# Process this file with autoconf to produce a configure script.
-AC_INIT([freeglut library], [2.2.0], [freeglut-bugs@lists.sourceforge.net], [freeglut])
+AC_INIT([freeglut library], [2.4.0], [freeglut-bugs@lists.sourceforge.net], [freeglut])
AM_INIT_AUTOMAKE
-AC_PREREQ([2.59])
+AC_PREREQ([2.56])
AC_CONFIG_SRCDIR([AUTHORS])
AC_CONFIG_HEADERS([config.h])
+# Compatibility hack for older autoconf versions
+m4_ifdef([AS_HELP_STRING], [], [AC_DEFUN([AS_HELP_STRING], [AC_HELP_STRING($][@)])])
+
# Checks for programs.
AC_PROG_CC
AC_C_CONST
# Checks for header files.
AC_HEADER_STDC
-AC_CHECK_HEADERS([GL/gl.h GL/glu.h GL/glx.h])
+AC_CHECK_HEADERS([GL/gl.h GL/glu.h GL/glx.h fcntl.h limits.h sys/ioctl.h sys/param.h sys/time.h])
+AC_HEADER_TIME
save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $X_CFLAGS"
CFLAGS="$save_CFLAGS"
# Checks for library functions.
+AC_PROG_GCC_TRADITIONAL
+AC_FUNC_VPRINTF
AC_CHECK_LIBM
AC_SUBST([LIBM])
CFLAGS="$CFLAGS -Wall -pedantic -Werror"
fi
+AC_ARG_ENABLE([debug],
+[AS_HELP_STRING([--enable-debug],
+ [enable debug (for developers) @<:@default=no@:>@])])
+
+if test "x$enable_debug" = xyes; then
+ AC_DEFINE([_DEBUG], [1], [Define to 1 if you want to include debugging code.])
+fi
+
# Generate output.
AC_CONFIG_FILES([Makefile
doc/Makefile