diff --git a/Makefile.in b/Makefile.in
index 3d6a2d38..cfb207e1 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -259,7 +259,6 @@ ALLOCA = @ALLOCA@
 AMTAR = @AMTAR@
 AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
 AR = @AR@
-AS = @AS@
 AUTOCONF = @AUTOCONF@
 AUTOHEADER = @AUTOHEADER@
 AUTOMAKE = @AUTOMAKE@
diff --git a/build-aux/config.sub b/build-aux/config.sub
index 7f7d0b05..7384e919 100644
--- a/build-aux/config.sub
+++ b/build-aux/config.sub
@@ -2,7 +2,7 @@
 # Configuration validation subroutine script.
 #   Copyright 1992-2021 Free Software Foundation, Inc.
 
-timestamp='2021-03-10'
+timestamp='2021-04-30'
 
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@@ -1165,7 +1165,7 @@ case $cpu-$vendor in
 			| alphapca5[67] | alpha64pca5[67] \
 			| am33_2.0 \
 			| amdgcn \
-			| arc | arceb \
+			| arc | arceb | arc64 \
 			| arm | arm[lb]e | arme[lb] | armv* \
 			| avr | avr32 \
 			| asmjs \
@@ -1204,9 +1204,13 @@ case $cpu-$vendor in
 			| mips64vr5900 | mips64vr5900el \
 			| mipsisa32 | mipsisa32el \
 			| mipsisa32r2 | mipsisa32r2el \
+			| mipsisa32r3 | mipsisa32r3el \
+			| mipsisa32r5 | mipsisa32r5el \
 			| mipsisa32r6 | mipsisa32r6el \
 			| mipsisa64 | mipsisa64el \
 			| mipsisa64r2 | mipsisa64r2el \
+			| mipsisa64r3 | mipsisa64r3el \
+			| mipsisa64r5 | mipsisa64r5el \
 			| mipsisa64r6 | mipsisa64r6el \
 			| mipsisa64sb1 | mipsisa64sb1el \
 			| mipsisa64sr71k | mipsisa64sr71kel \
@@ -1707,7 +1711,7 @@ case $os in
 	     | nindy* | vxsim* | vxworks* | ebmon* | hms* | mvs* \
 	     | clix* | riscos* | uniplus* | iris* | isc* | rtu* | xenix* \
 	     | mirbsd* | netbsd* | dicos* | openedition* | ose* \
-	     | bitrig* | openbsd* | solidbsd* | libertybsd* | os108* \
+	     | bitrig* | openbsd* | secbsd* | solidbsd* | libertybsd* | os108* \
 	     | ekkobsd* | freebsd* | riscix* | lynxos* | os400* \
 	     | bosx* | nextstep* | cxux* | aout* | elf* | oabi* \
 	     | ptx* | coff* | ecoff* | winnt* | domain* | vsta* \
diff --git a/builds/Makefile.in b/builds/Makefile.in
index 2de582da..e7d00def 100644
--- a/builds/Makefile.in
+++ b/builds/Makefile.in
@@ -135,7 +135,6 @@ ALLOCA = @ALLOCA@
 AMTAR = @AMTAR@
 AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
 AR = @AR@
-AS = @AS@
 AUTOCONF = @AUTOCONF@
 AUTOHEADER = @AUTOHEADER@
 AUTOMAKE = @AUTOMAKE@
diff --git a/configure b/configure
index 309ebdb0..8945a1a2 100755
--- a/configure
+++ b/configure
@@ -665,7 +665,6 @@ LTLIBOBJS
 LIBOBJS
 HAVE_LD_OUTPUT_DEF_FALSE
 HAVE_LD_OUTPUT_DEF_TRUE
-AS
 WASI_FALSE
 WASI_TRUE
 EMSCRIPTEN_FALSE
@@ -737,10 +736,6 @@ EGREP
 GREP
 CPP
 SED
-target_os
-target_vendor
-target_cpu
-target
 SODIUM_LIBRARY_MINIMAL_DEF
 MINIMAL_FALSE
 MINIMAL_TRUE
@@ -799,6 +794,10 @@ am__isrc
 INSTALL_DATA
 INSTALL_SCRIPT
 INSTALL_PROGRAM
+target_os
+target_vendor
+target_cpu
+target
 host_os
 host_vendor
 host_cpu
@@ -2858,6 +2857,46 @@ IFS=$ac_save_IFS
 case $host_os in *\ *) host_os=`echo "$host_os" | sed 's/ /-/g'`;; esac
 
 
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking target system type" >&5
+printf %s "checking target system type... " >&6; }
+if test ${ac_cv_target+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "x$target_alias" = x; then
+  ac_cv_target=$ac_cv_host
+else
+  ac_cv_target=`$SHELL "${ac_aux_dir}config.sub" $target_alias` ||
+    as_fn_error $? "$SHELL ${ac_aux_dir}config.sub $target_alias failed" "$LINENO" 5
+fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_target" >&5
+printf "%s\n" "$ac_cv_target" >&6; }
+case $ac_cv_target in
+*-*-*) ;;
+*) as_fn_error $? "invalid value of canonical target" "$LINENO" 5;;
+esac
+target=$ac_cv_target
+ac_save_IFS=$IFS; IFS='-'
+set x $ac_cv_target
+shift
+target_cpu=$1
+target_vendor=$2
+shift; shift
+# Remember, the first character of IFS is used to create $*,
+# except with old shells:
+target_os=$*
+IFS=$ac_save_IFS
+case $target_os in *\ *) target_os=`echo "$target_os" | sed 's/ /-/g'`;; esac
+
+
+# The aliases save the names the user supplied, while $host etc.
+# will get canonicalized.
+test -n "$target_alias" &&
+  test "$program_prefix$program_suffix$program_transform_name" = \
+    NONENONEs,x,x, &&
+  program_prefix=${target_alias}-
 am__api_version='1.16'
 
 
@@ -3705,50 +3744,6 @@ fi
 
 
 
-DEPDIR="${am__leading_dot}deps"
-
-ac_config_commands="$ac_config_commands depfiles"
-
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether ${MAKE-make} supports the include directive" >&5
-printf %s "checking whether ${MAKE-make} supports the include directive... " >&6; }
-cat > confinc.mk << 'END'
-am__doit:
-	@echo this is the am__doit target >confinc.out
-.PHONY: am__doit
-END
-am__include="#"
-am__quote=
-# BSD make does it like this.
-echo '.include "confinc.mk" # ignored' > confmf.BSD
-# Other make implementations (GNU, Solaris 10, AIX) do it like this.
-echo 'include confinc.mk # ignored' > confmf.GNU
-_am_result=no
-for s in GNU BSD; do
-  { echo "$as_me:$LINENO: ${MAKE-make} -f confmf.$s && cat confinc.out" >&5
-   (${MAKE-make} -f confmf.$s && cat confinc.out) >&5 2>&5
-   ac_status=$?
-   echo "$as_me:$LINENO: \$? = $ac_status" >&5
-   (exit $ac_status); }
-  case $?:`cat confinc.out 2>/dev/null` in #(
-  '0:this is the am__doit target') :
-    case $s in #(
-  BSD) :
-    am__include='.include' am__quote='"' ;; #(
-  *) :
-    am__include='include' am__quote='' ;;
-esac ;; #(
-  *) :
-     ;;
-esac
-  if test "$am__include" != "#"; then
-    _am_result="yes ($s style)"
-    break
-  fi
-done
-rm -f confinc.* confmf.*
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: ${_am_result}" >&5
-printf "%s\n" "${_am_result}" >&6; }
-
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -4795,6 +4790,50 @@ ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
+DEPDIR="${am__leading_dot}deps"
+
+ac_config_commands="$ac_config_commands depfiles"
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether ${MAKE-make} supports the include directive" >&5
+printf %s "checking whether ${MAKE-make} supports the include directive... " >&6; }
+cat > confinc.mk << 'END'
+am__doit:
+	@echo this is the am__doit target >confinc.out
+.PHONY: am__doit
+END
+am__include="#"
+am__quote=
+# BSD make does it like this.
+echo '.include "confinc.mk" # ignored' > confmf.BSD
+# Other make implementations (GNU, Solaris 10, AIX) do it like this.
+echo 'include confinc.mk # ignored' > confmf.GNU
+_am_result=no
+for s in GNU BSD; do
+  { echo "$as_me:$LINENO: ${MAKE-make} -f confmf.$s && cat confinc.out" >&5
+   (${MAKE-make} -f confmf.$s && cat confinc.out) >&5 2>&5
+   ac_status=$?
+   echo "$as_me:$LINENO: \$? = $ac_status" >&5
+   (exit $ac_status); }
+  case $?:`cat confinc.out 2>/dev/null` in #(
+  '0:this is the am__doit target') :
+    case $s in #(
+  BSD) :
+    am__include='.include' am__quote='"' ;; #(
+  *) :
+    am__include='include' am__quote='' ;;
+esac ;; #(
+  *) :
+     ;;
+esac
+  if test "$am__include" != "#"; then
+    _am_result="yes ($s style)"
+    break
+  fi
+done
+rm -f confinc.* confmf.*
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: ${_am_result}" >&5
+printf "%s\n" "${_am_result}" >&6; }
+
 
 depcc="$CC"   am_compiler_list=
 
@@ -4925,7 +4964,6 @@ else
 fi
 
 
-
 # By default we simply use the C compiler to build assembly code.
 
 test "${CCAS+set}" = set || CCAS=$CC
@@ -5409,46 +5447,6 @@ else $as_nop
 fi
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking target system type" >&5
-printf %s "checking target system type... " >&6; }
-if test ${ac_cv_target+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  if test "x$target_alias" = x; then
-  ac_cv_target=$ac_cv_host
-else
-  ac_cv_target=`$SHELL "${ac_aux_dir}config.sub" $target_alias` ||
-    as_fn_error $? "$SHELL ${ac_aux_dir}config.sub $target_alias failed" "$LINENO" 5
-fi
-
-fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_target" >&5
-printf "%s\n" "$ac_cv_target" >&6; }
-case $ac_cv_target in
-*-*-*) ;;
-*) as_fn_error $? "invalid value of canonical target" "$LINENO" 5;;
-esac
-target=$ac_cv_target
-ac_save_IFS=$IFS; IFS='-'
-set x $ac_cv_target
-shift
-target_cpu=$1
-target_vendor=$2
-shift; shift
-# Remember, the first character of IFS is used to create $*,
-# except with old shells:
-target_os=$*
-IFS=$ac_save_IFS
-case $target_os in *\ *) target_os=`echo "$target_os" | sed 's/ /-/g'`;; esac
-
-
-# The aliases save the names the user supplied, while $host etc.
-# will get canonicalized.
-test -n "$target_alias" &&
-  test "$program_prefix$program_suffix$program_transform_name" = \
-    NONENONEs,x,x, &&
-  program_prefix=${target_alias}-
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a sed that does not truncate output" >&5
 printf %s "checking for a sed that does not truncate output... " >&6; }
 if test ${ac_cv_path_SED+y}
@@ -20414,17 +20412,38 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
+
+if test "x$WASI" = "x"
+then :
+
+  ac_fn_c_check_func "$LINENO" "getpid" "ac_cv_func_getpid"
+if test "x$ac_cv_func_getpid" = xyes
+then :
+  printf "%s\n" "#define HAVE_GETPID 1" >>confdefs.h
+
+fi
+
+  ac_fn_c_check_func "$LINENO" "getauxva" "ac_cv_func_getauxva"
+if test "x$ac_cv_func_getauxva" = xyes
+then :
+  printf "%s\n" "#define HAVE_GETAUXVA 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "elf_aux_info" "ac_cv_func_elf_aux_info"
+if test "x$ac_cv_func_elf_aux_info" = xyes
+then :
+  printf "%s\n" "#define HAVE_ELF_AUX_INFO 1" >>confdefs.h
+
+fi
+
+
+fi
+
 ac_fn_c_check_func "$LINENO" "posix_memalign" "ac_cv_func_posix_memalign"
 if test "x$ac_cv_func_posix_memalign" = xyes
 then :
   printf "%s\n" "#define HAVE_POSIX_MEMALIGN 1" >>confdefs.h
 
-fi
-ac_fn_c_check_func "$LINENO" "getpid" "ac_cv_func_getpid"
-if test "x$ac_cv_func_getpid" = xyes
-then :
-  printf "%s\n" "#define HAVE_GETPID 1" >>confdefs.h
-
 fi
 ac_fn_c_check_func "$LINENO" "nanosleep" "ac_cv_func_nanosleep"
 if test "x$ac_cv_func_nanosleep" = xyes
@@ -20487,333 +20506,6 @@ printf "%s\n" "#define CONFIGURED 1" >>confdefs.h
 
 
 
-enable_win32_dll=yes
-
-case $host in
-*-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-cegcc*)
-  if test -n "$ac_tool_prefix"; then
-  # Extract the first word of "${ac_tool_prefix}as", so it can be a program name with args.
-set dummy ${ac_tool_prefix}as; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-printf %s "checking for $ac_word... " >&6; }
-if test ${ac_cv_prog_AS+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$AS"; then
-  ac_cv_prog_AS="$AS" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  case $as_dir in #(((
-    '') as_dir=./ ;;
-    */) ;;
-    *) as_dir=$as_dir/ ;;
-  esac
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
-    ac_cv_prog_AS="${ac_tool_prefix}as"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-AS=$ac_cv_prog_AS
-if test -n "$AS"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $AS" >&5
-printf "%s\n" "$AS" >&6; }
-else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
-fi
-
-
-fi
-if test -z "$ac_cv_prog_AS"; then
-  ac_ct_AS=$AS
-  # Extract the first word of "as", so it can be a program name with args.
-set dummy as; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-printf %s "checking for $ac_word... " >&6; }
-if test ${ac_cv_prog_ac_ct_AS+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$ac_ct_AS"; then
-  ac_cv_prog_ac_ct_AS="$ac_ct_AS" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  case $as_dir in #(((
-    '') as_dir=./ ;;
-    */) ;;
-    *) as_dir=$as_dir/ ;;
-  esac
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
-    ac_cv_prog_ac_ct_AS="as"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-ac_ct_AS=$ac_cv_prog_ac_ct_AS
-if test -n "$ac_ct_AS"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AS" >&5
-printf "%s\n" "$ac_ct_AS" >&6; }
-else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
-fi
-
-  if test "x$ac_ct_AS" = x; then
-    AS="false"
-  else
-    case $cross_compiling:$ac_tool_warned in
-yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
-ac_tool_warned=yes ;;
-esac
-    AS=$ac_ct_AS
-  fi
-else
-  AS="$ac_cv_prog_AS"
-fi
-
-  if test -n "$ac_tool_prefix"; then
-  # Extract the first word of "${ac_tool_prefix}dlltool", so it can be a program name with args.
-set dummy ${ac_tool_prefix}dlltool; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-printf %s "checking for $ac_word... " >&6; }
-if test ${ac_cv_prog_DLLTOOL+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$DLLTOOL"; then
-  ac_cv_prog_DLLTOOL="$DLLTOOL" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  case $as_dir in #(((
-    '') as_dir=./ ;;
-    */) ;;
-    *) as_dir=$as_dir/ ;;
-  esac
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
-    ac_cv_prog_DLLTOOL="${ac_tool_prefix}dlltool"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-DLLTOOL=$ac_cv_prog_DLLTOOL
-if test -n "$DLLTOOL"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $DLLTOOL" >&5
-printf "%s\n" "$DLLTOOL" >&6; }
-else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
-fi
-
-
-fi
-if test -z "$ac_cv_prog_DLLTOOL"; then
-  ac_ct_DLLTOOL=$DLLTOOL
-  # Extract the first word of "dlltool", so it can be a program name with args.
-set dummy dlltool; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-printf %s "checking for $ac_word... " >&6; }
-if test ${ac_cv_prog_ac_ct_DLLTOOL+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$ac_ct_DLLTOOL"; then
-  ac_cv_prog_ac_ct_DLLTOOL="$ac_ct_DLLTOOL" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  case $as_dir in #(((
-    '') as_dir=./ ;;
-    */) ;;
-    *) as_dir=$as_dir/ ;;
-  esac
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
-    ac_cv_prog_ac_ct_DLLTOOL="dlltool"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-ac_ct_DLLTOOL=$ac_cv_prog_ac_ct_DLLTOOL
-if test -n "$ac_ct_DLLTOOL"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DLLTOOL" >&5
-printf "%s\n" "$ac_ct_DLLTOOL" >&6; }
-else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
-fi
-
-  if test "x$ac_ct_DLLTOOL" = x; then
-    DLLTOOL="false"
-  else
-    case $cross_compiling:$ac_tool_warned in
-yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
-ac_tool_warned=yes ;;
-esac
-    DLLTOOL=$ac_ct_DLLTOOL
-  fi
-else
-  DLLTOOL="$ac_cv_prog_DLLTOOL"
-fi
-
-  if test -n "$ac_tool_prefix"; then
-  # Extract the first word of "${ac_tool_prefix}objdump", so it can be a program name with args.
-set dummy ${ac_tool_prefix}objdump; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-printf %s "checking for $ac_word... " >&6; }
-if test ${ac_cv_prog_OBJDUMP+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$OBJDUMP"; then
-  ac_cv_prog_OBJDUMP="$OBJDUMP" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  case $as_dir in #(((
-    '') as_dir=./ ;;
-    */) ;;
-    *) as_dir=$as_dir/ ;;
-  esac
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
-    ac_cv_prog_OBJDUMP="${ac_tool_prefix}objdump"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-OBJDUMP=$ac_cv_prog_OBJDUMP
-if test -n "$OBJDUMP"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $OBJDUMP" >&5
-printf "%s\n" "$OBJDUMP" >&6; }
-else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
-fi
-
-
-fi
-if test -z "$ac_cv_prog_OBJDUMP"; then
-  ac_ct_OBJDUMP=$OBJDUMP
-  # Extract the first word of "objdump", so it can be a program name with args.
-set dummy objdump; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-printf %s "checking for $ac_word... " >&6; }
-if test ${ac_cv_prog_ac_ct_OBJDUMP+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$ac_ct_OBJDUMP"; then
-  ac_cv_prog_ac_ct_OBJDUMP="$ac_ct_OBJDUMP" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  case $as_dir in #(((
-    '') as_dir=./ ;;
-    */) ;;
-    *) as_dir=$as_dir/ ;;
-  esac
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
-    ac_cv_prog_ac_ct_OBJDUMP="objdump"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-ac_ct_OBJDUMP=$ac_cv_prog_ac_ct_OBJDUMP
-if test -n "$ac_ct_OBJDUMP"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OBJDUMP" >&5
-printf "%s\n" "$ac_ct_OBJDUMP" >&6; }
-else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
-fi
-
-  if test "x$ac_ct_OBJDUMP" = x; then
-    OBJDUMP="false"
-  else
-    case $cross_compiling:$ac_tool_warned in
-yes:)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
-ac_tool_warned=yes ;;
-esac
-    OBJDUMP=$ac_ct_OBJDUMP
-  fi
-else
-  OBJDUMP="$ac_cv_prog_OBJDUMP"
-fi
-
-  ;;
-esac
-
-test -z "$AS" && AS=as
-
-
-
-
-
-test -z "$DLLTOOL" && DLLTOOL=dlltool
-
-
-test -z "$OBJDUMP" && OBJDUMP=objdump
-
-
-
-
 
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if gcc/ld supports -Wl,--output-def" >&5
 printf %s "checking if gcc/ld supports -Wl,--output-def... " >&6; }
@@ -21785,7 +21477,6 @@ enable_dlopen_self='`$ECHO "$enable_dlopen_self" | $SED "$delay_single_quote_sub
 enable_dlopen_self_static='`$ECHO "$enable_dlopen_self_static" | $SED "$delay_single_quote_subst"`'
 old_striplib='`$ECHO "$old_striplib" | $SED "$delay_single_quote_subst"`'
 striplib='`$ECHO "$striplib" | $SED "$delay_single_quote_subst"`'
-AS='`$ECHO "$AS" | $SED "$delay_single_quote_subst"`'
 
 LTCC='$LTCC'
 LTCFLAGS='$LTCFLAGS'
@@ -21867,8 +21558,7 @@ soname_spec \
 install_override_mode \
 finish_eval \
 old_striplib \
-striplib \
-AS; do
+striplib; do
     case \`eval \\\\\$ECHO \\\\""\\\\\$\$var"\\\\"\` in
     *[\\\\\\\`\\"\\\$]*)
       eval "lt_\$var=\\\\\\"\\\`\\\$ECHO \\"\\\$\$var\\" | \\\$SED \\"\\\$sed_quote_subst\\"\\\`\\\\\\"" ## exclude from sc_prohibit_nested_quotes
@@ -22793,9 +22483,6 @@ dlopen_self_static=$enable_dlopen_self_static
 old_striplib=$lt_old_striplib
 striplib=$lt_striplib
 
-# Assembler program.
-AS=$lt_AS
-
 
 # The linker used to build libraries.
 LD=$lt_LD
diff --git a/configure.ac b/configure.ac
index c585b616..8a3f84db 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,12 +1,10 @@
-AC_PREREQ([2.65])
-AC_INIT([libsodium],[1.0.18],
-  [https://github.com/jedisct1/libsodium/issues],
-  [libsodium],
-  [https://github.com/jedisct1/libsodium])
+AC_PREREQ([2.71])
+AC_INIT([libsodium],[1.0.18],[https://github.com/jedisct1/libsodium/issues],[libsodium],[https://github.com/jedisct1/libsodium])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_SRCDIR([src/libsodium/sodium/version.c])
 AC_CANONICAL_HOST
+AC_CANONICAL_TARGET
 AM_INIT_AUTOMAKE([1.11 dist-bzip2 tar-ustar foreign subdir-objects])
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 AM_MAINTAINER_MODE
@@ -44,7 +42,7 @@ AS_IF([pwd | fgrep ' ' > /dev/null 2>&1],
   [AC_MSG_ERROR([The build directory contains whitespaces - This can cause tests/installation to fail due to limitations of some libtool versions])]
 )
 
-AC_PROG_CC_C99
+AC_PROG_CC
 AM_PROG_AS
 AC_USE_SYSTEM_EXTENSIONS
 
@@ -119,7 +117,7 @@ AC_ARG_ENABLE(minimal,
 AM_CONDITIONAL([MINIMAL], [test x$enable_minimal = xyes])
 AC_SUBST(SODIUM_LIBRARY_MINIMAL_DEF)
 
-AC_ARG_WITH(pthreads, AC_HELP_STRING([--with-pthreads],
+AC_ARG_WITH(pthreads, AS_HELP_STRING([--with-pthreads],
  [use pthreads library, or --without-pthreads to disable threading support.]),
  [ ], [withval="yes"])
 
@@ -260,7 +258,7 @@ int main(void) { return 0; }
 LIBTOOL_OLD_FLAGS="$LIBTOOL_EXTRA_FLAGS"
 LIBTOOL_EXTRA_FLAGS="$LIBTOOL_EXTRA_FLAGS -version-info $SODIUM_LIBRARY_VERSION"
 AC_ARG_ENABLE(soname-versions,
-  [AC_HELP_STRING([--enable-soname-versions], [enable soname versions (must be disabled for Android) (default: enabled)])],
+  [AS_HELP_STRING([--enable-soname-versions], [enable soname versions (must be disabled for Android) (default: enabled)])],
     [
         AS_IF([test "x$enableval" = "xno"], [
           LIBTOOL_EXTRA_FLAGS="$LIBTOOL_OLD_FLAGS -avoid-version"
@@ -883,8 +881,7 @@ AC_DEFINE([CONFIGURED], [1], [the build system was properly configured])
 
 dnl Libtool.
 
-LT_INIT([dlopen])
-AC_LIBTOOL_WIN32_DLL
+LT_INIT([dlopen win32-dll])
 gl_LD_OUTPUT_DEF
 
 dnl Output.
diff --git a/contrib/Makefile.in b/contrib/Makefile.in
index 49cf975d..5e34e97f 100644
--- a/contrib/Makefile.in
+++ b/contrib/Makefile.in
@@ -135,7 +135,6 @@ ALLOCA = @ALLOCA@
 AMTAR = @AMTAR@
 AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
 AR = @AR@
-AS = @AS@
 AUTOCONF = @AUTOCONF@
 AUTOHEADER = @AUTOHEADER@
 AUTOMAKE = @AUTOMAKE@
diff --git a/dist-build/Makefile.in b/dist-build/Makefile.in
index 6bb25ea3..c0b1fe09 100644
--- a/dist-build/Makefile.in
+++ b/dist-build/Makefile.in
@@ -135,7 +135,6 @@ ALLOCA = @ALLOCA@
 AMTAR = @AMTAR@
 AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
 AR = @AR@
-AS = @AS@
 AUTOCONF = @AUTOCONF@
 AUTOHEADER = @AUTOHEADER@
 AUTOMAKE = @AUTOMAKE@
diff --git a/msvc-scripts/Makefile.in b/msvc-scripts/Makefile.in
index 4397ceb6..737d3278 100644
--- a/msvc-scripts/Makefile.in
+++ b/msvc-scripts/Makefile.in
@@ -135,7 +135,6 @@ ALLOCA = @ALLOCA@
 AMTAR = @AMTAR@
 AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
 AR = @AR@
-AS = @AS@
 AUTOCONF = @AUTOCONF@
 AUTOHEADER = @AUTOHEADER@
 AUTOMAKE = @AUTOMAKE@
diff --git a/src/Makefile.in b/src/Makefile.in
index 149bd5f6..c204ab90 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -195,7 +195,6 @@ ALLOCA = @ALLOCA@
 AMTAR = @AMTAR@
 AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
 AR = @AR@
-AS = @AS@
 AUTOCONF = @AUTOCONF@
 AUTOHEADER = @AUTOHEADER@
 AUTOMAKE = @AUTOMAKE@
diff --git a/src/libsodium/Makefile.in b/src/libsodium/Makefile.in
index cb43cc59..bdab74a7 100644
--- a/src/libsodium/Makefile.in
+++ b/src/libsodium/Makefile.in
@@ -752,7 +752,6 @@ ALLOCA = @ALLOCA@
 AMTAR = @AMTAR@
 AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
 AR = @AR@
-AS = @AS@
 AUTOCONF = @AUTOCONF@
 AUTOHEADER = @AUTOHEADER@
 AUTOMAKE = @AUTOMAKE@
diff --git a/src/libsodium/include/Makefile.in b/src/libsodium/include/Makefile.in
index cc05d6a1..ca674784 100644
--- a/src/libsodium/include/Makefile.in
+++ b/src/libsodium/include/Makefile.in
@@ -184,7 +184,6 @@ ALLOCA = @ALLOCA@
 AMTAR = @AMTAR@
 AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
 AR = @AR@
-AS = @AS@
 AUTOCONF = @AUTOCONF@
 AUTOHEADER = @AUTOHEADER@
 AUTOMAKE = @AUTOMAKE@
diff --git a/test/Makefile.in b/test/Makefile.in
index a6f2301c..6a3a90d1 100644
--- a/test/Makefile.in
+++ b/test/Makefile.in
@@ -195,7 +195,6 @@ ALLOCA = @ALLOCA@
 AMTAR = @AMTAR@
 AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
 AR = @AR@
-AS = @AS@
 AUTOCONF = @AUTOCONF@
 AUTOHEADER = @AUTOHEADER@
 AUTOMAKE = @AUTOMAKE@
diff --git a/test/default/Makefile.in b/test/default/Makefile.in
index 63c8e959..4ca0b1b4 100644
--- a/test/default/Makefile.in
+++ b/test/default/Makefile.in
@@ -739,7 +739,6 @@ ALLOCA = @ALLOCA@
 AMTAR = @AMTAR@
 AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
 AR = @AR@
-AS = @AS@
 AUTOCONF = @AUTOCONF@
 AUTOHEADER = @AUTOHEADER@
 AUTOMAKE = @AUTOMAKE@