Fix build failure and make mplayer work properly on NetBSD/arm:

- workaround name conflict with system header <arm/bswap.h> in libavutils
   by subst.mk replacement
 - explicitly disable armv5te, armv6, and armv6t2 options that are enabled
   by autodetect code in configure but cause illegal instruction errors
   on StrongARM and XScale machines

Tested on NetBSD/hpcarm (WS011SH) and NetBSD/shark (Funai's DNARD) 5.99.38.

multimedia/mplayer-share/Makefile.common

@@ -1,4 +1,4 @@
-# $NetBSD: Makefile.common,v 1.44 2010/01/03 23:42:44 ahoka Exp $
+# $NetBSD: Makefile.common,v 1.45 2010/08/12 15:28:46 tsutsui Exp $
 # used by multimedia/gmplayer/Makefile
 # used by multimedia/mencoder/Makefile
 # used by multimedia/mplayer/Makefile
@@ -61,4 +61,19 @@ CONFIGURE_ENV+=		TMPDIR=${WRKDIR:Q}
 CONFIGURE_ARGS+=        --enable-big-endian
 .endif
 
+.if !empty(MACHINE_PLATFORM:MNetBSD-*-arm)
+# Avoid crash with system include file:
+pre-patch:
+	mv ${WRKSRC}/libavutil/arm/bswap.h ${WRKSRC}/libavutil/arm/avbswap.h
+
+SUBST_CLASSES+=			arm_bswap
+SUBST_STAGE.arm_bswap=		pre-configure
+SUBST_FILES.arm_bswap=		libavutil/bswap.h
+SUBST_SED.arm_bswap=		-e s,\"arm/bswap.h\",\"arm/avbswap.h\",g
+SUBST_MESSAGE.arm_bswap=	Fixing "arm/bswap.h" conflict in libavutil
+
+# autodetect code enables these options on NetBSD/arm but it should not
+CONFIGURE_ARGS+=        --disable-armv5te --disable-armv6 --disable-armv6t2
+.endif
+
 .include "../../multimedia/mplayer-share/options.mk"