devtool: modify: use B=S if that is the default for the recipe

Makes the build succeed for packages which do not support separate build
directory, e.g. zlib. The same outcome could be achieved with the
--same-dir option, but, it's generally hard to tell if a random package
would need that option. The negative side effect of this patch is that
dev srctree (of some packages that build fine without this modification)
gets dirtied by build artefacts.

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
Acked-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/scripts/lib/devtool/standard.py b/scripts/lib/devtool/standard.py
index d5ded2f680ef5599bbd74ba09256c4bda2110fc8..fbac34edfd7eca42b54e95b72d9c967645ec57da 100644 (file)
--- a/scripts/lib/devtool/standard.py
+++ b/scripts/lib/devtool/standard.py
@@ -384,12 +384,19 @@ def modify(args, config, basepath, workspace):
         f.write('inherit externalsrc\n')
         f.write('# NOTE: We use pn- overrides here to avoid affecting multiple variants in the case where the recipe uses BBCLASSEXTEND\n')
         f.write('EXTERNALSRC_pn-%s = "%s"\n' % (args.recipename, srctree))
-        if args.same_dir or bb.data.inherits_class('autotools-brokensep', rd):
-            if args.same_dir:
-                logger.info('using source tree as build directory since --same-dir specified')
-            else:
-                logger.info('using source tree as build directory since original recipe inherits autotools-brokensep')
+
+        b_is_s = True
+        if args.same_dir:
+            logger.info('using source tree as build directory since --same-dir specified')
+        elif bb.data.inherits_class('autotools-brokensep', rd):
+            logger.info('using source tree as build directory since original recipe inherits autotools-brokensep')
+        elif rd.getVar('B', True) == s:
+            logger.info('using source tree as build directory since that is the default for this recipe')
+        else:
+            b_is_s = False
+        if b_is_s:
             f.write('EXTERNALSRC_BUILD_pn-%s = "%s"\n' % (args.recipename, srctree))
+
         if initial_rev:
             f.write('\n# initial_rev: %s\n' % initial_rev)
             for commit in commits: