PaulHowarth/Blog/2011-01-31

Monday 31st January 2011

Fedora Project

  • Became owner of the EPEL-4 branch of perl-Sub-Exporter and merged it with the EPEL-5 branch; the build will have to wait a couple of weeks until perl-Package-Generator and perl-Data-OptList are oushed to EPEL-4 stable

Local Packages

  • Updated nmap to 5.50

  • The updated version includes a new utility nping, though it's only available on distributions with openssl 0.9.8 or later (Fedora 5 onwards) as it needs the EVP_sha256 function

  • I also came across a problem when compiling nmap for ancient distributions (pre Fedora 2) with libpcap 0.7.2 or earlier, despite configuring builds on those releases to use the bundled libpcap: 

  • $  ./configure \
    --with-liblua=included \
    --with-libpcap=included \
    --without-nping
...
gcc -c -I/usr/kerberos/include   -I../../nbase -DHAVE_CONFIG_H -DNSOCK_VERSION=\"0.02\" -D_FORTIFY_SOURCE=2 -I../include -I../../libpcap -O2 -g -pipe -march=i386 -mcpu=i686 -Wall   nsock_pcap.c -o nsock_pcap.o
In file included from ../../libpcap/pcap.h:45,
                 from nsock_pcap.h:7,
                 from nsock_pcap.c:12:
../../libpcap/pcap/pcap.h:352: error: conflicting types for `bpf_filter'
/usr/include/net/bpf.h:448: error: previous declaration of `bpf_filter'
../../libpcap/pcap/pcap.h:353: error: conflicting types for `bpf_validate'
/usr/include/net/bpf.h:447: error: previous declaration of `bpf_validate'

  • What's happening here is that nsock's configure script is checking for <net/bpf.h> and finding it on the system, despite the fact that we're using the bundled libpcap, which doesn't supply that obsolete header file. So the old system libpcap header files are included in addition to the much newer bundled libpcap header files and we get the conflict above. A simple workaround was to tell the configure script that we don't have <net/bpf.h>: 

  • $ export ac_cv_header_net_bpf_h=no
$ ./configure ...

  • I reported the issue upstream in the hope that maybe the configure script could be tweaked not to check for this header if the included libpcap is being used in future versions.

  • Updated perl-Parse-CPAN-Meta to add explicit runtime dependencies on perl(CPAN::Meta::YAML) ≥ 0.002 and perl(JSON::PP) ≥ 2.27103 as the module loads these dynamically as needed and thus they aren't found by the automatic dependency generator

  • Updated perl-YAML-Tiny to 1.47:

    • No functional changes
    • Only depend on the YAML implementations when we are release testing

Recent