From fd6dbc53855fbfc9a782095d0ffe11dd3a98905f Mon Sep 17 00:00:00 2001
From: James Almer <jamrial@gmail.com>
Date: Sat, 9 Jul 2016 16:00:06 -0300
Subject: [PATCH] =?UTF-8?q?Revert=20"configure:=20Enable=20GCC=20vectoriza?=
=?UTF-8?q?tion=20on=20=E2=89=A54.9=20on=20x86"?=
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This reverts commit cb8646af24bd8e9627cc5e1c62b049a00fe0b07b.
This change has brough more issues than benefits, between compilation
time failures depending on flags used and code miscompilation causing
runtime crashes.
See the "[PATCH 2/2] configure: Enable GCC vectorization on ≥4.9"
thread in the ffmpeg-devel mailing list for the relevant discussion.
---
configure | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/configure b/configure
index d926af8c755..e015c758285 100755
--- a/configure
+++ b/configure
@@ -6139,11 +6139,7 @@ elif enabled ccc; then
add_cflags -msg_disable nonstandcast
add_cflags -msg_disable unsupieee
elif enabled gcc; then
- case $gcc_basever in
- 4.9*) enabled x86 || check_optflags -fno-tree-vectorize ;;
- 4.*) check_optflags -fno-tree-vectorize ;;
- *) enabled x86 || check_optflags -fno-tree-vectorize ;;
- esac
+ check_optflags -fno-tree-vectorize
check_cflags -Werror=format-security
check_cflags -Werror=implicit-function-declaration
check_cflags -Werror=missing-prototypes
--
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