RE: 'size_t' undeclared (first use in this function)

[Tom Wang A]

Thanks very much!
In my system, YYSIZE_T is always defined as __SIZE_TYPE__ in the output 
file(y.tab.c .*),  which are compiled by bison 2.1 and bison 2.3. And 
__SIZE_TYPE__ is actually a 8-byte size type on the server. 

And I find another way to resolve my problem: If I remove the line 
#define YYERROR_VERBOSE 0
in the input file (some .yacc file) of bison,  then this line will be also 
removed in the output file,  size_t will be defined  at this time,  so 
YYERROR_VERBOSE  here generates a magic logic for size_t reference. Even I 
define it as 0 in the input file, it will be re-defined automatically as 1, by 
bison . 
Why I add this line in the input file?  I wanted to collect some verbose error 
messages, so defined YYERROR_VERBOSE as 1 at first, and then re-defined it as 
0, thought to disable the function.  Forgive me...

-----Original Message-----
From: Hans Aberg [mailto:address@hidden 
Sent: Thursday, July 23, 2015 5:55 AM
To: Tom Wang A
Cc: address@hidden
Subject: Re: 'size_t' undeclared (first use in this function)


> On 22 Jul 2015, at 11:17, Tom Wang A <address@hidden> wrote:
> 
> I encounter a compiling error with bison 2.1. The output file y.tab.c cannot 
> pass gcc compiling, while there is no such problem on bison 2.3. However, the 
> linux server which installed bison 2.1 cannot be upgraded with bison 2.3 for 
> some reason. So my question is,  how can I avoid such error with bison 2.1? 
> The error is showed as:

Only the last version is supported, and a number of other bugs have been fixed, 
so it is best to find a way to upgrade. Can’t you install it in the user 
account?

> y.tab.c: In function 'yytnamerr':
> y.tab.c:718: error: 'size_t' undeclared (first use in this function)

There is a typo: it should be YYSIZE_T instead of size_t, at least it is what 
Bison 2.3 outputs. And size_t is in <stdio.h>. You might preprocess the file 
and see what YYSIZE_T is defined to.