diff --git a/cmake/Env.cmake b/cmake/Env.cmake
index 3ea07a672..9a1f5a52b 100644
--- a/cmake/Env.cmake
+++ b/cmake/Env.cmake
@@ -1,4 +1,5 @@
 ob_define(DEBUG_PREFIX "-fdebug-prefix-map=${CMAKE_SOURCE_DIR}=.")
+ob_define(FILE_PREFIX "-ffile-prefix-map=${CMAKE_SOURCE_DIR}=.")
 ob_define(OB_LD_BIN ld)
 ob_define(ASAN_IGNORE_LIST "${CMAKE_SOURCE_DIR}/asan_ignore_list.txt")
 
@@ -59,6 +60,7 @@ if(WITH_COVERAGE)
 
   add_compile_options(${CMAKE_COVERAGE_COMPILE_OPTIONS})
   set(DEBUG_PREFIX "")
+  set(FILE_PREFIX "")
 endif()
 
 ob_define(AUTO_FDO_OPT "")
@@ -251,9 +253,9 @@ if (OB_USE_CLANG)
     set(REORDER_LINK_OPT "-Wl,--no-rosegment,--build-id=sha1 ${HOTFUNC_OPT}")
     set(OB_LD_BIN "${DEVTOOLS_DIR}/bin/ld.lld")
   endif()
-  set(CMAKE_CXX_FLAGS "--gcc-toolchain=${GCC9} ${DEBUG_PREFIX} ${AUTO_FDO_OPT} ${THIN_LTO_OPT} -fcolor-diagnostics ${REORDER_COMP_OPT} -fmax-type-align=8 ${CMAKE_ASAN_FLAG} -std=gnu++11")
-  set(CMAKE_C_FLAGS "--gcc-toolchain=${GCC9} ${DEBUG_PREFIX} ${AUTO_FDO_OPT} ${THIN_LTO_OPT} -fcolor-diagnostics ${REORDER_COMP_OPT} -fmax-type-align=8 ${CMAKE_ASAN_FLAG}")
-  set(CMAKE_CXX_LINK_FLAGS "${LD_OPT} --gcc-toolchain=${GCC9} ${DEBUG_PREFIX} ${AUTO_FDO_OPT}")
+  set(CMAKE_CXX_FLAGS "--gcc-toolchain=${GCC9} ${DEBUG_PREFIX} ${FILE_PREFIX} ${AUTO_FDO_OPT} ${THIN_LTO_OPT} -fcolor-diagnostics ${REORDER_COMP_OPT} -fmax-type-align=8 ${CMAKE_ASAN_FLAG} -std=gnu++11")
+  set(CMAKE_C_FLAGS "--gcc-toolchain=${GCC9} ${DEBUG_PREFIX} ${FILE_PREFIX} ${AUTO_FDO_OPT} ${THIN_LTO_OPT} -fcolor-diagnostics ${REORDER_COMP_OPT} -fmax-type-align=8 ${CMAKE_ASAN_FLAG}")
+  set(CMAKE_CXX_LINK_FLAGS "${LD_OPT} --gcc-toolchain=${GCC9} ${DEBUG_PREFIX} ${FILE_PREFIX} ${AUTO_FDO_OPT}")
   set(CMAKE_SHARED_LINKER_FLAGS "${LD_OPT} -Wl,-z,noexecstack ${THIN_LTO_CONCURRENCY_LINK} ${REORDER_LINK_OPT}")
   set(CMAKE_EXE_LINKER_FLAGS "${LD_OPT} -Wl,-z,noexecstack ${PIE_OPT} ${THIN_LTO_CONCURRENCY_LINK} ${REORDER_LINK_OPT} ${CMAKE_COVERAGE_EXE_LINKER_OPTIONS}")
 else() # not clang, use gcc