Editing IRIX (section)

==Features==
IRIX 6.5 is compliant with [[UNIX System V]] Release 4, [[UNIX 95]], and [[POSIX]] (including 1e/2c draft 15 [[Access Control List|ACL]]s and Capabilities).<ref name=bs-irix>{{Cite web|url=https://www.operating-system.org/betriebssystem/_english/bs-irix.htm|title=IRIX Operating System (Unix)|website=operating-system.org}}</ref>

In the early 1990s, IRIX was a leader in [[Symmetric multiprocessing|Symmetric Multi-Processing (SMP)]], scalable from 1 to more than 1,024 processors with a single system image. IRIX has strong support for real-time disk and graphics I/O. IRIX was widely used for the 1990s and 2000s in the [[computer animation]] and [[scientific visualization]] industries, due to its large application base and high performance. It still is relevant in a few legacy applications.

IRIX is one of the first Unix versions to feature a [[graphical user interface]] for the main desktop environment. [[IRIX Interactive Desktop]] uses the [[4Dwm]] [[X window manager]] with a custom look designed using the [[Motif (software)|Motif widget toolkit]].<ref name=5dwm/> IRIX is the originator of the industry standard [[OpenGL]] for graphics chips and image processing libraries.<ref name=seddon>{{cite book|title=OpenGL Game Development|page=43|chapter=History of OpenGL|author=Seddon, Chris|publisher=Wordware|year=2005|isbn=1-55622-989-5|chapter-url=https://books.google.com/books?id=ahb5bqeLROAC&q=IRIS+GL&pg=PA43}}</ref><ref name=OpenGLs_PrehistoryIRIS_GL>{{cite web|author=Kilgard, Mark|url=https://www.slideshare.net/Mark_Kilgard/sigraph-asia-2008-modern-opengl-presentation/13-13OpenGLs_PrehistoryIRIS_GL_1Window_system|title=OpenGL Prehistory: IRIS GL (slide from SIGGRAPH talk)|website=www.slideshare.net|year=2008}}</ref><ref name=opengl/overview>{{cite web|url=http://www.sgi.com/products/software/opengl/overview.html|title=SGI – OpenGL Overview|archive-url=https://web.archive.org/web/20041031094901/http://www.sgi.com/products/software/opengl/overview.html|archive-date=October 31, 2004|access-date=August 19, 2024|url-status=live}}</ref><ref name="g926">{{cite web|last1=Peddie|first1=Jon|title=Who's the Fairest of Them All?|url=http://www.cgw.com/Publications/CGW/2012/Volume-35-Issue-4-June-July-2012/Who-s-the-Fairest-of-Them-All-.aspx|publisher=Computer Graphics World|access-date=August 19, 2024|date=July 2012}}</ref><ref name=opengl_arb_khronos>{{Cite web|date=July 31, 2006|title=OpenGL ARB to Pass Control of OpenGL Specification to Khronos Group|url=https://www.khronos.org/news/press/opengl_arb_to_pass_control_of_opengl_specification_to_khronos_group|access-date=August 19, 2024|website=The Khronos Group|language=en}}</ref>

IRIX uses the [[Open64|MIPSPro]] compiler for both its front end and back end. The compiler, also known in earlier versions as IDO (IRIS Development Option), was released in many versions, many of which are coupled to the OS version. The last version was 7.4.4m, designed for 6.5.19 or later.  The compiler is designed to support parallel [[POSIX]] programming in C/C++, Fortran 77/90, and Ada. The Workshop GUI IDE is used for development.  Other tools include Speedshop for performance tuning, and [[Performance Co-Pilot]].<ref>{{cite web| url=https://irix7.com/techpubs/007-3964-002.pdf|title=Performance Co-Pilot IRIX® Base Software Administrator's Guide|publisher=Silicon Graphics, Inc.|website=irix7.com}}</ref>