Joseph Myers 48b12ed54c 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.		2018-06-12 16:57:26 +00:00
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cmathcalls.h	Update copyright dates with scripts/update-copyrights.	2018-01-01 00:32:25 +00:00
math-finite.h	Update copyright dates with scripts/update-copyrights.	2018-01-01 00:32:25 +00:00
mathcalls-helper-functions.h	Update copyright dates with scripts/update-copyrights.	2018-01-01 00:32:25 +00:00
mathcalls-narrow.h	Add narrowing divide functions.	2018-05-17 00:40:52 +00:00
mathcalls.h	Do not use const attribute for nan functions (bug 23277).	2018-06-12 16:57:26 +00:00