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15.5.1 C, C++, Objective C

RPMs
gcc, gpp, gobjc, glibc, gettext
File extension
For C: c, h.
For C++: C, c++, cc, cxx, cpp, hpp.
For Objective C: m.
String syntax
"abc"
gettext shorthand
_("abc")
gettext/ngettext functions
gettext, dgettext, dcgettext, ngettext, dngettext, dcngettext
textdomain
textdomain function
bindtextdomain
bindtextdomain function
setlocale
Programmer must call setlocale (LC_ALL, "")
Prerequisite
#include <libintl.h>
#include <locale.h>
#define _(string) gettext (string)
Use or emulate GNU gettext
Use
Extractor
xgettext -k_
Formatting with positions
fprintf "%2$d %1$d"
In C++: autosprintf "%2$d %1$d" (see Introduction)
Portability
autoconf (gettext.m4) and #if ENABLE_NLS
po-mode marking
yes

The following examples are available in the examples directory: hello-c, hello-c-gnome, hello-c++, hello-c++-qt, hello-c++-kde, hello-c++-gnome, hello-c++-wxwidgets, hello-objc, hello-objc-gnustep, hello-objc-gnome.