Hardware Requirements




	IMPORTANT: Compiling files at optimization level 2 (-O or +O2) and above increases the amount of virtual memory needed by the compiler. In cases where very large functions or files are compiled at +O2, or in cases where aggressive (+O3 and above) optimization is used, ensure that the `maxdsiz` kernel tunable is set appropriately on the machine where compilation takes place. HP recommends a setting of 0x80000000, or 2 Gb (the default for this parameter is 0x40000000, or 1 Gb) in such cases. Updating the `maxdsiz` tunable will ensure that the compiler does not run out of virtual memory when compiling large files or functions. In addition, maxssiz should be set to 128 MB for very large or complex input files. Normally the default maxssiz setting of 64 MB will be sufficient. HP recommends not reducing the maxfiles setting below the default value of 1024. See the kctune man page for more information on how to change kernel tunable parameters.

HP aC++ requires approximately 120 MB for the files in

/opt/aCC

HP ANSI C requires approximately 100 MB for the files in

/opt/ansic

The other components require approximately:

For more precise sizes, use the command:

/usr/sbin/swlist -a size "YourProductNumber"

Technical documentation