[LLVMbugs] [Bug 15150] New: Can not use C99 function names as variable names in C89

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=15150

             Bug #: 15150
           Summary: Can not use C99 function names as variable names in
                    C89
           Product: clang
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: ss23 at ss23.geek.nz
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


The following code doesn't compile in clang, but does in gcc:

int logf = 5;
int main() {
        return logf;
}

# gcc test.c -o test -std=c89
# ./test; echo $?
5
# clang test.c -o test -std=c89
test.c:1:5: error: redefinition of 'logf' as different kind of symbol
int logf = 5;
    ^
test.c:1:5: note: previous definition is here
test.c:4:16: warning: incompatible pointer to integer conversion returning
'float (float)' from a function with result type 'int' [-Wint-conversion]
        return logf;
               ^~~~
1 warning and 1 error generated.

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