[OE-core] [RFC][PATCH 1/6] build-mode.bbclass: distro-wide debug-build mode

[Patrick Ohly]

Some packages (for example, kmod) have built-time configure options
for additional debugging support. Similar to manpages.bbclass, this
new class turns the new "debug-build" DISTRO_FEATURE into "debug" and
"logging" PACKAGECONFIGs if the current recipe has those.

Another usage will be to mark images when undesired distro features
like "debug-build" were used. This protects against accidentally using
such an image as production image on a device.

Signed-off-by: Patrick Ohly <patrick.ohly at intel.com>
---
 meta/classes/build-mode.bbclass | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 meta/classes/build-mode.bbclass

diff --git a/meta/classes/build-mode.bbclass b/meta/classes/build-mode.bbclass
new file mode 100644
index 0000000..e5564dd
--- /dev/null
+++ b/meta/classes/build-mode.bbclass
@@ -0,0 +1,16 @@
+# Enable additional logging and debugging features that are unsuitable
+# for production images when building in "debug" mode. "kmod" is
+# an example of a recipe which has both "debug" and "logging"
+# PACKAGECONFIGs.
+#
+# This distro feature is not very flexible. More useful in practice
+# is the IMAGE_MODE in image.bbclass, which allows building production
+# and development images in the same build configuration.
+PACKAGECONFIG_append_class-target = "${@ \
+    (' ' + ' '.join(set(d.getVarFlags('PACKAGECONFIG').keys()).intersection(('debug', 'logging')))) if \
+    bb.utils.contains('DISTRO_FEATURES', 'debug-build', True, False, d) \
+    else ''}"
+
+# The following DISTRO_FEATURES have to be considered too dangerous
+# and/or unsuitable for use in production.
+DISTRO_FEATURES_NON_PRODUCTION ??= "debug-build"
-- 
git-series 0.9.1