video_output: Makefile.am: fix link for glconv_cvpx on ios

There were no LDFLAGS for iOS/tvOS and vt_utils were not compiled but
linking worked because videotoolbox was linked in the final static
library archive.

Manual backport from commit 1b9a3f4687
since interop_cvpx doesn't exist in 3.0.x and the code was pretty
different.

modules/video_output/Makefile.am

@@ -20,7 +20,10 @@ endif
 
 libglconv_cvpx_plugin_la_SOURCES = video_output/opengl/converter_cvpx.c \
 	video_output/opengl/converter.h
+libglconv_cvpx_plugin_la_SOURCES += codec/vt_utils.c codec/vt_utils.h
 libglconv_cvpx_plugin_la_LDFLAGS = $(AM_LDFLAGS) -rpath '$(voutdir)'
+libglconv_cvpx_plugin_la_LDFLAGS += -Wl,-framework,IOSurface \
+	-Wl,-framework,Foundation,-framework,CoreVideo
 
 if HAVE_OSX
 libvout_macosx_plugin_la_SOURCES = video_output/macosx.m $(OPENGL_COMMONSOURCES)
@@ -35,21 +38,23 @@ libcaopengllayer_plugin_la_LIBADD = $(OPENGL_COMMONLIBS)
 libcaopengllayer_plugin_la_LDFLAGS = $(AM_LDFLAGS) -rpath '$(voutdir)' \
 	-Wl,-framework,OpenGL,-framework,Cocoa,-framework,QuartzCore
 
-libglconv_cvpx_plugin_la_SOURCES += codec/vt_utils.c codec/vt_utils.h
-libglconv_cvpx_plugin_la_LDFLAGS += -Wl,-framework,IOSurface \
-	-Wl,-framework,Foundation,-framework,CoreVideo,-framework,OpenGL
 vout_LTLIBRARIES += libvout_macosx_plugin.la libcaopengllayer_plugin.la \
 	libglconv_cvpx_plugin.la
 endif
-if HAVE_IOS
+if HAVE_OSX
+libglconv_cvpx_plugin_la_CFLAGS = $(AM_CFLAGS)
+libglconv_cvpx_plugin_la_LDFLAGS += -Wl,-framework,OpenGL
+else
 libglconv_cvpx_plugin_la_CFLAGS = $(AM_CFLAGS) -DUSE_OPENGL_ES2
+libglconv_cvpx_plugin_la_LDFLAGS += -Wl,-framework,OpenGLES
 endif
 
 libvout_ios_plugin_la_SOURCES = video_output/ios.m $(OPENGL_COMMONSOURCES)
 libvout_ios_plugin_la_CFLAGS = $(AM_CFLAGS) $(OPENGL_COMMONCLFAGS) -DUSE_OPENGL_ES2
 libvout_ios_plugin_la_LIBADD = $(OPENGL_COMMONLIBS)
 libvout_ios_plugin_la_LDFLAGS = $(AM_LDFLAGS) -rpath '$(voutdir)' \
-	-Wl,-framework,OpenGLES,-framework,QuartzCore,-framework,UIKit
+	-Wl,-framework,OpenGLES,-framework,QuartzCore,-framework,UIKit \
+	-Wl,-framework,Foundation
 if HAVE_IOS
 vout_LTLIBRARIES += libvout_ios_plugin.la libglconv_cvpx_plugin.la
 endif