https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=7829
--- Comment #1 from Guy Harris <[email protected]> 2012-10-09 18:29:21 PDT --- (In reply to comment #0) > Build Information: > /me just wonders, why libpcap hasn't version string in the "Compiled" section: Because libpcap doesn't supply a string that is guaranteed to be the version of libpcap on the system at compile time. version[] might be it on *some* platforms, but, on others, it's the version of libpcap with which you're running. To quote the comment on the checkin wherein I removed the version info for libpcap from the "Compiled" message: ------------------------------------------------------------------------ r40138 | guy | 2011-12-09 13:15:48 -0800 (Fri, 09 Dec 2011) | 7 lines Referring to pcap_version[] doesn't do what you want on at least some UN*Xes (Fedora 16 and probably other Linux distributions, probably at least some if not all other ELF-based systems, and perhaps also Mac OS X), and causes problems if pcap_version[] has a different length in the libpcap with which the executable was built and the libpcap with which it's run, so we avoid using it for now. I might, just for fun, look at trying to have the libpcap configure script generate pcap.h from pcap.h.in and stuff the contents of libpcap's VERSION file into a #define; if I do that, then, at least when configured and built with whatever released version has that or any later version, Wireshark can supply a compile-time version of libpcap. > BTW why is libz necessary during compile time ? So that we can use it at run time? In order to use it, we need the header for it, as well as the .so/.dylib/.whatever file or .a file on UN*X, and the .lib file and maybe .dll file on Windows. The header file provides a version string, so we know what version the configure script found, and thus what libz capabilities it configured in. The run-time string indicates what version it's running with; if it's dynamically linked, and you're running on an OS that is not actively hostile towards running binaries built with older versions of the OS on newer versions of the OS :-), the "compiled with" and "running with" versions could be different. -- Configure bugmail: https://bugs.wireshark.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching all bug changes. ___________________________________________________________________________ Sent via: Wireshark-bugs mailing list <[email protected]> Archives: http://www.wireshark.org/lists/wireshark-bugs Unsubscribe: https://wireshark.org/mailman/options/wireshark-bugs mailto:[email protected]?subject=unsubscribe
