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-rw-r--r--externals/cmake-modules/GetGitRevisionDescription.cmake.in8
1 files changed, 6 insertions, 2 deletions
diff --git a/externals/cmake-modules/GetGitRevisionDescription.cmake.in b/externals/cmake-modules/GetGitRevisionDescription.cmake.in
index 888ce13aa..0d7eb3c26 100644
--- a/externals/cmake-modules/GetGitRevisionDescription.cmake.in
+++ b/externals/cmake-modules/GetGitRevisionDescription.cmake.in
@@ -33,6 +33,10 @@ else()
endif()
if(NOT HEAD_HASH)
- file(READ "@GIT_DATA@/head-ref" HEAD_HASH LIMIT 1024)
- string(STRIP "${HEAD_HASH}" HEAD_HASH)
+ if(EXISTS "@GIT_DATA@/head-ref")
+ file(READ "@GIT_DATA@/head-ref" HEAD_HASH LIMIT 1024)
+ string(STRIP "${HEAD_HASH}" HEAD_HASH)
+ else()
+ set(HEAD_HASH "Unknown")
+ endif()
endif()