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/* Decision whether to use 'inline' or not.
Copyright (C) 2006, 2009 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2009. */
#ifndef _UNISTRING_INLINE_H
#define _UNISTRING_INLINE_H
/* This is like the gl_INLINE macro in gnulib/m4/inline.m4, but makes its
decision based on defined preprocessor symbols rather than through
autoconf tests.
See <http://lists.gnu.org/archive/html/bug-gnulib/2006-11/msg00055.html> */
/* Test for the 'inline' keyword or equivalent. ISO C 99 semantics is not
required, only that 'static inline' works.
Define 'inline' to a supported equivalent, or to nothing if not supported,
like AC_C_INLINE does. Also, define UNISTRING_HAVE_INLINE if 'inline' or an
equivalent is effectively supported, i.e. if the compiler is likely to
drop unused 'static inline' functions. */
#if defined __GNUC__
/* GNU C or GNU C++. */
# if defined __NO_INLINE__
/* GCC defines __NO_INLINE__ if not optimizing or if -fno-inline is
specified. */
# define UNISTRING_HAVE_INLINE 0
# else
/* Whether 'inline' has the old GCC semantics or the ISO C 99 semantics,
does not matter. */
# define UNISTRING_HAVE_INLINE 1
# ifndef inline
# define inline __inline__
# endif
# endif
#elif defined __cplusplus
/* Any other C++ compiler. */
# define UNISTRING_HAVE_INLINE 1
#else
/* Any other C compiler. */
# if defined __osf__
/* OSF/1 cc has inline. */
# define UNISTRING_HAVE_INLINE 1
# elif defined _AIX || defined __sgi
/* AIX 4 xlc, IRIX 6.5 cc have __inline. */
# define UNISTRING_HAVE_INLINE 1
# ifndef inline
# define inline __inline
# endif
# else
/* Some older C compiler. */
# define UNISTRING_HAVE_INLINE 0
# endif
#endif
#endif /* _UNISTRING_INLINE_H */
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