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See Also

These resources provide information related to compiling and building applications, and measuring performance:

• Xcode User Guide contains all the instructions needed to compile and debug any type of Xcode project (C, C++, Objective C, Java, AppleScript, resource, nib files, and so forth).

• GCC Porting Guide provides advice for how to modify your code in ways that make it more compatible with GCC 4.0.

• GNU C/C++/Objective-C 4.0.1 Compiler User Guide provides details about the GCC implementation. Xcode uses the GNU compiler collection (GCC) to compile code.

  The assembler (as) used by Xcode supports AT&T System V/386 assembler syntax in order to maintain compatibility with the output from GCC. The AT&T syntax is quite different from Intel syntax. The major differences are discussed in the GNU documentation.

• C++ Runtime Environment Programming Guide provides information on the GCC 4.0 shared C++ runtime that is available in Panther 10.3.9 and later.

• Porting UNIX/Linux Applications to Mac OS X. Developers porting from UNIX and Linux applications who want to compile a universal binary, will want to read the section Compiling for Multiple Architectures.

• Kernel Extension Programming Topics contains information about debugging KEXTs on Intel-based Macintosh computers.

• Performance tools. Shark, MallocDebug, ObjectAlloc, Sampler, Quartz Debug, Thread Viewer, and other Apple-developed tools (some command-line, others use a GUI) are in the /Developer directory. Command-line performance tools are in the /usr/bin directory.

• Code Size Performance Guidelines and Code Speed Performance Guidelines discuss optimization strategies for a Mach-O executable.

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