[PATCH 1/1] autotools: do more cleanup when in do_configure

[Chen Qi <Qi.Chen@windriver.com>]

I met the following error when compiling some projects.

| configure: error: `LDFLAGS' has changed since the previous run:
| configure:   former value:  `-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed'
| configure:   current value: `-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed -fstack-protector-strong -Wl,-z,relro,-z,now'
[snip]
| configure: error: changes in the environment can compromise the build
| configure: error: run `make distclean' and/or `rm .././config.cache' and start over

I think when some recipe inherits autotools-brokensep, it should try to
do more cleanups before configure. So also do 'make distclean' and remove
config.cache just as what the error message told us.

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
---
 meta/classes/autotools.bbclass | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/meta/classes/autotools.bbclass b/meta/classes/autotools.bbclass
index 8768a6a..f577461 100644
--- a/meta/classes/autotools.bbclass
+++ b/meta/classes/autotools.bbclass
@@ -113,6 +113,8 @@ autotools_preconfigure() {
 				cd ${S}
 				if [ "${CLEANBROKEN}" != "1" -a \( -e Makefile -o -e makefile -o -e GNUmakefile \) ]; then
 					oe_runmake clean
+					oe_runmake distclean
+					rm -f ${B}/config.cache
 				fi
 				find ${S} -ignore_readdir_race -name \*.la -delete
 			fi
-- 
1.9.1