contrib: ensure GPL is enabled if needed

Not including a package in $PKGS only prevents it from being built
as a direct VLC dependency. This patch adds a sanity check that any
GPL package is not pulled either as a dependency or a manual explicit
request.

contrib/src/a52/rules.mak

@@ -23,6 +23,7 @@ endif
 	$(MOVE)
 
 .a52: a52dec
+	$(REQUIRE_GPL)
 	$(RECONF)
 	cd $< && $(HOSTVARS) ./configure $(HOSTCONF)
 	cd $</liba52 && $(MAKE) install

contrib/src/dca/rules.mak

@@ -25,6 +25,7 @@ libdca: libdca-$(DCA_VERSION).tar.bz2 .sum-dca
 	$(MOVE)
 
 .dca: libdca
+	$(REQUIRE_GPL)
 	$(RECONF)
 	cd $< && $(HOSTVARS) CFLAGS="$(CFLAGS) -std=gnu89" ./configure $(HOSTCONF)
 	cd $< && $(MAKE) -C include install

contrib/src/dvdnav/rules.mak

@@ -25,6 +25,7 @@ dvdnav: libdvdnav-$(LIBDVDNAV_VERSION).tar.bz2 .sum-dvdnav
 DEPS_dvdnav = dvdcss dvdread
 
 .dvdnav: dvdnav .dvdcss .dvdread
+	$(REQUIRE_GPL)
 	$(RECONF) -I m4
 	cd $< && $(HOSTVARS) ./configure $(HOSTCONF) --disable-examples
 	cd $< && $(MAKE) install

contrib/src/dvdread/rules.mak

@@ -24,6 +24,7 @@ dvdread: libdvdread-$(LIBDVDREAD_VERSION).tar.bz2 .sum-dvdread
 DEPS_dvdread = dvdcss
 
 .dvdread: dvdread .dvdcss
+	$(REQUIRE_GPL)
 	$(RECONF) -I m4
 	cd $< && $(HOSTVARS) ./configure $(HOSTCONF) --with-libdvdcss
 	cd $< && $(MAKE) install

contrib/src/faad2/rules.mak

@@ -28,6 +28,7 @@ endif
 	$(MOVE)
 
 .faad2: faad2
+	$(REQUIRE_GPL)
 	$(RECONF)
 	cd $< && $(HOSTVARS) ./configure --without-drm $(HOSTCONF)
 	cd $< && sed -i.orig "s/shrext_cmds/shrext/g" libtool

contrib/src/libmpeg2/rules.mak

@@ -24,6 +24,7 @@ libmpeg2: libmpeg2-$(LIBMPEG2_VERSION).tar.gz .sum-libmpeg2
 	$(MOVE)
 
 .libmpeg2: libmpeg2
+	$(REQUIRE_GPL)
 	$(RECONF)
 	cd $< && $(HOSTVARS) ./configure $(HOSTCONF) --without-x --disable-sdl
 	cd $</libmpeg2 && $(MAKE) && $(MAKE) install

contrib/src/mad/rules.mak

@@ -34,6 +34,7 @@ endif
 	$(MOVE)
 
 .mad: libmad
+	$(REQUIRE_GPL)
 	$(RECONF)
 ifdef HAVE_IOS
 	cd $< && $(HOSTVARS) CCAS="$(AS)" CFLAGS="$(CFLAGS) -O3" ./configure $(HOSTCONF) $(MAD_CONF)

contrib/src/main.mak

@@ -353,6 +353,12 @@ RECONF = mkdir -p -- $(PREFIX)/share/aclocal && \
 CMAKE = cmake . -DCMAKE_TOOLCHAIN_FILE=$(abspath toolchain.cmake) \
 		-DCMAKE_INSTALL_PREFIX=$(PREFIX) $(CMAKE_GENERATOR)
 
+ifdef GPL
+REQUIRE_GPL =
+else
+REQUIRE_GPL = @echo "Package \"$<\" requires the GPL license." >&2; exit 1
+endif
+
 #
 # Per-package build rules
 #

contrib/src/postproc/rules.mak

@@ -121,6 +121,7 @@ postproc: postproc-$(POSTPROC_VERSION).tar.xz .sum-postproc
 	$(MOVE)
 
 .postproc: postproc
+	$(REQUIRE_GPL)
 	cd $< && $(HOSTVARS) ./configure \
 		--extra-cflags="$(EXTRA_CFLAGS)"  \
 		--extra-ldflags="$(LDFLAGS)" $(POSTPROCCONF) \

contrib/src/samplerate/rules.mak

@@ -20,6 +20,7 @@ samplerate: libsamplerate-$(SAMPLERATE_VERSION).tar.gz .sum-samplerate
 	$(MOVE)
 
 .samplerate: samplerate
+	$(REQUIRE_GPL)
 	cd $< && $(HOSTVARS) ./configure $(HOSTCONF)
 	cd $< && $(MAKE) -C src install && $(MAKE) install-data
 	touch $@

contrib/src/sidplay2/rules.mak

@@ -22,6 +22,7 @@ sidplay-libs: sidplay-libs-$(SID_VERSION).tar.gz .sum-sidplay2
 	$(MOVE)
 
 .sidplay2: sidplay-libs
+	$(REQUIRE_GPL)
 	for d in . libsidplay builders resid builders/resid-builder \
 			builders/hardsid-builder libsidutils ; \
 	do \

contrib/src/x264/rules.mak

@@ -79,11 +79,13 @@ x262: x262-git.tar.gz .sum-x262
 
 
 .x264: x264
+	$(REQUIRE_GPL)
 	cd $< && $(HOSTVARS) ./configure $(X264CONF)
 	cd $< && $(MAKE) install
 	touch $@
 
 .x26410b: x26410b
+	$(REQUIRE_GPL)
 	cd $< && $(HOSTVARS) ./configure $(X264CONF) --bit-depth=10
 	cd $< && sed -i -e 's/libx264/libx26410b/g' Makefile config.mak
 	cd $< && sed -i -e 's/x264/x26410b/g' x264.pc
@@ -93,6 +95,7 @@ x262: x262-git.tar.gz .sum-x262
 	touch $@
 
 .x262: x262
+	$(REQUIRE_GPL)
 	cd $< && sed -i -e 's/x264/x262/g' configure
 	cd $< && sed -i -e 's/x264_config/x262_config/g' *.h Makefile *.c
 	cd $< && $(HOSTVARS) ./configure $(X264CONF)

contrib/src/x265/rules.mak

@@ -34,6 +34,7 @@ endif
 	$(MOVE)
 
 .x265: x265 toolchain.cmake
+	$(REQUIRE_GPL)
 	cd $</source && $(HOSTVARS_PIC) $(CMAKE) -DENABLE_SHARED=OFF
 	cd $</source && $(MAKE) install
 	sed -e s/'[^ ]*clang_rt[^ ]*'//g -i.orig "$(PREFIX)/lib/pkgconfig/x265.pc"