[CMake] file property SWIG_FLAGS results in NOTFOUND

[Brad King]

Axel Wachtler wrote:
> Hallo all,
> 
> I use cmake in a project under mingw and under linux, so the
> Makefile Generator is "Unix Makefiles".
> 
> Currently with Swig, two issues coming up (may be coming from
> layer 8, e.g. from the guy sitting in front of the terminal).
> 
> 
> (1)
> I just tried to use the cmake example at swig.org.
> 
> When I run the example I get in the Makefile
> 
> /usr/bin/swig -python NOTFOUND -c -I/usr/include/python2.3 \
>  -I/mnt/net/axel/1/scratch/cmake_vortrag/src/Cmswig/build
> 
> It seems that NOTFOUND is coming from
> SET_SOURCE_FILES_PROPERTIES(../Source/example.i
>     PROPERTIES SWIG_FLAGS ... )
> 
> I did a workaround while copying UseSWIG.cmake to a local
> dir and fix it by commenting out the use of the SWIG_FLAGS
> file property.
> 
> Also I would suggest to remove the hardcoded "-c"
> from UseSWIG.cmake, because it means raw wrapper code,
> so that a C file can not get linked properly.
> This could be set by the user, if needed.

Please report this as a bug here:

http://www.cmake.org/Bug

> (2)
> The second question is, I want to add a custom file generator
> before swig is called (a Python script, which generates
> another swig module),  how I can do this? I could not find a
> valid target  name, to use in  ADD_CUSTOM_(TARGET|COMMAND).

You don't actually need a target name.  That is the old custom command 
format.  Just specify as an OUTPUT a file that is used as an input by 
the swig macro.  The generation rule should automatically be put in the 
right place.

-Brad