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add configure checks for -latomic. Helps with #2828

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alandekok committed Aug 1, 2019
1 parent e647c26 commit 5a7df325116a3c2e995e5b37d8f77665336f1caf
Showing with 65 additions and 0 deletions.
  1. +60 −0 configure
  2. +5 −0 configure.ac
@@ -13068,6 +13068,66 @@ $as_echo "#define HAVE_BINSAFE_REGEX 1" >>confdefs.h
fi
fi

#
# Some platforms require an explicit -latomic
#
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing __atomic_load_4" >&5
$as_echo_n "checking for library containing __atomic_load_4... " >&6; }
if ${ac_cv_search___atomic_load_4+:} false; then :
$as_echo_n "(cached) " >&6
else
ac_func_search_save_LIBS=$LIBS
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
/* Override any GCC internal prototype to avoid an error.
Use char because int might match the return type of a GCC
builtin and then its argument prototype would still apply. */
#ifdef __cplusplus
extern "C"
#endif
char __atomic_load_4 ();
int
main ()
{
return __atomic_load_4 ();
;
return 0;
}
_ACEOF
for ac_lib in '' atomic; do
if test -z "$ac_lib"; then
ac_res="none required"
else
ac_res=-l$ac_lib
LIBS="-l$ac_lib $ac_func_search_save_LIBS"
fi
if ac_fn_c_try_link "$LINENO"; then :
ac_cv_search___atomic_load_4=$ac_res
fi
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext
if ${ac_cv_search___atomic_load_4+:} false; then :
break
fi
done
if ${ac_cv_search___atomic_load_4+:} false; then :

else
ac_cv_search___atomic_load_4=no
fi
rm conftest.$ac_ext
LIBS=$ac_func_search_save_LIBS
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search___atomic_load_4" >&5
$as_echo "$ac_cv_search___atomic_load_4" >&6; }
ac_res=$ac_cv_search___atomic_load_4
if test "$ac_res" != no; then :
test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"

fi


if test "x$REGEX" = "xyes"; then

$as_echo "#define HAVE_REGEX 1" >>confdefs.h
@@ -2033,6 +2033,11 @@ if test "x$REGEX" = "x"; then
fi
fi

#
# Some platforms require an explicit -latomic
#
AC_SEARCH_LIBS([__atomic_load_4], [atomic])

if test "x$REGEX" = "xyes"; then
AC_DEFINE(HAVE_REGEX, 1, [Define if we have any regular expression library])
fi

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