diff --git a/mingw-w64-libraries/winpthreads/configure.ac b/mingw-w64-libraries/winpthreads/configure.ac
new file mode 100644
index 0000000..b579286
--- /dev/null
+++ b/mingw-w64-libraries/winpthreads/configure.ac
@@ -0,0 +1,57 @@
+#                                               -*- Autoconf -*-
+# Process this file with autoconf to produce a configure script.
+
+AC_PREREQ([2.69])
+AC_INIT([mingw-w64-winpthreads], [1.0], [mingw-w64-public@lists.sf.net])
+AC_CONFIG_AUX_DIR([build-aux])
+AC_CONFIG_SRCDIR([src/spinlock.c])
+AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_HEADERS([config.h])
+
+AM_INIT_AUTOMAKE([foreign subdir-objects])
+AM_MAINTAINER_MODE
+
+AC_CANONICAL_HOST
+
+# Checks for programs.
+AC_NO_EXECUTABLES
+AC_PROG_CC
+AC_PROG_RANLIB
+AM_PROG_AS
+AM_PROG_AR
+
+# Libtool 2.4 should check them correctly
+# AC_CHECK_TOOLS([AR],[ar],[:])
+
+# Libtool
+LT_INIT([win32-dll])
+LT_LANG([Windows Resource])
+
+AC_SUBST([LT_OBJDIR],$lt_cv_objdir)
+
+AS_VAR_IF([enable_shared], [yes], [AS_VAR_SET([copy_shared])])
+AS_VAR_IF([enable_static], [yes], [AS_VAR_SET([copy_static])])
+AM_CONDITIONAL( [COPY_SHARED], [AS_VAR_TEST_SET([copy_shared])] )
+AM_CONDITIONAL( [COPY_STATIC], [AS_VAR_TEST_SET([copy_static])] )
+
+# Checks for libraries.
+# FIXME: Replace `main' with a function in `-lpthread':
+#AC_CHECK_LIB([pthread], [main])
+
+# Checks for header files.
+AC_CHECK_HEADERS([limits.h sys/timeb.h])
+
+# Checks for typedefs, structures, and compiler characteristics.
+AC_C_INLINE
+AC_TYPE_SIZE_T
+
+# Checks for library functions.
+#AC_FUNC_MALLOC
+#AC_FUNC_REALLOC
+# mingw-w64 should already have them
+#AC_CHECK_FUNCS([ftime gettimeofday memset])
+
+AC_SUBST([RCFLAGS])
+
+AC_CONFIG_FILES([Makefile])
+AC_OUTPUT