qt: add cmake test

workaround in #857 allows this to build.
see also #852, a complete solution that covers Qt5 is required

src/qt-test.cmake

@@ -0,0 +1,21 @@
+# This file is part of MXE.
+# See index.html for further information.
+
+# partial module - included by src/cmake/CMakeLists.txt
+
+set(TGT test-${PKG}-cmake)
+
+enable_language(CXX)
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_AUTOUIC ON)
+
+find_package(Qt4 ${PKG_VERSION} EXACT REQUIRED)
+include(${QT_USE_FILE})
+
+add_executable(${TGT} WIN32 ${CMAKE_CURRENT_LIST_DIR}/${PKG}-test.cpp)
+target_link_libraries(${TGT} ${QT_LIBRARIES})
+
+install(TARGETS ${TGT} DESTINATION bin)

src/qt.mk

@@ -122,10 +122,17 @@ define $(PKG)_BUILD
 
     # setup cmake toolchain
     echo 'set(QT_QMAKE_EXECUTABLE $(PREFIX)/$(TARGET)/qt/bin/qmake)' > '$(CMAKE_TOOLCHAIN_DIR)/$(PKG).cmake'
-    # fix static linking errors of QtGui to missing lcms2 and lzma 
+    # fix static linking errors of QtGui to missing lcms2 and lzma
     # introduced by poor libmng linking
-    echo 'set(MNG_LIBRARY mng lcms2 lzma)' >> '$(CMAKE_TOOLCHAIN_DIR)/$(PKG).cmake' 
+    echo 'set(MNG_LIBRARY mng lcms2 lzma)' >> '$(CMAKE_TOOLCHAIN_DIR)/$(PKG).cmake'
 
+    # test cmake
+    mkdir '$(1).test-cmake'
+    cd '$(1).test-cmake' && '$(TARGET)-cmake' \
+        -DPKG=$(PKG) \
+        -DPKG_VERSION=$($(PKG)_VERSION) \
+        '$(PWD)/src/cmake/test'
+    $(MAKE) -C '$(1).test-cmake' -j 1 install
 endef
 
 $(PKG)_BUILD_SHARED = $(subst -static ,-shared ,\