Hi,

My system is a macbook pro (intel duo core) with standard install of OS X.  GCC version 4.01 Build 5250.

I am writing a flex program and ran across a very strange issue.  When building and running the following flex (lex) program, the global variable access does not work properly.  The expected output from this program (when the a character is found) is :

glo = 5
5 = ret, glo = 5

but when building/running this program using GCC 4.01 , I get this output:

glo = 5
5 = ret, glo = 0

It works well with GCC v3.x

Here is the simple lex program:

%{
#include <stdio.h>

#define yywrap() 1

int glo;
%}

%%
"a"    { glo = 5;
         printf("glo = %d\n", glo);
         return (int)5;
       }
%%

main ()
{
    printf("%d = ret, glo = %d", yylex(), glo);
}

To build this, I am running:
flex test.l
gcc lex.yy.c

to run,
a.out

Then press the a key and enter.