Build fails after adding sources, headers or widgets to scopes (win32, unix, mac etc.)

What steps will reproduce the problem?
1. Create a project and add a few sources, headers and some widgets
2. Add a scope (win32 if working in Windows) and add sources and headers to
that scope.
3. Start Build

What is the expected output? What do you see instead?
Compilation is expected to build all source files including those in the
scope variable (win32 if working in Windows). Instead, only the last files
 get compiled. Build fails.

What version of the product are you using? On what operating system?
Version 0.20 and 0.21 have been tried. Operating system: Windows (MinGW
compiler).

Please provide any additional information below.
Only QT and CONFIG variables are provided with the += operator in the 
project (.pro) file when saving the project. A solution would be to use +=
for SOURCES, HEADERS, FORMS and other variables as well. Possibly the *=
operator.

Original issue reported on code.google.com by mwi...@yahoo.se on 22 Nov 2006 at 7:46

tonkv / qdevelop

Build fails after adding sources, headers or widgets to scopes (win32, unix, mac etc.) #41