trouble compiling 4.1.0p1

[Chris Buxton]

I'm having a devil of a time compiling DHCP 4.1.0p1 on Ubuntu Linux.  
It's a stock install of Ubuntu 9.04 (32-bit). The toolchain is the  
standard for this distro version, based around gcc-4.3.3.

Here's what I'm executing:

     ./configure \
         --prefix=/usr \
         --sysconfdir=/etc \
         --localstatedir=/var \
         --with-srv-lease-file=/var/dhcp4/dhcpd.leases \
         --with-srv6-lease-file=/var/dhcp4/dhcpd6.leases \
         --with-cli-lease-file=/var/dhcp4/dhclient.leases \
         --with-cli6-lease-file=/var/dhcp4/dhclient6.leases
     make

As written there, I get a fatal error from common/parse.c because the  
return value of 'write' is ignored. The output is:

if gcc -DHAVE_CONFIG_H -I. -I. -I../includes  -I.. -DLOCALSTATEDIR='"/ 
var"'   -g -O2  -Wall -Werror -fno-strict-aliasing -MT parse.o -MD -MP  
-MF ".deps/parse.Tpo" -c -o parse.o parse.c; \
         then mv -f ".deps/parse.Tpo" ".deps/parse.Po"; else rm -f  
".deps/parse.Tpo"; exit 1; fi
cc1: warnings being treated as errors
parse.c: In function ‘parse_warn’:
parse.c:5677: error: ignoring return value of ‘write’, declared with  
attribute warn_unused_result
parse.c:5678: error: ignoring return value of ‘write’, declared with  
attribute warn_unused_result
parse.c:5679: error: ignoring return value of ‘write’, declared with  
attribute warn_unused_result
parse.c:5681: error: ignoring return value of ‘write’, declared with  
attribute warn_unused_result
parse.c:5683: error: ignoring return value of ‘write’, declared with  
attribute warn_unused_result
parse.c:5684: error: ignoring return value of ‘write’, declared with  
attribute warn_unused_result
make[2]: Leaving directory `/home/sysadmin/dhcp/dhcp-4.1.0p1/common'
make[1]: Leaving directory `/home/sysadmin/dhcp/dhcp-4.1.0p1/common'
make[2]: *** [parse.o] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all-recursive] Error 1

So I added the following to the beginning:

     sed -i '/STD_CWARNINGS=/s/-Werror//' configure

Now warnings are no longer treated as errors. This gets me to more  
problems. First, those same warnings as before plus some new ones:

if gcc -DHAVE_CONFIG_H -I. -I. -I../includes  -I.. -DLOCALSTATEDIR='"/ 
var"'   -g -O2  -Wall  -fno-strict-aliasing -MT parse.o -MD -MP -MF  
".deps/parse.Tpo" -c -o parse.o parse.c; \
         then mv -f ".deps/parse.Tpo" ".deps/parse.Po"; else rm -f  
".deps/parse.Tpo"; exit 1; fi
parse.c: In function ‘parse_warn’:
parse.c:5677: warning: ignoring return value of ‘write’, declared with  
attribute warn_unused_result
parse.c:5678: warning: ignoring return value of ‘write’, declared with  
attribute warn_unused_result
parse.c:5679: warning: ignoring return value of ‘write’, declared with  
attribute warn_unused_result
parse.c:5681: warning: ignoring return value of ‘write’, declared with  
attribute warn_unused_result
parse.c:5683: warning: ignoring return value of ‘write’, declared with  
attribute warn_unused_result
parse.c:5684: warning: ignoring return value of ‘write’, declared with  
attribute warn_unused_result
if gcc -DHAVE_CONFIG_H -I. -I. -I../includes  -I.. -DLOCALSTATEDIR='"/ 
var"'   -g -O2  -Wall  -fno-strict-aliasing -MT print.o -MD -MP -MF  
".deps/print.Tpo" -c -o print.o print.c; \
         then mv -f ".deps/print.Tpo" ".deps/print.Po"; else rm -f  
".deps/print.Tpo"; exit 1; fi
print.c: In function ‘dump_raw’:
print.c:311: warning: format not a string literal and no format  
arguments
print.c:335: warning: format not a string literal and no format  
arguments

Then the errors:

if gcc -DHAVE_CONFIG_H -I. -I. -I../includes  -I.. -DLOCALSTATEDIR='"/ 
var"'   -g -O2  -Wall  -fno-strict-aliasing -MT socket.o -MD -MP -MF  
".deps/socket.Tpo" -c -o socket.o socket.c; \
         then mv -f ".deps/socket.Tpo" ".deps/socket.Po"; else rm -f  
".deps/socket.Tpo"; exit 1; fi
socket.c: In function ‘send_packet6’:
socket.c:591: error: invalid application of ‘sizeof’ to incomplete  
type ‘struct in6_pktinfo’
socket.c:628: error: dereferencing pointer to incomplete type
socket.c:630: error: dereferencing pointer to incomplete type
socket.c:631: error: dereferencing pointer to incomplete type
socket.c: In function ‘receive_packet6’:
socket.c:692: error: invalid application of ‘sizeof’ to incomplete  
type ‘struct in6_pktinfo’
socket.c:744: error: dereferencing pointer to incomplete type
socket.c:745: error: dereferencing pointer to incomplete type
make[2]: Leaving directory `/home/sysadmin/dhcp/dhcp-4.1.0p1/common'
make[1]: Leaving directory `/home/sysadmin/dhcp/dhcp-4.1.0p1/common'
make[2]: *** [socket.o] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all-recursive] Error 1

Can anyone tell me the correct commands to use to compile this package  
on Ubuntu 9.04?

Chris Buxton
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