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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