poky/meta/recipes-devtools/gcc/gcc/0034-libgcc_s-Use-alias-for-__cpu_indicator_init-instead-.patch

From ea9154338cb3acbd75945fddde4202e73c20dd1a Mon Sep 17 00:00:00 2001
From: Szabolcs Nagy <nsz@port70.net>
Date: Sat, 24 Oct 2015 20:09:53 +0000
Subject: [PATCH] libgcc_s: Use alias for __cpu_indicator_init instead of
 symver

Adapter from

https://gcc.gnu.org/ml/gcc-patches/2015-05/msg00899.html

This fix was debated but hasnt been applied gcc upstream since
they expect musl to support '@' in symbol versioning which is
a sun/gnu versioning extention. This patch however avoids the
need for the '@' symbols at all

libgcc/Changelog:

2015-05-11  Szabolcs Nagy  <szabolcs.nagy@arm.com>

	* config/i386/cpuinfo.c (__cpu_indicator_init_local): Add.
	(__cpu_indicator_init@GCC_4.8.0, __cpu_model@GCC_4.8.0): Remove.

	* config/i386/t-linux (HOST_LIBGCC2_CFLAGS): Remove -DUSE_ELF_SYMVER.

gcc/Changelog:

2015-05-11  Szabolcs Nagy  <szabolcs.nagy@arm.com>

	* config/i386/i386-expand.c (ix86_expand_builtin): Make __builtin_cpu_init
	call __cpu_indicator_init_local instead of __cpu_indicator_init.

Upstream-Status: Pending

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 gcc/config/i386/i386-expand.c | 4 ++--
 libgcc/config/i386/cpuinfo.c  | 6 +++---
 libgcc/config/i386/t-linux    | 2 +-
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/gcc/config/i386/i386-expand.c b/gcc/config/i386/i386-expand.c
index ac69eed4d32..ffaa44a16fc 100644
--- a/gcc/config/i386/i386-expand.c
+++ b/gcc/config/i386/i386-expand.c
@@ -11038,10 +11038,10 @@ ix86_expand_builtin (tree exp, rtx target, rtx subtarget,
     {
     case IX86_BUILTIN_CPU_INIT:
       {
-	/* Make it call __cpu_indicator_init in libgcc. */
+	/* Make it call __cpu_indicator_init_local in libgcc.a. */
 	tree call_expr, fndecl, type;
         type = build_function_type_list (integer_type_node, NULL_TREE); 
-	fndecl = build_fn_decl ("__cpu_indicator_init", type);
+	fndecl = build_fn_decl ("__cpu_indicator_init_local", type);
 	call_expr = build_call_expr (fndecl, 0); 
 	return expand_expr (call_expr, target, mode, EXPAND_NORMAL);
       }
diff --git a/libgcc/config/i386/cpuinfo.c b/libgcc/config/i386/cpuinfo.c
index ef463848f9d..1a3de052c80 100644
--- a/libgcc/config/i386/cpuinfo.c
+++ b/libgcc/config/i386/cpuinfo.c
@@ -63,7 +63,7 @@ __cpu_indicator_init (void)
 			     __cpu_features2);
 }
 
-#if defined SHARED && defined USE_ELF_SYMVER
-__asm__ (".symver __cpu_indicator_init, __cpu_indicator_init@GCC_4.8.0");
-__asm__ (".symver __cpu_model, __cpu_model@GCC_4.8.0");
+#ifndef SHARED
+int __cpu_indicator_init_local (void)
+  __attribute__ ((weak, alias ("__cpu_indicator_init")));
 #endif
diff --git a/libgcc/config/i386/t-linux b/libgcc/config/i386/t-linux
index 8506a635790..564296f788e 100644
--- a/libgcc/config/i386/t-linux
+++ b/libgcc/config/i386/t-linux
@@ -3,5 +3,5 @@
 # t-slibgcc-elf-ver and t-linux
 SHLIB_MAPFILES = libgcc-std.ver $(srcdir)/config/i386/libgcc-glibc.ver
 
-HOST_LIBGCC2_CFLAGS += -mlong-double-80 -DUSE_ELF_SYMVER $(CET_FLAGS)
+HOST_LIBGCC2_CFLAGS += -mlong-double-80 $(CET_FLAGS)
 CRTSTUFF_T_CFLAGS += $(CET_FLAGS)