[Jeff Morriss <jeff.morriss.ws@xxxxxxxxx>]

Hi folks,

I found out recently that Wireshark needs the Z_BLOCK macro which is 
only in zlib 1.2.0.5 and later.  Rather than checking explicitly for the 
version (which seemed like it would be a pain) I thought I'd check for 
the macro.

A quick search for AC_CHECK_DEFINE found me something in the Autoconf 
Archive[1] but (just before I checked it in, I discovered that) the 
current version[2] is GPLv3.

[1] https://www.gnu.org/software/autoconf-archive/
[2] 
http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_check_define.m4

I've never done much with license compatibilities, so I have to ask: can 
I add this macro to Wireshark's aclocal-fallback?  Or do I have to find 
another solution?

Thanks,
-Jeff