invada-studio-plugins-lv2: honour our build flags

srcpkgs/invada-studio-plugins-lv2/template

@@ -1,9 +1,8 @@
 # Template file for 'invada-studio-plugins-lv2'
 pkgname=invada-studio-plugins-lv2
 version=1.2.0
-revision=1
+revision=2
 build_style=gnu-makefile
-make_use_env=yes
 hostmakedepends="pkg-config"
 makedepends="lv2 gtk+-devel"
 short_desc="Invada Studio LV2 plugins"
@@ -13,8 +12,16 @@ homepage="https://launchpad.net/invada-studio/"
 distfiles="https://launchpad.net/invada-studio/lv2/1.2/+download/${pkgname}_${version}-nopkg.tgz"
 checksum=c6cac7c32effc6b3052e3b017133244f385ef8e053147859d88eae6facaf7d12
 
+post_patch() {
+	find . -name Makefile -exec \
+		sed -i -e '
+			/CFLAGS/{s/CFLAGS/ALL_CFLAGS/;s/=/= $(CFLAGS)/; s/-O3//}
+			/LDFLAGS/{s/LDFLAGS/ALL_LDFLAGS/;s/=/= $(LDFLAGS)/}
+		' {} +
+}
+
 pre_build() {
-	make_build_args="CC=${CC} LD=${CC}"
+	LD=$CC
 }
 
 do_install() {