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| author | Martin Storsjö <martin@martin.st> | 2015-02-18 00:40:06 +0200 |
|---|---|---|
| committer | Martin Storsjö <martin@martin.st> | 2015-03-07 17:10:08 +0200 |
| commit | dcae2e32f7d8a1ca5fb8c1e4aa81313be854dd73 (patch) | |
| tree | e6b35f658d8455f8ed30247355f87479d2d60957 | |
| parent | cecf45b2bfbb85e9e59f355428fbd4d8cbc652a8 (diff) | |
| download | ffmpeg-dcae2e32f7d8a1ca5fb8c1e4aa81313be854dd73.tar.gz | |
arm: Suppress tags about used cpu arch and extensions
When all the codepaths using manually set .arch/.fpu code is
behind runtime detection, the elf attributes should be suppressed.
This allows tools to know that the final built binary doesn't
strictly require these extensions.
Signed-off-by: Martin Storsjö <martin@martin.st>
| -rwxr-xr-x | configure | 6 | ||||
| -rw-r--r-- | libavutil/arm/asm.S | 6 |
2 files changed, 12 insertions, 0 deletions
@@ -1494,6 +1494,7 @@ SYSTEM_FUNCS=" TOOLCHAIN_FEATURES=" as_dn_directive as_func + as_object_arch asm_mod_q attribute_may_alias attribute_packed @@ -3869,6 +3870,11 @@ if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then .func test .endfunc EOF + + # llvm's integrated assembler supports .object_arch from llvm 3.5 + enabled arm && test "$objformat" = elf && check_as <<EOF && enable as_object_arch +.object_arch armv4 +EOF fi check_inline_asm inline_asm_labels '"1:\n"' diff --git a/libavutil/arm/asm.S b/libavutil/arm/asm.S index 8479304f5f..943c1cea3f 100644 --- a/libavutil/arm/asm.S +++ b/libavutil/arm/asm.S @@ -49,11 +49,17 @@ #elif HAVE_ARMV5TE .arch armv5te #endif +#if HAVE_AS_OBJECT_ARCH +ELF .object_arch armv4 +#endif #if HAVE_NEON .fpu neon +ELF .eabi_attribute 10, 0 @ suppress Tag_FP_arch +ELF .eabi_attribute 12, 0 @ suppress Tag_Advanced_SIMD_arch #elif HAVE_VFP .fpu vfp +ELF .eabi_attribute 10, 0 @ suppress Tag_FP_arch #endif .syntax unified |