[Issue 7063] New: No error or warning for conflicting D and C symbols

d-bugmail at puremagic.com d-bugmail at puremagic.com
Sat Dec 3 15:27:22 PST 2011


http://d.puremagic.com/issues/show_bug.cgi?id=7063

           Summary: No error or warning for conflicting D and C symbols
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Mac OS X
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: peter.alexander.au at gmail.com


--- Comment #0 from Peter Alexander <peter.alexander.au at gmail.com> 2011-12-03 15:27:20 PST ---
If you have a D symbol that mangles to the same name as a C symbol you receive
no warnings or errors and your program silently exhibits incorrect behaviour:

import std.stdio;

extern(C) void D4test3fooFZv() { writeln(1); }
void foo() { writeln(2); }

void main()
{
    D4test3fooFZv();
    foo();
}

For me, this outputs:

1
1

DMD should probably give an error or at least a warning when two symbols
conflict like this.

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