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-rw-r--r--cmake/GetGitRevisionDescription.cmake8
1 files changed, 7 insertions, 1 deletions
diff --git a/cmake/GetGitRevisionDescription.cmake b/cmake/GetGitRevisionDescription.cmake
index 1e0968ec3b..5044c682e4 100644
--- a/cmake/GetGitRevisionDescription.cmake
+++ b/cmake/GetGitRevisionDescription.cmake
@@ -42,7 +42,13 @@ set(__get_git_revision_description YES)
get_filename_component(_gitdescmoddir ${CMAKE_CURRENT_LIST_FILE} PATH)
function(get_git_dir _gitdir)
- # check GIT_DIR in environment first
+ # check FORCED_GIT_DIR first
+ if(FORCED_GIT_DIR)
+ set(${_gitdir} ${FORCED_GIT_DIR} PARENT_SCOPE)
+ return()
+ endif()
+
+ # check GIT_DIR in environment
set(GIT_DIR $ENV{GIT_DIR})
if(NOT GIT_DIR)
set(GIT_PARENT_DIR ${CMAKE_CURRENT_SOURCE_DIR})