On Mon, 26 Oct 2015, Szabolcs Nagy wrote: > > FLT_ROUNDS is an ordinary compiler bug (bug 30569), should be fixable > > reasonably straightforwardly as outlined at > > <https://gcc.gnu.org/ml/gcc/2013-11/msg00317.html>, probably within say a > > week's work if most architecture-specific changes are left to architecture > > maintainers. > > musl tries to support old compilers in general (it can be built > with gcc 3.x, and it should be possible to use with a wider range > of compilers with reasonably consistent semantics, so fixing that > bug in gcc does not help much.)
Well, the general expectation in the GNU system is that GCC and glibc may work around each other's issues if the one doing the working around is responsible for the interface that needs the workaround - but also that interfaces required for freestanding implementations are GCC's responsibility while interfaces involving library functions are the C library's responsibility. GCC fixincludes doesn't try to fix library issues not relevant for GCC and its tests unless they actually break use of a header with GCC, and glibc doesn't try to fix issues with headers provided by GCC. (There may be the odd deviation from that starting point - GCC provides stdatomic.h because it's so closely linked to the compiler despite not being required of freestanding implementations, and GCC would not start to provide libm in future if adopting TS 18661-1 despite it requiring more library functionality for freestanding implementations.) -- Joseph S. Myers jos...@codesourcery.com
