problems with relocatable object files

[Till Straumann]

When you link your relocatable file (simplified) with

gcc -r $(OBJECTS) -o myrel.o

then gcc will implicitly link startfiles and 'default' libraries such as 
libc etc.

Hope you didn't forget to add -nostdlib, i.e.,

gcc -nostdlib -r $(OBJECTS) -o myrel.o

HTH
-- Till

rtwas wrote:
> Hello,
>
> I'm trying to move my build tree to the *rtems* was of doing things. Our 
> project is rather large so
> we link using "-r" for later linking into the final executable. It 
> (relocatable object) compiles and links ok but when I try
> to use it in the final linking I get weird errors like:
>
> rpc/gimbalnop/server/o-optimize/TtRpcNopCmdSvr.o: In function `MMUon':
> /usr/local/packages/rtos/rtems/4.9/4.9.0/rtems-4.9.0-mvme5500-build.110708.00/powerpc-rtems4.9/c/mvme5500/lib/libbsp/powerpc/mvme5500/../../../../../../../../rtems-4.9.0/c/src/lib/libbsp/powerpc/mvme5500/start/start.S:139: 
> multiple definition of `MMUon'
> /opt/rtems-4.9/powerpc-rtems4.9/mvme5500/lib/mvme5500start.o:/usr/local/packages/rtos/rtems/4.9/4.9.0/rtems-4.9.0-mvme5500-build.110708.00/powerpc-rtems4.9/c/mvme5500/lib/libbsp/powerpc/mvme5500/../../../../../../../../rtems-4.9.0/c/src/lib/libbsp/powerpc/mvme5500/start/start.S:139: 
> first defined here
> rpc/gimbalnop/server/o-optimize/TtRpcNopCmdSvr.o:(.data+0x0): multiple 
> definition of `__dso_handle'
> /opt/rtems-4.9/lib/gcc/powerpc-rtems4.9/4.3.2/m7400/crtbegin.o:(.data+0x0): 
> first defined here
> rpc/gimbalnop/server/o-optimize/TtRpcNopCmdSvr.o:(.got2+0x0): multiple 
> definition of `__GOT2_START__'
> /opt/rtems-4.9/lib/gcc/powerpc-rtems4.9/4.3.2/m7400/ecrti.o:/builddir/build/BUILD/rtems-4.9-powerpc-rtems4.9-gcc-4.3.2/build/gcc/ecrti.S:115: 
> first defined here
> .
> .
> . etc.
>
>
> This Makefile I'm using is based on a *working* Makefile that builds 
> under linux.
>
>
> After some mods to the original linux Makefile I have something like this:
> .
> .
> .
> CSRCS = ${CFILES}
> COBJS_ = $(CSRCS:.c=.o)
> COBJS = $(COBJS_:%=${ARCH}/%)
>
>
> include $(RTEMS_MAKEFILE_PATH)/Makefile.inc
> include $(RTEMS_CUSTOM)
> include $(PROJECT_ROOT)/make/leaf.cfg
>
> CPPFLAGS += -I../../.. -I../../../include
>
>
>
> TARGET = TtRpcNopCmdSvr
>
> all: ${TARGET}.o
>
>
> %.o: %.c
>         ${COMPILE.c}  ${CPPFLAGS}  $< 
>
> ${TARGET}.o: ${COBJS_}
>         ${LINK.c} -o ${ARCH}/${TARGET}.o -r ${COBJS_}
> .
> .
> .
>
>
> Help appreciated.
>
> Thanks,
>
> Robert W.
> _______________________________________________
> rtems-users mailing list
> rtems-users at rtems.com
> http://rtems.rtems.org/mailman/listinfo/rtems-users
>