[ILUG] gcc & wcscasecmp() strangeness . . . .

[John_White at dell.com]

Mornin all . . . . gcc seems to treat wcscasecmp() differently if it is
behaving as a C++ compiler rather than a C compiler. With the below inside a
string.c and inside a string.cpp I get . . .

/* begin */
#include <wchar.h>
#include <stdio.h>

int main()
{
 wchar_t String1[] = L"New";
 wchar_t String2[] = L"new";

 printf("%S == %S ? %d\n", String1, String2, (0 == wcscasecmp(String1,
String2)));

 return(0);
}
/* end */

[~/test $]cc -o string1 string.c
[~/test $]cc -o string2 string.cpp
cstring.cpp: In function `int main()':
cstring.cpp:10: warning: implicit declaration of function `int
wcscasecmp(...)'
[~/test $]

extern "C" { ... } in the appropriate place doesn't seem to help . . .
Other wide char functions are fine . . . . 
Both resulting binaries seem to work fine . . . . 
This is using a very old compiler ( egcs-2.91.66 - RH6.0 ) but I don't 
have a more recent one to hand . . . do others see the same thing ?

Any help very much appreciated.
John.