Subject: Re: build error in icmp6.c
To: Hans-Christian Becker <hcb@phc.chalmers.se>
From: None <itojun@iijlab.net>
List: current-users
Date: 06/13/2000 23:42:05
>Sources updated this morning; macppc:
>cc  -O2 -pipe -Werror -Wreturn-type -Wpointer-arith 
>-Wno-uninitialized -Wno-main -msoft-float -I. -I../../../../arch 
>-I../../../.. -nostdinc -I../../../../../crypto-intl/sys 
>-I../../../../../gnu/sys -DLKM -DDIAGNOSTIC -DTRAP_PANICWAIT 
>-DNMBCLUSTERS="0x400" -DMAXUSERS=64 -D_KERNEL -Dmacppc  -c 
>../../../../netinet6/icmp6.c
>cc1: warnings being treated as errors
>../../../../netinet6/icmp6.c: In function `ni6_dnsmatch':
>../../../../netinet6/icmp6.c:1419: warning: comparison is always 0 
>due to limited range of data type
>../../../../netinet6/icmp6.c:1419: warning: comparison is always 0 
>due to limited range of data type
>*** Error code 1

	how can I suppress the warning in this case?  it looks that macppc
	treats char as unsigned char, while for i386 char is signed.
	if the char is signed, I really need to check for negative numbers. 

itojun


---
static int
ni6_dnsmatch(a, alen, b, blen)
	const char *a;
	int alen;
	const char *b;
	int blen;
{
	/* ... */

	if (a[0] < 0 || b[0] < 0)	<---	line 1419 in the above
		return 0;

	/* ... */
}