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Example of using add_custom_command and add_custom_target together in CMake to handle custom build steps with minimal rebuilding: This example untars library headers for an INTERFACE library target
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set(LIBFOO_TAR_HEADERS | |
"${CMAKE_CURRENT_BINARY_DIR}/include/foo/foo.h" | |
"${CMAKE_CURRENT_BINARY_DIR}/include/foo/foo_utils.h" | |
) | |
add_custom_command(OUTPUT ${LIBFOO_TAR_HEADERS} | |
COMMAND ${CMAKE_COMMAND} -E tar xzf "${CMAKE_CURRENT_SOURCE_DIR}/libfoo/foo.tar" | |
COMMAND ${CMAKE_COMMAND} -E touch ${LIBFOO_TAR_HEADERS} | |
WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/include/foo" | |
DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/libfoo/foo.tar" | |
COMMENT "Unpacking foo.tar" | |
VERBATIM | |
) | |
add_custom_target(libfoo_untar DEPENDS ${LIBFOO_TAR_HEADERS}) | |
add_library(foo INTERFACE) | |
target_include_directories(foo INTERFACE "${CMAKE_CURRENT_BINARY_DIR}/include/foo") | |
target_link_libraries(foo INTERFACE ${FOO_LIBRARIES}) |
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