autotools.bbclass: Enhance sed regexp to avoid extra subshell

head -n1 can be done using sed.

(From OE-Core rev: 38d50331acbc1e279449ae6b313ff0116b6c44e8)

Signed-off-by: Matthieu Crapet <Matthieu.Crapet@ingenico.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/meta/classes/autotools.bbclass b/meta/classes/autotools.bbclass
index 19edc54f6d..afca760804 100644
--- a/meta/classes/autotools.bbclass
+++ b/meta/classes/autotools.bbclass
@@ -195,7 +195,7 @@ autotools_do_configure() {
                 else
                         acpaths="${acpaths}"
                 fi
-                AUTOV=`automake --version |head -n 1 |sed "s/.* //;s/\.[0-9]\+$//"`
+                AUTOV=`automake --version | sed -e '1{s/.* //;s/\.[0-9]\+$//};q'`
                 automake --version
                 echo "AUTOV is $AUTOV"
                 if [ -d ${STAGING_DATADIR_NATIVE}/aclocal-$AUTOV ]; then