Rich Felker
27c1eccf33
based on patch by Denys Vlasenko. the original intent for using these options was to enable linking optimizations. these are immediately available for static linking applications to libc.a, and will also be used for linking libc.so in a subsequent commit. in addition to the original motives, this change works around a whole class of toolchain bugs where the compiler generates relative address expressions using a weak symbol and the assembler "optimizes out" the relocation which should result by using the weak definition. (see gas pr 18561 and gcc pr 66609, 68178, etc. for examples.) by having different functions and data objects in their own sections, all relative address expressions are cross-section and thus cannot be resolved to constants until link time. this allows us to retain support for affected compiler/assembler versions without invasive and fragile source-level workarounds.
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/