source: Vago/quazip-0.7.2/CMakeLists.txt@ 1089

project (QuaZip)
cmake_minimum_required(VERSION 2.6)

option(BUILD_WITH_QT4 "Build QuaZip with Qt4 no matter if Qt5 was found" OFF)

if( NOT BUILD_WITH_QT4 )
    # try Qt5 first, and prefer that if found
    find_package(Qt5Core QUIET)
endif()

if (Qt5Core_FOUND)
    set(QTCORE_LIBRARIES ${Qt5Core_LIBRARIES})
    set(QUAZIP_LIB_VERSION_SUFFIX 5)
    # if there is no QT_ROOT, try to deduce it from Qt QtCore include
    if ("${QT_ROOT}" STREQUAL "")
        set(QT_ROOT ${QT_QTCORE_INCLUDE_DIR}/../..)
    endif()
    include_directories(${Qt5Core_INCLUDE_DIRS})

    macro(qt_wrap_cpp)
        qt5_wrap_cpp(${ARGN})
    endmacro()
else()
    set(qt_min_version "4.5.0")
    find_package(Qt4 REQUIRED)
    set(QT_USE_QTGUI false)
    include(${QT_USE_FILE})
    include_directories(${QT_INCLUDES})
    set(QTCORE_LIBRARIES ${QT_QTCORE_LIBRARY})

    macro(qt_wrap_cpp)
        qt4_wrap_cpp(${ARGN})
    endmacro()
endif()

# Use system zlib on unix and Qt ZLIB on Windows
IF(UNIX OR MINGW)
        find_package(ZLIB REQUIRED)
ELSE(UNIX)
        SET(ZLIB_INCLUDE_DIRS "${QT_ROOT}/src/3rdparty/zlib" CACHE STRING "Path to ZLIB headers of Qt")
        SET(ZLIB_LIBRARIES "")
        IF(NOT EXISTS "${ZLIB_INCLUDE_DIRS}/zlib.h")
                MESSAGE("Please specify a valid zlib include dir")
        ENDIF(NOT EXISTS "${ZLIB_INCLUDE_DIRS}/zlib.h")
ENDIF(UNIX)

# All build libraries are moved to this directory
SET(LIBRARY_OUTPUT_PATH ${CMAKE_BINARY_DIR})

set(LIB_SUFFIX "" CACHE STRING "Define suffix of directory name (32/64)")
set(LIB_DESTINATION "${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}" CACHE STRING "Library directory name" FORCE)
set(QUAZIP_LIB_TARGET_NAME quazip${QUAZIP_LIB_VERSION_SUFFIX} CACHE
    INTERNAL "Target name of libquazip" FORCE)

add_subdirectory(quazip)

install(FILES FindQuaZip.cmake RENAME FindQuaZip${QUAZIP_LIB_VERSION_SUFFIX}.cmake DESTINATION ${CMAKE_ROOT}/Modules)