[llvm-bugs] [Bug 33201] New: Apple Clang bundled with Xcode 8 does not reject -fsanitize=undefined when it should
llvm-bugs at lists.llvm.org
Sun May 28 15:13:28 PDT 2017
Bug ID: 33201
Summary: Apple Clang bundled with Xcode 8 does not reject
-fsanitize=undefined when it should
OS: MacOS X
Assignee: unassignedclangbugs at nondot.org
Reporter: noloader at gmail.com
CC: llvm-bugs at lists.llvm.org
We are testing with the Undefined Behavior sanitizer on Travis CI. Travis
provides OS X with Xcode 8.2.
Our build results in (https://travis-ci.org/noloader/cryptopp/jobs/236976227):
ld: file not found:
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [cryptest.exe] Error 1
If Clang cannot compile/link a program with Undefined Behavior sanitizer, then
it should reject -fsanitize=undefined and fail the compile.
We cannot use -fsanitize=address,undefined because Address Santizier has some
bugs, and it produces incorrect results with GCC inline assembly when ebp/rbp
is used as a general purpose register. Effectively we had to suspend Asan
testing and only use Valgrind.
My apologies for filing an Apple Clang bug in the LLVM bug tracker. We don't
have an iTunes account, so this is the only way we know to bring it to the
Apple developers attention.
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