Bug#876123: libpcap0.8-dev: `pcap-config --libs` output starting with a space may cause FTBFS

[Lukas Schwaighofer]

Package: libpcap0.8-dev
Version: 1.8.1-4
Severity: important
X-Debbugs-CC: pkg-security-team at lists.alioth.debian.org


Dear libpcap maintainer,

the fix for Bug#760370 [1] has caused the output of
    pcap-config --libs
to start with a space.  This appears to be a problem for applications
using the output of that directly with cmake.  At least for
openvas-libraries (manged by the pkg-security-team I've put in CC), the
change results in a FTBFS [2] with cmake reporting:

  Target "openvas_misc_shared" links to item " -lpcap" which has
  leading or trailing whitespace.  This is now an error according to
  policy CMP0004.

While we can fix this for the openvas-libraries package, this may
affect other projects using libpcap and cmake as well.

Thanks
Lukas

[1] https://bugs.debian.org/760370
[2] https://bugs.debian.org/876093