Locale breaks scanf()

[Andreas Tille <tille@physik.uni-halle.de>]

Hello,

I've detected a strange bug when using setlocale().  The conversion
from strings to double for instance using scanf() is broken.

I have installed libc6 Version 2.0.7.19981211-6.  This problem doesn't
occure at home on my clean slink system.  Here is a very small
code example:

#include <locale.h>
#include <stdio.h>

void main(void)
{
  int    i;
  double d;
  char   *string = "0.5";

  setlocale (LC_ALL, "");
    
  i = sscanf(string, "%lg", &d);
  printf("%s is converted to %g (%i input items assigned)\n", string, d, i);
}

I compiled it with

# Makefile for scantest.c
NAME=scantest

CFLAGS=-g -O2 -Wall
LDFLAGS=-s

$(NAME): $(NAME).o
$(NAME).o: $(NAME).c

clean:
	rm -rf *.o *~

On my system I get the output:

 > scantest
0.5 is converted to 0 (1 input items assigned)

Could somebody explain this?

Kind regards

        Andreas.

PS: I'm away until next Tuesday, if there are further questions to that
    problem.