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| author | Joseph Myers <joseph@codesourcery.com> | 2018-06-12 16:57:26 +0000 |
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| committer | Joseph Myers <joseph@codesourcery.com> | 2018-06-12 16:57:26 +0000 |
| commit | 48b12ed54ceb605ec3566249c0387612fd9c0ced (patch) | |
| tree | 43a7f68212ad2c7597718969d1dd77e31188cee8 /math/test-fetestexceptflag.c | |
| parent | cb8f6affed52d81819037b2f5d6f3a089abb8811 (diff) | |
| download | glibc-48b12ed54ceb605ec3566249c0387612fd9c0ced.tar.gz glibc-48b12ed54ceb605ec3566249c0387612fd9c0ced.tar.xz glibc-48b12ed54ceb605ec3566249c0387612fd9c0ced.zip | |
Do not use const attribute for nan functions (bug 23277).
As in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86113 for __builtin_nan, bits/mathcalls.h wrongly declares the nan function with the __const__ attribute. Because the function reads memory pointed to by an argument, it's only pure, not const. This patch removes the incorrect attribute and adds a testcase for the bug. No __pure__ attribute is added to replace the incorrect __const__ one, since that would introduce problems when using GCC versions that have the incorrect built-in __const__ attribute and warn for the combination of those two attributes. Tested for x86_64. [BZ #23277] * math/bits/mathcalls.h [__USE_ISOC99] (nan): Do not use __const__ attribute. * math/test-nan-const.c: New file. * math/Makefile (tests): Add test-nan-const. (CFLAGS-test-nan-const.c): New variable.
Diffstat (limited to 'math/test-fetestexceptflag.c')
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