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-rw-r--r--clang/CMakeLists.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/clang/CMakeLists.txt b/clang/CMakeLists.txt
index 514cea16ff9..bdd0ec91240 100644
--- a/clang/CMakeLists.txt
+++ b/clang/CMakeLists.txt
@@ -595,6 +595,11 @@ endif()
set(CLANG_ORDER_FILE ${CMAKE_CURRENT_BINARY_DIR}/clang.order CACHE FILEPATH
"Order file to use when compiling clang in order to improve startup time.")
+file(READ ${CLANG_ORDER_FILE} order_file 20)
+if(order_file STREQUAL "")
+ file(REMOVE ${CLANG_ORDER_FILE})
+endif()
+
if(CLANG_ORDER_FILE AND NOT EXISTS ${CLANG_ORDER_FILE})
file(WRITE ${CLANG_ORDER_FILE} "\n")
endif()
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