[CMake] using ExternalProject_Add when cmake is launched

[Stéphane Ancelot]

include(ExternalProject)

ExternalProject_Add(
     WIN32DEPSV2
     PREFIX ${CMAKE_CURRENT_BINARY_DIR}/WIN32DEPSV2
     DOWNLOAD_DIR .
     STAMP_DIR ./stamps
     SOURCE_DIR   WIN32DEPSV2
     GIT_REPOSITORY git at numagit.numalliance.com:THIRD_PARTIES/WIN32DEPS.git
     CONFIGURE_COMMAND ""
     BUILD_COMMAND ""
     BUILD_IN_SOURCE 1
     INSTALL_COMMAND ""
)

add_library(your_other_target ...)

add_dependencies(your_other_target WIN32DEPSV2)

find_package(Freetype REQUIRED QUIET)


Launching cmake does not clone the git folder , but continues and fails 
with the find_package command

CMake Error at 
/usr/local/cmake-3.10.3-Linux-x86_64/share/cmake-3.10/Modules/FindPackageHandleStandardArgs.cmake:137 
(message):
   Could NOT find Freetype (missing: FREETYPE_LIBRARY FREETYPE_INCLUDE_DIRS)
Call Stack (most recent call first):
/usr/local/cmake-3.10.3-Linux-x86_64/share/cmake-3.10/Modules/FindPackageHandleStandardArgs.cmake:378 
(_FPHSA_FAILURE_MESSAGE)
/usr/local/cmake-3.10.3-Linux-x86_64/share/cmake-3.10/Modules/FindFreetype.cmake:157 
(find_package_handle_standard_args)
   FOX64/CMakeLists.txt:919 (find_package)

Le 02/05/2018 à 09:32, Kai Wolf a écrit :
> You probably need to manually add a dependency from your 
> ExternalProject to your target that needs the libraries.
> For instance
>
> ExternalProject_Add(fetch_win32_libs ...)
> add_library(your_other_target ...)
>
>
> Greetings
>
> Kai Wolf
>
> http://kai-wolf.me/
> kai.wolf at gmail.com <mailto:kai.wolf at gmail.com>
>
> 2018-05-02 8:47 GMT+02:00 Stéphane Ancelot <sancelot at numalliance.com 
> <mailto:sancelot at numalliance.com>>:
>
>     Hi,
>
>     I have got some win32 libraries dependencies stored in a project .
>
>     Then I added ExternalProject_Add at beginning of my cmakelists
>     file in order to clone this dependency to be available.
>
>     and then provide the root path as follow:
>
>     SET(CMAKE_FIND_ROOT_PATH /usr/i586-mingw32msvc
>     ${CMAKE_CURRENT_SOURCE_DIR}/WIN32DEPS/JPEGLIB/jpegsrc-9c
>     ${CMAKE_CURRENT_SOURCE_DIR}/WIN32DEPS/zlib-1.2.3-lib
>     ${CMAKE_CURRENT_SOURCE_DIR}/WIN32DEPS/libpng-1.2.37-lib
>     ${CMAKE_CURRENT_SOURCE_DIR}/WIN32DEPS/ftgl-binary
>     ${CMAKE_CURRENT_SOURCE_DIR}/WIN32DEPS/freetype-dev_2.4.2-1
>     ${CMAKE_CURRENT_SOURCE_DIR}/WIN32DEPS/iconv-1.9.2.1
>                             )
>
>
>     unfortunately, the project is not cloned when cmake is launched
>     and the next dependencies don't find the packages :-(
>
>     What Can I do ?
>
>     Regards,
>
>     S.Ancelot
>     -- 
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