The buildclean task should call the package build system clean
command, just implemented for Make for now.

This is meant for recipes where S == B, but can be useful as a
standalone task for other recipes too.

When S == B, set it to run before do_clean which will do what most
developers expect when calling bitbake -c clean.  For S != B, do not
add it before clean as it is not needed and may take some time.

Signed-off-by: Ola x Nilsson <[email protected]>
---
 meta/classes/externalsrc.bbclass | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/meta/classes/externalsrc.bbclass b/meta/classes/externalsrc.bbclass
index 6ec46a6..bdf23ec 100644
--- a/meta/classes/externalsrc.bbclass
+++ b/meta/classes/externalsrc.bbclass
@@ -4,7 +4,7 @@
 # Copyright (C) 2009 Chris Larson <[email protected]>
 # Released under the MIT license (see COPYING.MIT for the terms)
 #
-# externalsrc.bbclass enables use of an existing source tree, usually external 
to 
+# externalsrc.bbclass enables use of an existing source tree, usually external 
to
 # the build system to build a piece of software rather than the usual 
fetch/unpack/patch
 # process.
 #
@@ -108,6 +108,10 @@ python () {
         # We don't want the workdir to go away
         d.appendVar('RM_WORK_EXCLUDE', ' ' + d.getVar('PN'))
 
+        bb.build.addtask('do_buildclean',
+                         'do_clean' if d.getVar('S') == d.getVar('B') else 
None,
+                         None, d)
+
         # If B=S the same builddir is used even for different architectures.
         # Thus, use a shared CONFIGURESTAMPFILE and STAMP directory so that
         # change of do_configure task hash is correctly detected and stamps are
@@ -143,6 +147,17 @@ python externalsrc_compile_prefunc() {
     bb.plain('NOTE: %s: compiling from external source tree %s' % 
(d.getVar('PN'), d.getVar('EXTERNALSRC')))
 }
 
+do_buildclean[dirs] = "${S} ${B}"
+do_buildclean[nostamp] = "1"
+do_buildclean[doc] = "Call 'make clean' or equivalent in ${B}"
+externalsrc_do_buildclean() {
+       if [ -e Makefile -o -e makefile -o -e GNUmakefile ]; then
+               oe_runmake clean || die "make failed"
+       else
+               bbnote "nothing to do - no makefile found"
+       fi
+}
+
 def srctree_hash_files(d, srcdir=None):
     import shutil
     import subprocess
@@ -189,3 +204,5 @@ def srctree_configure_hash_files(d):
                 if f in search_files:
                     out_items.append('%s:True' % os.path.join(root, f))
     return ' '.join(out_items)
+
+EXPORT_FUNCTIONS do_buildclean
-- 
2.1.4

-- 
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