[OE-core] [PATCH 1/5] oeqa/selftest/buildoptions: Improve ccache test

[Richard Purdie]

This test occisionally fails as m4 doesn't recompile, meaning the logfile test
then doesn't find mention of ccache.

To ensure m4 does recompile, clean m4 before force compiling it.

(Reading the test is confusing due to the test cleanup also involving a clean)

Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
 meta/lib/oeqa/selftest/cases/buildoptions.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/meta/lib/oeqa/selftest/cases/buildoptions.py b/meta/lib/oeqa/selftest/cases/buildoptions.py
index 9b87e7fcfcc..c3c90a0b0dc 100644
--- a/meta/lib/oeqa/selftest/cases/buildoptions.py
+++ b/meta/lib/oeqa/selftest/cases/buildoptions.py
@@ -38,6 +38,7 @@ class ImageOptionsTests(OESelftestTestCase):
         self.assertTrue(os.path.isfile(p), msg = "No ccache found (%s)" % p)
         self.write_config('INHERIT += "ccache"')
         self.add_command_to_tearDown('bitbake -c clean m4')
+        bitbake("m4 -c clean")
         bitbake("m4 -f -c compile")
         log_compile = os.path.join(get_bb_var("WORKDIR","m4"), "temp/log.do_compile")
         with open(log_compile, "r") as f:
-- 
2.19.1