Add standard GNU configure and build system (autoconf+automake).

Enable termio backend in sysunix.c (HAVE_TERMIO_H)

Modify original sources to fit standard macros defined in config.h

configure.ac

@@ -0,0 +1,38 @@
+#                                               -*- Autoconf -*-
+# Process this file with autoconf to produce a configure script.
+
+AC_PREREQ(2.61)
+AC_INIT(minix_editline, 0.1.0, joachim@vmlinux.org)
+AC_CONFIG_SRCDIR([src/editline.c])
+AC_CONFIG_HEADER([config.h])
+
+# Prepare automake
+AM_INIT_AUTOMAKE
+
+# Checks for programs.
+AC_PROG_CC
+AC_PROG_RANLIB
+
+# Checks for libraries.
+
+# Checks for header files.
+AC_HEADER_DIRENT
+AC_HEADER_STDC
+AC_CHECK_HEADERS([sgtty.h stdlib.h string.h termio.h termios.h])
+
+# Checks for typedefs, structures, and compiler characteristics.
+AC_HEADER_STAT
+
+# Overrides and types, should be a check.
+AC_DEFINE([SYS_UNIX], [1], [Glue definitions for Minix sources.])
+AC_TYPE_SIZE_T
+
+# Checks for library functions.
+AC_FUNC_CLOSEDIR_VOID
+AC_PROG_GCC_TRADITIONAL
+AC_FUNC_MALLOC
+AC_FUNC_REALLOC
+AC_FUNC_STAT
+AC_CHECK_FUNCS([strchr strdup strrchr])
+
+AC_OUTPUT(Makefile src/Makefile examples/Makefile)