Fix autotools on FreeBSD.

Endianness fun is not provided by the same header file on GNU/Linux (endian.h) and FreeBSD (sys/endian.h).  Add some magic for the autotools to detect the correct header file.  While here, add AC_C_INLINE: it's reported as missing by autoscan(1).

configure.ac

@@ -7,11 +7,14 @@ AC_PROG_CXX
 
 AC_PROG_LIBTOOL
 
+AC_CONFIG_HEADERS([config.h])
+
 AM_INIT_AUTOMAKE
 
 m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])
 
 # Checks for typedefs, structures, and compiler characteristics.
+AC_C_INLINE
 AC_HEADER_STDBOOL
 AC_TYPE_INT16_T
 AC_TYPE_INT32_T
@@ -25,6 +28,11 @@ AC_FUNC_MALLOC
 AC_FUNC_REALLOC
 AC_CHECK_FUNCS([memset])
 
+AC_CHECK_HEADERS([endian.h sys/endian.h])
+if test $ac_cv_header_endian_h = "no" -a $ac_cv_header_sys_endian_h = "no"; then
+  AC_MSG_ERROR([Can't locate header endian.h.]);
+fi
+
 # Checks for pkg-config modules.
 PKG_CHECK_MODULES([LIBNFC], [libnfc], [], [AC_MSG_ERROR([libnfc is mandatory.])])
 
@@ -32,3 +40,4 @@ PKG_CONFIG_REQUIRES="libnfc"
 AC_SUBST([PKG_CONFIG_REQUIRES])
 
 AC_OUTPUT([Makefile libfreefare.pc])
+

mad.c

@@ -25,6 +25,7 @@
  * MIFARE Application Directory (MAD)
  * Rev. 04 - 5 March 2009
  */
+#include "config.h"
 
 #include <stdlib.h>
 #include <errno.h>

mifare_application.c

@@ -23,6 +23,8 @@
  *
  * /dev/brain
  */
+#include "config.h"
+
 #include <stdlib.h>
 
 #include <mifare_application.h>

mifare_classic.c

@@ -29,8 +29,16 @@
  * October 6, 2008
  */
 
-#define _BSD_SOURCE
-#include <endian.h>
+#include "config.h"
+
+#if defined(HAVE_SYS_ENDIAN_H)
+#  include <sys/endian.h>
+#endif
+
+#if defined(HAVE_ENDIAN_H)
+#  define _BSD_SOURCE
+#  include <endian.h>
+#endif
 #include <errno.h>
 #include <stdlib.h>
 #include <string.h>