HP-UX Linker and Libraries User's Guide

release for PA-RISC 1.0 systems, so code generated by the HP-UX 10.20 release of HP compilers
is not supported on PA-RISC 1.0 systems.
NOTE: The +DA1.0 option will be obsolete in a future release. You can achieve better
performance on PA-RISC 1.1 and 2.0 systems by not using this option.
PA-RISC 2.0 Compatibility
The instruction set on PA-RISC 2.0 is a superset of the instruction set on PA-RISC 1.1. As a result,
code generated for PA-RISC 1.1 systems run on PA-RISC 2.0 systems. However, code generated
for PA-RISC 2.0 systems does not run on PA-RISC 1.1 or 1.0. If you have enabled the
+vcompatwarnings, the linker displays the following hardware compatibility warning whenever
it links in any PA-RISC 2.0 object files:
/usr/ccs/bin/ld: (Warning) At least one PA 2.0 object file
(sum.o) was detected. The linked output may not run on PA 1.x
system.
If you try to run a PA-RISC 2.0 program on a 1.1 system, you see a message like:
$ a.out
ksh: ./a.out: Executable file incompatible with hardware
In this example, the +DAportable compiler option can be used to create code compatible with
PA-RISC 1.1 and 2.0 systems.
PA-RISC Architectures and Their System Models
The HP 9000 PA-RISC (Precision Architecture Reduced Instruction Set Computing) Series 700/800
family of workstations and servers has evolved from the following versions of PA-RISC architecture:
Table 13 Versions of PA-RISC architecture
The original version of PA-RISC was first introduced on Series 800 servers. The following Series
were included: 840, 825, 835/SE, 845/SE, 850, 855, 860, 865, 870/x00, 822, 832, 842,
852, 890, 808, 815, 635, 645.
PA-RISC 1.0
The second version of PA-RISC was first introduced on Series 700 workstations. Newer Series
800 systems also use this version of the architecture. The following Series were included: 700,
PA-RISC 1.1
705, 710, 712, 715, 720, 725, 730, 735, 750, 755, B132L, B160L, B132L+, B180L, C100,
C110, J200, J210, J210XC, 742i, 742rt, 743i, 743rt, 745i, 747i, 748i, 8x7, D (except Dx70,
Dx80), E, F, G, H, I, K (except Kx50, Kx60, Kx70), T500, T520.
This is the latest version of PA-RISC. The following Series are included: B2600/C3000, C160,
C180, C180XP, C200, C240, J280, J282, J2240, Dx70, Dx80, Kx50, Kx60, Kx70, T600,
V2200.
PA-RISC 2.0
For More Information
• See your compiler online help or documentation for more information on the +DA option.
• See the file /opt/langtools/lib/sched.models for a complete list of model numbers
and their architectures. Use the command model to determine the model number of your
system.
Link-time Differences Between SOM (PA32) and ELF (PA64 and Itanium)
This section summarizes the significant PA32 (System Object Module (SOM) file) features, behavior,
and options that linker does not support in PA64 mode and Itanium-based 32-bit and 64-bit mode
(Executable and Linking Format (ELF) file format). The following table summarizes the differences
in option, behavior, and toolset between PA-32 and IPF/PA-64 bit modes (IPF (64-bit and 32-bit)
and PA-64):
80 Linker Toolset Differences Between PA-RISC and Itanium-Based Systems