Bug#842513: vlc: immediate crash on launch on powerpc

[Lennart Sorensen]

Actually maybe this simpler version is better.  I think I just figured
out why libdeinterlace wasn't getting the altivec flags, which was that
it was listed as deinterlace rather than libdeinterlace.

Doing a build test of it now.

--- vlc-2.2.4.orig/configure.ac	2016-05-31 12:11:07.000000000 -0400
+++ vlc-2.2.4/configure.ac	2016-11-04 12:22:02.543265439 -0400
@@ -1422,25 +1422,24 @@
   VLC_SAVE_FLAGS
   AC_CACHE_CHECK([if \$CC groks AltiVec C extensions],
   [ac_cv_c_altivec], [
-    CFLAGS="${CFLAGS} -maltivec"
+    CFLAGS="${CFLAGS} -maltivec -fno-vectorize"
     AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
 [#include <altivec.h>]], [
 [vec_ld(0, (unsigned char *)0);]])], [
-      ac_cv_c_altivec="-maltivec"
+      ac_cv_c_altivec="-maltivec -fno-vectorize"
     ], [
       ac_cv_c_altivec="no"
     ])
   ])
-  VLC_RESTORE_FLAGS
   AS_IF([test "${ac_cv_c_altivec}" != "no"], [
     CPPFLAGS="${CPPFLAGS} ${ac_cv_c_altivec}"
     AC_DEFINE(CAN_COMPILE_C_ALTIVEC, 1, [Define to 1 if C AltiVec extensions are available.])
-    VLC_ADD_CFLAGS([libvlccore],[${ac_cv_c_altivec}])
-    ALTIVEC_CFLAGS="$ALTIVEC_FLAGS ${ac_cv_c_altivec} ${ac_cv_c_altivec_abi}"
-    VLC_ADD_CFLAGS([deinterlace],[${ac_cv_c_altivec} ${ac_cv_c_altivec_abi}])
+    ALTIVEC_CFLAGS="$ALTIVEC_CFLAGS ${ac_cv_c_altivec} ${ac_cv_c_altivec_abi}"
+    VLC_ADD_CFLAGS([libdeinterlace],[${ac_cv_c_altivec} ${ac_cv_c_altivec_abi}])
     have_altivec="yes"
   ])
   AC_CHECK_HEADERS(altivec.h)
+  VLC_RESTORE_FLAGS
 
   VLC_SAVE_FLAGS
   LDFLAGS="${LDFLAGS} -Wl,-framework,vecLib"

-- 
Len Sorensen