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Re: [RFC] Unexpected compiler twist of the wcscoll issue
- From: Franz Sirl <Franz dot Sirl-kernel at lauterbach dot com>
- To: Paolo Carlini <pcarlini at unitus dot it>
- Cc: gcc at gcc dot gnu dot org,gcc-bugs at gcc dot gnu dot org,libstdc++ at gcc dot gnu dot org,bkoz at redhat dot com,drepper at redhat dot com
- Date: Tue, 12 Mar 2002 15:18:08 +0100
- Subject: Re: [RFC] Unexpected compiler twist of the wcscoll issue
At 13:49 12.03.2002, Paolo Carlini wrote:
>Hi,
>
>as probably many of you already know, we are experiencing some problems making
>use of glibc2.2's wcscoll in implementing v3 collate::compare.
>
>Very unexpectedly, on my system (i686-pc-linux-gnu, glibc2.2.5) at least, this
>turns out to have to do with the compiler!
>
>Consider this simple testcase, provided by Peter (Schmid).
>
>#include <wchar.h>
>#include <locale.h>
>#include <stdio.h>
>
>int main()
>{
> int i;
> setlocale(LC_ALL, "de_DE");
> i = wcscoll (L"Äuglein", L"Augment");
> printf("result of the wide string comparison: %i\n", i);
> i = strcoll ("Äuglein", "Augment");
> printf("result of the string comparison: %i\n", i);
> return 0;
>}
>
>This is what I get:
>
>3.0.4, 3.1 pre, 3.2 exp:
>------------------------
>result of the wide string comparison: 20
>result of the string comparison: -1
>
>2.95.3 + patches, 2.96 RH, Intel 5.0.1 :
>----------------------------------------
>result of the wide string comparison: -1
>result of the string comparison: -1
>
>Is anyone able to reproduce/explain this, on different architectures perhaps?
No problems on powerpc-linux-gnu, glibc-2.2.5 (glibc-2-2-branch as of Feb
22) and gcc-2.95.4, gcc-3.1, gcc-3.2, so it seems the bug is platform specific?
Franz.