Package: flex
Version: 2.6.0
I downloaded, compiled and installed the latest flex, from source. No
problems showed.
To start using it, I have the file fb1-1.l:
=======
/* wc */
%{
int chars = 0;
int words = 0;
int lines = 0;
%}
%%
[a-zA-Z]+ { words++; chars += strlen(yytext); }
\n { chars++; lines++; }
. { chars++; }
%%
main()
{
yylex();
printf("lines words chars\n");
printf("%8d %8d %8d\n", lines, words, chars);
}
=======
I compile it, but it gives a few warnings in the generated lex.yy.c file.
The output from the terminal, including the commands I have used, is:
==========
$ flex fb1-1.l
$ gcc -Wall lex.yy.c
fb1-1.l:xx: warning: control reaches end of non-void function
/tmp/ccydizSI.o: In function `yylex':
/.../lex.yy.c:846: undefined reference to `yywrap'
/tmp/ccydizSI.o: In function `input':
/.../lex.yy.c:1186: undefined reference to `yywrap'
collect2: ld returned 1 exit status
==========
Shouldn't this work?
