On Mon, Oct 01, 2018 at 06:16:46AM +0200, Thomas Trepl via blfs-dev wrote:
> Am Sonntag, den 30.09.2018, 23:06 -0400 schrieb Clayton Johnson via blfs-dev:
> > DHCP 4.4.1 broken in guide as of GCC 8 update.
> >
> > Attached patch will fix this issue.
>
> What do you mean by "broken"? What is the issue which gets fixed by that
> patch?
>
> dhcp compiles fine here with gcc-8.2.0.
>
Very odd. I built it (in chroot), and installed the client, last
week on a build from svn with no problem.
But after seeing Clayton's response I tried it on 8.3 and sure
enough it failed because of -Werror:
gcc -DHAVE_CONFIG_H -I. -I../includes -I.. -DLOCALSTATEDIR='"/var"' -g -O2
-Wall -Werror -fno-strict-aliasing -I../includes -I/tmp/dhcp-4.4.1/bind/include
-MT discover.o -MD -MP -MF .deps/discover.Tpo -c -o discover.o discover.c
discover.c: In function ‘discover_interfaces’:
discover.c:646:4: error: ‘strncpy’ output may be truncated copying 15 bytes
from a string of length 15 [-Werror=stringop-truncation]
strncpy(tmp->name, info.name, sizeof(tmp->name) - 1);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[2]: *** [Makefile:500: discover.o] Error 1
Even more odd, I had done the same thing on this machine when
building/testing 8.3 and the log for that only shows:
gcc -DHAVE_CONFIG_H -I. -I../includes -I.. -DLOCALSTATEDIR='"/var"' -O2
-march=native -D_PATH_DHCLIENT_SCRIPT='"/sbin/dhclient-script"'
-D_PATH_DHCPD_CONF='"/etc/dhcp/dhcpd.conf"'
-D_PATH_DHCLIENT_CONF='"/etc/dhcp/dhclient.conf"' -I../includes
-I/building/dhcp-4.4.1/bind/include -MT discover.o -MD -MP -MF
.deps/discover.Tpo -c -o discover.o discover.c
mv -f .deps/discover.Tpo .deps/discover.Po
Retrying with my own CFLAGS (-O2 -march=native) at the start
of the CFLAGS works fine. Ah ha! When I build normally, I use
CFLAG="$CFLAGS -D_PATH...
and that is causing -Wall -Werror -fno-strict-aliasing to be
omitted, but what is in the book merely adds defines to those existing
CFLAGS.
ĸen
--
Well grubbed , old mole!
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