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Re: ctype.h:192: error: parse error before '{' token


From: Jeffrey Walton
Subject: Re: ctype.h:192: error: parse error before '{' token
Date: Wed, 17 Jul 2019 21:59:54 -0400

On Wed, Jul 17, 2019 at 9:41 PM Jeffrey Walton <address@hidden> wrote:
>
> On Wed, Jul 17, 2019 at 9:19 PM Paul Eggert <address@hidden> wrote:
> >
> > Jeffrey Walton wrote:
> > > It looks like the glibc macro is a little simpler and lacks the 
> > > attributes:
> >
> > Thanks. Can you give the preprocessor output for a declaration that fails 
> > with
> > Gnulib?
>
> __attribute__ ((nothrow)) seems to be causing the problems.
>
> First, cd into the problem directory, then -E regex.c using same 
> options/flags:
>
> $ cd gettext-0.20.1/gettext-tools/libgrep
> $ gcc -std=gnu99 -DHAVE_CONFIG_H -I. -I..  -I.. -I../gnulib-lib
> -I../gnulib-lib -I../intl -DIN_GETTEXT_TOOLS_LIBGREP=1
> -I/usr/local/include -DNDEBUG  -g2 -O2 -fPIC -pthread -E regex.c >
> regex.ii.txt
>
> Second, grep on the throw:
>
> $ grep -B 2 -A 2 throw regex.ii.txt > regex-grep.txt
> $ cat regex-grep.txt
> extern int isalnum (int) __attribute__ ((__nothrow__ ));
> extern int isalpha (int) __attribute__ ((__nothrow__ ));
> extern int iscntrl (int) __attribute__ ((__nothrow__ ));
> extern int isdigit (int) __attribute__ ((__nothrow__ ));
> extern int islower (int) __attribute__ ((__nothrow__ ));
> ...
>

This is interesting. The GCC man pages for 3.3.1 (and onwards) says
nothrow is a supported attribute:
https://gcc.gnu.org/onlinedocs/gcc-3.3.1/gcc/Function-Attributes.html

It looks like a copy/paste error.

Jeff



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