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5e6f018471
Summary: For Incremental LTO, we need to make sure that an old cache entry is not used when incrementally re-linking with a new libLTO. Adding a global LLVM_REVISION in llvm-config.h would for to rebuild/relink the world for every "git pull"/"svn update". So instead only libLTO is made dependent on the VCS and will be rebuilt (and the dependent binaries relinked, i.e. as of today: libLTO.dylib and llvm-lto). Reviewers: beanz Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D18987 From: Mehdi Amini <mehdi.amini@apple.com> llvm-svn: 266523
40 lines
1.2 KiB
CMake
40 lines
1.2 KiB
CMake
# CMake project that writes Subversion revision information to a header.
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#
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# Input variables:
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# SRC - Source directory
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# HEADER_FILE - The header file to write
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#
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# The output header will contain macros FIRST_REPOSITORY and FIRST_REVISION,
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# and SECOND_REPOSITORY and SECOND_REVISION if requested, where "FIRST" and
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# "SECOND" are substituted with the names specified in the input variables.
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# Chop off cmake/modules/GetSVN.cmake
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get_filename_component(LLVM_DIR "${CMAKE_SCRIPT_MODE_FILE}" PATH)
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get_filename_component(LLVM_DIR "${LLVM_DIR}" PATH)
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get_filename_component(LLVM_DIR "${LLVM_DIR}" PATH)
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set(CMAKE_MODULE_PATH
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${CMAKE_MODULE_PATH}
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"${LLVM_DIR}/cmake/modules")
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include(VersionFromVCS)
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# Handle strange terminals
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set(ENV{TERM} "dumb")
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function(append_info name path)
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add_version_info_from_vcs(REVISION ${path})
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string(STRIP "${REVISION}" REVISION)
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file(APPEND "${HEADER_FILE}.txt"
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"#define ${name} \"${REVISION}\"\n")
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endfunction()
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append_info(${NAME} "${SOURCE_DIR}")
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# Copy the file only if it has changed.
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execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different
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"${HEADER_FILE}.txt" "${HEADER_FILE}")
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file(REMOVE "${HEADER_FILE}.txt")
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