diff --git a/configure.ac b/configure.ac
index 8888c2f..1a8c341 100644
--- a/configure.ac
+++ b/configure.ac
@@ -718,7 +718,7 @@ if test x"$platform" = xefi ; then
 fi
 if test x"$efiemu_excuse" = x ; then
   AC_CACHE_CHECK([whether options required for efiemu work], grub_cv_cc_efiemu, [
-    CFLAGS="-m64 -nostdlib -O2 -mcmodel=large -mno-red-zone"
+    CFLAGS="$TARGET_CFLAGS -m64 -nostdlib -O2 -mcmodel=large -mno-red-zone"
     AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
 		      [grub_cv_cc_efiemu=yes],
 		      [grub_cv_cc_efiemu=no])
@@ -731,8 +731,8 @@ if test x"$efiemu_excuse" = x ; then
   AC_CACHE_CHECK([for efiemu64 linking format], [grub_cv_target_cc_efiemu64_link_format], [
     grub_cv_target_cc_efiemu64_link_format=unknown
     for format in -melf_x86_64 -melf_x86_64_fbsd -melf_x86_64_obsd -melf_x86_64_haiku -arch,x86_64; do
-      CFLAGS="-m64 -nostdlib -O2 -mcmodel=large -mno-red-zone"
-      LDFLAGS="-m64 -Wl,$format -nostdlib -static"
+      CFLAGS="$TARGET_CFLAGS -m64 -nostdlib -O2 -mcmodel=large -mno-red-zone"
+      LDFLAGS="$TARGET_LDFLAGS -m64 -Wl,$format -nostdlib -static"
       AC_LINK_IFELSE([AC_LANG_PROGRAM([[
       asm (".globl start; start:");
       asm (".globl _start; _start:");