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Fix LONG_WIDTH, ULONG_WIDTH include ordering issue.

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As described in
<https://sourceware.org/ml/libc-alpha/2016-10/msg00047.html>, there is
an include ordering issue with the integer width macros in glibc's
<limits.h>, where definitions conditional on LONG_MAX do not work as
intended because when the headers are installed, this part of glibc's
<limits.h> is processed before the part of GCC's <limits.h> that will
define LONG_MAX.  This patch changes the definitions just to use
__WORDSIZE for the expansion of LONG_WIDTH and ULONG_WIDTH rather than
making those definitions conditional on LONG_MAX.

Tested for x86_64 and x86.

	* include/limits.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (LONG_WIDTH):
	Define to __WORDSIZE, not conditional on [LONG_MAX ==
	0x7fffffffL].
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (ULONG_WIDTH): Likewise.
This commit is contained in:
Joseph Myers
2016-10-04 16:17:59 +00:00
parent 22938c4103
commit ff88ee7edf
2 changed files with 12 additions and 14 deletions
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19
include/limits.h
View File

@@ -164,20 +164,11 @@
# ifndef UINT_WIDTH
# define UINT_WIDTH 32
# endif
# if LONG_MAX == 0x7fffffffL
# ifndef LONG_WIDTH
# define LONG_WIDTH 32
# endif
# ifndef ULONG_WIDTH
# define ULONG_WIDTH 32
# endif
# else
# ifndef LONG_WIDTH
# define LONG_WIDTH 64
# endif
# ifndef ULONG_WIDTH
# define ULONG_WIDTH 64
# endif
# ifndef LONG_WIDTH
# define LONG_WIDTH __WORDSIZE
# endif
# ifndef ULONG_WIDTH
# define ULONG_WIDTH __WORDSIZE
# endif
# ifndef LLONG_WIDTH
# define LLONG_WIDTH 64