重新扫描CMake并传递参数

Question

我正在制作一个带有外部项目的CMAKE文件。我在这里的例子如下： CMake ExternalProject_Add() and FindPackage()

但是，我有一个问题。当我打电话给cmake时，我使用cmake -G "MinGW Makefiles" ..。不幸的是，-G参数似乎没有传递给重新扫描目标。如何将适用的Cmake命令传递给任何重新扫描？

我觉得这是我需要改变

add_custom_target(Rescan ${CMAKE_COMMAND} ${CMAKE_SOURCE_DIR} DEPENDS Eigen3) 

这里的线是的CMakeLists.txt：

find_package(Dep1) 

include (ExternalProject) 
ExternalProject_Add (
        Dep1 
        SVN_REPOSITORY https://svn.company.nl/svn/Dep1-trunk 
        SVN_REVISION -rHEAD 
        TIMEOUT 10 
) 

if (NOT Dep1_FOUND) 
    add_custom_target(Rescan ${CMAKE_COMMAND} ${CMAKE_SOURCE_DIR} DEPENDS Dep1) 
else (NOT Dep1_FOUND) 
    add_custom_target(Rescan) 
endif (NOT Dep1_FOUND) 

#build app 
add_executable(Testapp main.cpp) 
add_dependencies(Testapp Rescan) 

if (${Dep1_FOUND}) 
    target_include_directories(Testapp PUBLIC ${Dep1_INCLUDE_DIR}) 
    target_link_libraries(Testapp ${Dep1_LIBRARY}) 
endif (${Dep1_FOUND}) 

#Install package 
install(TARGETS Testapp EXPORT ${PROJECT_NAME}Targets 
    RUNTIME DESTINATION bin 
) 

Answer 1

当然，只需拨打

add_custom_target(Rescan ${CMAKE_COMMAND} -G ${CMAKE_GENERATOR} ${CMAKE_SOURCE_DIR} DEPENDS Eigen3) 

为CMAKE_GENERATOR见文档变量。