config/always-no-aggressive-loop-optimizations.m4

   1 dnl #
   2 dnl # Check if gcc supports -fno-aggressive-loop-optimizations
   3 dnl #
   4 AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_NO_AGGRESSIVE_LOOP_OPTIMIZATIONS], [
   5         AC_MSG_CHECKING([for -fno-aggressive-loop-optimizations support])
   6
   7         saved_flags="$CFLAGS"
   8         CFLAGS="$CFLAGS -fno-aggressive-loop-optimizations"
   9
  10         AC_RUN_IFELSE([AC_LANG_PROGRAM([], [])], [
  11                 NO_AGGRESSIVE_LOOP_OPTIMIZATIONS=-fno-aggressive-loop-optimizations
  12                 AC_MSG_RESULT([yes])
  13         ], [
  14                 NO_AGGRESSIVE_LOOP_OPTIMIZATIONS=
  15                 AC_MSG_RESULT([no])
  16         ])
  17
  18         CFLAGS="$saved_flags"
  19         AC_SUBST([NO_AGGRESSIVE_LOOP_OPTIMIZATIONS])
  20 ])