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Capture return value from __sync_add_and_fetch in the test

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__sync_add_and_fetch is treated as a built in function by the compiler if the return value is not used (as in the autoconf test), but it is treated as a regular function when the return value is used

Signed-off-by: Love Hornquist Astrand <lha@h5l.org>
This commit is contained in:
Magnus Ahltorp
2012-10-15 09:16:53 -07:00
committed by Love Hornquist Astrand
parent f25c6000fa
commit 7d4b6c3d4d
1 changed files with 1 additions and 1 deletions
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2
configure.ac
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@@ -490,7 +490,7 @@ AC_CHECK_FUNCS([ \
AC_MSG_CHECKING([checking for __sync_add_and_fetch]) AC_MSG_CHECKING([checking for __sync_add_and_fetch])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>]], AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>]],
[[unsigned int foo; __sync_add_and_fetch(&foo, 1);]])], [[unsigned int foo, bar; bar = __sync_add_and_fetch(&foo, 1);]])],
[ac_rk_have___sync_add_and_fetch=yes], [ac_rk_have___sync_add_and_fetch=no]) [ac_rk_have___sync_add_and_fetch=yes], [ac_rk_have___sync_add_and_fetch=no])
if test "$ac_rk_have___sync_add_and_fetch" = "yes" ; then if test "$ac_rk_have___sync_add_and_fetch" = "yes" ; then
AC_DEFINE_UNQUOTED(HAVE___SYNC_ADD_AND_FETCH, 1, [have __sync_add_and_fetch]) AC_DEFINE_UNQUOTED(HAVE___SYNC_ADD_AND_FETCH, 1, [have __sync_add_and_fetch])