https://github.com/spack/spack/issues/9729
https://savannah.nongnu.org/bugs/index.php?54967
http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=3b6e65f7bf674601b9419d02ce0aa633e2e882fb
--- a/builds/unix/configure     2018-12-14 22:08:30.000000000 -0600
+++ b/builds/unix/configure     2018-12-14 22:07:56.000000000 -0600
@@ -11853,7 +11853,9 @@
 # Only expand once:
 
 
-if test -n "$ac_tool_prefix"; then
+ac_fn_c_check_header_mongrel "$LINENO" "windows.h" "ac_cv_header_windows_h" "$ac_includes_default"
+if test "x$ac_cv_header_windows_h" = xyes; then :
+  if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}windres", so it can be a program name with args.
 set dummy ${ac_tool_prefix}windres; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
@@ -12022,6 +12024,9 @@
 CC=$lt_save_CC
 CFLAGS=$lt_save_CFLAGS
 
+fi
+
+
 
 
 # checks for native programs to generate building tool

