$ otool -L blib/arch/auto/DBD/mysql/mysql.bundle blib/arch/auto/DBD/mysql/mysql.bundle: /sw/lib/mysql/libmysqlclient.15.dylib (compatibility version 16.0.0, current version 16.0.0) /usr/lib/libz.1.dylib (compatibility version 1.0.0, current version 1.2.3) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 124.1.1) $ file /sw/lib/mysql/libmysqlclient.15.dylib /sw/lib/mysql/libmysqlclient.15.dylib: Mach-O dynamically linked shared library i386 $ file blib/arch/auto/DBD/mysql/mysql.bundle blib/arch/auto/DBD/mysql/mysql.bundle: Mach-O universal binary with 3 architectures blib/arch/auto/DBD/mysql/mysql.bundle (for architecture x86_64): Mach-O 64-bit bundle x86_64 blib/arch/auto/DBD/mysql/mysql.bundle (for architecture i386): Mach-O bundle i386 blib/arch/auto/DBD/mysql/mysql.bundle (for architecture ppc7400): Mach-O bundle ppc