Improve the checking of sed by adding some common GNU sed installation

names (gsed/gnused), checking for a basic OS X sed feature in command
line option handling, checking the actual result of the sed run against
the expected result, and placing common code for the check under
toolchain/dependencies/.  (Heikki Lindholm)

1 files changed, 38 insertions, 0 deletions

diff --git a/toolchain/dependencies/check-host-sed.sh b/toolchain/dependencies/check-host-sed.sh
new file mode 100755
index 000000000..ba99a4258
--- /dev/null
+++ b/toolchain/dependencies/check-host-sed.sh
@@ -0,0 +1,38 @@
+SEDLIST="/usr/bin/sed /bin/sed sed gnused gsed"
+
+DIFF=$(which diff)
+if ! test -x "$DIFF" ; then
+	/bin/echo -e "\n\ntesting for sed needs 'diff' on your build machine\n";
+	exit 1;
+fi;
+
+for SED in $SEDLIST
+do
+	if ! test -x $SED ; then
+		SED=$(which $SED)
+		if ! test -x "$SED" > /dev/null ; then
+			SED=""
+			continue
+		fi
+	fi
+
+	echo "HELLO" > .sedtest
+	echo "GOODBYE" > .sedtest-correct
+	$SED -i -e "s/HELLO/GOODBYE/" .sedtest >/dev/null 2>&1
+
+	if test $? != 0 ; then
+		SED=""
+	elif test -e ".sedtest-e" ; then
+		rm -f ".sedtest-e"
+		SED=""
+	elif ! $DIFF ".sedtest" ".sedtest-correct" > /dev/null ; then
+		echo "diff failed"
+		SED=""
+	fi
+
+	rm -f .sedtest .sedtest-correct
+	if [ ! -z "$SED" ] ; then
+		break
+	fi
+done
+echo $SED