If do_configure failed, output content of config.log
to configure log, it is helpful to trace the do_configure
failure on the build system which is hard to login.
(such as autobuilder)

Add a knob OUTPUT_CONFIG_LOG to control config.log output

Signed-off-by: Hongxu Jia <hongxu....@windriver.com>
---
 meta/classes/autotools.bbclass | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/meta/classes/autotools.bbclass b/meta/classes/autotools.bbclass
index 8768a6a..5fc9d0a 100644
--- a/meta/classes/autotools.bbclass
+++ b/meta/classes/autotools.bbclass
@@ -82,6 +82,7 @@ CONFIGURE_SCRIPT ?= "${AUTOTOOLS_SCRIPT_PATH}/configure"
 
 AUTOTOOLS_AUXDIR ?= "${AUTOTOOLS_SCRIPT_PATH}"
 
+OUTPUT_CONFIG_LOG ??= ""
 oe_runconf () {
        # Use relative path to avoid buildpaths in files
        cfgscript_name="`basename ${CONFIGURE_SCRIPT}`"
@@ -90,7 +91,11 @@ oe_runconf () {
                bbnote "Running $cfgscript ${CONFIGUREOPTS} ${EXTRA_OECONF} $@"
                if ! ${CACHED_CONFIGUREVARS} $cfgscript ${CONFIGUREOPTS} 
${EXTRA_OECONF} "$@"; then
                        bbnote "The following config.log files may provide 
further information."
-                       bbnote `find ${B} -ignore_readdir_race -type f -name 
config.log`
+                       config_log="`find ${B} -ignore_readdir_race -type f 
-name config.log`"
+                       bbnote "$config_log"
+                       [ -n "${OUTPUT_CONFIG_LOG}" ] && [ -e "$config_log" ] 
&& while read line; do
+                               bbnote "$line"
+                       done <"$config_log"
                        bbfatal_log "configure failed"
                fi
        else
-- 
2.7.4

-- 
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