diff options
Diffstat (limited to 'aclocal.m4')
| -rw-r--r-- | aclocal.m4 | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/aclocal.m4 b/aclocal.m4 index 141235057c..e2804cf642 100644 --- a/aclocal.m4 +++ b/aclocal.m4 @@ -1296,6 +1296,24 @@ AC_SUBST(GccIsClang) rm -f conftest.txt ]) +# FP_GCC_SUPPORTS__ATOMICS +# ------------------------ +# Does gcc support the __atomic_* family of builtins? +AC_DEFUN([FP_GCC_SUPPORTS__ATOMICS], +[ + AC_REQUIRE([AC_PROG_CC]) + AC_MSG_CHECKING([whether GCC supports __atomic_ builtins]) + echo 'int test(int *x) { int y; __atomic_load(&x, &y, __ATOMIC_SEQ_CST); return x; }' > conftest.c + if $CC -c conftest.c > /dev/null 2>&1; then + CONF_GCC_SUPPORTS__ATOMICS=YES + AC_MSG_RESULT([yes]) + else + CONF_GCC_SUPPORTS__ATOMICS=NO + AC_MSG_RESULT([no]) + fi + rm -f conftest.c conftest.o +]) + # FP_GCC_SUPPORTS_NO_PIE # ---------------------- # Does gcc support the -no-pie option? If so we should pass it to gcc when |