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4 questions
0
votes
1
answer
4k
views
Undefined reference to `WinMain@16' error when compile with gcc
I'm going to run a simple program constructed with Flex an Bison.
Here are my codes.
Flex file (calc.l)
%{
#include <stdio.h>
#include <stdlib.h>
#include "tt.tab.h"
%}
/* %option ...
- 412
13
votes
1
answer
19k
views
Meaning of yywrap() in flex
What does this instructions mean in flex (lex) :
#define yywrap() 1
and this [ \t]+$
i find it in the code below:
(%%
[ \t]+ putchar('_');
[ \t]+%
%%
input "hello world"
output "hello_world"
)
- 347
15
votes
2
answers
7k
views
#error "Must #define __STDC_LIMIT_MACROS before #including Support/DataTypes.h"
I have been trying to follow the tutorial at http://gnuu.org/2009/09/18/writing-your-own-toy-compiler/5/ (using flex, bison and llvm) but when typing the line
g++ -o parser parser.cpp tokens.cpp ...
user1361491
10
votes
3
answers
13k
views
yylval undefined with flex and bison
I have searched almost every material online. But I am still confused why lexer cannot identify yylval.
Here is the case:
I have defined a bunch of ADT in node.h and realize them in node.c, my ...
- 9,906