86 lines
2.7 KiB
CMake
86 lines
2.7 KiB
CMake
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set(LLVM_LINK_COMPONENTS
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Core
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MC
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Support
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)
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# Figure out if we can track VC revisions.
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function(find_first_existing_file out_var)
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foreach(file ${ARGN})
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if(EXISTS "${file}")
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set(${out_var} "${file}" PARENT_SCOPE)
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return()
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endif()
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endforeach()
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endfunction()
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macro(find_first_existing_vc_file out_var path)
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set(git_path "${path}/.git")
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# Normally '.git' is a directory that contains a 'logs/HEAD' file that
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# is updated as modifications are made to the repository. In case the
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# repository is a Git submodule, '.git' is a file that contains text that
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# indicates where the repository's Git directory exists.
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if (EXISTS "${git_path}" AND NOT IS_DIRECTORY "${git_path}")
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FILE(READ "${git_path}" file_contents)
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if("${file_contents}" MATCHES "^gitdir: ([^\n]+)")
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# '.git' is indeed a link to the submodule's Git directory.
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# Use the path to that Git directory.
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set(git_path "${path}/${CMAKE_MATCH_1}")
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endif()
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endif()
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find_first_existing_file(${out_var}
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"${git_path}/logs/HEAD" # Git or Git submodule
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"${path}/.svn/wc.db" # SVN 1.7
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"${path}/.svn/entries" # SVN 1.6
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)
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endmacro()
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find_first_existing_vc_file(llvm_vc "${LLVM_MAIN_SRC_DIR}")
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find_first_existing_vc_file(flang_vc "${FLANG_SOURCE_DIR}")
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# The VC revision include that we want to generate.
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set(version_inc "${CMAKE_CURRENT_BINARY_DIR}/SVNVersion.inc")
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set(get_svn_script "${LLVM_CMAKE_PATH}/GetSVN.cmake")
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if(DEFINED llvm_vc AND DEFINED flang_vc)
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# Create custom target to generate the VC revision include.
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add_custom_command(OUTPUT "${version_inc}"
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DEPENDS "${llvm_vc}" "${flang_vc}" "${get_svn_script}"
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COMMAND
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${CMAKE_COMMAND} "-DFIRST_SOURCE_DIR=${LLVM_MAIN_SRC_DIR}"
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"-DFIRST_NAME=LLVM"
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"-DSECOND_SOURCE_DIR=${FLANG_SOURCE_DIR}"
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"-DSECOND_NAME=SVN"
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"-DHEADER_FILE=${version_inc}"
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-P "${get_svn_script}")
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# Mark the generated header as being generated.
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set_source_files_properties("${version_inc}"
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PROPERTIES GENERATED TRUE
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HEADER_FILE_ONLY TRUE)
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# Tell Version.cpp that it needs to build with -DHAVE_SVN_VERSION_INC.
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set_source_files_properties(Version.cpp
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PROPERTIES COMPILE_DEFINITIONS "HAVE_SVN_VERSION_INC")
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else()
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# Not producing a VC revision include.
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set(version_inc)
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# Being able to force-set the SVN revision in cases where it isn't available
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# is useful for performance tracking, and matches compatibility from autoconf.
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if(SVN_REVISION)
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set_source_files_properties(Version.cpp
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PROPERTIES COMPILE_DEFINITIONS "SVN_REVISION=\"${SVN_REVISION}\"")
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endif()
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endif()
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add_flang_library(flangBasic
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LangOptions.cpp
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Version.cpp
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${version_inc}
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)
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