[LLVMbugs] [Bug 2412] New: GCC warning is a clang error

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=2412

           Summary: GCC warning is a clang error
           Product: clang
           Version: unspecified
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Semantic Analyzer
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: isanbard at gmail.com
                CC: llvmbugs at cs.uiuc.edu


For this code:

$ cat t.c
void bar() {
  char ng;

  welcome(ng);
}

void welcome(new_game)
     char new_game;
{
  foo(new_game);
}

clang produces this:

$ clang -emit-llvm-bc -x c -o t.o t.c
t.c:7:6: error: conflicting types for 'welcome'
void welcome(new_game)
     ^
t.c:4:3: error: previous implicit declaration is here
  welcome(ng);
  ^
2 diagnostics generated.

While GCC produces this:

$ gcc -o t t.c -c
t.c:8: warning: conflicting types for ‘welcome’
t.c:4: warning: previous implicit declaration of ‘welcome’ was here


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