RE: [ECOS] Linking problem

["Meulendijks, J." <Meulendijks at WT dot TNO dot NL>]

I have one more question about the linker script target.ld. I have copied one
line of target.ld below:
.vectors 0x00400000 : { . = .; KEEP(*(.vectors)) } > ram

My question is what is the meaning of " . = . ;" It is used a couple of times in
target.ld but I cannot find the meaning of this anywhere! 
Thanks

-----Original Message-----
From: Gary Thomas [mailto:gary@mlbassoc.com]
Sent: dinsdag 21 september 2004 15:05
To: Meulendijks, J.
Cc: eCos Discussion
Subject: RE: [ECOS] Linking problem


On Tue, 2004-09-21 at 06:57, Meulendijks, J. wrote:
> OK. Is it possible to have 2 linkerscripts? Or must I combine the 2
> linkerscripts? Or isn't that possible at all? Cause I already have another
> linkerscript which has nothing to do with eCos but is needed by my project.

What does your script do?  

I don't think you can have two scripts and I'll bet that the eCos 
one is sufficient if you use it correctly.

> 
> -----Original Message-----
> From: Gary Thomas [mailto:gary@mlbassoc.com]
> Sent: dinsdag 21 september 2004 14:45
> To: Meulendijks, J.
> Cc: 'Sebastian Block'; eCos Discussion
> Subject: RE: [ECOS] Linking problem
> 
> 
> On Tue, 2004-09-21 at 06:41, Meulendijks, J. wrote:
> > libtarget.a is in directory -Lc:/ecos-work/ecos_install/lib so that's not
the
> > problem, right?
> 
> I don't see any mention of "target.ld" which is how eCos tells the
> linker what to link and how.
> 
> Try looking at how the eCos tests get linked, or perhaps use the
> build_Makefile/build_Make.params scripts to get started.
> 
> > 
> > -----Original Message-----
> > From: Sebastian Block [mailto:SebastianBlock@gmx.net]
> > Sent: dinsdag 21 september 2004 14:39
> > To: ecos-discuss@ecos.sourceware.org
> > Cc: Meulendijks, J.
> > Subject: Re: [ECOS] Linking problem
> > 
> > 
> > Am Dienstag, 21. September 2004 14:16 schrieb Meulendijks, J.:
> > > When I try to link my application I get the following output:
> > >
> > > Commando:
> > > powerpc-eabi-ld -g -nostartfiles -Lc:/ecos-work/ecos_install/lib -Map
> > > .\output/l ink.map -T.\output\link.lk .\obj/untitled_single_gnu.o
> > > .\obj/rt_main.o .\obj/rt_ sim.o .\obj/rt_nonfinite.o
> > > .\obj/untitled_single_gnu_app_TNO.o C:\Macs\Driver/st artup.o
> > > C:\Macs\Driver/fixfloat.o C:\Macs\Driver/toucan.o C:\Macs\Driver/qsmcm.o
> > > C:\Macs\Driver/mpc555.o C:\Macs\Driver/main.o C:\Macs\Driver/io_buffer.o
> > > C:\Mac s\Driver/ccp_apl.o c:/cygwin/gnu/powerpc/lib/libads.a
> > > c:/cygwin/gnu/powerpc/lib/ libg.a c:/cygwin/gnu/powerpc/lib/libgcc.a
> > > c:/cygwin/gnu/powerpc/lib/libiberty.a c:/cygwin/gnu/powerpc/lib/libm.a
> > > c:/cygwin/gnu/powerpc/lib/libmbx.a c:/cygwin/gn u/powerpc/lib/libmvme.a
> > > c:/cygwin/gnu/powerpc/lib/libnosys.a c:/cygwin/gnu/power pc/lib/libsim.a
> > > c:/cygwin/gnu/powerpc/lib/libtr555.a c:/cygwin/gnu/powerpc/lib/l ibyk.a
> > > c:/cygwin/gnu/powerpc/lib/eCos/libsupc++.a  c:/cygwin/gnu/powerpc/obj/ecr
> > > tn.o c:/cygwin/gnu/powerpc/obj/ecrti.o  C:\MATLAB6p5p1/rtw/c/lib/rtwlib.a
> > > -o .\o utput/ram.elf
> > >
> > > Output:
> > > ### Linking ram.elf ###
> > > .\obj/untitled_single_gnu.o: In function `cyg_user_start':
> > > /ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw/twothreads.c:27:
> > > undefined re ference to `cyg_mutex_init'
> > > /ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw/twothreads.c:27:
> > > relocation t runcated to fit: R_PPC_REL24 cyg_mutex_init
> > > /ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw/twothreads.c:29:
> > > undefined re ference to `cyg_thread_create'
> > > /ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw/twothreads.c:29:
> > > relocation t runcated to fit: R_PPC_REL24 cyg_thread_create
> > > /ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw/twothreads.c:32:
> > > undefined re ference to `cyg_thread_create'
> > > /ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw/twothreads.c:32:
> > > relocation t runcated to fit: R_PPC_REL24 cyg_thread_create
> > > /ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw/twothreads.c:36:
> > > undefined re ference to `cyg_thread_resume'
> > > /ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw/twothreads.c:36:
> > > relocation t runcated to fit: R_PPC_REL24 cyg_thread_resume
> > > /ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw/twothreads.c:37:
> > > undefined re ference to `cyg_thread_resume'
> > > /ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw/twothreads.c:37:
> > > relocation t runcated to fit: R_PPC_REL24 cyg_thread_resume
> > > .\obj/untitled_single_gnu.o: In function `simple_program':
> > > /ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw/twothreads.c:48:
> > > undefined re ference to `cyg_thread_delay'
> > > /ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw/twothreads.c:48:
> > > relocation t runcated to fit: R_PPC_REL24 cyg_thread_delay
> > > /ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw/twothreads.c:55:
> > > undefined re ference to `cyg_mutex_lock'
> > > /ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw/twothreads.c:55:
> > > relocation t runcated to fit: R_PPC_REL24 cyg_mutex_lock
> > > /ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw/twothreads.c:59:
> > > undefined re ference to `cyg_mutex_unlock'
> > > /ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw/twothreads.c:59:
> > > relocation t runcated to fit: R_PPC_REL24 cyg_mutex_unlock
> > > /ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw/twothreads.c:60:
> > > undefined re ference to `cyg_thread_delay'
> > > /ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw/twothreads.c:60:
> > > relocation t runcated to fit: R_PPC_REL24 cyg_thread_delay
> > > make: *** [.\output/ram.elf] Error 1
> > > make: Leaving directory
> > > `/ecos-c/eCos-Work/Test/untitled_single_gnu_TNO_rtw' Finished
> > >
> > > Does anybody know what is wrong? I my opinion the linker is missing
> > > something but I cannot see what.
> > 
> > perhabs libtarget.a !?
> > 
> > Seabastian
> -- 
> Gary Thomas <gary@mlbassoc.com>
> MLB Associates
-- 
Gary Thomas <gary@mlbassoc.com>
MLB Associates

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