[CMake] multiple source directories

[Andreas Pakulat]

On 28.09.11 12:51:53, pellegrini wrote:
> Hi all,
> 
> I have a project with the following structure:
> 
> root/
>    CMakeLists.txt
>    prog1/
>        CMakeLists.txt
>        Src/
>            file1.f90
>    prog2/
>        CMakeLists.txt
>        Src/
>            file2.f90
> 
> where prog1, prog2 are individual projects.
> 
> I would like to add file1.90 to the build process of prog2. To do
> so, in the CMakeLists.txt file of prog2 project, I put:
> 
>    set(SOURCES ../../prog1/Src/file1.f90
>                            Src/file2.f90)
> and further
>    add_executable(prog2 ${SOURCES})
> 
> when compiling with CMake I get the following error:
> 
> ##############################################
> CMake Error at CMakeLists.txt:35 (add_executable):
>  Cannot find source file:
> 
>    ../../prog1/Src/file1.f90
> 
>  Tried extensions .c .C .c++ .cc .cpp .cxx .m .M .mm .h .hh .h++ .hm
> .hpp  .hxx .in .txx
> ###############################################
> 
> It seems that CMake cna not deal with relative path when declaring
> the sources for a project.

Relative paths work just fine, but your expecting a different base-path
than cmake is. In the above example the current directory when
assembling the sources is root/prog2 not root/prog2/Src which you seem
to assume. Hence you have one ".." too much in your set-line. This
should work:

set( SOURCES ../prog1/Src/file1.f90 Src/file2.f90 )

Andreas