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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 */