Add -Qn to TARGET_CFLAGS if it's supported.

Fixes compilation on cygwin. Reported by: Andrey Borzenkov. Suggested by: Andrey Borzenkov.
ikozhukhov · Dec 24, 2013 · 57bc5d4 · 57bc5d4
1 parent 6a7957f
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diff --git a/ChangeLog b/ChangeLog
@@ -1,3 +1,11 @@
+2013-12-24  Vladimir Serbinenko  <[email protected]>
+
+	Add -Qn to TARGET_CFLAGS if it's supported.
+	Fixes compilation on cygwin.
+
+	Reported by: Andrey Borzenkov.
+	Suggested by: Andrey Borzenkov.
+
 2013-12-24  Vladimir Serbinenko  <[email protected]>
 
 	Save TARGET_CC version in modinfo.sh.

diff --git a/configure.ac b/configure.ac
@@ -913,6 +913,15 @@ if test "x$target_cpu" = xarm; then
   fi
 fi
 
+AC_CACHE_CHECK([whether option -Qn works], grub_cv_target_cc_qn, [
+  CFLAGS="$TARGET_CFLAGS -Qn -Werror"
+  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
+		    [grub_cv_target_cc_qn=yes],
+		    [grub_cv_target_cc_qn=no])])
+if test "x$grub_cv_target_cc_qn" = xyes; then
+  TARGET_CFLAGS="$TARGET_CFLAGS -Qn"
+fi
+
 #
 # Compiler features.
 #