[PATCH] Autoconf: Disable inline for compilers that don't support it.

[Allan Caffee <allan.caffee@gmail.com>]

The Autoconf macro AC_C_INLINE will redefine the inline keyword to whatever the
current compiler supports (including possibly nothing).

Signed-off-by: Allan Caffee <allan.caffee@gmail.com>
---
On Wed, 14 Jan 2009, Miklos Vajna wrote:
> On Wed, Jan 14, 2009 at 01:32:56PM -0500, Corey Stup
> <coreystup@gmail.com> wrote:
> > When trying to compile with a C89 compliant compiler, I'm coming
> > across a couple issues:
> > - "inline" use
>
> AFAIK that can be avoided with -Dinline=.

But some compilers support other variations of this like __inline__ or
__inline.  Luckily Autoconf has a builtin method for handling this.

diff --git a/configure.ac b/configure.ac
index 082a03d..69fa25e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -308,6 +308,9 @@ AC_SUBST(OLD_ICONV)
 ## Checks for typedefs, structures, and compiler characteristics.
 AC_MSG_NOTICE([CHECKS for typedefs, structures, and compiler characteristics])
 #
+# Check for compilers ability to inline functions.
+AC_C_INLINE
+#
 # Define NO_D_INO_IN_DIRENT if you don't have d_ino in your struct dirent.
 AC_CHECK_MEMBER(struct dirent.d_ino,
 [NO_D_INO_IN_DIRENT=],
-- 
1.5.4.3