xbps-src: common/{,environment}/build_style -> common/${,environment}/build-style.

common/build-style/gnu-makefile.sh

@@ -0,0 +1,18 @@
+#
+# This helper is for templates using GNU Makefiles.
+#
+do_build() {
+	: ${make_cmd:=make}
+
+	${make_cmd} \
+		CC="$CC" CXX="$CXX" LD="$LD" AR="$AR" RANLIB="$RANLIB" \
+		CPP="$CPP" AS="$AS" OBJDUMP="$OBJDUMP" STRIP=":" \
+		${makejobs} ${make_build_args} ${make_build_target}
+}
+
+do_install() {
+	: ${make_cmd:=make}
+	: ${make_install_target:=install}
+
+	${make_cmd} STRIP=true PREFIX=/usr DESTDIR=${DESTDIR} ${make_install_args} ${make_install_target}
+}