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Re: GCC 4.9.1 suggests -std=c99

From: Paul Eggert
Subject: Re: GCC 4.9.1 suggests -std=c99
Date: Tue, 09 Sep 2014 07:58:54 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.0

Dmitry Antipov wrote:
With GCC 4.9.1 and '--enable-checking --enable-check-lisp-object-type

../../trunk/src/sysdep.c: In function 'str_collate':
../../trunk/src/sysdep.c:3751:2: error: 'for' loop initial declarations
are only allowed in C99 or C11 mode

I don't observe this problem when I build with GCC 4.9.1. src/Makefile says "CC = gcc -std=gnu99", so it works. Perhaps you overrode CC? Or maybe you have an old version of autoconf?

While we're on the topic, --enable-gcc-warnings generates false alarms when combined with arbitrary other options like --enable-check-lisp-object-type, CFLAGS='-g3 -O0', etc. I do not take the trouble to pacify GCC for all combinations of build options, just for the default ones.

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