Re: including GPLv3 autoconf macro in Wireshark

[Guy Harris <guy () alum mit edu>]

On May 18, 2012, at 11:55 AM, Jeff Morriss wrote:

> 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.

You could use AC_TRY_COMPILE() with a test program such as

        #ifndef Z_BLOCK
        #error "Z_BLOCK isn't available"
        #endif

and with zlib.h being one of its includes.
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