Re: [Condor-users] condor_compile problem

[Mark Calleja <M.Calleja@xxxxxxxxxxxxxxx>]

OK, I've got it to work after some mucking about, but it's not a pretty 
solution. The line in the Makefile that was failing was:

condor_compile g++ -I. -I/home/mcal00/softsusy/trunk 
-L/home/mcal00/softsusy/trunk -L/home/mcal00/mwCalc/trunk/Program -L. -ansi 
-pedantic -Wall -Df2cFortran -O2 -lsoft -lmarkov -lm -lkernlib -lpacklib 
-lmathlib -lsoft -lAMWObs -lg2c

This was being expanded by condor_compile into:

/usr/bin/ld -L/Condor/Debian/condor/lib -Bstatic --eh-frame-hdr -m elf_i386 
-dynamic-linker /lib/ld-linux.so.2 /Condor/Debian/condor/lib/condor_rt0.o 
/usr/lib/gcc/i486-linux-gnu/3.4.6/../../../../lib/crti.o 
/usr/lib/gcc/i486-linux-gnu/3.4.6/crtbeginT.o -L/home/mcal00/softsusy/trunk 
-L/home/mcal00/mwCalc/trunk/Program -L. -L/Condor/Debian/condor/lib 
-L/usr/lib/gcc/i486-linux-gnu/3.4.6 -L/usr/lib/gcc/i486-linux-gnu/3.4.6 
-L/usr/lib/gcc/i486-linux-gnu/3.4.6/../../../../lib 
-L/usr/lib/gcc/i486-linux-gnu/3.4.6/../../.. -L/lib/../lib 
-L/usr/lib/../lib -lsoft -lmarkov -lkernlib -lpacklib -lmathlib -lsoft 
-lAMWObs /Condor/Debian/condor/lib/libcondorzsyscall.a 
/Condor/Debian/condor/lib/libz.a 
/Condor/Debian/condor/lib/libcomp_libstdc++.a -lg2c 
/Condor/Debian/condor/lib/libcomp_libstdc++.a -lm 
/Condor/Debian/condor/lib/libcomp_libgcc.a 
/Condor/Debian/condor/lib/libcomp_libgcc_eh.a -lc -lnss_files -lnss_dns 
-lresolv -lc -lnss_files -lnss_dns -lresolv -lc 
/Condor/Debian/condor/lib/libcomp_libgcc.a 
/Condor/Debian/condor/lib/libcomp_libgcc_eh.a 
/usr/lib/gcc/i486-linux-gnu/3.4.6/crtend.o 
/usr/lib/gcc/i486-linux-gnu/3.4.6/../../../../lib/crtn.o

...and this would fail with an undefined reference to `main'. Now, the main 
routine lives in sugrafit.o which in turn is archived in the library 
libmarkov.a. Hence in order to get the linking to work I had to explicitly 
mention that object file early on in the call to ld, link in libmarkov.a 
earlier and put in and explicit mention to libstdc++.a, so the ld directive 
now looks like:

/usr/bin/ld sugrafit.o -lmarkov -lstdc++ <everything else but remove 
-lmarkov>

This now links together a working standard-universe executable. 

Mark

On Jul 7 2006, David A. Kotz wrote:

> I've recently run into a very similar problem that I was going to write 
> up.  The code compiles and runs just fine under the vanilla universe, 
> but when we try to condor_compile it, we get the "undefined reference to 
> 'main'" error.
>
> - dave
>
>
> Mark Calleja wrote:
> > Hi,
> >
> > I'm trying to link together some code with Condor's libraries via 
> > condor_compile but have run into a problem. The code works perfectly 
> > well on its own, but condor_compile fails with:
> >
> > /Condor/Debian/condor/lib/libcondorzsyscall.a(remote_startup.o): In 
> > function `MAIN': 
> > /home/condor/execute/dir_8777/userdir/src/condor_syscall_lib/remote_startup.c:485: 
> > undefined reference to `main' collect2: ld returned 1 exit status
> >
> > What I find strange is that mysterious path: 
> > "/home/condor/execute/dir_8777/userdir/src/condor_syscall_lib" which 
> > does not exist on my machine. Am I to assume that this is an artefact of 
> > Condor's build environment at UWCS? As for a "main" function, it is 
> > certainly in the .o files I'm linking together as without the 
> > condor_compile directive the code builds cleanly (I'm using g++ v3.4).
> >
> > Can anyone shed light as to what the problem may be?
> >
> > Ta,
> > Mark
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--
Dr Mark Calleja
Cambridge eScience Centre, University of Cambridge
Centre for Mathematical Sciences, Wilberforce Road, Cambridge CB30WA
Tel. (+44/0) 1223 765317, Fax  (+44/0) 1223 765900
http://www.escience.cam.ac.uk/~mcal00