Re: Can't build Nmap --with-libpcap=path/to/libpcap

[olli hauer <ohauer () gmx de>]

On 2013-12-11 18:37, Daniel Miller wrote:
> Hi List,
>
> So I was trying to clean up Nsock a bit, since it unconditionally uses the pcap.h that ships with Nmap, even when a 
> system-installed libpcap-dev package is available. But that's a separate issue, since I can't fix it without changing 
> compatibility, as follows:
>
> Download and build libpcap. Call the directory $MY_PCAP.
>
> Configure Nmap: ./configure --with-libpcap=$MY_PCAP
>
> Watch in consternation as these messages fly past:
> checking pcap.h usability... no
> checking pcap.h presence... no
> checking for pcap.h... no
>
> The problem is that Nmap's configure script checks for $MY_PCAP/include/pcap.h, when the file is really in 
> $MY_PCAP/pcap.h. The same problem would surface when linking, since the LDFLAGS are set to -L$MY_PCAP/lib, and the 
> libraries are also in the top-level directory. This is true of the latest libpcap (1.5.2), the one that ships with 
> Nmap (1.2.1), and the source package for the one in Ubuntu 12.04 (1.1.1).
>
> The fix, as I see it, is to alter configure.ac to remove the include/ and lib/ subdirectories for libpcap. I want to 
> know how this may affect others before I commit it, though, in case somebody's libpcap is structured differently. An 
> alternative would be to have separate configure options for the include and lib directories.

Hi Dan,

I've just done a simple ./configure with libpcap-1.5.2 and in the generated Makefile the following line can be found.

...
# Pathname of directory to install the include files
includedir = ${prefix}/include
...
install: install-shared install-archive pcap-config
        [ -d $(DESTDIR)$(libdir) ] || \
            (mkdir -p $(DESTDIR)$(libdir); chmod 755 $(DESTDIR)$(libdir))
        [ -d $(DESTDIR)$(includedir) ] || \
            (mkdir -p $(DESTDIR)$(includedir); chmod 755 $(DESTDIR)$(includedir))
        [ -d $(DESTDIR)$(includedir)/pcap ] || \
            (mkdir -p $(DESTDIR)$(includedir)/pcap; chmod 755 $(DESTDIR)$(includedir)/pcap)

Can you check your parameters for libpcap, specially the generated Makefile.

-- 
olli
_______________________________________________
Sent through the dev mailing list
http://nmap.org/mailman/listinfo/dev
Archived at http://seclists.org/nmap-dev/