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Completely disable git/svn version checking if not needed.

Browse Source 
Working with git on a branch I find it really annoying that committing
a change causes ninja to think that stuff needs to be rebuilt.

With this change at least nothing in llvm needs to be rebuild when
something is committed.

llvm-svn: 306858
This commit is contained in:
Rafael Espindola 2017-06-30 18:48:33 +00:00
parent 4e3c0d7882
commit 444f6a8d61
3 changed files with 25 additions and 22 deletions
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2
CMakeLists.txt
View File

@ -206,7 +206,7 @@ endif()
include(VersionFromVCS)
option(LLVM_APPEND_VC_REV
"Append the version control system revision id to LLVM version" OFF)
"Embed the version control system revision id in LLVM" ON)
if( LLVM_APPEND_VC_REV )
add_version_info_from_vcs(PACKAGE_VERSION)

7
docs/CMake.rst
View File

@ -247,9 +247,10 @@ LLVM-specific variables
tests.
**LLVM_APPEND_VC_REV**:BOOL
Append version control revision info (svn revision number or Git revision id)
to LLVM version string (stored in the PACKAGE_VERSION macro). For this to work
cmake must be invoked before the build. Defaults to OFF.
Embed version control revision info (svn revision number or Git revision id).
This is used among other things in the LLVM version string (stored in the
PACKAGE_VERSION macro). For this to work cmake must be invoked before the
build. Defaults to ON.
**LLVM_ENABLE_THREADS**:BOOL
Build with threads support, if available. Defaults to ON.

38
include/llvm/Support/CMakeLists.txt
View File

@ -9,25 +9,27 @@ function(find_first_existing_file out_var)
endfunction()
macro(find_first_existing_vc_file out_var path)
find_program(git_executable NAMES git git.exe git.cmd)
# Run from a subdirectory to force git to print an absolute path.
execute_process(COMMAND ${git_executable} rev-parse --git-dir
WORKING_DIRECTORY ${path}/cmake
RESULT_VARIABLE git_result
OUTPUT_VARIABLE git_dir
ERROR_QUIET)
if(git_result EQUAL 0)
string(STRIP "${git_dir}" git_dir)
set(${out_var} "${git_dir}/logs/HEAD")
# some branchless cases (e.g. 'repo') may not yet have .git/logs/HEAD
if (NOT EXISTS "${git_dir}/logs/HEAD")
file(WRITE "${git_dir}/logs/HEAD" "")
if ( LLVM_APPEND_VC_REV )
find_program(git_executable NAMES git git.exe git.cmd)
# Run from a subdirectory to force git to print an absolute path.
execute_process(COMMAND ${git_executable} rev-parse --git-dir
WORKING_DIRECTORY ${path}/cmake
RESULT_VARIABLE git_result
OUTPUT_VARIABLE git_dir
ERROR_QUIET)
if(git_result EQUAL 0)
string(STRIP "${git_dir}" git_dir)
set(${out_var} "${git_dir}/logs/HEAD")
# some branchless cases (e.g. 'repo') may not yet have .git/logs/HEAD
if (NOT EXISTS "${git_dir}/logs/HEAD")
file(WRITE "${git_dir}/logs/HEAD" "")
endif()
else()
find_first_existing_file(${out_var}
"${path}/.svn/wc.db" # SVN 1.7
"${path}/.svn/entries" # SVN 1.6
)
endif()
else()
find_first_existing_file(${out_var}
"${path}/.svn/wc.db" # SVN 1.7
"${path}/.svn/entries" # SVN 1.6
)
endif()
endmacro()