, libpthread.so.0, librt.so.0
Installed Headers:    To be written…

Short Descriptions¶

ld-musl: The musl dynamic linker / loader
libc: The C library
libcrypt: The cryptographic library
libdl: The musl dynamic linker / loader library
libm: The math library
libpthread: The POSIX thread library
librt: The clock and timer library