Re: linker error libcygwin

[Philipp Kraus <philipp dot kraus at flashpixx dot de>]

On 2011-11-13 12:43:37 +0100, Philipp Kraus said:

> On 2011-11-11 01:57:48 +0100, Greg Chicares said:
>
> > On 2011-11-10 21:22Z, Philipp Kraus wrote:
> > > On 2011-11-10 22:11:48 +0100, Greg Chicares said:
> > >
> > > > On 2011-11-10 20:39Z, Kraus Philipp wrote:
> > > > > undefined reference to `_WinMain@16'
> > > > > collect2: ld returned 1 exit status
> > > >
> > > > Does this thread
> > > > http://cygwin.com/ml/cygwin/2011-10/threads.html#00440
> > > > contain the answer?
> > >
> > > no, sorry.
> > >
> > > > If this is a console application, does it have
> > > > an implementation of main()?
> > >
> > > yes the signature of the main is in this example:
> > > int main(int argc, char* argv[])
> >
> > Please show the full linker command, and indicate the name of
> > the object file that contains main().
>
> The full linker command shows (I split the flags for a better reading):
>
> g++ -o build/target.exe -mconsole -enable-stdcall-fixup -mthread 
> examples/other/target.o
>
> -L/usr/local/bin
> -L/usr/bin
> -L/cygdrive/c/Windows/system32
> -L/cygdrive/c/Windows
> -L/cygdrive/c/Windows/system32/Wbem
> -L/cygdrive/c/Windows/system32/WindowsPowerShell/v1.0
> "-L/cygdrive/c/Program Files/TortoiseSVN/bin"
> "-L/cygdrive/c/Program Files/Java/jdk1.6.0_29/bin"
> -L/cygdrive/c/opt/scons/bin
> -L/cygdrive/c/opt/library/atlas/3.9.51/lib
> -L/cygdrive/c/opt/library/boost/1.47.0/bin
> -L/cygdrive/c/opt/library/boost/1.47.0/lib
> -L/cygdrive/c/opt/library/cln/1.3.2/lib
> -L/cygdrive/c/opt/library/ginac/1.6.1/lib
> -L/cygdrive/c/opt/library/hdf/5-1.8.7/lib
> -L/cygdrive/c/opt/library/xml2/2.7.8/bin
> -L/cygdrive/c/opt/library/xml2/2.7.8/lib
> -L/cygdrive/c/opt/library/jsoncpp/0.5.0/lib
>
> -lboost_system
> -lboost_thread
> -lboost_iostreams
> -lboost_regex
> -lboost_program_options
> -lboost_exception
> -lboost_filesystem
> -llapack
> -lcblas
> -lf77blas
> -latlas
> -lgfortran
> -lhdf5_cpp
> -lhdf5
>
> I have tested the same call with another example (only the *.cpp / *.o 
> file changes) and it works. The difference is the cpp code, but
> a compiler call run's without an error. I don't understand why 
> different sources with the same linker command creates different 
> results.
> The linking process should be deterministic, so the compiled object 
> code creates the same linker calls.

I have checked my sources, but some examples must have this preprocessor part:
#if defined(_WIN32) || defined(__CYGWIN__)
#include <windows.h>
#endif

and some examples must not have this part (same linker / compiler call)



--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple