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Make LLVM_APPEND_VC_REV=OFF affect clang, lld, and lldb as well.

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When LLVM_APPEND_VC_REV=OFF is set, the current git hash is no
longer embedded into binaries (mostly for --version output).
Without it, most binaries need to relink after every single
commit, even if they didn't change otherwise (due to, say,
a documentation-only commit).

LLVM_APPEND_VC_REV is ON by default, so this doesn't change the
default behavior of anything.

With this, all clients of GenerateVersionFromVCS.cmake honor
LLVM_APPEND_VC_REV.

Differential Revision: https://reviews.llvm.org/D72855
This commit is contained in:
Nico Weber 2020-01-16 19:04:08 -05:00
parent 6bae49b565
commit 6be5d5bda8
2 changed files with 3 additions and 1 deletions
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2
cmake/modules/LLVMConfig.cmake.in
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@ -78,6 +78,8 @@ set(LLVM_LIBDIR_SUFFIX @LLVM_LIBDIR_SUFFIX@)
set(LLVM_INCLUDE_DIRS "@LLVM_CONFIG_INCLUDE_DIRS@")
set(LLVM_LIBRARY_DIRS "@LLVM_CONFIG_LIBRARY_DIRS@")
set(LLVM_APPEND_VC_REV "@LLVM_APPEND_VC_REV@")
# These variables are duplicated for install tree but they have different
# values for build tree. LLVM_INCLUDE_DIRS contains both source
# and generated include directories while the following variables have

2
docs/CMake.rst
View File

@ -272,7 +272,7 @@ LLVM-specific variables
Generate build targets for the LLVM benchmarks. Defaults to ON.
**LLVM_APPEND_VC_REV**:BOOL
Embed version control revision info (svn revision number or Git revision id).
Embed version control revision info (Git revision id).
The version info is provided by the ``LLVM_REVISION`` macro in
``llvm/include/llvm/Support/VCSRevision.h``. Developers using git who don't
need revision info can disable this option to avoid re-linking most binaries