https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94586
--- Comment #3 from Steve Kargl <sgk at troutmask dot apl.washington.edu> --- On Tue, Apr 14, 2020 at 07:23:32AM +0000, rguenth at gcc dot gnu.org wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94586 > > --- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- > Not all targets have a C99 math runtime. libgfortran configury tests for a > load > of C99 functions: > > # Check for C99 (and other IEEE) math functions > GCC_CHECK_MATH_FUNC([acosf]) > GCC_CHECK_MATH_FUNC([acos]) > GCC_CHECK_MATH_FUNC([acosl]) > GCC_CHECK_MATH_FUNC([acoshf]) > ... > > but fails to check for fma[lf ] (I also don't see any uses of the HAVE_* > macros defined but that's another issue. > It is 2020. If a target doesn't support C99, then building gfortran should be prohibited. The file libgfortran/intrinsics/c99_functions.c is nothing but a kludge, and I wrote a part of that file! I also note that FreeBSD does not have a complete C99 and building libstdc++ is broken because of this. Yet, I can't get a trivially stupid patch applied. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89991
