From dcae2e32f7d8a1ca5fb8c1e4aa81313be854dd73 Mon Sep 17 00:00:00 2001
From: Martin Storsjö <martin@martin.st>
Date: Wed, 18 Feb 2015 00:40:06 +0200
Subject: arm: Suppress tags about used cpu arch and extensions
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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>
---
 configure | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'configure')

diff --git a/configure b/configure
index 0e182b484f..59438b833e 100755
--- a/configure
+++ b/configure
@@ -1494,6 +1494,7 @@ SYSTEM_FUNCS="
 TOOLCHAIN_FEATURES="
     as_dn_directive
     as_func
+    as_object_arch
     asm_mod_q
     attribute_may_alias
     attribute_packed
@@ -3868,6 +3869,11 @@ if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
     check_as <<EOF && enable as_func
 .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
 
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