RFA: Add weak definition of __dso_handle for FRV, IQ2000, MN10300 and V850

[Jeff Johnston]

Please go ahead.

-- Jeff J.

Nick Clifton wrote:
> Hi Jeff,
>
>   Please may I apply the patch below which adds a weak definition of
>   the __dso_handle symbol to the FRV, IQ2000, MN10300 and V850 ports.
>   This allows these ports to compile C++ programs, and in particular
>   the G++ testsuite, when they are using NEWLIB rather than GLIBC.
>
> Cheers
>   Nick
>
> newlib/ChangeLog
> 2008-05-20  Nick Clifton  <nickc@redhat.com>
>
> 	* libc/sys/sysnecv850/crt0.S (___dso_handle): Define (weak).
>
> libgloss/ChangeLog
> 2008-05-20  Nick Clifton  <nickc@redhat.com>
>
> 	* iq2000/crt0.S (__dso_handle): Define (weak).
> 	* frv/crt0.S (__dso_handle): Define (weak).
> 	* mn10300/crt0.S (___dso_handle): Define (weak).
>
> Index: newlib/libc/sys/sysnecv850/crt0.S
> ===================================================================
> RCS file: /cvs/src/src/newlib/libc/sys/sysnecv850/crt0.S,v
> retrieving revision 1.3
> diff -c -3 -p -r1.3 crt0.S
> *** newlib/libc/sys/sysnecv850/crt0.S	31 Jul 2003 16:21:20 -0000	1.3
> --- newlib/libc/sys/sysnecv850/crt0.S	20 May 2008 07:01:45 -0000
> *************** _start:
> *** 60,67 ****
>   	jarl    _main,		r31
>   	mov     r10,		r6
>   	jarl    _exit,		r31
> - 
>   # endif
>   
>   	.section .stack
>   _stack:	.long 	1
> --- 60,72 ----
>   	jarl    _main,		r31
>   	mov     r10,		r6
>   	jarl    _exit,		r31
>   # endif
>   
>   	.section .stack
>   _stack:	.long 	1
> + 
> + 	.section .data
> + 	.global ___dso_handle
> + 	.weak   ___dso_handle
> + ___dso_handle:
> + 	.long	0
> Index: libgloss/frv/crt0.S
> ===================================================================
> RCS file: /cvs/src/src/libgloss/frv/crt0.S,v
> retrieving revision 1.3
> diff -c -3 -p -r1.3 crt0.S
> *** libgloss/frv/crt0.S	24 Mar 2004 01:11:24 -0000	1.3
> --- libgloss/frv/crt0.S	20 May 2008 07:01:45 -0000
> *************** EXT(__frv_fix_usrptrs):
> *** 268,270 ****
> --- 268,276 ----
>   .Lret3:	ret
>   .Lend3:
>   	.size	EXT(__frv_fix_usrptrs),.Lend2-EXT(__frv_fix_usrptrs)
> + 
> + 	.section .data
> + 	.global __dso_handle
> + 	.weak __dso_handle
> + __dso_handle:
> + 	.long	0
> Index: libgloss/iq2000/crt0.S
> ===================================================================
> RCS file: /cvs/src/src/libgloss/iq2000/crt0.S,v
> retrieving revision 1.1
> diff -c -3 -p -r1.1 crt0.S
> *** libgloss/iq2000/crt0.S	6 Jun 2003 16:07:57 -0000	1.1
> --- libgloss/iq2000/crt0.S	20 May 2008 07:01:45 -0000
> *************** _start:
> *** 54,56 ****
> --- 54,62 ----
>   	xor %5,%5,%5
>   	jal exit		# all done, no need to return or
>   	or %4,%0,%2		# exit with main's return value
> + 
> + 	.section .data
> + 	.global __dso_handle
> + 	.weak __dso_handle
> + __dso_handle:
> + 	.long	0
> Index: libgloss/mn10300/crt0.S
> ===================================================================
> RCS file: /cvs/src/src/libgloss/mn10300/crt0.S,v
> retrieving revision 1.1
> diff -c -3 -p -r1.1 crt0.S
> *** libgloss/mn10300/crt0.S	17 Mar 2000 22:48:51 -0000	1.1
> --- libgloss/mn10300/crt0.S	20 May 2008 07:01:45 -0000
> *************** _start:
> *** 56,58 ****
> --- 56,64 ----
>   
>   	.section .stack
>   _stack:	.long 	1
> + 
> + 	.section .data
> + 	.global ___dso_handle
> + 	.weak ___dso_handle
> + ___dso_handle:
> + 	.long	0
>