From 5e7537cf9968e39a546718692500e9c2f9443034 Mon Sep 17 00:00:00 2001
From: Nathanael Nerode <neroden@gcc.gnu.org>
Date: Sat, 21 Jun 2003 05:20:05 +0000
Subject: [PATCH] * mkconfig.sh: Add multiple inclusion guards to generated
 headers.

From-SVN: r68292
---
 gcc/ChangeLog   |  4 ++++
 gcc/mkconfig.sh | 11 +++++++++++
 2 files changed, 15 insertions(+)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index afb35b1bf94..9cdf9b3a013 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2003-06-21  Nathanael Nerode  <neroden@gcc.gnu.org>
+
+	* mkconfig.sh: Add multiple inclusion guards to generated headers.
+
 2003-06-20  Neil Booth  <neil@daikokuya.co.uk>
 
 	* c-decl.c (store_parm_decls): Make saved_warn_shadow boolean.
diff --git a/gcc/mkconfig.sh b/gcc/mkconfig.sh
index 64d118f1a99..70d9a23d92d 100644
--- a/gcc/mkconfig.sh
+++ b/gcc/mkconfig.sh
@@ -33,6 +33,14 @@ fi
 output=$1
 rm -f ${output}T
 
+# This converts a file name into header guard macro format.
+hg_sed_expr='y,abcdefghijklmnopqrstuvwxyz./,ABCDEFGHIJKLMNOPQRSTUVWXYZ__,'
+header_guard=GCC_`echo ${output} | sed -e ${hg_sed_expr}`
+
+# Add multiple inclusion protection guard, part one.
+echo "#ifndef ${header_guard}" >> ${output}T
+echo "#define ${header_guard}" >> ${output}T
+
 # Define TARGET_CPU_DEFAULT if the system wants one.
 # This substitutes for lots of *.h files.
 if [ "$TARGET_CPU_DEFAULT" != "" ]; then
@@ -85,6 +93,9 @@ EOF
     ;;
 esac
 
+# Add multiple inclusion protection guard, part two.
+echo "#endif /* ${header_guard} */" >> ${output}T
+
 # Avoid changing the actual file if possible.
 if [ -f $output ] && cmp ${output}T $output >/dev/null 2>&1; then
     echo $output is unchanged >&2
-- 
2.30.2