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* renamed --with-llvm-sanitizer to --with-sanitizer
* disable all optimisations (-O0) if --with-sanitizer set,
no functions/paramaters/variables will be optimised, improves debugging
* enable undefined behaviour sanitizer (ubsan)
* enable leak sanitizer (lsan)
* check if -fsanitize=fuzzer is available and --enable-fuzztargets set,
fail if not (only supported by clang)
* include level 3 debugging information (-g3), improves macro debugging
* disabled ubsan misaligned pointer access and lshift overflow
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
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