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musl - an implementation of the standard library for Linux-based systems
f8db6f74b2
the old test was broken in that it would never fail on a toolchains built without dynamic linking support, leading to the wrapper script possibly being installed on compilers that do not support it. in addition, the new test is portable across compilers: the old test only worked on GCC. the new test works by testing whether the toolchain libc defines __GLIBC__: most non-musl Linux libc's do define this for compatibility even when they are not glibc, so this is a safe bet to check for musl. in addition, the compiler runtime would need to have a somewhat glibc-compatible ABI in the first place, so any non-glibc compatible libc's compiler runtime might not work. it is safer to disable these cases by default and have the user enable the wrappers manually there using --enable-wrapper if they certain it works. |
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musl libc
musl, pronounced like the word "mussel", is an MIT-licensed
implementation of the standard C library targetting the Linux syscall
API, suitable for use in a wide range of deployment environments. musl
offers efficient static and dynamic linking support, lightweight code
and low runtime overhead, strong fail-safe guarantees under correct
usage, and correctness in the sense of standards conformance and
safety. musl is built on the principle that these goals are best
achieved through simple code that is easy to understand and maintain.
The 1.1 release series for musl features coverage for all interfaces
defined in ISO C99 and POSIX 2008 base, along with a number of
non-standardized interfaces for compatibility with Linux, BSD, and
glibc functionality.
For basic installation instructions, see the included INSTALL file.
Information on full musl-targeted compiler toolchains, system
bootstrapping, and Linux distributions built on musl can be found on
the project website:
http://www.musl-libc.org/