vasilito
cf12defd28
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
53 lines
1.7 KiB
CMake
53 lines
1.7 KiB
CMake
# SPDX-FileCopyrightText: 2007 Alexander Neundorf <neundorf@kde.org>
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#
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# SPDX-License-Identifier: BSD-3-Clause
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#[=======================================================================[.rst:
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ECMOptionalAddSubdirectory
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--------------------------
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Make subdirectories optional.
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::
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ecm_optional_add_subdirectory(<dir>)
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This behaves like ``add_subdirectory()``, except that it does not complain if the
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directory does not exist. Additionally, if the directory does exist, it
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creates an option to allow the user to skip it. The option will be named
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BUILD_<dir>.
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This is useful for "meta-projects" that combine several mostly-independent
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sub-projects.
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If the CMake variable ``DISABLE_ALL_OPTIONAL_SUBDIRECTORIES`` is set to ``TRUE`` for
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the first CMake run on the project, all optional subdirectories will be
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disabled by default (but can of course be enabled via the respective options).
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For example, the following will disable all optional subdirectories except the
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one named "foo":
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.. code-block:: sh
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cmake -DDISABLE_ALL_OPTIONAL_SUBDIRECTORIES=TRUE -DBUILD_foo=TRUE myproject
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Since pre-1.0.0.
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#]=======================================================================]
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function(ECM_OPTIONAL_ADD_SUBDIRECTORY _dir)
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get_filename_component(_fullPath ${_dir} ABSOLUTE)
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if(EXISTS ${_fullPath}/CMakeLists.txt)
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if(DISABLE_ALL_OPTIONAL_SUBDIRECTORIES)
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set(_DEFAULT_OPTION_VALUE FALSE)
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else()
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set(_DEFAULT_OPTION_VALUE TRUE)
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endif()
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if(DISABLE_ALL_OPTIONAL_SUBDIRS AND NOT DEFINED BUILD_${_dir})
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set(_DEFAULT_OPTION_VALUE FALSE)
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endif()
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option(BUILD_${_dir} "Build directory ${_dir}" ${_DEFAULT_OPTION_VALUE})
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if(BUILD_${_dir})
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add_subdirectory(${_dir})
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endif()
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endif()
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endfunction()
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