[llvm-dev] [sanitizer] When do we expect PIC macro to be defined?

Taewook Oh via llvm-dev llvm-dev at lists.llvm.org
Thu Jun 14 00:41:27 PDT 2018


I have a problem with tsan library contains .preinit_array section even with PIC build, and found that SANITIZER_CAN_USE_PREINIT_ARRAY macro is guarded by PIC macro (https://github.com/llvm-mirror/compiler-rt/blob/master/lib/sanitizer_common/sanitizer_internal_defs.h#L100). I assumed that PIC macro to be defined if COMPILER_RT_HAS_FPIC_FLAG is set, but it seems that PIC macro is never defined unless it is explicitly given by the build command line – I couldn’t find any place that defines the macro from cmake files. Is that expected, or something is missed here? Thanks!

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