<html><head></head><body>Hi,<br>
<br>
this original makefile rule was probably just a simplification.<br>
Make your custom target depend on all example targets which link the desired parts, then you get what the original makefile author just didn't want to do manually: having built all examples and their dependencies.<br>
And it's less ugly...<br>
<br>
HS<br>
<br><br><div class="gmail_quote">Am 5. Dezember 2014 11:46:03 MEZ, schrieb Petr Kmoch <petr.kmoch@gmail.com>:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div dir="ltr"><div><div><div><div><div>Hi all.<br /><br />I'm converting a small Makefile-based project to CMake. The project is not mine, so I am trying to match its existing buildsystem as closely as possible.<br /><br />One of the rules in the original Makefile is (simplified) as follows:<br /><br /></div>examples: all<br /></div> make -C example_dir all<br /><br /></div>This gives a target 'examples' in the top-level Makefile, which is not included in 'all', but can be used to build all examples. I would like to achieve something similar with CMake.<br /><br /></div>I added example_dir/CMakeLists.txt, which includes a project() command and defines all the targets for example executables. In the toplevel CMakeList, I did this:<br /><br /></div># Add the subdirectory but don't include its targets by default<br /><div>add_subdirectory(example_dir EXCLUDE_FROM_ALL)<br /><br /></div><div># Add a custom target to build all examples<br
/></div><div>add_custom_target(examples ???)<br /><br />I'm stuck at the custom target. What I need for its command is a generator-agnostic equivalent for 'make -C example_dir all' (or 'make -f example_dir/Makefile all').<br /><br /></div><div>I tried 'cmake --build ${CMAKE_CURRENT_BINARY_DIR}/example_dir ...', but this complains that example_dir does not contain a CMakeCache.txt (which is correct of course, it's not the toplevel directory). Then I remembered that build_command() can be used to get a command line to build a project; unfortunately, in 3.0 and later, this just returns 'cmake --build ...' and so is unusable in my situation.<br /><br /></div><div>Is there a way to query CMake for the native command line (or something else) I could use to build the CMake-generated buildsystem in the subdirectory? I thought a bit about CMAKE_MAKE_PROGRAM, but that doesn't tell me anything about what arguments I should pass, and it's not even
set on Visual Studio generators.<br /><br /></div><div>As a workaround, I thought of not doing add_subdirectory() at all and instead adding a custom target with 'ctest --build-and-test ...', but I would prefer to configure & generate the two directories together. I plan to eventually add install() rules for the examples as well, and the examples also use one of the targets from the toplevel cmakelist in add_custom_command(OUTPUT ...), so I would really like to keep them as one CMake system. Is there a way to do so?<br /><br /></div><div>Petr<br /></div></div>
<p style="margin-top: 2.5em; margin-bottom: 1em; border-bottom: 1px solid #000"></p><pre class="k9mail">-- <br /><br />Powered by <a href="http://www.kitware.com">www.kitware.com</a><br /><br />Please keep messages on-topic and check the CMake FAQ at: <a href="http://www.cmake.org/Wiki/CMake_FAQ">http://www.cmake.org/Wiki/CMake_FAQ</a><br /><br />Kitware offers various services to support the CMake community. For more information on each offering, please visit:<br /><br />CMake Support: <a href="http://cmake.org/cmake/help/support.html">http://cmake.org/cmake/help/support.html</a><br />CMake Consulting: <a href="http://cmake.org/cmake/help/consulting.html">http://cmake.org/cmake/help/consulting.html</a><br />CMake Training Courses: <a href="http://cmake.org/cmake/help/training.html">http://cmake.org/cmake/help/training.html</a><br /><br />Visit other Kitware open-source projects at <a
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