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gcc: xtensa: fix __builtin_frame_address use with shared libgcc

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The xtensa port uses __xtensa_libgcc_window_spill in libgcc to implement
__builtin_frame_address. This symbol is local/hidden in libgcc. This is not a
problem when linking against static libgcc. But g++ defaults to
-shared-libgcc, thus breaking link against C++ shared libraries that are using
__builtin_frame_address as follows:

ld: test: hidden symbol `__xtensa_libgcc_window_spill' in .../libgcc.a(lib2funcs.o) is referenced by DSO

Add upstream patches that make libgcc_s.so a linker script that links in
unresolved symbols from the static libgcc, similar to the ARM and PowerPC
ports.

Fixes:
http://autobuild.buildroot.net/results/e2d/e2d1a763fa86b8575e2e48e6d73c018175f43e7c/

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Baruch Siach 2014-02-11 16:25:22 +02:00 committed by Peter Korsgaard
parent a728e2fe35
commit dd1c4f65b1
2 changed files with 58 additions and 0 deletions
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29
package/gcc/4.7.3/850-xtensa-libgcc-linker-script.patch Normal file
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@ -0,0 +1,29 @@
From a89db366b98fffc61b20074e658c7285fb302776 Mon Sep 17 00:00:00 2001
Message-Id: <a89db366b98fffc61b20074e658c7285fb302776.1392126646.git.baruch@tkos.co.il>
From: sterling <sterling@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 21 Jan 2014 19:29:23 +0000
Subject: [PATCH] 2014-01-21 Baruch Siach <barch@tkos.co.il>
* config.host (tmake_file): add t-slibgcc-libgcc for xtensa*-*-linux*.
Patch status: upstream (4.7 branch commit r206898)
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
---
diff --git a/libgcc/config.host b/libgcc/config.host
index e18e1d25021d..a6f7c450d702 100644
--- a/libgcc/config.host
+++ b/libgcc/config.host
@@ -1127,7 +1127,7 @@ xtensa*-*-elf*)
extra_parts="$extra_parts crti.o crtn.o"
;;
xtensa*-*-linux*)
- tmake_file="$tmake_file xtensa/t-xtensa xtensa/t-linux"
+ tmake_file="$tmake_file xtensa/t-xtensa xtensa/t-linux t-slibgcc-libgcc"
md_unwind_header=xtensa/linux-unwind.h
;;
am33_2.0-*-linux*)
--
1.8.5.3

29
package/gcc/4.8.2/850-xtensa-libgcc-linker-script.patch Normal file
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@ -0,0 +1,29 @@
From 7c722c07a0781e4279f643650bc528422c80ce5e Mon Sep 17 00:00:00 2001
Message-Id: <7c722c07a0781e4279f643650bc528422c80ce5e.1392126765.git.baruch@tkos.co.il>
From: sterling <sterling@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 21 Jan 2014 19:50:02 +0000
Subject: [PATCH] 2014-01-21 Baruch Siach <barch@tkos.co.il>
* config.host (tmake_file): add t-slibgcc-libgcc for xtensa*-*-linux*.
Patch status: upstream (4.8 branch commit r206905)
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
---
diff --git a/libgcc/config.host b/libgcc/config.host
index ee16d60e34a6..302aa6135211 100644
--- a/libgcc/config.host
+++ b/libgcc/config.host
@@ -1102,7 +1102,7 @@ xtensa*-*-elf*)
extra_parts="$extra_parts crti.o crtn.o"
;;
xtensa*-*-linux*)
- tmake_file="$tmake_file xtensa/t-xtensa xtensa/t-linux"
+ tmake_file="$tmake_file xtensa/t-xtensa xtensa/t-linux t-slibgcc-libgcc"
md_unwind_header=xtensa/linux-unwind.h
;;
am33_2.0-*-linux*)
--
1.8.5.3