Applied a patch by Ingo, to strip the debug info from optional packages.

To note, the reduction of block size from 2048 to 1024 was not applied.
Introduced a new build variable HAIKU_STRIP_DEBUG_FROM_OPTIONAL_PACKAGES,
which will allow users to enable/disable that functionality. In the
alpha-* and nightly-* profiles, it is enabled. Reduced the image size
for alpha-* to 690M. The size for nightly images was left untouched.
+alpha3


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41812 a95241bf-73f2-0310-859d-f6bbb57e9c96

build/scripts/build_haiku_image

@@ -16,6 +16,7 @@ set -o errexit
 # dontClearImage
 # isVMwareImage
 # optionalPackageDescriptions
+# stripOptionalPackageDebugSymbols
 #
 # addattr
 # copyattr
@@ -141,6 +142,20 @@ else
 fi
 
 
+stripDebugInfo()
+{
+	file="$1"
+
+	# Determine whether the file is an ELF file by checking the ELF signature,
+	# or at least the printable characters.
+	elfMarker=`dd "if=$file" bs=1 skip=1 count=3 2> /dev/null`
+	if [ "$elfMarker" = 'ELF' ]; then
+		# make user-writable first -- some files aren't
+		chmod u+w "$file"
+		strip --strip-debug "$file"
+	fi
+}
+
 extractFile()
 {
 	# extractFile <archive> <directory>
@@ -173,6 +188,24 @@ extractFile()
 		rm $extractDir/.OptionalPackageDescription
 	fi
 
+	if [ "$stripOptionalPackageDebugSymbols" == "1" ]; then
+		# strip executables in common/bin
+		if [ -d $extractDir/common/bin ]; then
+			for file in `find $extractDir/common/bin -type f -a -perm +100 \
+					-a -size +1k`; do
+				stripDebugInfo "$file"
+			done
+		fi
+
+		# strip libraries in common/lib
+		if [ -d $extractDir/common/lib ]; then
+			for file in `find $extractDir/common/lib -type f -a -size +1k \
+					-a -name lib\*`; do
+				stripDebugInfo "$file"
+			done
+		fi
+	fi
+
 	$cp -r "${sPrefix}$extractDir/$extractedSubDir/." "${tPrefix}$targetExtractedDir"
 
 	$rmAttrs -rf "$extractDir"