[compiler-rt] [compiler-rt] [CMake] Add option to disable sanitizer-common builds by default (PR #160962)

[Dan Blackwell via llvm-commits]

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@@ -8,7 +8,7 @@ include(SanitizerUtils)
 # sanitizers or xray (or both).
 #
 #TODO: Refactor sanitizer_common into smaller pieces (e.g. flag parsing, utils).
-if (COMPILER_RT_HAS_SANITIZER_COMMON AND
+if (COMPILER_RT_HAS_SANITIZER_COMMON AND COMPILER_RT_BUILD_SANITIZER_COMMON AND
     (COMPILER_RT_BUILD_SANITIZERS OR COMPILER_RT_BUILD_XRAY OR COMPILER_RT_BUILD_MEMPROF OR COMPILER_RT_BUILD_CTX_PROFILE))
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DanBlackwell wrote:

I presume that these options depend on having sanitizer_common built; should we instead be adding the new option to the 'OR'? i.e. is there a use case for building sanitizers/xray/memprof without sanitizer_common?

https://github.com/llvm/llvm-project/pull/160962