[LLVMbugs] [Bug 6515] New: gcc compat: __builtin_signbit doesn't appear to be supported

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=6515

           Summary: gcc compat: __builtin_signbit doesn't appear to be
                    supported
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: -New Bugs
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: srp at srparish.net
                CC: llvmbugs at cs.uiuc.edu


I'm getting the following when trying to build a code base that is typically
built with gcc -std=gnu99:

  error: implicit declaration of function '__builtin_signbit' is invalid in C99

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