From ab23698c3ede84f3dda5a65b6e8169d4b2e31347 Mon Sep 17 00:00:00 2001
From: David 'Digit' Turner <digit@google.com>
Date: Wed, 24 Feb 2010 14:43:10 -0800
Subject: [PATCH] Allow the build-toolchain.sh script to apply source packages.

All you need to do is place name them like the following:

   build/tools/toolchain-patches/<subpath>/<foo>.patch

And they will be applied with 'patch -p1' into:

   <build-src>/<subpath>

This is useful to experiment with toolchain changes without having
to regenerate a whole new source package tarball each time.
---
 build/tools/build-toolchain.sh | 47 ++++++++++++++++++++++++++++++++++++++----
 1 file changed, 43 insertions(+), 4 deletions(-)

diff --git a/build/tools/build-toolchain.sh b/build/tools/build-toolchain.sh
index 80bb4e9..51f3fa7 100755
--- a/build/tools/build-toolchain.sh
+++ b/build/tools/build-toolchain.sh
@@ -389,14 +389,13 @@ download_package ()
 }
 
 # Unpack a given package in a target location
-# $1: package name
-# $2: target directory
+# $1: package name      (e.g. toolchain)
+# $2: target directory  (e.g. /tmp/foo)
 #
 unpack_package ()
 {
-    WORKSPACE=$ANDROID_NDK_ARCHIVE/$1
-    SRCDIR=$2
     SRCPKG=`var_value PKG_$1`
+    SRCDIR=$2
     if ! timestamp_check $1 unpack; then
         echo "Unpack  : $1 sources"
         echo "          from $SRCPKG"
@@ -413,6 +412,45 @@ unpack_package ()
             exit 1
         fi
         timestamp_set   $1 unpack
+        timestamp_force $1 patch
+    fi
+}
+
+# Patch a given package at a target location
+# $1: package name      (e.g. toolchain)
+# $2: target directory  (e.g. /tmp/foo)
+# $3: patch directory   (e.g. build/tools/toolchain-patches)
+#
+# The rationale here is that anything named like $3/<subpath>/<foo>.patch
+# will be applied with "patch -p1" under $2/<subpath>
+#
+# Patches are listed and applied in alphanumerical order of their names
+# as returned by 'find'. Consider using numbered prefixes like the patch
+# files generated by "git format-patch" are named.
+#
+patch_package ()
+{
+    SRCPKG=`var_value PKG_$1`
+    SRCDIR=$2
+    if ! timestamp_check $1 patch; then
+        PATCH_FILES=`(cd $3 && find . -name "*.patch") 2> /dev/null`
+        if [ -z "$PATCH_FILES" ] ; then
+            echo "Patch   : none provided"
+            return
+        fi
+        for PATCH in $PATCH_FILES; do
+            echo "Patch   : $1 sources"
+            echo "          from $PATCH"
+            echo "          into $SRCDIR"
+            PATCHDIR=`dirname $PATCH`
+            PATCHNAME=`basename $PATCH`
+            cd $SRCDIR/$PATCHDIR && patch -p1 < $3/$PATCH
+            if [ $? != 0 ] ; then
+                echo "Patch failure !! Please check toolchain package !"
+                exit 1
+            fi
+        done
+        timestamp_set   $1 patch
         timestamp_force $1 configure
     fi
 }
@@ -443,6 +481,7 @@ else
 fi
 
 unpack_package toolchain $ANDROID_TOOLCHAIN_SRC
+patch_package  toolchain $ANDROID_TOOLCHAIN_SRC $ANDROID_NDK_ROOT/build/tools/toolchain-patches
 
 # remove all info files from the unpacked toolchain sources
 # they create countless little problems during the build
-- 
2.11.0