diff -ru --new-file a/build-aux/config.sub b/build-aux/config.sub
--- a/build-aux/config.sub	2013-03-22 00:20:48.000000000 -0400
+++ b/build-aux/config.sub	2015-06-01 13:14:12.662901110 -0400
@@ -1365,7 +1365,7 @@
 	      | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
 	      | -chorusos* | -chorusrdb* | -cegcc* \
 	      | -cygwin* | -msys* | -pe* | -psos* | -moss* | -proelf* | -rtems* \
-	      | -mingw32* | -mingw64* | -linux-gnu* | -linux-android* \
+	      | -midipix* | -mingw32* | -mingw64* | -linux-gnu* | -linux-android* \
 	      | -linux-newlib* | -linux-musl* | -linux-uclibc* \
 	      | -uxpv* | -beos* | -mpeix* | -udk* \
 	      | -interix* | -uwin* | -mks* | -rhapsody* | -darwin* | -opened* \
diff -ru --new-file a/configure b/configure
--- a/configure	2013-03-24 14:03:03.000000000 -0400
+++ b/configure	2015-06-01 13:15:51.350899788 -0400
@@ -14,6 +14,8 @@
 ## M4sh Initialization. ##
 ## -------------------- ##
 
+. $(dirname $0)/./gnulib.cache || exit 2
+
 # Be more Bourne compatible
 DUALCASE=1; export DUALCASE # for MKS sh
 if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then :
diff -ru --new-file a/gnulib.cache b/gnulib.cache
--- a/gnulib.cache	1969-12-31 19:00:00.000000000 -0500
+++ b/gnulib.cache	2015-06-01 13:14:57.158900514 -0400
@@ -0,0 +1,122 @@
+# provide gnulib with information about modern systems
+export ac_cv_func_calloc_0_nonnull=yes
+export ac_cv_func_chown_works=yes
+export ac_cv_func_getgroups_works=yes
+export ac_cv_func_malloc_0_nonnull=yes
+export gl_cv_func_cbrtl_ieee=yes
+export gl_cv_func_ceilf_ieee=yes
+export gl_cv_func_ceil_ieee=yes
+export gl_cv_func_ceill_ieee=yes
+export gl_cv_func_chown_ctime_works=yes
+export gl_cv_func_chown_slash_works=yes
+export gl_cv_func_exp2l_ieee=yes
+export gl_cv_func_expm1_ieee=yes
+export gl_cv_func_fcntl_f_dupfd_works=yes
+export gl_cv_func_fdopendir_works=yes
+export gl_cv_func_floorf_ieee=yes
+export gl_cv_func_fflush_stdin=yes
+export gl_cv_func_fmaf_works=yes
+export gl_cv_func_fmal_works=yes
+export gl_cv_func_fma_works=yes
+export gl_cv_func_fmodf_ieee=yes
+export gl_cv_func_fmod_ieee=yes
+export gl_cv_func_fmodl_ieee=yes
+export gl_cv_func_fpurge_works=yes
+export gl_cv_func_fseeko=yes
+export gl_cv_func_futimens_works=yes
+export gl_cv_func_futimesat_works=yes
+export gl_cv_func_getgroups_works=yes
+export gl_cv_func_gettimeofday_clobber=no
+export gl_cv_func_hypotf_ieee=yes
+export gl_cv_func_hypotl_ieee=yes
+export gl_cv_func_hypot_ieee=yes
+export gl_cv_func_isfinitel_works=yes
+export gl_cv_func_isnanl_works=yes
+export gl_cv_func_linkat_slash=yes
+export gl_cv_func_link_works=yes
+export gl_cv_func_log10f_ieee=yes
+export gl_cv_func_log10_ieee=yes
+export gl_cv_func_log1pf_ieee=yes
+export gl_cv_func_log1p_ieee=yes
+export gl_cv_func_log1pl_ieee=yes
+export gl_cv_func_log2f_ieee=yes
+export gl_cv_func_log2_ieee=yes
+export gl_cv_func_logf_ieee=yes
+export gl_cv_func_log_ieee=yes
+export gl_cv_func_lstat_dereferences_slashed_symlink=yes
+export gl_cv_func_mbrlen_empty_input=yes
+export gl_cv_func_mbrtowc_empty_input=yes
+export gl_cv_func_memchr_works=yes
+export gl_cv_func_memmem_works_fast=yes
+export gl_cv_func_mkdir_trailing_dot_works=yes
+export gl_cv_func_mkdir_trailing_slash_works=yes
+export gl_cv_func_mkfifo_works=yes
+export gl_cv_func_mknod_works=yes
+export gl_cv_func_modff_ieee=yes
+export gl_cv_func_modf_ieee=yes
+export gl_cv_func_modfl_ieee=yes
+export gl_cv_func_nanosleep=yes
+export gl_cv_func_open_directory_works=yes
+export gl_cv_func_perror_works=yes
+export gl_cv_func_printf_directive_a=yes
+export gl_cv_func_printf_directive_f=yes
+export gl_cv_func_printf_directive_n=yes
+export gl_cv_func_printf_enomem=yes
+export gl_cv_func_printf_flag_zero=yes
+export gl_cv_func_printf_infinite_long_double=yes
+export gl_cv_func_printf_infinite=yes
+export gl_cv_func_printf_sizes_c99=yes
+export gl_cv_func_pselect_detects_ebadf=yes
+export gl_cv_func_ptsname_sets_errno=yes
+export gl_cv_func_readlink_works=yes
+export gl_cv_func_realpath_works=yes
+export gl_cv_func_remainderf_ieee=yes
+export gl_cv_func_remainder_ieee=yes
+export gl_cv_func_remainderl_ieee=yes
+export gl_cv_func_rename_dest_works=yes
+export gl_cv_func_rename_link_works=yes
+export gl_cv_func_rename_slash_dst_works=yes
+export gl_cv_func_rename_slash_src_works=yes
+export gl_cv_func_rmdir_works=yes
+export gl_cv_func_roundf_ieee=yes
+export gl_cv_func_round_ieee=yes
+export gl_cv_func_select_detects_ebadf=yes
+export gl_cv_func_setenv_works=yes
+export gl_cv_func_signbit_gcc=yes
+export gl_cv_func_signbit=yes
+export gl_cv_func_sleep_works=yes
+export gl_cv_func_snprintf_directive_n=yes
+export gl_cv_func_snprintf_retval_c99=yes
+export gl_cv_func_snprintf_truncation_c99=yes
+export gl_cv_func_stat_dir_slash=yes
+export gl_cv_func_stat_file_slash=yes
+export gl_cv_func_stpncpy=yes
+export gl_cv_func_strcasestr_linear=yes
+export gl_cv_func_strchrnul_works=yes
+export gl_cv_func_strerror_0_works=yes
+export gl_cv_func_strstr_linear=yes
+export gl_cv_func_strtod_works=yes
+export gl_cv_func_svid_putenv=yes
+export gl_cv_func_symlink_works=yes
+export gl_cv_func_tdelete_works=yes
+export gl_cv_func_truncf_ieee=yes
+export gl_cv_func_trunc_ieee=yes
+export gl_cv_func_truncl_ieee=yes
+export gl_cv_func_tzset_clobber=no
+export gl_cv_func_ungetc_works=yes
+export gl_cv_func_unlink_honors_slashes=yes
+export gl_cv_func_unsetenv_works=yes
+export gl_cv_func_usleep_works=yes
+export gl_cv_func_utimensat_works=yes
+export gl_cv_func_vsnprintf_posix=yes
+export gl_cv_func_vsnprintf_zerosize_c99=yes
+export gl_cv_func_vsprintf_posix=yes
+export gl_cv_func_wcwidth_works=yes
+export gl_cv_func_working_getdelim=yes
+export gl_cv_func_working_mkstemp=yes
+export gl_cv_func_working_mktime=yes
+export gl_cv_func_working_strerror=yes
+export ac_cv_func___fseterr=yes
+export gl_cv_func_getcwd_null=yes
+export gl_cv_struct_dirent_d_ino=yes
+export ac_cv_func_strnlen_working=yes