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r246237 - in /branches/ARM/sve-branch/libstdc++...
- From: rsandifo at gcc dot gnu dot org
- To: libstdc++-cvs at gcc dot gnu dot org
- Date: Fri, 17 Mar 2017 17:27:59 -0000
- Subject: r246237 - in /branches/ARM/sve-branch/libstdc++...
Author: rsandifo
Date: Fri Mar 17 17:27:58 2017
New Revision: 246237
URL: https://gcc.gnu.org/viewcvs?rev=246237&root=gcc&view=rev
Log:
[libstdc++-v3] Fix detection of obsolete isnan
libstdc++-v3 configure checks whether old glibc inline definitions
of isnan would conflict with the libstdc++-v3 definitions and
works around them if so. But if g++ 6.x build A is used to build
another g++ 6.x B, the configure step for B will pick up the math.h
installed alongside A instead of the glibc version. configure will
then assume that the workaround isn't necessary, leaving B with a
broken cmath.
isinf already worked around this. This patch extends the same fix
to isnan. (Thanks to George for the fix.)
libstdc++-v3/
2017-03-10 George Lander <george.lander@arm.com>
* acinclude.m4 (glibcxx_cv_obsolete_isnan): Define
_GLIBCXX_INCLUDE_NEXT_C_HEADERS before including math.h.
* configure: Regenerate.
Modified:
branches/ARM/sve-branch/libstdc++-v3/acinclude.m4
branches/ARM/sve-branch/libstdc++-v3/configure