weird error messages from __COPYRIGHT macro
Here is a source file which looks fine to me, but for which I get
unexpected assembler warnings:
#include sys/cdefs.h
__COPYRIGHT("@(#) Copyright (c) 1983, 1988, 1993\n"
"The Regents of the University of California."
" All rights reserved.\n");
int
main(void)
{
exit(0);
}
The compiler warnings follow:
/tmp/ccZ16701.s: Assembler messages:
/tmp/ccZ16701.s:5: Warning: Unterminated string: Newline inserted.
/tmp/ccZ16701.s:6: Warning: Unterminated string: Newline inserted.
I'm led to believe that these error messages are not present on a NetBSD
box. So is this broken usage of __COPYRIGHT(), or is this pre-processor
or assembler breakage?
And please don't whine about me about string concatenation -- it's legal
in ANSI C. :-)
Thanks,
Sheldon.
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Re: weird error messages from __COPYRIGHT macro
On Wed, 16 Aug 2000 22:09:02 +0200, Mark Murray wrote: Maybe I am. Did your _exact_ sample program fail on NetBSD in the same way that it failed on FreeBSD? No. A sufficiently similar program also fails on FreeBSD but does not fail on NetBSD. :-) Ciao, Sheldon. To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Re: weird error messages from __COPYRIGHT macro
On Wed, 16 Aug 2000 21:58:11 +0200, Mark Murray wrote: Bah. Only three things use __COPYRIGHT; ftp(d?), routed and make. None of them use \n's like you do. I'm not trying to protect the way I do it, since I don't use the macro myself. I just want to make sure that, if the NetBSD behaviour (handling embedded newlines properly) is correct, that we provide a compatible interface. Am I missing something here? Ciao, Sheldon. To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Re: weird error messages from __COPYRIGHT macro
On Wed, 16 Aug 2000 21:25:14 +0200, Mark Murray wrote: ...and it does not like the multi-line string. You may need to double-escape the \n's (like \\n) to get them into the .ident line symbolically. (I just checked - it worked!) Now we just need someone with a NetBSD box handy to let us know whether double-escaping the newlines works alright there. I have a feeling it won't, which probably means we need to see if we can fix our implementation of __IDSTRING(). I've sent private mail to Peter, who introduced this implementation of __IDSTRING in rev 1.26 of cdefs.h. Ciao, Sheldon. To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Re: weird error messages from __COPYRIGHT macro
I'm not trying to protect the way I do it, since I don't use the macro myself. I just want to make sure that, if the NetBSD behaviour (handling embedded newlines properly) is correct, that we provide a compatible interface. Am I missing something here? Maybe I am. Did your _exact_ sample program fail on NetBSD in the same way that it failed on FreeBSD? M -- Mark Murray Join the anti-SPAM movement: http://www.cauce.org To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Re: weird error messages from __COPYRIGHT macro
(I just checked - it worked!) Now we just need someone with a NetBSD box handy to let us know whether double-escaping the newlines works alright there. I have a feeling it won't, which probably means we need to see if we can fix our implementation of __IDSTRING(). Bah. Only three things use __COPYRIGHT; ftp(d?), routed and make. None of them use \n's like you do. I've sent private mail to Peter, who introduced this implementation of __IDSTRING in rev 1.26 of cdefs.h. Compatibility measure? M -- Mark Murray Join the anti-SPAM movement: http://www.cauce.org To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Re: weird error messages from __COPYRIGHT macro
And please don't whine about me about string concatenation -- it's legal
in ANSI C. :-)
__COPYRIGHT is defined as
#define __COPYRIGHT(s) __IDSTRING(copyright,s)
and __IDSTRING is
#define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"")
By the time the string makes it to the assembler, the \n's have been
turned into (real) NL's so the assembler line looks like
.ident "@(#) Copyright (c) 1983, 1988, 1993
The Regents of the University of California. All rights reserved.
"
...and it does not like the multi-line string. You may need to
double-escape the \n's (like \\n) to get them into the .ident
line symbolically.
(I just checked - it worked!)
M
--
Mark Murray
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