From 016e02cfe7714338aeff43c2c451e38d8c603489 Mon Sep 17 00:00:00 2001
From: Ben Pfaff <blp@nicira.com>
Date: Fri, 17 Oct 2008 16:15:34 -0700
Subject: [PATCH] Avoid leaving Makefile.am and configure.ac slightly modified
 by boot.sh.

(This turned out to be more annoying than I expected.)
---
 .gitignore   |  2 ++
 Makefile.am  |  2 +-
 boot.sh      | 23 +++++------------------
 configure.ac |  2 +-
 4 files changed, 9 insertions(+), 20 deletions(-)

diff --git a/.gitignore b/.gitignore
index fb110376..be6113cd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -39,4 +39,6 @@
 Module.symvers
 TAGS
 cscope.*
+ext.m4
+ext.mk
 tags
diff --git a/Makefile.am b/Makefile.am
index b1221fd9..26ac9eab 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -60,4 +60,4 @@ include tests/automake.mk
 include include/automake.mk
 include third-party/automake.mk
 include debian/automake.mk
-include ext/automake.mk
+include ext.mk
diff --git a/boot.sh b/boot.sh
index 7c674c50..6a5ac53d 100755
--- a/boot.sh
+++ b/boot.sh
@@ -20,35 +20,22 @@ EOF
     esac
 done
 
-
 # Generate list of files in debian/ to distribute.
 (echo '# Automatically generated by boot.sh (from Git tree).' &&
  echo 'EXTRA_DIST += \' &&
  git ls-files debian | grep -v '^debian/\.gitignore$' | 
  sed -e 's/\(.*\)/	\1 \\/' -e '$s/ \\//') > debian/automake.mk
 
-# Find the "include ext/automake.mk" line in Makefile.am and comment
-# it out or in according to whether ext is available, and similarly
-# for "m4_include(ext/configure.m4)" in configure.ac.
-subst() {
-    perl -pe "$1" < "$2" > "$2.tmp"
-    if cmp -s "$2.tmp" "$2"; then
-	rm "$2.tmp"
-    else
-	mv "$2.tmp" "$2"
-    fi
-}
+# Enable or disable ext.
 if test "$have_ext" = yes; then
     echo 'Enabling openflowext...'
-    OC='#'
-    NC=
+    echo 'include ext/automake.mk' > ext.mk
+    echo 'm4_include([ext/configure.m4])' > ext.m4
 else
     echo 'Disabling openflowext...'
-    OC=
-    NC='#'
+    echo '# This file intentionally left blank.' > ext.mk
+    echo '# This file intentionally left blank.' > ext.m4
 fi
-subst "s|^$OC(include ext/automake\\.mk)\$|$NC\$1|" Makefile.am
-subst "s|^$OC(m4_include\\(ext/configure\.m4\\))\$|$NC\$1|" configure.ac
 
 # Bootstrap configure system from .ac/.am files
 autoreconf --install -I config --force
diff --git a/configure.ac b/configure.ac
index 9cca0597..f4e923a9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -63,7 +63,7 @@ OFP_CHECK_DPKG_BUILDPACKAGE
 CFLAGS="$CFLAGS -Wall -Wno-sign-compare -Wpointer-arith -Wdeclaration-after-statement"
 
 OFP_ENABLE_EXT
-m4_include(ext/configure.m4)
+m4_include([ext.m4])
 
 AC_CONFIG_FILES([Makefile 
 datapath/Makefile 
-- 
2.30.2