diff --git a/builds/unix/configure.ac b/builds/unix/configure.ac
new file mode 100644
index 0000000..508864a
--- /dev/null
+++ b/builds/unix/configure.ac
@@ -0,0 +1,91 @@
+dnl This file is part of the FreeType project.
+dnl
+dnl Process this file with autoconf to produce a configure script.
+dnl
+
+AC_INIT
+AC_CONFIG_SRCDIR([ftconfig.in])
+
+dnl configuration file -- stay in 8.3 limit
+AC_CONFIG_HEADER(ftconfig.h:ftconfig.in)
+
+version_info='6:1:0'
+AC_SUBST(version_info)
+ft_version=`echo $version_info | tr : .`
+AC_SUBST(ft_version)
+
+dnl checks for system type
+AC_CANONICAL_TARGET([])
+
+dnl checks for programs
+AC_PROG_CC
+AC_PROG_CPP
+
+dnl get Compiler flags right.
+if test "x$CC" = xgcc; then
+  XX_CFLAGS="-Wall"
+  XX_ANSIFLAGS="-pedantic -ansi"
+else
+  case "$host" in
+    *-dec-osf*)
+      CFLAGS=
+      XX_CFLAGS="-std1 -g3"
+      XX_ANSIFLAGS=
+      ;;
+    *)
+      XX_CFLAGS=
+      XX_ANSIFLAGS=
+      ;;
+  esac
+fi
+AC_SUBST(XX_CFLAGS)
+AC_SUBST(XX_ANSIFLAGS)
+
+AC_CHECK_PROG(RMF, rm, rm -f)
+AC_CHECK_PROG(RMDIR, rmdir, rmdir)
+
+dnl Since this file will be finally moved to another directory we make
+dnl the path of the install script absolute.  This small code snippet has
+dnl been taken from automake's `ylwrap' script.
+AC_PROG_INSTALL
+case "$INSTALL" in
+  /*)
+    ;;
+  */*)
+    INSTALL="`pwd`/$INSTALL" ;;
+esac
+
+dnl checks for header files
+AC_HEADER_STDC
+AC_CHECK_HEADERS(fcntl.h unistd.h)
+
+dnl checks for typedefs, structures, and compiler characteristics
+AC_C_CONST
+AC_CHECK_SIZEOF(int)
+AC_CHECK_SIZEOF(long)
+
+dnl checks for library functions
+
+dnl Here we check whether we can use our mmap file component.
+AC_FUNC_MMAP
+if test "$ac_cv_func_mmap_fixed_mapped" != yes; then
+  FTSYS_SRC='$(BASE_)ftsystem.c'
+else
+  FTSYS_SRC='$(BUILD)/ftsystem.c'
+
+  FT_MUNMAP_DECL
+  FT_MUNMAP_PARAM
+fi
+AC_SUBST(FTSYS_SRC)
+
+AC_CHECK_FUNCS(memcpy memmove)
+
+AC_PROG_LIBTOOL
+
+dnl create the Unix-specific sub-Makefiles `builds/unix/unix-def.mk'
+dnl and 'builds/unix/unix-cc.mk' that will be used by the build system
+dnl
+AC_CONFIG_FILES([unix-cc.mk:unix-cc.in unix-def.mk:unix-def.in freetype-config])
+AC_OUTPUT
+
+dnl end of configure.ac