fixincludes: Bypass solaris_math_12 on newer Solaris 11.4
Solaris 11 <math.h> long had this snippet
which badly broke libstdc++. This has long been undone using
fixincludes in
[fixincludes, v3] Don't define libstdc++-internal macros in Solaris 10+ <math.h>
https://gcc.gnu.org/ml/gcc-patches/2016-11/msg00330.html
However, the issue came up again recently when that code broke the LLVM
build, too, which unfortunately doesn't know about GCC's include-fixed
directory. The issue was reinvestigated and it turned out that the
workaround/hack is only needed for specific old versions of the Sun/Oracle
Studio compilers. So <math.h> now looks like
/* Accommodate historical C++11 -std=c++03 behavior of Studio 12.4 and 12.5 */
((__SUNPRO_CC == 0x5130) || (__SUNPRO_CC == 0x5140) || \
defined(__MATH_PREEMPTS_GLIBCXX_C99_MATH))
If this change is in place, there's no longer a need for the fixincludes
fix, so this patch bypasses it as appropriate.
Tested on Solaris 11.3 (without the fixed header) and recent 11.4 (with
the fixed header).
2022-11-01 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
fixincludes:
* inclhack.def (solaris_math_12): Add bypass.
* fixincl.x: Regenerate.