From: Tristin Davis <tristin.colby@...>
Date: 2008-07-07T01:55:50+09:00
Subject: mkmf isn't finding my shared object to link with

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I have an extension I wrote which is actually just a wrapper for a C api.
The directory structure looks like this.
.
|-- Makefile
|-- extconf.rb
|-- extconf.rb~
|-- libmdc.so
|-- mdc.h
|-- metadata-backup.c~
|-- metadata.c
|-- metadata.c~
|-- metadata.o
|-- metadata.so
`-- mkmf.log

When I generate the makefile, it doesn't find libmdc.so.  How can I fix
this?

require 'mkmf'

have_header("mdc.h")
have_library('libmdc.so','MDOpenConnection')

dir_config('metadata')
create_makefile('metadata')

When I run it, I get

checking for mdc.h... yes
checking for MDOpenConnection() in -llibmdc.so... no
creating Makefile

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