[CMake] Cannot add target-level dependencies to non-existent target

[Glenn Coombs]

I've not come across the target_sources command before - is it new in 3.1.3
?  From reading the documentation it looks like it allows one to add
sources to a target *after* the target has been created via add_library or
add_executable.  If that is true then that could be a very useful command.
I will investigate further but it could be just what I need.

--
Glenn

On 30 June 2015 at 22:34, Stephen Kelly <steveire at gmail.com> wrote:

> Glenn Coombs wrote:
>
> > I am getting the error in the subject.  The code I have looks like this:
> >
> >     if (PRE_COMPILED_HEADERS_FOUND)
> >         ADD_PRECOMPILED_HEADER(${header_pch} ${source_pch} sources
> >         systemc)
> >     endif()
> >
> >     add_library(systemc ${sources} ${sources_no_pch} ${headers})
> >
>
> Use target_sources after the target is created.
>
>  add_library(systemc ${sources} ${headers})
>  if (PRE_COMPILED_HEADERS_FOUND)
>    ADD_PRECOMPILED_HEADER(${header_pch} ${source_pch} pch_files systemc)
>    target_sources(systemc PRIVATE ${pch_files})
>  endif()
>
> Thanks,
>
> Steve.
>
>
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