populate_sdk: enable basic multilib support

In order to enable basic multilib support for the export of an SDK
image, a number of minor changes had to be made:

The value of MULTIMACH_TARGET_SYS needs to be variable.  This way we
can define the value to the appropriate multilib.  (Also in some cases
the default PACKAGE_ARCH is set to MACHINE_ARCH which is incorrect for
the SDK.)  Add a companion REAL_MULTIMACH_TARGET_SYS, based on code
from meta-environment, to allow for this.

We have to convert the do_populate_sdk into a python call, and then
break up the previous items into three parts.
  * Image construction
  * Setup of environment files
  * Generation of the tarball

Then we can iterate over the multilibs to populate the environment files.

Finally, matching changes were needed in the toolchain-scripts file.  And
what I presume is an optimization of immediate evaluation for
TOOLCHAIN_CONFIGSITE_NOCACHE and ..._SYSROOTCACHE needed to be done at
runtime, otherwise the wrong values may be used.

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>

1 files changed, 10 insertions, 6 deletions

diff --git a/meta/classes/toolchain-scripts.bbclass b/meta/classes/toolchain-scripts.bbclass
index 2099c4def8..bedcd612fe 100644
--- a/meta/classes/toolchain-scripts.bbclass
+++ b/meta/classes/toolchain-scripts.bbclass
@@ -1,15 +1,19 @@
 inherit siteinfo
 
+# We want to be able to change the value of MULTIMACH_TARGET_SYS, because it
+# doesn't always match our expectations... but we default to the stock value
+REAL_MULTIMACH_TARGET_SYS ?= "${MULTIMACH_TARGET_SYS}"
+
 # This function creates an environment-setup-script for use in a deployable SDK
 toolchain_create_sdk_env_script () {
 	# Create environment setup script
-	script=${SDK_OUTPUT}/${SDKPATH}/environment-setup-${MULTIMACH_TARGET_SYS}
+	script=${1:-${SDK_OUTPUT}/${SDKPATH}/environment-setup-${REAL_MULTIMACH_TARGET_SYS}}
 	rm -f $script
 	touch $script
-	echo 'export PATH=${SDKPATHNATIVE}${bindir_nativesdk}:${SDKPATHNATIVE}${bindir_nativesdk}/${MULTIMACH_TARGET_SYS}:$PATH' >> $script
+	echo 'export PATH=${SDKPATHNATIVE}${bindir_nativesdk}:${SDKPATHNATIVE}${bindir_nativesdk}/${REAL_MULTIMACH_TARGET_SYS}:$PATH' >> $script
 	echo 'export PKG_CONFIG_SYSROOT_DIR=${SDKTARGETSYSROOT}' >> $script
 	echo 'export PKG_CONFIG_PATH=${SDKTARGETSYSROOT}${libdir}/pkgconfig' >> $script
-	echo 'export CONFIG_SITE=${SDKPATH}/site-config-${MULTIMACH_TARGET_SYS}' >> $script
+	echo 'export CONFIG_SITE=${SDKPATH}/site-config-${REAL_MULTIMACH_TARGET_SYS}' >> $script
 	echo 'export CC=${TARGET_PREFIX}gcc' >> $script
 	echo 'export CXX=${TARGET_PREFIX}g++' >> $script
 	echo 'export GDB=${TARGET_PREFIX}gdb' >> $script
@@ -36,7 +40,7 @@ toolchain_create_sdk_env_script () {
 # This function creates an environment-setup-script in the TMPDIR which enables
 # a OE-core IDE to integrate with the build tree
 toolchain_create_tree_env_script () {
-	script=${TMPDIR}/environment-setup-${MULTIMACH_TARGET_SYS}
+	script=${TMPDIR}/environment-setup-${REAL_MULTIMACH_TARGET_SYS}
 	rm -f $script
 	touch $script
 	echo 'export PATH=${PATH}' >> $script
@@ -103,8 +107,8 @@ toolchain_create_sdk_env_script_for_installer () {
 }
 
 #we get the cached site config in the runtime
-TOOLCHAIN_CONFIGSITE_NOCACHE := "${@siteinfo_get_files(d, True)}"
-TOOLCHAIN_CONFIGSITE_SYSROOTCACHE := "${STAGING_DATADIR}/${TARGET_SYS}_config_site.d"
+TOOLCHAIN_CONFIGSITE_NOCACHE = "${@siteinfo_get_files(d, True)}"
+TOOLCHAIN_CONFIGSITE_SYSROOTCACHE = "${STAGING_DATADIR}/${TARGET_SYS}_config_site.d"
 TOOLCHAIN_NEED_CONFIGSITE_CACHE = "${TCLIBC} ncurses"
 
 #This function create a site config file