Building the Darwin Kernel (Mac OS X for Unix Geeks)

7.1. Darwin Development Tools

The Darwin kernel requires a collection of development tools that are not part of the Mac OS X Developer Tools package. To get these tools, visit the Darwin project at http://developer.apple.com/darwin/ and follow the links for the Darwin Development Environment for Mac OS X. Those links lead to a package called darwintools.pkg, which you should install. This package installs a number of header files, libraries, and tools into /usr/local. The tools are described in Table 7-1. The source code for these utilities and libraries can be found in the cctools, mkisofs, Libstreams, and bootstrap_cmds CVS modules. If you are working with an interim or seed release of Darwin or Mac OS X that is out of sync with the current Darwin Development Environment, you may need to check these utilities out and install them yourself.

Tool	Description	CVS module
check_dylib	Checks the integrity of a dynamic library.	cctools
checksyms	Checks a binary to ensure that it adheres to Mac OS X conventions.	cctools
cmpshlib	Compares two versions of a shared library for compatibility.	cctools
decomment	Strips C and C++ comments from an input file.	bootstrap_cmds
devdump	Interactively reads the contents of a device or filesystem image.	mkisofs (as dump.c)
hack_libgcc	Hacks a framework to export backward-compatible symbols.	cctools
indr	Prepends an underscore to selected symbol names in an object file.	cctools
isodump	Interactively reads the contents of an ISO 9660 image.	mkisofs
isoinfo	Reads information from an ISO 9660 image. Use isoinfo -h for a usage summary.	mkisofs
isovfy	Verifies an ISO image.	mkisofs
kern_tool	Supports cross-compilation of the kernel; a hacked version of the nm utility.	cctools
mkhybrid	Creates a hybrid ISO 9660/Joliet/HFS filesystem.	mkisofs
mkisofs	Creates a hard link to mkhybrid.	mkisofs
mkshlib	Creates a host and target shared library. The host shared library looks like a static library to the linker, but at runtime, the target shared library is loaded.	cctools
relpath	Finds and prints a relative pathname, given a starting directory and an ending directory.	bootstrap_cmds
seg_addr_table	Works with segment address tables.	cctools
seg_hack	Changes segment names.	cctools
setdbg	Operates as an interactive kernel debugger.	at_cmds


III. Beyond the User Space		7.2. Getting the Source Code