[scudo] Do not compile timing.cpp if LLVM_LIBC_INCLUDE_SCUDO=on

[alfredfo]

Summary

Temporary hack until LLVM libc supports inttypes.h print format macros

timing.h uses the PRId64 macro which is not included in llvm libc yet

Bug: https://github.com/llvm/llvm-project/issues/63317

[Chia-hungDuan]

Sorry, I forgot one thing, you may also want to exclude the unit test lib/scudo/standalone/tests/timing_test.cpp as well

[alfredfo]

Skip timing_test.cpp if LLVM_LIBC_INCLUDE_SCUDO=on too

[michaelrj]

LGTM, thank you for doing this!

compiler-rt/lib/scudo/standalone/CMakeLists.txt

set(SCUDO_SOURCES
   mem_map.cpp
   release.cpp
   report.cpp
   rss_limit_checker.cpp
   string_utils.cpp
   timing.cpp
   )
 
+# Temporary hack until LLVM libc supports inttypes.h print format macros
+# See: https://github.com/llvm/llvm-project/issues/63317#issuecomment-1591906241
+if(LLVM_LIBC_INCLUDE_SCUDO)
+  list(REMOVE_ITEM SCUDO_HEADERS timing.h)
+  list(REMOVE_ITEM SCUDO_SOURCES timing.cpp)
+endif()
+
 # Enable the necessary instruction set for scudo_crc32.cpp, if available.
 # Newer compiler versions use -mcrc32 rather than -msse4.2.
 if (COMPILER_RT_HAS_MCRC32_FLAG)
   set_source_files_properties(crc32_hw.cpp PROPERTIES COMPILE_FLAGS -mcrc32)
 elseif (COMPILER_RT_HAS_MSSE4_2_FLAG)
   set_source_files_properties(crc32_hw.cpp PROPERTIES COMPILE_FLAGS -msse4.2)
 endif()