Hi, the following case does not work: $ cat CMakeLists.txt project(foo CXX) find_package(Qt4) $ cmake . -- Check for working CXX compiler: /usr/bin/c++ -- Check for working CXX compiler: /usr/bin/c++ -- works -- Looking for Q_WS_X11 CMake Error: Unknown extension ".c" for file "/home/hendrik/test/CMakeFiles/CMakeTmp/CheckSymbolExists.c". TRY_COMPILE only works for enabled languages. Currently enabled languages are: CXX See PROJECT command for help enabling other languages. -- Looking for Q_WS_X11 - not found. -- Looking for Q_WS_MAC CMake Error: Unknown extension ".c" for file "/home/hendrik/test/CMakeFiles/CMakeTmp/CheckSymbolExists.c". TRY_COMPILE only works for enabled languages. Currently enabled languages are: CXX See PROJECT command for help enabling other languages. -- Looking for Q_WS_MAC - not found. -- Looking for Q_WS_WIN CMake Error: Unknown extension ".c" for file "/home/hendrik/test/CMakeFiles/CMakeTmp/CheckSymbolExists.c". TRY_COMPILE only works for enabled languages. Currently enabled languages are: CXX See PROJECT command for help enabling other languages. -- Looking for Q_WS_WIN - not found. -- Found Qt-Version 4.2.2 -- Configuring done
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