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Leopard Reference Library: Tools
A full suite of free developer tools is available to Mac OS X developers, who can speed up their development process by using these tools to prototype, compile, debug, and optimize their software products. As part of this suite, Apple provides a wide selection of open source tools, such as GCC and GDB.

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Dynamic Loader Release Notes (HTML)
Updated for Mac OS X v10.5.
Release Notes 2009-03-04
Mac OS X ABI Mach-O File Format Reference (HTML) (PDF)
Describes the data structures that make up the Mach-O file format.
Reference 2009-02-04
Kernel Core Dumps (HTML)
TN2118: Explains how to gather and use remote kernel core dumps.
Technical Notes 2008-11-12
Netwide Assembler Guide (HTML)
Describes the Netwide Assembler for Intel-based Macs.
Reference 2008-06-19
Mac OS X Man Pages (HTML)
HTML versions of the Mac OS X, Mac OS X Server, Xcode Tools, and CHUD man pages.
Reference 2008-04-29
HeaderDoc User Guide (HTML) (PDF)
Explains how to extract API reference documentation from commented header files.
Guides 2008-04-08
Porting UNIX/Linux Applications to Mac OS X (HTML) (PDF)
Conceptual information and tips about porting UNIX and Linux applications to Mac OS X.
Guides 2008-04-08
GNU C 4.2 Preprocessor User Guide (HTML)
Describes the Apple version of the GNU C 4.2 Preprocessor.
Reference 2008-01-23
GNU C/C++/Objective-C 4.2.1 Compiler User Guide (HTML)
Describes the Apple version of the GNU 4.2.1 compiler.
Reference 2008-01-23
GNU C 4.0 Preprocessor User Guide (HTML)
Describes the Apple version of the GNU C 4.0 Preprocessor.
Reference 2007-10-31
GNU C/C++/Objective-C 4.0.1 Compiler User Guide (HTML)
Describes the Apple version of the GNU 4.0.1 compiler.
Reference 2007-10-31
Symbol Variants Release Notes (HTML)
Describes symbol variants, a way of providing multiple versions of symbols for backwards compatibility.
Release Notes 2007-10-16
SimplePing (HTML) (DMG) (ZIP)
Sample provides simple API to programatically ping a remote host without admin privileges
Sample Code 2003-10-27
PIDFromBSDProcessName (HTML) (DMG) (ZIP)
Provides a simple API to do process PID lookup based on BSD process name.
Sample Code 2003-02-13
Static linking of user binaries on Mac OS X (HTML) (日本語 HTML)
QA1118: Explains why static linking of user binaries is not supported on Mac OS X, and possible workarounds.
Technical Q&As 2002-02-07
Setting environment variables for user processes (HTML)
QA1067: Tells how to set environment variables for user processes.
Technical Q&As 2001-10-25
Packaging UNIX Software (HTML)
Explains how to post UNIX and other command-line tools to Apple's Macintosh Product Guide.
Guides 2001-04-20
GNU C/C++/Objective-C 3.3 Compiler (HTML)
Explains how to use the GNU compilers from the command line.
Reference