MINGW_PREFIX is a better variable name than CC_PREFIX (cross copmling
prefix), therefore rename it. Furthermore define QT_HEADERS_DIR due to
changed logic in CMake's FindQt4 module.
(cherry picked from commit 94ebcf30bc)
MINGW_PREFIX is a better variable name than CC_PREFIX (cross copmling
prefix), therefore rename it. Furthermore define QT_HEADERS_DIR due to
changed logic in CMake's FindQt4 module.
(cherry picked from commit 94ebcf30bc)