[benchmark] Disable CMake get_git_version

Disabled CMake get_git_version as it is meaningless for this in-tree
build, and hardcoded a null version.

Not using get_git_version avoids a refresh of the git index that is
executed by get_git_version. Refreshing the index can take a
considerable amount of time if the index needs to be refreshed
(particularly with the mono repo). This situation can arise when
building shared source on a host in VMs.

Differential Revision: https://reviews.llvm.org/D63925

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@364742 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/utils/benchmark/CMakeLists.txt b/utils/benchmark/CMakeLists.txt
index 788ad48d1c4d55932f820395fd8927cd10d3f881..38bc8c6bc9560c0d9a5e7d217702fa1b780f61ce 100644 (file)
--- a/utils/benchmark/CMakeLists.txt
+++ b/utils/benchmark/CMakeLists.txt
@@ -76,8 +76,11 @@ list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 
 
 # Read the git tags to determine the project version
-include(GetGitVersion)
-get_git_version(GIT_VERSION)
+# WARNING: This is meaningless for when the benchmark library is being built in-tree,
+# so disable it and hardcode a null version.
+# include(GetGitVersion)
+# get_git_version(GIT_VERSION)
+set(GIT_VERSION "v0.0.0")
 
 # Tell the user what versions we are using
 string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" VERSION ${GIT_VERSION})

diff --git a/utils/benchmark/README.LLVM b/utils/benchmark/README.LLVM
index 5a20ec665ad070e48ddefe7d8c6cb63aeec9c6c0..c493ff4f5c641c86f6a3c632f635f0e2dc62222b 100644 (file)
--- a/utils/benchmark/README.LLVM
+++ b/utils/benchmark/README.LLVM
@@ -21,3 +21,5 @@ Changes:
   is applied to fix building with MinGW headers for ARM
 * https://github.com/google/benchmark/commit/a9b31c51b1ee7ec7b31438c647123c2cbac5d956
   is applied to disable exceptions in Microsoft STL when exceptions are disabled
+* Disabled CMake get_git_version as it is meaningless for this in-tree build,
+  and hardcoded a null version