| dnl # |
| dnl # If -latomic exists and atomic.c doesn't link without it, |
| dnl # it's needed for __atomic intrinsics. |
| dnl # |
| AC_DEFUN([ZFS_AC_CONFIG_USER_LIBATOMIC], [ |
| AC_MSG_CHECKING([whether -latomic is required]) |
| |
| saved_libs="$LIBS" |
| LIBS="$LIBS -latomic" |
| LIBATOMIC_LIBS="" |
| |
| AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [ |
| LIBS="$saved_libs" |
| saved_cflags="$CFLAGS" |
| CFLAGS="$CFLAGS -isystem lib/libspl/include" |
| AC_LINK_IFELSE([AC_LANG_PROGRAM([#include "lib/libspl/atomic.c"], [])], [], [LIBATOMIC_LIBS="-latomic"]) |
| CFLAGS="$saved_cflags" |
| ]) |
| |
| if test -n "$LIBATOMIC_LIBS"; then |
| AC_MSG_RESULT([yes]) |
| else |
| AC_MSG_RESULT([no]) |
| fi |
| |
| LIBS="$saved_libs" |
| AC_SUBST([LIBATOMIC_LIBS]) |
| ]) |
