[Moved] qmake and pro files question

[petro.kazmirchuk]

Hello!
I have Qt SDK 1.1 (installed with online installer) on Windows + MinGW.
And I have a few misunderstandings with *.pro files usage.

1. When I use this:
   @CONFIG(release, debug|release) {
   message("in release")
   } else {
   message("in debug")
   }@
   and compile in release mode, I get the following output:
   Project MESSAGE: in release
   Project MESSAGE: in release
   Project MESSAGE: in debug
   Why do I get 3 messages instead of 1? why they are different?
   When I compile in debug mode, I get the following output:
   Project MESSAGE: in debug
   Project MESSAGE: in debug
   Project MESSAGE: in release
2. From the documentation about CONFIG variable:
   "Since the debug option overrides the release option when both are defined in the CONFIG variable..."
   is it really true?
3. If I use the syntax
   @<condition> {
   <command or definition>
   }@
   from what sources qmake finds out whether <condition> is true or false, besides CONFIG var?
4. About a year ago I read an article here that Qt software is considering migration to another build system (e.g. CMake) or developing its own. Are there any news in this area?
   Thanks in advance.

[jobor]

1. The reason why you get three messages is the following: qmake goes through three stages when generating the Makefile(s) for your project. Once for debug, release and the metamakefile.

See the description of debug_and_release and build_pass here http://doc.qt.nokia.com/4.7/qmake-variable-reference.html#config for more insight.

2. Yes its true. :)

3. http://doc.qt.nokia.com/4.7/qmake-advanced-usage.html#scopes

4. We're currently investigating. Nothing concrete yet.