Problems linking to calloc

Joel Sherrill joel.sherrill at
Thu Jan 8 20:49:38 UTC 2004

Mark Mussetter wrote:

> Hi everyone,
> I am running rtems-4.6.0pre5 on a motorola 5272.  I am also going to run 
> Microwindows on top of rtems.  I can get a clean build of Microwindows 
> for rtems, but if I try to build any demos, I get errors from the linker 
> saying that it can't find calloc, rtems_semaphore_obtain, and others.  
> We do have the code for these functions in the rtems tree, but they 
> aren't getting linked in for some reason.
> Is there a library that needs to be linked in that we are missing?

I don't see the "-B... -qrtems" part of the FCC arguments on this
so you are not linking against RTEMS.

> Below is a clip from the build log:
> <SNIP>
> /opt/rtems-4.6/bin/m68k-rtems-gcc   -I. 
> -I/microwindows/microwindows-0.90-rtems/src/include 
> -I/usr/include/freetype2  
> -L/microwindows/microwindows-0.90-rtems/src/lib nxscribble.o 
> scribwidget.o hre_api.o li_recognizer.o bitvector.o matrix.o sc.o util.o 
> -o /microwindows/microwindows-0.90-rtems/src/bin/nxscribble 
> /microwindows/microwindows-0.90-rtems/src/lib/libnano-X.a 
> /microwindows/microwindows-0.90-rtems/src/lib/libmwengine.a 
> /microwindows/microwindows-0.90-rtems/src/lib/libmwdrivers.a 
> /microwindows/microwindows-0.90-rtems/src/lib/libmwfonts.a 
> /usr/lib/libfreetype.a -lm
> /opt/rtems-4.6/lib/gcc-lib/m68k-rtems/3.2.3/../../../../m68k-rtems/bin/ld: 
> warning: cannot find entry symbol _start; defaulting to 80000074
> /microwindows/microwindows-0.90-rtems/src/lib/libnano-X.a(nxutil.o): In 
> function `GrNewBitmapFromPixmap':
> nxutil.o(.text+0x516): undefined reference to `calloc'
> /microwindows/microwindows-0.90-rtems/src/lib/libnano-X.a(srvmain.o): In 
> function `GsAcceptClientFd':
> srvmain.o(.text+0x22): undefined reference to `close'
> /microwindows/microwindows-0.90-rtems/src/lib/libnano-X.a(srvmain.o): In 
> function `GrOpen':
> srvmain.o(.text+0xc6): undefined reference to `rtems_semaphore_obtain'
> srvmain.o(.text+0xf0): undefined reference to `rtems_semaphore_release'
> srvmain.o(.text+0x11c): undefined reference to `rtems_semaphore_release'
> and on and on and on......
> Thanks for any help you might provide,
> Mark

Joel Sherrill, Ph.D.             Director of Research & Development
joel at                 On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
Support Available                (256) 722-9985

More information about the users mailing list