Sender:	michon AT email DOT enst DOT fr
To:	pgcc AT delorie DOT com
Subject:	trouble compiling dhcpcd-1.3.7
MIME-Version:	1.0
From:	Emmanuel Michon <emmanuel DOT michon AT polytechnique DOT org>
Date:	08 Jun 1999 12:16:41 +0200
Message-ID:	<j2ln1ybngja.fsf@rocher.enst.fr>
Lines:	64
User-Agent:	Gnus/5.07008 (Pterodactyl Gnus v0.80) Emacs/20.3
Reply-To:	pgcc AT delorie DOT com

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Hi,

pgcc-1.1.3-3mdk, the defaut C compiler of the Mandrake 6.0 (Venus)
Linux distribution (with 2.2.5 kernel), is not able to compile dhcpcd-1.3.7,
certainly because of a bug in preprocessor optimization.

gcc -fomit-frame-pointer -malign-loops=2 -malign-jumps=2 -malign-functions=2 -Wall  -I. -c client.c
client.c: In function `parseDhcpMsgRecv':
client.c:88: warning: suggest explicit braces to avoid ambiguous `else'

produces a client.o

and

gcc -O2 -fomit-frame-pointer -malign-loops=2 -malign-jumps=2 -malign-functions=2 -Wall  -I. -c client.c
client.c: In function `parseDhcpMsgRecv':
client.c:88: warning: suggest explicit braces to avoid ambiguous `else'
client.c:280: invalid operands to binary &
client.c:280: invalid operands to binary &
client.c:280: invalid operands to binary &
client.c:280: invalid operands to binary &
client.c:288: invalid operands to binary &
client.c:288: invalid operands to binary &
client.c:288: invalid operands to binary &
client.c:288: invalid operands to binary &

now, let's gcc -E -O2 client.c >client.c-expanded, the trouble is here:

line 280 of client.c

*(unsigned int *)DhcpOptions.val[dhcpT1value] = htonl(0.5*ntohl(*(unsigned int *)DhcpOptions.val[dhcpIPaddrLeaseTime]));

is expanded into:


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Content-Type: application/octet-stream;
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Content-Disposition: attachment;
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Content-Description: the line 280 expanded by gcc -E -O2
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au9BdvIJcx3tomcQAAA=

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hope you get something useful out of this...

-- 
Emmanuel Michon (http://www.stud.enst.fr/~michon)


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