I have been reading this: https://cmake.org/cmake/help/v3.0/module/ExternalProject.html
trying to add sdl external project but I am having issues. I created a new cmake project to test. I already downloaded the sdl library and can build it correctly by manually calling cmake commands but this is how I'd like to distribute sdl w/ my library. here's my new test cmake: cmake_minimum_required(VERSION2.8) project(sdl_external) include(ExternalProject) ExternalProject_Add(sdl HG_REPOSITORY clone http://hg.libsdl.org/SDL # PREFIX ${CMAKE_SOURCE_DIR}/sdl # SOURCE_DIR ${CMAKE_SOURCE_DIR}/sdl # INSTALL_COMMAND cmake ../ PREFIX=${CMAKE_CURRENT_BINARY_DIR} ) I get this build output: cmake ../ -- The C compiler identification is GNU 4.9.2 -- The CXX compiler identification is GNU 4.9.2 -- Check for working C compiler: /usr/bin/cc -- Check for working C compiler: /usr/bin/cc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Check for working CXX compiler: /usr/bin/c++ -- Check for working CXX compiler: /usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Found Hg: /usr/bin/hg (found version "3.1.2") -- Configuring done -- Generating done -- Build files have been written to: /home/blubee/sdk/test/build Scanning dependencies of target sdl [ 12%] Creating directories for 'sdl' [ 25%] Performing download step (hg clone) for 'sdl' -- Avoiding repeated hg clone, stamp file is up to date: '/home/blubee/sdk/_b/build/test/ build/sdl-prefix/src/sdl-stamp/sdl-hginfo.txt' [ 37%] No patch step for 'sdl' [ 50%] Performing update step (hg pull) for 'sdl' abort: no repository found in ' /home/blubee/sdk/test/build/sdl-prefix/src/sdl' ( .hg not found)! CMakeFiles/sdl.dir/build.make:89: recipe for target 'sdl-prefix/src/sdl-stamp/sdl-update' failed make[2]: *** [sdl-prefix/src/sdl-stamp/sdl-update] Error 255 CMakeFiles/Makefile2:60: recipe for target 'CMakeFiles/sdl.dir/all' failed make[1]: *** [CMakeFiles/sdl.dir/all] Error 2 Makefile:76: recipe for target 'all' failed make: *** [all] Error 2 my external build file isn't very verbose but I don't get the error why is it reporting that no repository found. abort: no repository found in '/home/blubee/sdk/test/build/sdl-prefix/src/sdl' ( .hg not found)! Why isn't the mercurial project not being downloaded?
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