From: Iain Barnett <iainspeed@...>
Date: 2011-03-25T14:55:07+09:00
Subject: mkmf have_func usage

Hi,

I'm wondering if I'm using the have_func from lib mkmf correctly, as I can't seem to get a `true` out of it? 

    require "mkmf"

    have_func( "iconv_open", "/Library/Frameworks/Libiconv.framework/Headers")
    checking for iconv_open() in /Library/Frameworks/Libiconv.framework/Headers... no
    => false

    have_func( "iconv_open", "/Library/Frameworks/Libiconv.framework/Versions/1.13.1/include/iconv.h")
    checking for iconv_open() in /Library/Frameworks/Libiconv.framework/Versions/1.13.1/include/iconv.h... no
    => false

but if I open up the iconv.h file from above I can quite clearly see iconv_open is defined (even though I know not C)

    #ifndef LIBICONV_PLUG
    #define iconv_open libiconv_open
    #endif

Any push in the right direction will be much appreciated.

Iain