[CMake] strange build problems

[Alan W. Irwin]

On 2007-04-06 08:56+0200 Klaas Gadeyne wrote:

> Unfortunately, this was not the case, the line continuation problem is
> due to emacs (which I use for typing emails) in auto-fill-mode (I must have 
> forgotten to turn it of when pasting the dynamic command)
> I'll have a second try pasting the command now disabling autofill...
>
> /usr/bin/g++-3.4  -fPIC 
> `/root/install/xenomai-trunk-2.4.33-ipipe-1.2-08//bin/xeno-config 
> --posix-ldflags` -shared -Wl,-soname,libeml.so -o libeml.so 
> "CMakeFiles/eml-dynamic.dir/al/ethercat_process_data.o" 
> "CMakeFiles/eml-dynamic.dir/al/ethercat_slave_handler.o" 
> "CMakeFiles/eml-dynamic.dir/al/ethercat_AL.o" 
> "CMakeFiles/eml-dynamic.dir/al/ethercat_router.o" 
> "CMakeFiles/eml-dynamic.dir/al/ethercat_slave_conf.o" 
> "CMakeFiles/eml-dynamic.dir/al/ethercat_mbx.o" 
> "CMakeFiles/eml-dynamic.dir/al/ethercat_FSM.o" 
> "CMakeFiles/eml-dynamic.dir/al/ethercat_master.o" 
> "CMakeFiles/eml-dynamic.dir/dll/ethercat_slave_memory.o" 
> "CMakeFiles/eml-dynamic.dir/dll/ethercat_telegram.o" 
> "CMakeFiles/eml-dynamic.dir/dll/ethercat_dll.o" 
> "CMakeFiles/eml-dynamic.dir/dll/ethercat_device_addressed_telegram.o" 
> "CMakeFiles/eml-dynamic.dir/dll/ethercat_frame.o" 
> "CMakeFiles/eml-dynamic.dir/dll/ethercat_logical_addressed_telegram.o" 
> "CMakeFiles/eml-dynamic.dir/arch/RTnet/ethercat_xenomai_drv.o" 
> -L/root/install/xenomai-trunk-2.4.33-ipipe-1.2-08/lib
> g++-3.4: `/root/install/xenomai-trunk-2.4.33-ipipe-1.2-08//bin/xeno-config: 
> No such file or directory
>
> So that appears not to be the problem.

It appears you now have a workaround with EXEC_PROGRAM, but if you want to
follow this up (to help decide the question whether CMake has a bug), I
suggest you make a simple "hello world) style example of the problem which
makes it easy for anybody to replicate the problem.  Use a config programme
that is accessible to most people and which emits linker flags (e.g.,
freetype-config --libs).  Those extra linker flags should not interfere with
the hello-world build, but if there is some general CMake problem with using
"`" and a dynamic library build it should show for the simple example as
well using any config programme that emits linker flags.  OTOH, if
xeno-config has the problem and freetype-config (or whatever) does not with
the simple example, then that is an additional clue about what is causing
trouble for CMake for the xeno-config case.

Alan
__________________________
Alan W. Irwin

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the FreeEOS equation-of-state implementation
for stellar interiors (freeeos.sf.net); PLplot scientific plotting software
package (plplot.org); the Yorick front-end to PLplot (yplot.sf.net); the
Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project
(lbproject.sf.net).
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Linux-powered Science
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