HP aC++/HP ANSI C A.06.27 Release Notes

4 Installation information
Read this entire document and any other release notes or readme files you may have before you
begin an installation.
To install your software, run the SD-UX swinstall command. This invokes a user interface that
will lead you through the installation.
For more information about installation procedures and related issues, refer Managing HP-UX
Software with SD-UX and other README, installation, and upgrade documentation provided or
described in your HP-UX 11.x operating system package.
Depending on your environment, you may also need documentation for other parts of your system,
such as networking, system security, and windowing.
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 0x100000000, or 4 GB (the default for this parameter is
0x100000000, or 4 GB) for "maxdsiz_64bit" in such cases. Updating the "maxdsiz_64bit"
tunable will ensure that the compiler does not run out of virtual memory when compiling large files
or functions.
In addition, "maxssiz_64bit" should be set to 128 MB for very large or complex input files.
(Normally a "maxssiz_64bit" setting of 64 MB will be sufficient.)
HP recommends not reducing the maxfiles setting below the default value of 2048.
See the kctune man page for more information on how to change kernel tunable parameters.
HP aC++ requires approximately 150 MB for the files in
/opt/aCC
The other components require approximately:
• 40 MB for WDB
• 110 MB for u2comp/be
• 95 MB for HP Caliper
• 205 MB for HP Code Advisor
For more precise sizes, use the command:
/usr/sbin/swlist -a size B9007AA
Hardware requirements 41