[LLVMbugs] [Bug 12920] New: clang on mingw gives gcc-incompatible parameters to gcc as and linker driver

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=12920

             Bug #: 12920
           Summary: clang on mingw gives gcc-incompatible parameters to
                    gcc as and linker driver
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: bearophile at mailas.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Clang 3.1, Windows Vista, a problem in the MinGW-Clang, merged inside
MinGW4.7.0.

Discussed with "chapuni" on IRC, he says: "clang on mingw (probably cygwin)
tends to pass gcc-incompatible parameters to gcc as and linker driver".

I am not using cygwin.

clang --version gives:

clang version 3.1 (branches/release_31)
Target: i686-pc-mingw32
Thread model: posix


The problem:

clang -Wstrncat-size foo.c -o foo
And:
clang -c -Wstrncat-size foo.c -o foo

Give to me:

gcc.exe: error: unrecognized command line option '-Wstrncat-size'
clang: error: assembler (via gcc) command failed with exit code 1 (use -v to
see invocation)

This is why I have not tried -unroll-runtime for Bug 5540

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