diff --git a/lib-src/libnyquist/autotools/m4/ax_cflags_strict_prototypes.m4 b/lib-src/libnyquist/autotools/m4/ax_cflags_strict_prototypes.m4
deleted file mode 100644
index dda68b595..000000000
--- a/lib-src/libnyquist/autotools/m4/ax_cflags_strict_prototypes.m4
+++ /dev/null
@@ -1,173 +0,0 @@
-##### http://autoconf-archive.cryp.to/ax_cflags_strict_prototypes.html
-#
-# SYNOPSIS
-#
-#   AX_CFLAGS_STRICT_PROTOTYPES [(shellvar [,default, [A/NA]]
-#
-# DESCRIPTION
-#
-#   Try to find a compiler option that requires strict prototypes.
-#
-#   The sanity check is done by looking at sys/signal.h which has a set
-#   of macro-definitions SIG_DFL and SIG_IGN that are cast to the local
-#   signal-handler type. If that signal-handler type is not fully
-#   qualified then the system headers are not seen as strictly
-#   prototype clean.
-#
-#   For the GNU CC compiler it will be -fstrict-prototypes
-#   -Wstrict-prototypes The result is added to the shellvar being
-#   CFLAGS by default.
-#
-#   DEFAULTS:
-#
-#    - $1 shell-variable-to-add-to : CFLAGS
-#    - $2 add-value-if-not-found : nothing
-#    - $3 action-if-found : add value to shellvariable
-#    - $4 action-if-not-found : nothing
-#
-# LAST MODIFICATION
-#
-#   2006-12-12
-#
-# COPYLEFT
-#
-#   Copyright (c) 2006 Guido U. Draheim <guidod@gmx.de>
-#
-#   This program is free software; you can redistribute it and/or
-#   modify it under the terms of the GNU General Public License as
-#   published by the Free Software Foundation; either version 2 of the
-#   License, or (at your option) any later version.
-#
-#   This program is distributed in the hope that it will be useful, but
-#   WITHOUT ANY WARRANTY; without even the implied warranty of
-#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-#   General Public License for more details.
-#
-#   You should have received a copy of the GNU General Public License
-#   along with this program; if not, write to the Free Software
-#   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
-#   02111-1307, USA.
-#
-#   As a special exception, the respective Autoconf Macro's copyright
-#   owner gives unlimited permission to copy, distribute and modify the
-#   configure scripts that are the output of Autoconf when processing
-#   the Macro. You need not follow the terms of the GNU General Public
-#   License when using or distributing such scripts, even though
-#   portions of the text of the Macro appear in them. The GNU General
-#   Public License (GPL) does govern all other use of the material that
-#   constitutes the Autoconf Macro.
-#
-#   This special exception to the GPL applies to versions of the
-#   Autoconf Macro released by the Autoconf Macro Archive. When you
-#   make and distribute a modified version of the Autoconf Macro, you
-#   may extend this special exception to the GPL to apply to your
-#   modified version as well.
-
-AC_DEFUN([AX_CFLAGS_STRICT_PROTOTYPES],[dnl
-AS_VAR_PUSHDEF([FLAGS],[CFLAGS])dnl
-AS_VAR_PUSHDEF([VAR],[ac_cv_cflags_strict_prototypes])dnl
-AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for strict prototypes],
-VAR,[VAR="no, unknown"
- AC_LANG_SAVE
- AC_LANG_C
- ac_save_[]FLAGS="$[]FLAGS"
-for ac_arg dnl
-in "-pedantic % -fstrict-prototypes -Wstrict-prototypes" dnl   GCC
-   "-pedantic % -Wstrict-prototypes" dnl try to warn atleast
-   "-pedantic % -Wmissing-prototypes" dnl or another warning
-   "-pedantic % -Werror-implicit-function-declaration" dnl
-   "-pedantic % -Wimplicit-function-declaration" dnl
-   #
-do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
-   AC_TRY_COMPILE([],[return 0;],
-   [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
-done
-case ".$VAR" in
-   .|.no|.no,*) ;;
-   *) # sanity check with signal() from sys/signal.h
-    cp config.log config.tmp
-    AC_TRY_COMPILE([#include <signal.h>],[
-    if (signal (SIGINT, SIG_IGN) == SIG_DFL) return 1;
-    if (signal (SIGINT, SIG_IGN) != SIG_DFL) return 2;],
-    dnl the original did use test -n `$CC testprogram.c`
-    [if test `diff config.log config.tmp | grep -i warning | wc -l` != 0
-then if test `diff config.log config.tmp | grep -i warning | wc -l` != 1
-then VAR="no, suppressed, signal.h," ; fi ; fi],
-    [VAR="no, suppressed, signal.h"])
-    rm config.tmp
-  ;;
-esac
- FLAGS="$ac_save_[]FLAGS"
- AC_LANG_RESTORE
-])
-case ".$VAR" in
-     .ok|.ok,*) m4_ifvaln($3,$3) ;;
-   .|.no|.no,*) m4_ifvaln($4,$4,[m4_ifval($2,[
-        AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])
-                      m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])]) ;;
-   *) m4_ifvaln($3,$3,[
-   if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " $VAR " 2>&1 >/dev/null
-   then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain $VAR])
-   else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"])
-                      m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"
-   fi ]) ;;
-esac
-AS_VAR_POPDEF([VAR])dnl
-AS_VAR_POPDEF([FLAGS])dnl
-])
-
-dnl the only difference - the LANG selection... and the default FLAGS
-
-AC_DEFUN([AX_CXXFLAGS_STRICT_PROTOTYPES],[dnl
-AS_VAR_PUSHDEF([FLAGS],[CXXFLAGS])dnl
-AS_VAR_PUSHDEF([VAR],[ac_cv_cxxflags_strict_prototypes])dnl
-AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for strict prototypes],
-VAR,[VAR="no, unknown"
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_[]FLAGS="$[]FLAGS"
-for ac_arg dnl
-in "-pedantic -Werror % -fstrict-prototypes -Wstrict-prototypes" dnl   GCC
-   "-pedantic -Werror % -Wstrict-prototypes" dnl try to warn atleast
-   "-pedantic -Werror % -Wmissing-prototypes" dnl try to warn atleast
-   "-pedantic -Werror % -Werror-implicit-function-declaration" dnl
-   "-pedantic -Werror % -Wimplicit-function-declaration" dnl
-   "-pedantic % -Wstrict-prototypes %% no, unsupported in C++" dnl oops
-   #
-do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
-   AC_TRY_COMPILE([],[return 0;],
-   [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
-done
-case ".$VAR" in
-   .|.no|.no,*) ;;
-   *) # sanity check with signal() from sys/signal.h
-    cp config.log config.tmp
-    AC_TRY_COMPILE([#include <signal.h>],[
-    if (signal (SIGINT, SIG_IGN) == SIG_DFL) return 1;
-    if (signal (SIGINT, SIG_IGN) != SIG_DFL) return 2;],
-    dnl the original did use test -n `$CC testprogram.c`
-    [if test `diff config.log config.tmp | grep -i warning | wc -l` != 0
-then if test `diff config.log config.tmp | grep -i warning | wc -l` != 1
-then VAR="no, suppressed, signal.h," ; fi ; fi],
-    [VAR="no, suppressed, signal.h"])
-    rm config.tmp
-  ;;
-esac
- FLAGS="$ac_save_[]FLAGS"
- AC_LANG_RESTORE
-])
-case ".$VAR" in
-     .ok|.ok,*) m4_ifvaln($3,$3) ;;
-   .|.no|.no,*) m4_ifvaln($4,$4,[m4_ifval($2,[
-        AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])
-                      m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])]) ;;
-   *) m4_ifvaln($3,$3,[
-   if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " $VAR " 2>&1 >/dev/null
-   then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain $VAR])
-   else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"])
-                      m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"
-   fi ]) ;;
-esac
-AS_VAR_POPDEF([VAR])dnl
-AS_VAR_POPDEF([FLAGS])dnl
-])