Building Tokyo Cabinet for use with Java on OS X

I've been really interested in playing with Tokyo Cabinet lately. I thought that it would be fun to take a hack at the GitHub Contest using Scala and Tokyo Cabinet. I then set out to build Tokyo Cabinet and its Java bindings (since I can call those easily from Scala). The Java bindings for Tokyo Cabinet are not pure Java, they use JNI, so you need to compile some C as well as Java. Everything looked fine and dandy until I tried to run some code. I then ran into this stack trace from Scala:

	Exception in thread "main" java.lang.UnsatisfiedLinkError: /usr/local/lib/libjtokyocabinet.1.1.0.dylib: no suitable image found. Did find: /usr/local/lib/libjtokyocabinet.1.1.0.dylib: mach-o, but wrong architecture /usr/local/lib/libjtokyocabinet.1.1.0.dylib: mach-o, but wrong architecture
	at java.lang.ClassLoader$NativeLibrary.load(Native Method)
	at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1881)
	at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1798)
	at java.lang.Runtime.loadLibrary0(Runtime.java:823)
	at java.lang.System.loadLibrary(System.java:1047)
	at tokyocabinet.Loader.load(Loader.java:41)
	at tokyocabinet.HDB.<clinit>(HDB.java:37)
	at Blah$.main(Blah.scala:6)
	at Blah.main(Blah.scala)

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To translate, what is going on here is that by default Tokyo Cabinet will build a 32 bit binaries. Java 1.6 on OS X is 64 bit and will look for a 64 bit version of the library. Here is what I did to make things happy.

When running the configure script for Tokyo Cabinet itself, I added a flag:

./configure CFLAGS='-arch x86_64'

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I tried the same trick when configuring the Java bindings, but it didn't seem to end up in the resulting Makefile. So I edited the Makefile by hand. In the end, my CFLAGS line looks like this:

CFLAGS = -std=c99 -Wall -fPIC -fsigned-char -O2 -arch x86_64

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After that, I was able to get a small Scala script to create a Hash database.

As an aside, the Scala IDE for Eclipse seems really nice. I had tried it out a few months ago, and it has clearly made a lot of progress since then.