Advanced Mac OS X Programming: The Big Nerd Ranch Guide

For the More Curious: libtool

Earlier in the chapter, the class Unix tools ar and ranlib were used to build static libraries, and gcc was used to build a dynamic library. Mac OS X has a tool, libtool, which is peculiar to the platform, but provides a superset of features over ar and friends. The GNU project also has a libtool, but it is unrelated to the one in Mac OS X.

Make a static library like this and use it:

$​ ​l​i​b​t​o​o​l​ ​-​s​t​a​t​i​c​ ​-​o​ ​l​i​b​a​d​d​u​m​.​a​ ​s​r​c​?​.​o​
$​ ​g​c​c​ ​-​g​ ​-​o​ ​u​s​e​a​d​d​ ​u​s​e​a​d​d​.​m​ ​-​L​.​ ​-​l​a​d​d​u​m​

And dynamic libraries (but not bundles) can be created thusly:

$​ ​l​i​b​t​o​o​l​ ​-​d​y​n​a​m​i​c​ ​-​m​a​c​o​s​x​_​v​e​r​s​i​o​n​_​m​i​n​ ​1​0​.​5​ ​-​o​ ​l​i​b​a​d​d​u​m​.​d​y​l​i​b​ ...