OSDev.wiki

Portability: Difference between revisions

[unchecked revision][unchecked revision]
← Older editNewer edit →
Content deleted Content added
VisualWikitext
No edit summary
No edit summary
Line 1:
 
== Theory ==
While you might be content to write a kernel that functions on only x86 IBM compatible computers, the truth is there are many other platforms on which to write a kernel. These range from the long dead, such as Amiga and Alpha Processor-based computers, to the relevant ARM architectures. Traditionally, the operating system was specific to an architecture, which allowed user programs to take full advantage of their hardware designs. UNIX however, changed this with the introduction of the C programming language, which allowed UNIX (And other programs) to be ported to almost every system ever conceived with only minor adjustments. An operating system's core, the kernel is designed to deal with the hardware, so the Operating[[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]] {{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}} [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]] {{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}} [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]] {{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}} [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]] {{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}} [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]] {{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}} [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Eiriley.jpg]] [[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]][[File:Dayn.jpg]] {{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}}{{BeginnersWarning}} System can be oblivious to hardware changes. However, most kernel code can be reused on different architectures that share similar hardware, such as USB, and PCI buses.
While you might be content to write a kernel that functions on only x86 IBM compatible computers, the truth is there are many other platforms on which to write a kernel. These range from the long dead, such as Amiga and Alpha Processor-based computers, to the relevant ARM architectures. Traditionally, the operating system was specific to an architecture, which allowed user programs to take full advantage of their hardware designs. UNIX however, changed this with the introduction of the C programming language, which allowed UNIX (And other programs) to be ported to almost every system ever conceived with only minor adjustments. An operating system's core, the kernel is designed to deal with the hardware, so the Operating System can be oblivious to hardware changes. However, most kernel code can be reused on different architectures that share similar hardware, such as USB, and PCI buses.
 
== Practical ==
Retrieved from "https://osdev.wiki/wiki/Portability"