Next: Long double, Previous: ANSI C Compliance, Up: Using the library
The inline keyword is not part of the original ANSI C standard
(C89) and the library does not export any inline function definitions by
default. However, the library provides optional inline versions of
performance-critical functions by conditional compilation. The inline
versions of these functions can be included by defining the macro
HAVE_INLINE when compiling an application,
$ gcc -Wall -c -DHAVE_INLINE example.c
If you use autoconf this macro can be defined automatically. If
you do not define the macro HAVE_INLINE then the slower
non-inlined versions of the functions will be used instead.
Note that the actual usage of the inline keyword is extern
inline, which eliminates unnecessary function definitions in gcc.
If the form extern inline causes problems with other compilers a
stricter autoconf test can be used, see Autoconf Macros.