ffmpeg: fix reproducibility

(From OE-Core rev: 359f8e8bf9979aafedeafc3d012c6005ffcf3174)

Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit a4f7c6f831a551e3df503091fdca5c9f4add879d)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 103 insertions, 0 deletions

diff --git a/meta/recipes-multimedia/ffmpeg/ffmpeg/0001-libavutil-include-assembly-with-full-path-from-sourc.patch b/meta/recipes-multimedia/ffmpeg/ffmpeg/0001-libavutil-include-assembly-with-full-path-from-sourc.patch
new file mode 100644
index 0000000000..3b503c49c9
--- /dev/null
+++ b/meta/recipes-multimedia/ffmpeg/ffmpeg/0001-libavutil-include-assembly-with-full-path-from-sourc.patch
@@ -0,0 +1,97 @@
+From 24a58d70cbb3997e471366bd5afe54be9007bfb1 Mon Sep 17 00:00:00 2001
+From: Alexander Kanavin <alex.kanavin@gmail.com>
+Date: Tue, 10 Nov 2020 15:32:14 +0000
+Subject: [PATCH] libavutil: include assembly with full path from source root
+
+Otherwise nasm writes the full host-specific paths into .o
+output, which breaks binary reproducibility.
+
+Upstream-Status: Pending
+Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
+---
+ libavutil/x86/cpuid.asm      | 2 +-
+ libavutil/x86/emms.asm       | 2 +-
+ libavutil/x86/fixed_dsp.asm  | 2 +-
+ libavutil/x86/float_dsp.asm  | 2 +-
+ libavutil/x86/lls.asm        | 2 +-
+ libavutil/x86/pixelutils.asm | 2 +-
+ 6 files changed, 6 insertions(+), 6 deletions(-)
+
+diff --git a/libavutil/x86/cpuid.asm b/libavutil/x86/cpuid.asm
+index c3f7866..766f77f 100644
+--- a/libavutil/x86/cpuid.asm
++++ b/libavutil/x86/cpuid.asm
+@@ -21,7 +21,7 @@
+ ;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ ;******************************************************************************
+ 
+-%include "x86util.asm"
++%include "libavutil/x86/x86util.asm"
+ 
+ SECTION .text
+ 
+diff --git a/libavutil/x86/emms.asm b/libavutil/x86/emms.asm
+index 8611762..df84f22 100644
+--- a/libavutil/x86/emms.asm
++++ b/libavutil/x86/emms.asm
+@@ -18,7 +18,7 @@
+ ;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ ;******************************************************************************
+ 
+-%include "x86util.asm"
++%include "libavutil/x86/x86util.asm"
+ 
+ SECTION .text
+ 
+diff --git a/libavutil/x86/fixed_dsp.asm b/libavutil/x86/fixed_dsp.asm
+index 979dd5c..2f41185 100644
+--- a/libavutil/x86/fixed_dsp.asm
++++ b/libavutil/x86/fixed_dsp.asm
+@@ -20,7 +20,7 @@
+ ;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ ;******************************************************************************
+ 
+-%include "x86util.asm"
++%include "libavutil/x86/x86util.asm"
+ 
+ SECTION .text
+ 
+diff --git a/libavutil/x86/float_dsp.asm b/libavutil/x86/float_dsp.asm
+index 517fd63..b773e61 100644
+--- a/libavutil/x86/float_dsp.asm
++++ b/libavutil/x86/float_dsp.asm
+@@ -20,7 +20,7 @@
+ ;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ ;******************************************************************************
+ 
+-%include "x86util.asm"
++%include "libavutil/x86/x86util.asm"
+ 
+ SECTION_RODATA 32
+ pd_reverse: dd 7, 6, 5, 4, 3, 2, 1, 0
+diff --git a/libavutil/x86/lls.asm b/libavutil/x86/lls.asm
+index 317fba6..d2526d1 100644
+--- a/libavutil/x86/lls.asm
++++ b/libavutil/x86/lls.asm
+@@ -20,7 +20,7 @@
+ ;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ ;******************************************************************************
+ 
+-%include "x86util.asm"
++%include "libavutil/x86/x86util.asm"
+ 
+ SECTION .text
+ 
+diff --git a/libavutil/x86/pixelutils.asm b/libavutil/x86/pixelutils.asm
+index 36c57c5..8b45ead 100644
+--- a/libavutil/x86/pixelutils.asm
++++ b/libavutil/x86/pixelutils.asm
+@@ -21,7 +21,7 @@
+ ;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ ;******************************************************************************
+ 
+-%include "x86util.asm"
++%include "libavutil/x86/x86util.asm"
+ 
+ SECTION .text
+ 
diff --git a/meta/recipes-multimedia/ffmpeg/ffmpeg_4.2.2.bb b/meta/recipes-multimedia/ffmpeg/ffmpeg_4.2.2.bb
index fddfef9e27..0e359848fa 100644
--- a/meta/recipes-multimedia/ffmpeg/ffmpeg_4.2.2.bb
+++ b/meta/recipes-multimedia/ffmpeg/ffmpeg_4.2.2.bb
@@ -26,6 +26,7 @@ LIC_FILES_CHKSUM = "file://COPYING.GPLv2;md5=b234ee4d69f5fce4486a80fdaf4a4263 \
 SRC_URI = "https://www.ffmpeg.org/releases/${BP}.tar.xz \
            file://mips64_cpu_detection.patch \
            file://CVE-2020-12284.patch \
+           file://0001-libavutil-include-assembly-with-full-path-from-sourc.patch \
            "
 SRC_URI[md5sum] = "348956fc2faa57a2f79bbb84ded9fbc3"
 SRC_URI[sha256sum] = "cb754255ab0ee2ea5f66f8850e1bd6ad5cac1cd855d0a2f4990fb8c668b0d29c"
@@ -129,6 +130,11 @@ do_configure() {
     ${S}/configure ${EXTRA_OECONF}
 }
 
+# patch out build host paths for reproducibility
+do_compile_prepend_class-target() {
+        sed -i -e "s,${WORKDIR},,g" ${B}/config.h
+}
+
 PACKAGES =+ "libavcodec \
              libavdevice \
              libavfilter \