multimedia/vlc: add ALTIVEC option, fix build on powerpc64 elfv2, add USES=localbase

Add ALTIVEC option to enable/disable AltiVec easily when needed.

Fix build with LLVM and AltiVec, altivec.h defines its own bool.

Add USES=localbase.

PR:		240537
Approved by:	linimon (mentor), multimedia (maintainer timeout)

multimedia/vlc/Makefile

@@ -26,7 +26,7 @@ BUILD_DEPENDS=	ffmpeg>=3.4.1,1:multimedia/ffmpeg \
 RUN_DEPENDS=	ffmpeg>=3.4.1,1:multimedia/ffmpeg
 
 USES=		compiler:c++11-lib desktop-file-utils gettext-tools gmake gnome \
-		iconv libtool pathfix pkgconfig tar:xz
+		iconv libtool localbase pathfix pkgconfig tar:xz
 
 # VLC git (post 2.2.4) requires C++11 support and passes the appropriate flag
 # to the compiler. Until the port is updated, we explicitly pass -std=c++11 to
@@ -58,9 +58,7 @@ CONFIGURE_ARGS=	--enable-avcodec --enable-avformat --enable-dvbpsi \
 .if defined(WITH_DEBUG)
 CONFIGURE_ARGS+=--enable-debug
 .endif
-CPPFLAGS+=	-I${LOCALBASE}/include
 CFLAGS_i386=	-fomit-frame-pointer
-LIBS+=		-L${LOCALBASE}/lib
 
 OPTIONS_DEFINE=	A52 AALIB AOM ASS AVAHI CACA CHROMECAST DAV1D DBUS DCA DOCS DVDREAD \
 		DVDNAV FAAD FLAC FLUID FREERDP FRIBIDI GME GNUTLS \
@@ -70,10 +68,14 @@ OPTIONS_DEFINE=	A52 AALIB AOM ASS AVAHI CACA CHROMECAST DAV1D DBUS DCA DOCS DVDR
 		QT5 REALRTSP RUNROOT SAMPLERATE SIDPLAY SCHROEDINGER \
 		SDL SHOUTCAST SKINS SMB SNDIO STREAM SPEEX TAGLIB THEORA \
 		TWOLAME UPNP V4L VAAPI VCD VDPAU VPX VORBIS WAYLAND X11 X264 X265 ZVBI
+OPTIONS_DEFINE_powerpc=	ALTIVEC
+OPTIONS_DEFINE_powerpc64=	ALTIVEC
 OPTIONS_DEFAULT=A52 AVAHI DAV1D DBUS DCA DVDREAD DVDNAV FAAD FLAC GNUTLS JPEG \
 		LIVEMEDIA LUA MAD MPEG2 OGG OPTIMIZED_CFLAGS \
 		OPUS PNG QT5 SAMPLERATE STREAM SPEEX TAGLIB THEORA TWOLAME \
 		V4L VAAPI VCD VDPAU VORBIS WAYLAND X11
+OPTIONS_DEFAULT_powerpc=	ALTIVEC
+OPTIONS_DEFAULT_powerpc64=	ALTIVEC
 OPTIONS_SUB=	yes
 
 AOM_DESC=	AV1 video encoding/decoding via libaom
@@ -110,6 +112,8 @@ AALIB_CONFIGURE_ENABLE=	aa
 ASS_LIB_DEPENDS=	libass.so:multimedia/libass
 ASS_CONFIGURE_ENABLE=	libass
 
+ALTIVEC_CONFIGURE_ENABLE=	altivec
+
 AOM_LIB_DEPENDS=	libaom.so:multimedia/aom
 AOM_CONFIGURE_ENABLE=	aom
 

multimedia/vlc/files/patch-modules_video__chroma_i420__yuy2.c

@@ -0,0 +1,12 @@
+--- modules/video_chroma/i420_yuy2.c.orig	2019-09-12 13:09:52 UTC
++++ modules/video_chroma/i420_yuy2.c
+@@ -37,7 +37,9 @@
+ #include <vlc_cpu.h>
+ 
+ #if defined (MODULE_NAME_IS_i420_yuy2_altivec) && defined(HAVE_ALTIVEC_H)
++#   undef bool
+ #   include <altivec.h>
++#   define bool _Bool
+ #endif
+ 
+ #include "i420_yuy2.h"

multimedia/vlc/files/patch-modules_video__filter_deinterlace_merge.c

@@ -0,0 +1,12 @@
+--- modules/video_filter/deinterlace/merge.c.orig	2019-09-12 13:33:43 UTC
++++ modules/video_filter/deinterlace/merge.c
+@@ -39,7 +39,9 @@
+ #endif
+ 
+ #ifdef HAVE_ALTIVEC_H
++#   undef bool
+ #   include <altivec.h>
++#   define bool _Bool
+ #endif
+ 
+ /*****************************************************************************