On Sat, 2009-01-17 at 03:21 +0200, Giorgos Keramidas wrote: > On Sat, 17 Jan 2009 10:03:39 +1000, Da Rock <rock_on_the_...@comcen.com.au> > wrote: > > According to wikipedia Freebsd is only mostly compliant with POSIX, yet > > BSD/OS is fully- why would this be? > > There are parts of FreeBSD that are deliberately "BSD compliant" instead > of POSIX compliant, because this is how they traditionally worked. I am > not a standards' expert, so if you want more details it may be better to > ask by email to the freebsd-standards mailing list. > > > From what I can tell ANSI C is the standard, and POSIX is an > > implementation(?) of that standard (threads, i/o, etc)? Which version of > > these standards is Freebsd at- c89, c90, c99, POSIX 1(b,c, etc)? > > ISO/IEC 9899:1999 is the standard for the C programming language (ANSI C > is a bit ambiguous, because it may refer to an older standard depending > on the context). > > This standard has a non-zero intersection with more than one standard of > the IEEE 1003 series (what is commonly referred to as "POSIX"), but they > are not the same, and it is nto correct to say that one of them is just > an `implementation' of the other. > > There is a bit of information about 'c89', 'c90' and 'ANSI C' in the > Texinfo manual of GCC. It may help clarify some of the terms: > > % info '(gcc)' > > and look at the ``Language Standards Supported by GCC'' section. > > Most of FreeBSD compiles in 'c90' mode. There are a few parts of the > kernel and userland source that use GCC extensions. There are also > parts that use C99 features, i.e. (a) declaration of local variables in > the block they are used, instead of the start of a function, (b) the C99 > syntax for partially initializing structures, and so on. > > Then there are ISO/IEC 9899:1999 features that are not available in the > combination of GCC version and our system libraries. > > So you can't really say that the entire FreeBSD source is `at c90' or > `at c99'. > > The `FreeBSD C99 and POSIX Comformance Project' is an effort to work on > these issues. More information is available online at: > > http://www.freebsd.org/projects/c99/index.html
I'm glad I asked that and got the right answer otherwise I would have started on the wrong preposition. That clarifies it for me nicely- I'll have a look into those areas then... knowing my nature I'll probably come back with a few more questions :P Thanks _______________________________________________ firstname.lastname@example.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"