[Issue 17778] New: Creating a static array with duplicates in betterC causes "undefined reference to _memset32" linker failure

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17778

          Issue ID: 17778
           Summary: Creating a static array with duplicates in betterC
                    causes "undefined reference to _memset32" linker
                    failure
           Product: D
           Version: D2
          Hardware: x86
                OS: Linux
            Status: NEW
          Severity: minor
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: azi.hassan at live.fr

The following has been tested on Lubuntu 14.04 32 bits with the latest dmd beta
(dmd v2.076.0-b2-dirty).

Attempting to create a static int array (with a known size at compile time)
that has adjacent duplicates in it seems to require an absent _memset32
function.

Here's a stripped down version of the code that causes it :

import core.stdc.stdio;

extern(C) int main()
{
    int[3] array = [12, 12, 11];
    return 0;
}

Here's a second version :

import core.stdc.stdio;

extern(C) int main()
{
    int[3] array;
    array[] = 3;
    return 0;
}

And here's the error :

$ dmd -betterC -g test.d
test.o : Dans la fonction « main » :
/home/hassan/scripts/dailyprogrammer/test.d:5 : référence indéfinie vers «
_memset32 »
collect2: error: ld returned 1 exit status
Error: linker exited with status 1

Arrays of bool or char compile without problem. Arrays of double or long
complain about the absence of _memset64. Note that it only fails when the
duplicates are adjacent. The following code compiles :

import core.stdc.stdio;

extern(C) int main()
{
    char[4] letters = ['a', 'a', 'a', 'a'];
    int[3] numbers = [12, 11, 12]; //non-adjacent duplicates
    bool[6] booleans = [true, true, true, true, true, true];
    long[3] longs = [12, 11, 12];
    int[3] numbers = [0, 0, 0]; //zeros are fine too
    return 0;
}

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