Remove some GNUism

extras/contrib/bootstrap

@@ -24,7 +24,7 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 # ***************************************************************************
 
-if test "$#" -gt "2" -o $1 = "-h" -o $1 = "--help" ; then
+if test "$#" -gt "2" -o "$1" = "-h" -o "$1" = "--help" ; then
   echo "Usage: $0 [host [distro]]" >&2
   echo "  Prepare config.mak and distro.mak file." >&2
   exit 1

extras/contrib/src/Makefile

@@ -167,7 +167,7 @@ FORCE:
 
 define EXTRACT_GZ
 	rm -rf $@ || true
-	tar xzf $< --exclude='[*?:<>\|]' 
+	gunzip $< | tar xf - --exclude='[*?:<>\|]' 
 	mv $(patsubst %.tar.gz,%,$(patsubst %.tgz,%,$(notdir $<))) $@ || true
 	touch $@
 endef