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Fix ARM build with GCC trunk. 

sysdeps/unix/sysv/linux/arm/unwind-resume.c and
sysdeps/unix/sysv/linux/arm/unwind-forcedunwind.c have static
variables that are written in C code but only read from toplevel asms.
Current GCC trunk now optimizes away such apparently write-only static
variables, so causing a build failure.  This patch marks those
variables with __attribute_used__ to avoid that optimization.

Tested that this fixes the build for ARM.

	* sysdeps/unix/sysv/linux/arm/unwind-forcedunwind.c
	(libgcc_s_resume): Use __attribute_used__.
	* sysdeps/unix/sysv/linux/arm/unwind-resume.c (libgcc_s_resume):
	Likewise.
This commit is contained in:
Joseph Myers 2014-05-20 21:27:13 +00:00
parent 7c112a3812
commit 175cef4163
3 changed files with 11 additions and 2 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2014-05-20 Joseph Myers <joseph@codesourcery.com>
* sysdeps/unix/sysv/linux/arm/unwind-forcedunwind.c
(libgcc_s_resume): Use __attribute_used__.
* sysdeps/unix/sysv/linux/arm/unwind-resume.c (libgcc_s_resume):
Likewise.
2014-05-20 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
* sysdeps/powerpc/fpu/math_private.h [__copysignf]: Fix copysign macro

3
sysdeps/unix/sysv/linux/arm/unwind-forcedunwind.c
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@ -22,7 +22,8 @@
#include <pthreadP.h>
static void *libgcc_s_handle;
static void (*libgcc_s_resume) (struct _Unwind_Exception *exc);
static void (*libgcc_s_resume) (struct _Unwind_Exception *exc)
__attribute_used__;
static _Unwind_Reason_Code (*libgcc_s_personality)
(_Unwind_State, struct _Unwind_Exception *, struct _Unwind_Context *);
static _Unwind_Reason_Code (*libgcc_s_forcedunwind)

3
sysdeps/unix/sysv/linux/arm/unwind-resume.c
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@ -20,7 +20,8 @@
#include <stdio.h>
#include <unwind.h>
static void (*libgcc_s_resume) (struct _Unwind_Exception *exc);
static void (*libgcc_s_resume) (struct _Unwind_Exception *exc)
__attribute_used__;
static _Unwind_Reason_Code (*libgcc_s_personality)
(_Unwind_State, struct _Unwind_Exception *, struct _Unwind_Context *);