From: Ian Leonard <redacted>
Date: Tue, 8 Aug 2017 07:09:21 +0000 (-0700)
Subject: ffmpeg: enable lto build for arm and x86_64
X-Git-Url: http://git.99rst.org/?a=commitdiff_plain;h=adc293d3d961118f2211a7cbd7251b4cd43eb7c3;p=openwrt-packages.git

ffmpeg: enable lto build for arm and x86_64

This toggles on Link-Time Optimization for arm and x86-64.

Compile tested on arm/bcm47xx, arm/mvebu, arm/imx6 and x86-64/generic

(Also compile tested on mips/ar71xx where it failed so this change is currently for specific arches.)

Size savings for libffmpeg were 2-3% when measured with libffmpeg-full and libffmpeg-mini.

Signed-off-by: Ian Leonard <redacted>
---

diff --git a/multimedia/ffmpeg/Makefile b/multimedia/ffmpeg/Makefile
index 4f58b717b..9dda6a73f 100644
--- a/multimedia/ffmpeg/Makefile
+++ b/multimedia/ffmpeg/Makefile
@@ -404,6 +404,8 @@ endif
 
 # selectively disable optimizations according to arch/cpu type
 ifneq ($(findstring arm,$(CONFIG_ARCH)),)
+	FFMPEG_CONFIGURE+= --enable-lto
+
 	ifneq ($(findstring vfp,$(CONFIG_TARGET_OPTIMIZATION)),)
 		FFMPEG_CONFIGURE+= --enable-vfp
 	else
@@ -419,6 +421,10 @@ ifneq ($(findstring arm,$(CONFIG_ARCH)),)
 
 endif
 
+ifeq ($(ARCH),x86_64)
+	FFMPEG_CONFIGURE+= --enable-lto
+endif
+
 ifneq ($(CONFIG_YASM),y)
 FFMPEG_CONFIGURE+= --disable-yasm