From 7a5e0891528c6563ae3f500858b5a46add9daeb5 Mon Sep 17 00:00:00 2001
From: Brian Fox <bfox@gnu.org>
Date: Fri, 24 Sep 1993 07:07:22 +0000
Subject: [PATCH] Avoid forcing the search of /usr/include before fixed include
 files by resetting C_SWITCH_X_SITE if it is "-I/usr/include".

---
 configure1.in | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/configure1.in b/configure1.in
index 48883384d15..1f2818814d3 100755
--- a/configure1.in
+++ b/configure1.in
@@ -1065,6 +1065,11 @@ esac
 [ -n "${x_libraries}" ] && LD_SWITCH_X_SITE="-L${x_libraries}"
 [ -n "${x_includes}" ] && C_SWITCH_X_SITE="-I${x_includes}"
 
+# Avoid forcing the search of /usr/include before fixed include files.
+if [ "$C_SWITCH_X_SITE" = "-I/usr/include" ]; then
+   C_SWITCH_X_SITE=" "
+fi
+
 case "${window_system}" in
   x11 )
     HAVE_X_WINDOWS=yes
-- 
2.39.5