autotools: Use make clean for builds not supporting B != S

If the build doesn't support B != S, we can try running "make clean" instead
to try and clean up previous objects if the hash for the task has changed.

This tries to ensure that when variables like ${baselib} change, the changes are
correctly accounted for.

(From OE-Core rev: c2f761e2010857e2a2aad1dccf06ec39d15c1c86)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/meta/classes/autotools.bbclass b/meta/classes/autotools.bbclass
index 6b99bddd5d..bed8a835d4 100644
--- a/meta/classes/autotools.bbclass
+++ b/meta/classes/autotools.bbclass
@@ -109,7 +109,11 @@ autotools_preconfigure() {
                         else
                                 # At least remove the .la files since automake won't automatically
                                 # regenerate them even if CFLAGS/LDFLAGS are different
-                                cd ${S}; find ${S} -name \*.la -delete
+                                cd ${S}
+                                if [ -e Makefile -o -e makefile -o -e GNUmakefile ]; then
+                                        ${MAKE} clean
+                                fi
+                                find ${S} -name \*.la -delete
                         fi
                 fi
         fi