Andres Freund 6cf72879e9 Improve configure test for the sse4.2 crc instruction. ... With optimizations enabled at least one compiler, clang 3.7, optimized away the crc intrinsics knowing that the result went on unused and has no side effects. That can trigger errors in code generation when the intrinsic is used, as we chose to use the intrinsics without any additional compiler flag. Return the computed value to prevent that. With some more pedantic warning flags (-Wold-style-definition) the configure test failed to recognize the existence of _mm_crc32_u* intrinsics due to an independent warning in the test because the test turned on -Werror, but that's not actually needed here. Discussion: 20150814092039.GH4955@awork2.anarazel.de Backpatch: 9.5, where the use of crc intrinsics was integrated.		2015-08-17 11:15:46 +02:00
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ac_func_accept_argtypes.m4	Replace obsolete autoconf macros with their modern replacements.	2015-07-02 19:21:23 +03:00
ax_pthread.m4	Update ax_pthread.m4 to an experimental draft version from upstream.	2015-07-30 14:14:50 +03:00
c-compiler.m4	Improve configure test for the sse4.2 crc instruction.	2015-08-17 11:15:46 +02:00
c-library.m4	Replace obsolete autoconf macros with their modern replacements.	2015-07-02 19:21:23 +03:00
config.guess	Update config.guess and config.sub	2014-05-10 10:33:34 -04:00
config.sub	Update config.guess and config.sub	2014-05-10 10:33:34 -04:00
docbook.m4	Fix configure's search for collateindex.pl.	2012-03-22 00:46:03 -04:00
general.m4	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
install-sh	Fix install-strip on Mac OS X	2012-08-21 23:42:43 -04:00
libtool.m4	Rename AC_PROG_LD* macros to PGAC_PROG_LD*. This avoids clashes with the	2004-07-17 18:53:56 +00:00
Makefile	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
missing	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
perl.m4	Detect Windows perl linkage parameters in configure script.	2013-01-09 17:49:23 -05:00
prep_buildtree	find -path is not portable, so use grep -v instead.	2010-10-25 10:04:00 -03:00
programs.m4	Replace obsolete autoconf macros with their modern replacements.	2015-07-02 19:21:23 +03:00
python.m4	Remove configure check prohibiting threaded libpython on OpenBSD.	2015-05-26 22:14:59 -04:00
tcl.m4	Accept tcl 8.6 in configure's probe for tclsh.	2014-05-10 10:48:01 -04:00