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https://bugs.gentoo.org/635674

From ca6b6f3ad9190814ef7869e8c7e73dae0922f647 Mon Sep 17 00:00:00 2001
From: Romain Naour <romain.naour@smile.fr>
Date: Mon, 3 Jul 2017 15:31:10 +0200
Subject: [PATCH] libunwind-arm: fix build failure due to asm()

mesa3d on ARM build with libunwind support enabled fail to build due to asm()
function used when building with -std=c99.
The gcc documentation [1] suggest to use __asm__ instead of asm.

Fixes:
https://urldefense.proofpoint.com/v2/url?u=http-3A__autobuild.buildroot.net_results_3ef_3efe156b6494e4392b6c31de447ee2c72acc1a53&d=DwICAg&c=5VD0RTtNlTh3ycd41b3MUw&r=vou6lT5jmE_fWQWZZgNrsMWu4RT87QAB9V07tPHlP5U&m=BlAszRQ0vewy5vW7raCh9FmNOACKez_juz55zoiNfUs&s=4sXL6_rFriQz7qi5ygKXBIVHMc7YSdCBnkkHoi347CU&e=

[1] https://gcc.gnu.org/onlinedocs/gcc/Alternate-Keywords.html#Alternate-Keywords

Signed-off-by: Romain Naour <romain.naour@smile.fr>
Cc: Bernd Kuhls <bernd.kuhls@t-online.de>
---
 include/libunwind-arm.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/libunwind-arm.h b/include/libunwind-arm.h
index f208487a..1c856faf 100644
--- a/include/libunwind-arm.h
+++ b/include/libunwind-arm.h
@@ -265,7 +265,7 @@ unw_tdep_context_t;
 #ifndef __thumb__
 #define unw_tdep_getcontext(uc) (({                                     \
   unw_tdep_context_t *unw_ctx = (uc);                                   \
-  register unsigned long *unw_base asm ("r0") = unw_ctx->regs;          \
+  register unsigned long *unw_base __asm__ ("r0") = unw_ctx->regs;      \
   __asm__ __volatile__ (                                                \
     "stmia %[base], {r0-r15}"                                           \
     : : [base] "r" (unw_base) : "memory");                              \
@@ -273,7 +273,7 @@ unw_tdep_context_t;
 #else /* __thumb__ */
 #define unw_tdep_getcontext(uc) (({                                     \
   unw_tdep_context_t *unw_ctx = (uc);                                   \
-  register unsigned long *unw_base asm ("r0") = unw_ctx->regs;          \
+  register unsigned long *unw_base __asm__ ("r0") = unw_ctx->regs;      \
   __asm__ __volatile__ (                                                \
     ".align 2\nbx pc\nnop\n.code 32\n"                                  \
     "stmia %[base], {r0-r15}\n"                                         \
-- 
2.18.0