[CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
-flto -ffat-lto-objects])],
[AC_MSG_RESULT([skipping -flto, optimization not enabled])])
AC_SUBST([OUR_CFLAGS], "$with_cflags $sanitizer_cflags")
[CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
-flto -ffat-lto-objects])],
[AC_MSG_RESULT([skipping -flto, optimization not enabled])])
AC_SUBST([OUR_CFLAGS], "$with_cflags $sanitizer_cflags")
[CC_CHECK_FLAGS_APPEND([with_cppflags], [CPPFLAGS], [\
-Wp,-D_FORTIFY_SOURCE=2])],
[AC_MSG_RESULT([skipping -D_FORTIFY_SOURCE, optimization not enabled])])
[CC_CHECK_FLAGS_APPEND([with_cppflags], [CPPFLAGS], [\
-Wp,-D_FORTIFY_SOURCE=2])],
[AC_MSG_RESULT([skipping -D_FORTIFY_SOURCE, optimization not enabled])])
#include <linux/if_tunnel.h>
#include <linux/if_link.h>
#include <linux/if_bridge.h>
#include <linux/if_tunnel.h>
#include <linux/if_link.h>
#include <linux/if_bridge.h>
[AS_FOR([DIR], [EFI_LDS_DIR], ["${efiroot}/gnuefi" "${efiroot}"],
[AS_FOR([DIR], [EFI_LDS_DIR], ["${efiroot}/gnuefi" "${efiroot}"],
[have_efi_lds=yes && break])])])
AS_IF([test "x$have_efi_lds" = xyes],
[AC_SUBST([EFI_LDS_DIR])],
[have_efi_lds=yes && break])])])
AS_IF([test "x$have_efi_lds" = xyes],
[AC_SUBST([EFI_LDS_DIR])],