[CMake] make - cannot open output file . (dot)

[tom at unforbidable.com]

> tom at unforbidable.com wrote:
> > So I tried to set EXECUTABLE_OUTPUT_PATH to the same
> > path as PROJECT_BINARY_DIR like so:
> > 
> > SET(EXECUTABLE_OUTPUT_PATH "${PROJECT_BINARY_DIR}" CACHE
> > PATH "Single output directory for building all
> > executables." FORCE)
> > 
> > This works on Windows (nmake makefiles) but when using
> > cmake on Gentoo (standard unix makefiles) and calling
> > make then I get the following:
> > 
> > Scanning dependencies of target libfurc
> > [ 50%] Building CXX object
> >
> >
> libfurc/CMakeFiles/libfurc.dir/base/furcadiasettings.cpp.o
> /home/tom/opendreamer/src/libfurc/base/furcadiasettings.cp
> > p:26:2: warning: no newline at end of file
> > Linking CXX static library liblibfurc.a
> > [ 50%] Built target libfurc
> > Scanning dependencies of target tstfurcsettings
> > [100%] Building CXX object
> >
> >
> tstfurcsettings/CMakeFiles/tstfurcsettings.dir/main.cpp.o
> > Linking CXX executable .
> /usr/lib/gcc/i686-pc-linux-gnu/4.1.2/../../../../i686-pc-l
> > inux-gnu/bin/ld: cannot open output file .: Is a
> > directory collect2: ld returned 1 exit status
> > make[2]: *** [tstfurcsettings] Error 1
> > make[1]: ***
> > [tstfurcsettings/CMakeFiles/tstfurcsettings.dir/all]
> > Error 2 make: *** [all] Error 2
> > 
> > The dot is clearly there.  I got rid of the error by
> > setting the path like so:
> > 
> > SET(EXECUTABLE_OUTPUT_PATH "${PROJECT_BINARY_DIR}/bin"
> > CACHE PATH "Single output directory for building all
> > executables." FORCE)
> > 
> > Both cmakes are the same version (2.6-patch 4). 
> > 
> > I don't think I am doing anything wrong although this is
> > my first day with cmake.  I decided to post this in case
> > it was not an known problem.  I obviously failed to
> > google anything up because the key word is . (dot).
> > 
> Sounds like you created an executable with the name "."
> somehow...  What  does your add_executable line look like?
> 
> -Bill

It's just that:
ADD_EXECUTABLE(tstfurcsettings main.cpp)

Then again, the makefile is generated correctly on Windows:
Linking CXX executable ..\tstfurcsettings.exe
[100%] Built target tstfurcsettings

It could be a bug in the Gentoo port of cmake.

Tomas