[CMake] [PATCH] Qt cross compile with cmake v2.8.4

[Markus Rathgeb]

Hello!

I am using cmake for cross compiling of several Qt applications.
To do this with cmake v2.8.4 I have to change the FindQt4.cmake file.

The variables QT_LIBRARY_DIR, QT_HEADERS_DIR, QT_BINARY_DIR (...) will
already be prefixed with the CMAKE_FIND_ROOT_PATH variable value.
For cross compiling CMAKE_FIND_ROOT_PATH_MODE_LIBRARY and
CMAKE_FIND_ROOT_PATH_MODE_INCLUDE should be set to ONLY (IMHO).

FindQt4 is using NO_DEFAULT_PATH for finding libraries, headers and
binaries, so I had also to add NO_CMAKE_FIND_ROOT_PATH to that calls.

Could you have a look at the attached patch?

Greats,
Markus
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