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authormarha <marha@users.sourceforge.net>2010-02-14 13:47:55 +0000
committermarha <marha@users.sourceforge.net>2010-02-14 13:47:55 +0000
commit8d38172d866775594af3185ae3fbd8d750677650 (patch)
tree2514d176474cc8adf7911a57724cc681c1359b47 /xorg-server/doc/c-extensions
parent26f62ef5ccd04fa3a55632d808ca6e1061cfb983 (diff)
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Updated to xorg-server-1.7.99.901
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-First of all: C89 or better. If you don't have that, port gcc first.
-
-Use of C language extensions throughout the X server tree
----------------------------------------------------------
-
-Optional extensions:
-The server will still build if your toolchain does not support these
-extensions, although the results may not be optimal.
-
- * _X_SENTINEL(x): member x of the passed structure must be NULL, e.g.:
- void parseOptions(Option *options _X_SENTINEL(0));
- parseOptions("foo", "bar", NULL); /* this is OK */
- parseOptions("foo", "bar", "baz"); /* this is not */
- This definition comes from Xfuncproto.h in the core
- protocol headers.
- * _X_ATTRIBUTE_PRINTF(x, y): This function has printf-like semantics;
- check the format string when built with
- -Wformat (gcc) or similar.
- * _X_EXPORT: this function should appear in symbol tables.
- * _X_HIDDEN: this function should not appear in the _dynamic_ symbol
- table.
- * _X_INTERNAL: like _X_HIDDEN, but attempt to ensure that this function
- is never called from another module.
- * _X_INLINE: inline this functon if possible (generally obeyed unless
- disabling optimisations).
- * _X_DEPRECATED: warn on use of this function.
-
-Mandatory extensions:
-The server will not build if your toolchain does not support these extensions.
-
- * named initialisers: explicitly initialising structure members, e.g.:
- struct foo bar = { .baz = quux, .brian = "dog" };
- * variadic macros: macros with a variable number of arguments, e.g.:
- #define DebugF(x, ...) /**/
- * interleaved code and declarations: { foo = TRUE; int bar; do_stuff(); }
-
-
-Use of OS and library facilities throughout the X server tree
--------------------------------------------------------------
-
-Non-OS-dependent code can assume facilities at least as good as
-the non-OS-facility parts of POSIX-1.2001. Ideally this would
-be C99, but even gcc+glibc doesn't implement that yet.
-
-Unix-like systems are assumed to be at least as good as UNIX03.
-
-Linux systems must be at least 2.4 or later. As a practical matter
-though, 2.4 kernels never receive any testing. Use 2.6 already.
-
-TODO: Solaris.
-
-TODO: *BSD.
-
-Code that needs to be portable to Windows should be careful to,
-well, be portable. Note that there are two Windows ports, cygwin and
-mingw. Cygwin is more or less like Linux, but mingw is a bit more
-restrictive. TODO: document which versions of Windows we actually care
-about.
-
-OSX support is generally limited to the most recent version. Currently
-that means 10.5.