[cmake-developers] Automoc in cmake

[Alexander Neundorf]

On Saturday 04 June 2011, Alexander Neundorf wrote:
> Hi,
> 
> one feature which all KDE developers are used to and which is also used by
> qmake when building Qt is "automoc".
> 
> This means that you don't have to write
> qt4_wrap_cpp(srcs ${filesToBeMoced})
> 
> but instead you simply do
> kde4_add_executable(hello ${srcs})
> and everything including moc is handled automatically.
> 
> This is done so that in your foo.cpp file you include the moc-file e.g. at
> the end:
> 
> -------------------
> 
> Foo::Foo()
> 
> :QObject()
> 
> {
> }
> ...
> 
> void Foo::doSomething()
> {
> }
> 
> #include "foo.moc"

There is now a branch AutomocForQt on the cmake stage.
Docs and a test are still missing.

To enable automoc, set the target property AUTOMOC to TRUE.
As discussed, this is now handled in cmGlobalGenerator::Generate().

There was one more feature which I didn't actually know about:
even without a #include "foo.moc", automoc still parses the source files for 
"Q_OBJECT", and if it finds some, it runs moc and includes all generates moc 
files (which are not used anywhere else) in a generated foo_automoc.cpp file.

Alex
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