[CMake] How to make FILE() append to the list of files?

[Robert Dailey]

On Thu, Nov 27, 2008 at 2:31 PM, Alexander Neundorf <a.neundorf-work at gmx.net
> wrote:

> On Thursday 27 November 2008, Eric Noulard wrote:
> > 2008/11/27 Robert Dailey <rcdailey at gmail.com>:
> > >> find . -name "*.c" > source_files.txt
> > >> edit source_files.txt and put that list of files exiplicitly into a
> > >> CMakeLists.txt file.
> > >>
> > >> file(GLOB is a bad way to get source lists for CMake.   CMake has no
> way
> > >> of knowing when new files have been put in the directory.
> > >
> > > But unless I am missing a fundamental feature somewhere, GLOB still
> seems
> > > to be the better alternative. While it may not intrinsically know when
> > > new files have appeared on the filesystem, the programmer can simply
> > > re-run the CMake command to get an updated project with the newly added
> > > source files without editing the CMakeLists.txt file directly.
> >
> > Yes but when he add a source file, he won't necessarily remember he
> > MUST rerun CMake manually
> > so its next attempt to "build"  the project will trigger either a
> > compile error (added header missing)
> > or link error (added source file not compiled).
> >
> > Whereas with hard-written sources files in CMakeLists.txt, the user
> > will get accustomed to
> > "simple" CMakeList.txt editing thus CMake will relaunch itself
> > automatically when needed and
> > in particular when a CMakeLists.txt is changed.
>
> Additionally it can happen from time to time that there are files in the
> directories which you just started to write, or forgot to delete, or
> somebody
> else sent you, or... and which you don't want to build, but which would be
> found by the glob.
> So, yes, put the files you want to have explicitely in your cmake files.


Okay, so if I hard-code the list of files to compile, I still need to create
1 CMakeLists.txt file for each of the 20 directories containing CPP files to
compile. However, this is simply to modularize the CMake script itself. I
suppose I could use include() instead of add_subdirectory()?
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