Extensible SDK fixes

index c244d93..90033ba 100644
@@ -238,11 +238,11 @@ sdk_ext_postinst() {
 	mv *-nativesdk-libc.tar.* $target_sdk_dir/`dirname ${oe_init_build_env_path}`
 
 	if [ "$prepare_buildsystem" != "no" ]; then
-	    printf "Preparing build system...\n"
-	    # dash which is /bin/sh on Ubuntu will not preserve the
-	    # current working directory when first ran, nor will it set $1 when
-	    # sourcing a script. That is why this has to look so ugly.
-	    sh -c ". buildtools/environment-setup* > preparing_build_system.log && cd $target_sdk_dir/`dirname ${oe_init_build_env_path}` && set $target_sdk_dir && . $target_sdk_dir/${oe_init_build_env_path} $target_sdk_dir >> preparing_build_system.log && bitbake ${SDK_TARGETS} >> preparing_build_system.log" || { echo "SDK preparation failed: see `pwd`/preparing_build_system.log" ; exit 1 ; }
+		printf "Preparing build system...\n"
+		# dash which is /bin/sh on Ubuntu will not preserve the
+		# current working directory when first ran, nor will it set $1 when
+		# sourcing a script. That is why this has to look so ugly.
+		sh -c ". buildtools/environment-setup* > preparing_build_system.log && cd $target_sdk_dir/`dirname ${oe_init_build_env_path}` && set $target_sdk_dir && . $target_sdk_dir/${oe_init_build_env_path} $target_sdk_dir >> preparing_build_system.log && bitbake ${SDK_TARGETS} >> preparing_build_system.log" || { echo "SDK preparation failed: see `pwd`/preparing_build_system.log" ; exit 1 ; }
 	fi
 	echo done
 }

index 90033ba..0feb3b2 100644
@@ -203,6 +203,8 @@ install_tools() {
 	install $buildtools_path ${SDK_OUTPUT}/${SDKPATH}
 
 	install ${SDK_DEPLOY}/${BUILD_ARCH}-nativesdk-libc.tar.bz2 ${SDK_OUTPUT}/${SDKPATH}
+
+	install -m 0755 ${COREBASE}/meta/files/ext-sdk-prepare.sh ${SDK_OUTPUT}/${SDKPATH}
 }
 
 # Since bitbake won't run as root it doesn't make sense to try and install

@@ -242,8 +244,9 @@ sdk_ext_postinst() {
 		# dash which is /bin/sh on Ubuntu will not preserve the
 		# current working directory when first ran, nor will it set $1 when
 		# sourcing a script. That is why this has to look so ugly.
-		sh -c ". buildtools/environment-setup* > preparing_build_system.log && cd $target_sdk_dir/`dirname ${oe_init_build_env_path}` && set $target_sdk_dir && . $target_sdk_dir/${oe_init_build_env_path} $target_sdk_dir >> preparing_build_system.log && bitbake ${SDK_TARGETS} >> preparing_build_system.log" || { echo "SDK preparation failed: see `pwd`/preparing_build_system.log" ; exit 1 ; }
+		sh -c ". buildtools/environment-setup* > preparing_build_system.log && cd $target_sdk_dir/`dirname ${oe_init_build_env_path}` && set $target_sdk_dir && . $target_sdk_dir/${oe_init_build_env_path} $target_sdk_dir >> preparing_build_system.log && $target_sdk_dir/ext-sdk-prepare.sh $target_sdk_dir '${SDK_TARGETS}' >> preparing_build_system.log 2>&1" || { echo "SDK preparation failed: see `pwd`/preparing_build_system.log" ; exit 1 ; }
 	fi
+	rm -f $target_sdk_dir/ext-sdk-prepare.sh
 	echo done
 }
 

new file mode 100644
index 0000000..a5a46be
@@ -0,0 +1,16 @@
+#!/bin/sh
+
+# Prepare the build system within the extensible SDK
+
+target_sdk_dir="$1"
+sdk_targets="$2"
+
+# Avoid actually building images during this phase
+# This is a hack, to be sure, but we really don't need to do this here
+for sdktarget in $sdk_targets ; do
+	bbappend=`recipetool newappend $target_sdk_dir/workspace $sdktarget`
+	printf 'python do_rootfs_forcevariable () {\n    bb.utils.mkdirhier(d.getVar("IMAGE_ROOTFS", True))\n}\n' > $bbappend
+	printf "Created bbappend %s\n" "$bbappend"
+done
+bitbake $sdk_targets || exit 1
+rm -rf $target_sdk_dir/workspace/appends/*

index 0feb3b2..060a44a 100644
@@ -236,6 +236,8 @@ sdk_ext_postinst() {
 	# so put it at the end of $PATH.
 	echo "export PATH=\$PATH:$target_sdk_dir/sysroots/${SDK_SYS}/${bindir_nativesdk}" >> $env_setup_script
 
+	echo "printf 'SDK environment now set up; additionally you may now run devtool to perform development tasks.\nRun devtool --help for further details.\n'" >> $env_setup_script
+
 	# For now this is where uninative.bbclass expects the tarball
 	mv *-nativesdk-libc.tar.* $target_sdk_dir/`dirname ${oe_init_build_env_path}`
 

index 060a44a..249ec36 100644
@@ -238,6 +238,9 @@ sdk_ext_postinst() {
 
 	echo "printf 'SDK environment now set up; additionally you may now run devtool to perform development tasks.\nRun devtool --help for further details.\n'" >> $env_setup_script
 
+	# Warn if trying to use external bitbake and the ext SDK together
+	echo "(which bitbake > /dev/null 2>&1 && echo 'WARNING: attempting to use the extensible SDK in an environment set up to run bitbake - this may lead to unexpected results. Please source this script in a new shell session instead.') || true" >> $env_setup_script
+
 	# For now this is where uninative.bbclass expects the tarball
 	mv *-nativesdk-libc.tar.* $target_sdk_dir/`dirname ${oe_init_build_env_path}`
 

index 2ffc2d1..568b580 100644
@@ -68,8 +68,9 @@ while getopts ":yd:nDRS" OPT; do
 	esac
 done
 
-echo "@SDK_TITLE@ installer version @SDK_VERSION@"
-echo "==========================================================="
+titlestr="@SDK_TITLE@ installer version @SDK_VERSION@"
+printf "%s\n" "$titlestr"
+printf "%${#titlestr}s\n" | tr " " "="
 
 if [ $verbose = 1 ] ; then
 	set -x