1From cbcff58ed670c8edc0be1004384cbe0fd07d8d26 Mon Sep 17 00:00:00 2001
2From: Khem Raj <raj.khem@gmail.com>
3Date: Wed, 5 Jul 2017 18:49:21 -0700
4Subject: [PATCH 1/2] check for available arm optimizations
5
6Taken From
7http://sources.debian.net/src/mpeg2dec/0.5.1-7/debian/patches/65_arm-test-with-compiler.patch/
8
9Upstream-Status: Pending
10
11Signed-off-by: Khem Raj <raj.khem@gmail.com>
12---
13 configure.ac | 12 ++++++++----
14 1 file changed, 8 insertions(+), 4 deletions(-)
15
16diff --git a/configure.ac b/configure.ac
17index acdcb1e..2c0a721 100644
18--- a/configure.ac
19+++ b/configure.ac
20@@ -59,7 +59,7 @@ elif test x"$GCC" = x"yes"; then
21     AC_TRY_CFLAGS([$TRY_CFLAGS $CFLAGS],[OPT_CFLAGS="$TRY_CFLAGS"])
22
23     dnl arch-specific flags
24-    arm_conditional=false
25+    build_arm_opt=false
26     case "$host" in
27     i?86-* | k?-* | x86_64-* | amd64-*)
28 	AC_DEFINE([ARCH_X86],,[x86 architecture])
29@@ -102,8 +102,12 @@ elif test x"$GCC" = x"yes"; then
30     alpha*)
31 	AC_DEFINE([ARCH_ALPHA],,[alpha architecture]);;
32     arm*)
33-	arm_conditional=:
34-	AC_DEFINE([ARCH_ARM],,[ARM architecture]);;
35+	AC_LANG(C)
36+	AC_COMPILE_IFELSE(
37+		[AC_LANG_SOURCE([[
38+			void foo(void) { __asm__ volatile("pld [r1]"); }]])],
39+		build_arm_opt=true; AC_DEFINE([ARCH_ARM],,[ARM architecture]),
40+		build_arm_opt=false);;
41     esac
42 elif test x"$CC" = x"tendracc"; then
43     dnl TenDRA portability checking compiler
44@@ -123,7 +127,7 @@ else
45     esac
46 fi
47
48-AM_CONDITIONAL(ARCH_ARM, ${arm_conditional})
49+AM_CONDITIONAL(ARCH_ARM, test x$build_arm_opt = xtrue)
50
51 dnl Checks for libtool - this must be done after we set cflags
52 AC_LIBTOOL_WIN32_DLL
53--
542.13.2
55
56