[SCM] ffmpeg/master: Disable broken optimizations on ppc64el to fix FTBFS

[jcowgill at users.alioth.debian.org]

The following commit has been merged in the master branch:
commit 4b7b2d27de9ea451ee4f0c84b87a8a9d01853789
Author: James Cowgill <jcowgill at debian.org>
Date:   Wed Aug 16 10:23:35 2017 +0100

    Disable broken optimizations on ppc64el to fix FTBFS
    
    See: #871565

diff --git a/debian/patches/0006-disable-ppc-scalarproduct.patch b/debian/patches/0006-disable-ppc-scalarproduct.patch
new file mode 100644
index 0000000..47faca7
--- /dev/null
+++ b/debian/patches/0006-disable-ppc-scalarproduct.patch
@@ -0,0 +1,29 @@
+Description: Disable broken scalarproduct optimizations on PowerPC
+ GCC 7 miscompiles these functions causing various tests to fail on ppc64el.
+ Disable them until the toolchain is fixed.
+ .
+ Toolchain bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81833
+Author: James Cowgill <jcowgill at debian.org>
+Bug-Debian: https://bugs.debian.org/871565
+---
+This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
+--- a/libavcodec/ppc/audiodsp.c
++++ b/libavcodec/ppc/audiodsp.c
+@@ -88,17 +88,4 @@ static int32_t scalarproduct_int16_vsx(c
+ 
+ av_cold void ff_audiodsp_init_ppc(AudioDSPContext *c)
+ {
+-#if HAVE_ALTIVEC
+-    if (!PPC_ALTIVEC(av_get_cpu_flags()))
+-        return;
+-
+-    c->scalarproduct_int16 = scalarproduct_int16_altivec;
+-#endif /* HAVE_ALTIVEC */
+-
+-#if HAVE_VSX
+-    if (!PPC_VSX(av_get_cpu_flags()))
+-        return;
+-
+-    c->scalarproduct_int16 = scalarproduct_int16_vsx;
+-#endif /* HAVE_VSX */
+ }
diff --git a/debian/patches/series b/debian/patches/series
index 812c215..983d53d 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -3,3 +3,4 @@
 0003-sws-tests-pixdesc_query-replace-rgb-based-pix-fmts-w.patch
 0004-swscale-fix-gbrap16-alpha-channel-issues.patch
 0005-arm-thumb2-blx.patch
+0006-disable-ppc-scalarproduct.patch

-- 
ffmpeg packaging