problems with relocatable object files

rtwas rtwas at comcast.net
Sat Dec 6 11:06:55 UTC 2008


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.



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