From 59cee42d7d22530e66a155305389e29679b11f78 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
Date: Wed, 3 May 2017 11:18:51 +0300
Subject: [PATCH] arm: Check for the .arch directive in configure
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
When targeting windows, the .arch directive isn't available.
So far, when building for windows, we've always used gas-preprocessor,
both when using msvc's armasm and when using clang. Lately, clang/llvm
has implemented the last missing piece (altmacro support) for building
our assembly without gas-preprocessor. This means that we now build
for arm/windows with clang without any extra compatibility layer.
Signed-off-by: Martin Storsjö <martin@martin.st>
---
configure | 4 ++++
libavutil/arm/asm.S | 2 ++
2 files changed, 6 insertions(+)
diff --git a/configure b/configure
index 6f696c9ab5e..d70e61593ab 100755
--- a/configure
+++ b/configure
@@ -1661,6 +1661,7 @@ SYSTEM_FUNCS="
"
TOOLCHAIN_FEATURES="
+ as_arch_directive
as_dn_directive
as_fpu_directive
as_func
@@ -4376,6 +4377,9 @@ EOF
check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
+ check_as <<EOF && enable as_arch_directive
+.arch armv7-a
+EOF
check_as <<EOF && enable as_dn_directive
ra .dn d0.i16
.unreq ra
diff --git a/libavutil/arm/asm.S b/libavutil/arm/asm.S
index a791e80c57d..08574852b58 100644
--- a/libavutil/arm/asm.S
+++ b/libavutil/arm/asm.S
@@ -46,6 +46,7 @@
# define FPU @
#endif
+#if HAVE_AS_ARCH_DIRECTIVE
#if HAVE_NEON
.arch armv7-a
#elif HAVE_ARMV6T2
@@ -55,6 +56,7 @@
#elif HAVE_ARMV5TE
.arch armv5te
#endif
+#endif
#if HAVE_AS_OBJECT_ARCH
ELF .object_arch armv4
#endif
--
GitLab