refresh default build system from Debian

Create a default configure in Debian

20 files changed, 514 insertions, 228 deletions

diff --git a/Makefile.in b/Makefile.in
index 9a102fb..4f88c8e 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -96,11 +96,11 @@ host_triplet = @host@
 @COND_THREADED_TRUE@am__append_2 = plugins/threaded
 subdir = .
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/acx_pthread.m4 \
-	$(top_srcdir)/m4/ax_append_compile_flags.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_append_compile_flags.m4 \
 	$(top_srcdir)/m4/ax_append_flag.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
 	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 \
 	$(top_srcdir)/m4/ax_require_defined.m4 \
 	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
 	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
@@ -342,12 +342,12 @@ ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-acx_pthread_config = @acx_pthread_config@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
 am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
+ax_pthread_config = @ax_pthread_config@
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@
diff --git a/aclocal.m4 b/aclocal.m4
index 5620761..2b0d9cf 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -1166,11 +1166,11 @@ AC_SUBST([am__tar])
 AC_SUBST([am__untar])
 ]) # _AM_PROG_TAR
 
-m4_include([m4/acx_pthread.m4])
 m4_include([m4/ax_append_compile_flags.m4])
 m4_include([m4/ax_append_flag.m4])
 m4_include([m4/ax_check_compile_flag.m4])
 m4_include([m4/ax_gcc_func_attribute.m4])
+m4_include([m4/ax_pthread.m4])
 m4_include([m4/ax_require_defined.m4])
 m4_include([m4/libtool.m4])
 m4_include([m4/ltoptions.m4])
diff --git a/configure b/configure
index 9143bb9..0977568 100755
--- a/configure
+++ b/configure
@@ -655,7 +655,7 @@ PTHREAD_CFLAGS
 PTHREAD_LIBS
 PTHREAD_CXX
 PTHREAD_CC
-acx_pthread_config
+ax_pthread_config
 inline
 MAINT
 MAINTAINER_MODE_FALSE
@@ -16725,6 +16725,8 @@ else
 
                     int foo_def( void ) __attribute__((visibility("default")));
                     int foo_hid( void ) __attribute__((visibility("hidden")));
+                    int foo_int( void ) __attribute__((visibility("internal")));
+                    int foo_pro( void ) __attribute__((visibility("protected")));
 
 int
 main ()
@@ -16736,7 +16738,7 @@ main ()
 
 _ACEOF
 if ac_fn_c_try_link "$LINENO"; then :
-                                      if test -s conftest.err; then :
+                                      if grep -- -Wattributes conftest.err; then :
   ax_cv_have_func_attribute_visibility=no
 else
   ax_cv_have_func_attribute_visibility=yes
@@ -17226,28 +17228,36 @@ then
 
 
 
+
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$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
 
-acx_pthread_ok=no
+ax_pthread_ok=no
 
 # We used to check for pthread.h first, but this fails if pthread.h
-# requires special compiler flags (e.g. on True64 or Sequent).
+# requires special compiler flags (e.g. on Tru64 or Sequent).
 # It gets checked for in the link test anyway.
 
 # First of all, check if the user has set any of the PTHREAD_LIBS,
 # etcetera environment variables, and if threads linking works using
 # them:
-if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
-        save_CFLAGS="$CFLAGS"
+if test "x$PTHREAD_CFLAGS$PTHREAD_LIBS" != "x"; then
+        ax_pthread_save_CC="$CC"
+        ax_pthread_save_CFLAGS="$CFLAGS"
+        ax_pthread_save_LIBS="$LIBS"
+        if test "x$PTHREAD_CC" != "x"; then :
+  CC="$PTHREAD_CC"
+fi
+        if test "x$PTHREAD_CXX" != "x"; then :
+  CXX="$PTHREAD_CXX"
+fi
         CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
-        save_LIBS="$LIBS"
         LIBS="$PTHREAD_LIBS $LIBS"
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS" >&5
-$as_echo_n "checking for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS" >&5
+$as_echo_n "checking for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS... " >&6; }
         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -17267,18 +17277,19 @@ return pthread_join ();
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"; then :
-  acx_pthread_ok=yes
+  ax_pthread_ok=yes
 fi
 rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext conftest.$ac_ext
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $acx_pthread_ok" >&5
-$as_echo "$acx_pthread_ok" >&6; }
-        if test x"$acx_pthread_ok" = xno; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_pthread_ok" >&5
+$as_echo "$ax_pthread_ok" >&6; }
+        if test "x$ax_pthread_ok" = "xno"; then
                 PTHREAD_LIBS=""
                 PTHREAD_CFLAGS=""
         fi
-        LIBS="$save_LIBS"
-        CFLAGS="$save_CFLAGS"
+        CC="$ax_pthread_save_CC"
+        CFLAGS="$ax_pthread_save_CFLAGS"
+        LIBS="$ax_pthread_save_LIBS"
 fi
 
 # We must check for the threads library under a number of different
@@ -17286,12 +17297,14 @@ fi
 # (e.g. DEC) have both -lpthread and -lpthreads, where one of the
 # libraries is broken (non-POSIX).
 
-# Create a list of thread flags to try.  Items starting with a "-" are
-# C compiler flags, and other items are library names, except for "none"
-# which indicates that we try without any flags at all, and "pthread-config"
-# which is a program returning the flags for the Pth emulation library.
+# Create a list of thread flags to try. Items with a "," contain both
+# C compiler flags (before ",") and linker flags (after ","). Other items
+# starting with a "-" are C compiler flags, and remaining items are
+# library names, except for "none" which indicates that we try without
+# any flags at all, and "pthread-config" which is a program returning
+# the flags for the Pth emulation library.
 
-acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt lpthread pthread-config"
+ax_pthread_flags="pthreads none -Kthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
 
 # The ordering *is* (sometimes) important.  Some notes on the
 # individual items follow:
@@ -17300,65 +17313,184 @@ acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -m
 # none: in case threads are in libc; should be tried before -Kthread and
 #       other compiler flags to prevent continual compiler warnings
 # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
-# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
-# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
-# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)
-# -pthreads: Solaris/gcc
-# -mthreads: Mingw32/gcc, Lynx/gcc
+# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64
+#           (Note: HP C rejects this with "bad form for `-t' option")
+# -pthreads: Solaris/gcc (Note: HP C also rejects)
 # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
-#      doesn't hurt to check since this sometimes defines pthreads too;
-#      also defines -D_REENTRANT)
-#      ... -mt is also the pthreads flag for HP/aCC
+#      doesn't hurt to check since this sometimes defines pthreads and
+#      -D_REENTRANT too), HP C (must be checked before -lpthread, which
+#      is present but should not be used directly; and before -mthreads,
+#      because the compiler interprets this as "-mt" + "-hreads")
+# -mthreads: Mingw32/gcc, Lynx/gcc
 # pthread: Linux, etcetera
 # --thread-safe: KAI C++
 # pthread-config: use pthread-config program (for GNU Pth library)
 
-case "${host_cpu}-${host_os}" in
-        *solaris*)
+case $host_os in
+
+        freebsd*)
+
+        # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
+        # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
+
+        ax_pthread_flags="-kthread lthread $ax_pthread_flags"
+        ;;
+
+        hpux*)
+
+        # From the cc(1) man page: "[-mt] Sets various -D flags to enable
+        # multi-threading and also sets -lpthread."
+
+        ax_pthread_flags="-mt -pthread pthread $ax_pthread_flags"
+        ;;
+
+        openedition*)
+
+        # IBM z/OS requires a feature-test macro to be defined in order to
+        # enable POSIX threads at all, so give the user a hint if this is
+        # not set. (We don't define these ourselves, as they can affect
+        # other portions of the system API in unpredictable ways.)
+
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#            if !defined(_OPEN_THREADS) && !defined(_UNIX03_THREADS)
+             AX_PTHREAD_ZOS_MISSING
+#            endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "AX_PTHREAD_ZOS_MISSING" >/dev/null 2>&1; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support." >&5
+$as_echo "$as_me: WARNING: IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support." >&2;}
+fi
+rm -f conftest*
+
+        ;;
+
+        solaris*)
 
         # On Solaris (at least, for some versions), libc contains stubbed
         # (non-functional) versions of the pthreads routines, so link-based
-        # tests will erroneously succeed.  (We need to link with -pthreads/-mt/
-        # -lpthread.)  (The stubs are missing pthread_cleanup_push, or rather
-        # a function called by this macro, so we could check for that, but
-        # who knows whether they'll stub that too in a future libc.)  So,
-        # we'll just look for -pthreads and -lpthread first:
+        # tests will erroneously succeed. (N.B.: The stubs are missing
+        # pthread_cleanup_push, or rather a function called by this macro,
+        # so we could check for that, but who knows whether they'll stub
+        # that too in a future libc.)  So we'll check first for the
+        # standard Solaris way of linking pthreads (-mt -lpthread).
+
+        ax_pthread_flags="-mt,-lpthread pthread $ax_pthread_flags"
+        ;;
+esac
+
+# Are we compiling with Clang?
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC is Clang" >&5
+$as_echo_n "checking whether $CC is Clang... " >&6; }
+if ${ax_cv_PTHREAD_CLANG+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ax_cv_PTHREAD_CLANG=no
+     # Note that Autoconf sets GCC=yes for Clang as well as GCC
+     if test "x$GCC" = "xyes"; then
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+/* Note: Clang 2.7 lacks __clang_[a-z]+__ */
+#            if defined(__clang__) && defined(__llvm__)
+             AX_PTHREAD_CC_IS_CLANG
+#            endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "AX_PTHREAD_CC_IS_CLANG" >/dev/null 2>&1; then :
+  ax_cv_PTHREAD_CLANG=yes
+fi
+rm -f conftest*
+
+     fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_CLANG" >&5
+$as_echo "$ax_cv_PTHREAD_CLANG" >&6; }
+ax_pthread_clang="$ax_cv_PTHREAD_CLANG"
+
+
+# GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC)
+
+# Note that for GCC and Clang -pthread generally implies -lpthread,
+# except when -nostdlib is passed.
+# This is problematic using libtool to build C++ shared libraries with pthread:
+# [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25460
+# [2] https://bugzilla.redhat.com/show_bug.cgi?id=661333
+# [3] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=468555
+# To solve this, first try -pthread together with -lpthread for GCC
 
-        acx_pthread_flags="-pthreads pthread -mt -pthread $acx_pthread_flags"
+if test "x$GCC" = "xyes"; then :
+  ax_pthread_flags="-pthread,-lpthread -pthread -pthreads $ax_pthread_flags"
+fi
+
+# Clang takes -pthread (never supported any other flag), but we'll try with -lpthread first
+
+if test "x$ax_pthread_clang" = "xyes"; then :
+  ax_pthread_flags="-pthread,-lpthread -pthread"
+fi
+
+
+# The presence of a feature test macro requesting re-entrant function
+# definitions is, on some systems, a strong hint that pthreads support is
+# correctly enabled
+
+case $host_os in
+        darwin* | hpux* | linux* | osf* | solaris*)
+        ax_pthread_check_macro="_REENTRANT"
+        ;;
+
+        aix*)
+        ax_pthread_check_macro="_THREAD_SAFE"
         ;;
 
-        # The HP-UX compiler just warns about options it does not understand
-        # but it needs -mt.
-        *-hpux*)
-        acx_pthread_flags="-mt $acx_pthread_flags"
+        *)
+        ax_pthread_check_macro="--"
         ;;
 esac
+if test "x$ax_pthread_check_macro" = "x--"; then :
+  ax_pthread_check_cond=0
+else
+  ax_pthread_check_cond="!defined($ax_pthread_check_macro)"
+fi
 
-if test x"$acx_pthread_ok" = xno; then
-for flag in $acx_pthread_flags; do
 
-        case $flag in
+if test "x$ax_pthread_ok" = "xno"; then
+for ax_pthread_try_flag in $ax_pthread_flags; do
+
+        case $ax_pthread_try_flag in
                 none)
                 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether pthreads work without any flags" >&5
 $as_echo_n "checking whether pthreads work without any flags... " >&6; }
                 ;;
 
+                *,*)
+                PTHREAD_CFLAGS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\1/"`
+                PTHREAD_LIBS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\2/"`
+                { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether pthreads work with \"$PTHREAD_CFLAGS\" and \"$PTHREAD_LIBS\"" >&5
+$as_echo_n "checking whether pthreads work with \"$PTHREAD_CFLAGS\" and \"$PTHREAD_LIBS\"... " >&6; }
+                ;;
+
                 -*)
-                { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether pthreads work with $flag" >&5
-$as_echo_n "checking whether pthreads work with $flag... " >&6; }
-                PTHREAD_CFLAGS="$flag"
+                { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether pthreads work with $ax_pthread_try_flag" >&5
+$as_echo_n "checking whether pthreads work with $ax_pthread_try_flag... " >&6; }
+                PTHREAD_CFLAGS="$ax_pthread_try_flag"
                 ;;
 
-		pthread-config)
-		# Extract the first word of "pthread-config", so it can be a program name with args.
+                pthread-config)
+                # Extract the first word of "pthread-config", so it can be a program name with args.
 set dummy pthread-config; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_acx_pthread_config+:} false; then :
+if ${ac_cv_prog_ax_pthread_config+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if test -n "$acx_pthread_config"; then
-  ac_cv_prog_acx_pthread_config="$acx_pthread_config" # Let the user override the test.
+  if test -n "$ax_pthread_config"; then
+  ac_cv_prog_ax_pthread_config="$ax_pthread_config" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
@@ -17367,7 +17499,7 @@ do
   test -z "$as_dir" && as_dir=.
     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_acx_pthread_config="yes"
+    ac_cv_prog_ax_pthread_config="yes"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -17375,35 +17507,37 @@ done
   done
 IFS=$as_save_IFS
 
-  test -z "$ac_cv_prog_acx_pthread_config" && ac_cv_prog_acx_pthread_config="no"
+  test -z "$ac_cv_prog_ax_pthread_config" && ac_cv_prog_ax_pthread_config="no"
 fi
 fi
-acx_pthread_config=$ac_cv_prog_acx_pthread_config
-if test -n "$acx_pthread_config"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $acx_pthread_config" >&5
-$as_echo "$acx_pthread_config" >&6; }
+ax_pthread_config=$ac_cv_prog_ax_pthread_config
+if test -n "$ax_pthread_config"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_pthread_config" >&5
+$as_echo "$ax_pthread_config" >&6; }
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
 
-		if test x"$acx_pthread_config" = xno; then continue; fi
-		PTHREAD_CFLAGS="`pthread-config --cflags`"
-		PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
-		;;
+                if test "x$ax_pthread_config" = "xno"; then :
+  continue
+fi
+                PTHREAD_CFLAGS="`pthread-config --cflags`"
+                PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
+                ;;
 
                 *)
-                { $as_echo "$as_me:${as_lineno-$LINENO}: checking for the pthreads library -l$flag" >&5
-$as_echo_n "checking for the pthreads library -l$flag... " >&6; }
-                PTHREAD_LIBS="-l$flag"
+                { $as_echo "$as_me:${as_lineno-$LINENO}: checking for the pthreads library -l$ax_pthread_try_flag" >&5
+$as_echo_n "checking for the pthreads library -l$ax_pthread_try_flag... " >&6; }
+                PTHREAD_LIBS="-l$ax_pthread_try_flag"
                 ;;
         esac
 
-        save_LIBS="$LIBS"
-        save_CFLAGS="$CFLAGS"
-        LIBS="$PTHREAD_LIBS $LIBS"
+        ax_pthread_save_CFLAGS="$CFLAGS"
+        ax_pthread_save_LIBS="$LIBS"
         CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+        LIBS="$PTHREAD_LIBS $LIBS"
 
         # Check for various functions.  We must include pthread.h,
         # since some functions may be macros.  (On the Sequent, we
@@ -17414,141 +17548,286 @@ $as_echo_n "checking for the pthreads library -l$flag... " >&6; }
         # pthread_cleanup_push because it is one of the few pthread
         # functions on Solaris that doesn't have a non-functional libc stub.
         # We try pthread_create on general principles.
+
         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <pthread.h>
+#                       if $ax_pthread_check_cond
+#                        error "$ax_pthread_check_macro must be defined"
+#                       endif
+                        static void *some_global = NULL;
+                        static void routine(void *a)
+                          {
+                             /* To avoid any unused-parameter or
+                                unused-but-set-parameter warning.  */
+                             some_global = a;
+                          }
+                        static void *start_routine(void *a) { return a; }
 int
 main ()
 {
-pthread_t th; pthread_join(th, 0);
-                     pthread_attr_init(0); pthread_cleanup_push(0, 0);
-                     pthread_create(0,0,0,0); pthread_cleanup_pop(0);
+pthread_t th; pthread_attr_t attr;
+                        pthread_create(&th, 0, start_routine, 0);
+                        pthread_join(th, 0);
+                        pthread_attr_init(&attr);
+                        pthread_cleanup_push(routine, 0);
+                        pthread_cleanup_pop(0) /* ; */
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"; then :
-  acx_pthread_ok=yes
+  ax_pthread_ok=yes
 fi
 rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext conftest.$ac_ext
 
-        LIBS="$save_LIBS"
-        CFLAGS="$save_CFLAGS"
+        CFLAGS="$ax_pthread_save_CFLAGS"
+        LIBS="$ax_pthread_save_LIBS"
 
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $acx_pthread_ok" >&5
-$as_echo "$acx_pthread_ok" >&6; }
-        if test "x$acx_pthread_ok" = xyes; then
-                break;
-        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_pthread_ok" >&5
+$as_echo "$ax_pthread_ok" >&6; }
+        if test "x$ax_pthread_ok" = "xyes"; then :
+  break
+fi
 
         PTHREAD_LIBS=""
         PTHREAD_CFLAGS=""
 done
 fi
 
+
+# Clang needs special handling, because older versions handle the -pthread
+# option in a rather... idiosyncratic way
+
+if test "x$ax_pthread_clang" = "xyes"; then
+
+        # Clang takes -pthread; it has never supported any other flag
+
+        # (Note 1: This will need to be revisited if a system that Clang
+        # supports has POSIX threads in a separate library.  This tends not
+        # to be the way of modern systems, but it's conceivable.)
+
+        # (Note 2: On some systems, notably Darwin, -pthread is not needed
+        # to get POSIX threads support; the API is always present and
+        # active.  We could reasonably leave PTHREAD_CFLAGS empty.  But
+        # -pthread does define _REENTRANT, and while the Darwin headers
+        # ignore this macro, third-party headers might not.)
+
+        # However, older versions of Clang make a point of warning the user
+        # that, in an invocation where only linking and no compilation is
+        # taking place, the -pthread option has no effect ("argument unused
+        # during compilation").  They expect -pthread to be passed in only
+        # when source code is being compiled.
+        #
+        # Problem is, this is at odds with the way Automake and most other
+        # C build frameworks function, which is that the same flags used in
+        # compilation (CFLAGS) are also used in linking.  Many systems
+        # supported by AX_PTHREAD require exactly this for POSIX threads
+        # support, and in fact it is often not straightforward to specify a
+        # flag that is used only in the compilation phase and not in
+        # linking.  Such a scenario is extremely rare in practice.
+        #
+        # Even though use of the -pthread flag in linking would only print
+        # a warning, this can be a nuisance for well-run software projects
+        # that build with -Werror.  So if the active version of Clang has
+        # this misfeature, we search for an option to squash it.
+
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether Clang needs flag to prevent \"argument unused\" warning when linking with -pthread" >&5
+$as_echo_n "checking whether Clang needs flag to prevent \"argument unused\" warning when linking with -pthread... " >&6; }
+if ${ax_cv_PTHREAD_CLANG_NO_WARN_FLAG+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ax_cv_PTHREAD_CLANG_NO_WARN_FLAG=unknown
+             # Create an alternate version of $ac_link that compiles and
+             # links in two steps (.c -> .o, .o -> exe) instead of one
+             # (.c -> exe), because the warning occurs only in the second
+             # step
+             ax_pthread_save_ac_link="$ac_link"
+             ax_pthread_sed='s/conftest\.\$ac_ext/conftest.$ac_objext/g'
+             ax_pthread_link_step=`$as_echo "$ac_link" | sed "$ax_pthread_sed"`
+             ax_pthread_2step_ac_link="($ac_compile) && (echo ==== >&5) && ($ax_pthread_link_step)"
+             ax_pthread_save_CFLAGS="$CFLAGS"
+             for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do
+                if test "x$ax_pthread_try" = "xunknown"; then :
+  break
+fi
+                CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS"
+                ac_link="$ax_pthread_save_ac_link"
+                cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+int main(void){return 0;}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_link="$ax_pthread_2step_ac_link"
+                     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+int main(void){return 0;}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  break
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+             done
+             ac_link="$ax_pthread_save_ac_link"
+             CFLAGS="$ax_pthread_save_CFLAGS"
+             if test "x$ax_pthread_try" = "x"; then :
+  ax_pthread_try=no
+fi
+             ax_cv_PTHREAD_CLANG_NO_WARN_FLAG="$ax_pthread_try"
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" >&5
+$as_echo "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" >&6; }
+
+        case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in
+                no | unknown) ;;
+                *) PTHREAD_CFLAGS="$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG $PTHREAD_CFLAGS" ;;
+        esac
+
+fi # $ax_pthread_clang = yes
+
+
+
 # Various other checks:
-if test "x$acx_pthread_ok" = xyes; then
-        save_LIBS="$LIBS"
-        LIBS="$PTHREAD_LIBS $LIBS"
-        save_CFLAGS="$CFLAGS"
+if test "x$ax_pthread_ok" = "xyes"; then
+        ax_pthread_save_CFLAGS="$CFLAGS"
+        ax_pthread_save_LIBS="$LIBS"
         CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+        LIBS="$PTHREAD_LIBS $LIBS"
 
         # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for joinable pthread attribute" >&5
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for joinable pthread attribute" >&5
 $as_echo_n "checking for joinable pthread attribute... " >&6; }
-	attr_name=unknown
-	for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
-	    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+if ${ax_cv_PTHREAD_JOINABLE_ATTR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ax_cv_PTHREAD_JOINABLE_ATTR=unknown
+             for ax_pthread_attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
+                 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <pthread.h>
 int
 main ()
 {
-int attr=$attr; return attr;
+int attr = $ax_pthread_attr; return attr /* ; */
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"; then :
-  attr_name=$attr; break
+  ax_cv_PTHREAD_JOINABLE_ATTR=$ax_pthread_attr; break
 fi
 rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext conftest.$ac_ext
-	done
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $attr_name" >&5
-$as_echo "$attr_name" >&6; }
-        if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then
+             done
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_JOINABLE_ATTR" >&5
+$as_echo "$ax_cv_PTHREAD_JOINABLE_ATTR" >&6; }
+        if test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \
+               test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \
+               test "x$ax_pthread_joinable_attr_defined" != "xyes"; then :
 
 cat >>confdefs.h <<_ACEOF
-#define PTHREAD_CREATE_JOINABLE $attr_name
+#define PTHREAD_CREATE_JOINABLE $ax_cv_PTHREAD_JOINABLE_ATTR
 _ACEOF
 
-        fi
+               ax_pthread_joinable_attr_defined=yes
 
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking if more special flags are required for pthreads" >&5
-$as_echo_n "checking if more special flags are required for pthreads... " >&6; }
-        flag=no
-        case "${host_cpu}-${host_os}" in
-            *-aix* | *-freebsd* | *-darwin*) flag="-D_THREAD_SAFE";;
-            *solaris* | *-osf* | *-hpux*) flag="-D_REENTRANT";;
-        esac
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: ${flag}" >&5
-$as_echo "${flag}" >&6; }
-        if test "x$flag" != xno; then
-            PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS"
-        fi
+fi
 
-        LIBS="$save_LIBS"
-        CFLAGS="$save_CFLAGS"
-
-        # More AIX lossage: must compile with xlc_r or cc_r
-        case "${host_os}" in
-          aix* )
-            if test x"$GCC" != xyes; then
-              case "$CC" in
-                *xlc )
-                  # Extract the first word of "xlc_r", so it can be a program name with args.
-set dummy xlc_r; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_PTHREAD_CC+:} false; then :
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether more special flags are required for pthreads" >&5
+$as_echo_n "checking whether more special flags are required for pthreads... " >&6; }
+if ${ax_cv_PTHREAD_SPECIAL_FLAGS+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if test -n "$PTHREAD_CC"; then
-  ac_cv_prog_PTHREAD_CC="$PTHREAD_CC" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    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_PTHREAD_CC="xlc_r"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
+  ax_cv_PTHREAD_SPECIAL_FLAGS=no
+             case $host_os in
+             solaris*)
+             ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS"
+             ;;
+             esac
 
-  test -z "$ac_cv_prog_PTHREAD_CC" && ac_cv_prog_PTHREAD_CC="${CC}"
 fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_SPECIAL_FLAGS" >&5
+$as_echo "$ax_cv_PTHREAD_SPECIAL_FLAGS" >&6; }
+        if test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \
+               test "x$ax_pthread_special_flags_added" != "xyes"; then :
+  PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS"
+               ax_pthread_special_flags_added=yes
 fi
-PTHREAD_CC=$ac_cv_prog_PTHREAD_CC
-if test -n "$PTHREAD_CC"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PTHREAD_CC" >&5
-$as_echo "$PTHREAD_CC" >&6; }
+
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for PTHREAD_PRIO_INHERIT" >&5
+$as_echo_n "checking for PTHREAD_PRIO_INHERIT... " >&6; }
+if ${ax_cv_PTHREAD_PRIO_INHERIT+:} false; then :
+  $as_echo_n "(cached) " >&6
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pthread.h>
+int
+main ()
+{
+int i = PTHREAD_PRIO_INHERIT;
+                                               return i;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ax_cv_PTHREAD_PRIO_INHERIT=yes
+else
+  ax_cv_PTHREAD_PRIO_INHERIT=no
 fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 
- ;;
-                *cc )
-                  # Extract the first word of "cc_r", so it can be a program name with args.
-set dummy cc_r; ac_word=$2
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_PRIO_INHERIT" >&5
+$as_echo "$ax_cv_PTHREAD_PRIO_INHERIT" >&6; }
+        if test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \
+               test "x$ax_pthread_prio_inherit_defined" != "xyes"; then :
+
+$as_echo "#define HAVE_PTHREAD_PRIO_INHERIT 1" >>confdefs.h
+
+               ax_pthread_prio_inherit_defined=yes
+
+fi
+
+        CFLAGS="$ax_pthread_save_CFLAGS"
+        LIBS="$ax_pthread_save_LIBS"
+
+        # More AIX lossage: compile with *_r variant
+        if test "x$GCC" != "xyes"; then
+            case $host_os in
+                aix*)
+                case "x/$CC" in #(
+  x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6) :
+    #handle absolute path differently from PATH based program lookup
+                     case "x$CC" in #(
+  x/*) :
+
+			   if as_fn_executable_p ${CC}_r; then :
+  PTHREAD_CC="${CC}_r"
+fi
+			   if test "x${CXX}" != "x"; then :
+  if as_fn_executable_p ${CXX}_r; then :
+  PTHREAD_CXX="${CXX}_r"
+fi
+fi
+			  ;; #(
+  *) :
+
+			   for ac_prog in ${CC}_r
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_prog_PTHREAD_CC+:} false; then :
@@ -17564,7 +17843,7 @@ do
   test -z "$as_dir" && as_dir=.
     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_PTHREAD_CC="cc_r"
+    ac_cv_prog_PTHREAD_CC="$ac_prog"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -17572,7 +17851,6 @@ done
   done
 IFS=$as_save_IFS
 
-  test -z "$ac_cv_prog_PTHREAD_CC" && ac_cv_prog_PTHREAD_CC="${CC}"
 fi
 fi
 PTHREAD_CC=$ac_cv_prog_PTHREAD_CC
@@ -17584,13 +17862,16 @@ else
 $as_echo "no" >&6; }
 fi
 
- ;;
-              esac
-            fi
-            case "$CXX" in
-              *xlC )
-                # Extract the first word of "xlC_r", so it can be a program name with args.
-set dummy xlC_r; ac_word=$2
+
+  test -n "$PTHREAD_CC" && break
+done
+test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
+
+			   if test "x${CXX}" != "x"; then :
+  for ac_prog in ${CXX}_r
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_prog_PTHREAD_CXX+:} false; then :
@@ -17606,7 +17887,7 @@ do
   test -z "$as_dir" && as_dir=.
     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_PTHREAD_CXX="xlC_r"
+    ac_cv_prog_PTHREAD_CXX="$ac_prog"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -17614,7 +17895,6 @@ done
   done
 IFS=$as_save_IFS
 
-  test -z "$ac_cv_prog_PTHREAD_CXX" && ac_cv_prog_PTHREAD_CXX="${CXX}"
 fi
 fi
 PTHREAD_CXX=$ac_cv_prog_PTHREAD_CXX
@@ -17626,34 +17906,40 @@ else
 $as_echo "no" >&6; }
 fi
 
- ;;
-            esac
-            ;;
-        esac
-fi
 
-if test "${PTHREAD_CC}x" = "x"
-then
-  PTHREAD_CC="$CC"
+  test -n "$PTHREAD_CXX" && break
+done
+test -n "$PTHREAD_CXX" || PTHREAD_CXX="$CXX"
+
 fi
-if test "${PTHREAD_CXX}x" = "x"
-then
-  PTHREAD_CXX="$CXX"
+
+                      ;;
+esac
+                     ;; #(
+  *) :
+     ;;
+esac
+                ;;
+            esac
+        fi
 fi
 
+test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
+test -n "$PTHREAD_CXX" || PTHREAD_CXX="$CXX"
+
 
 
 
 
 
 # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
-if test x"$acx_pthread_ok" = xyes; then
+if test "x$ax_pthread_ok" = "xyes"; then
 
 $as_echo "#define HAVE_PTHREAD 1" >>confdefs.h
 
         :
 else
-        acx_pthread_ok=no
+        ax_pthread_ok=no
 
 fi
 ac_ext=c
@@ -17664,7 +17950,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
 
-  if test "$acx_pthread_ok" = yes
+  if test "$ax_pthread_ok" = yes
   then
     have_threads=yes
 
diff --git a/include/Makefile.in b/include/Makefile.in
index ecc1f43..2f51837 100644
--- a/include/Makefile.in
+++ b/include/Makefile.in
@@ -94,11 +94,11 @@ build_triplet = @build@
 host_triplet = @host@
 subdir = include
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/acx_pthread.m4 \
-	$(top_srcdir)/m4/ax_append_compile_flags.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_append_compile_flags.m4 \
 	$(top_srcdir)/m4/ax_append_flag.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
 	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 \
 	$(top_srcdir)/m4/ax_require_defined.m4 \
 	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
 	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
@@ -273,12 +273,12 @@ ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-acx_pthread_config = @acx_pthread_config@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
 am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
+ax_pthread_config = @ax_pthread_config@
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@
diff --git a/plugins/Makefile.in b/plugins/Makefile.in
index 015446a..b3d07fb 100644
--- a/plugins/Makefile.in
+++ b/plugins/Makefile.in
@@ -89,11 +89,11 @@ build_triplet = @build@
 host_triplet = @host@
 subdir = plugins
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/acx_pthread.m4 \
-	$(top_srcdir)/m4/ax_append_compile_flags.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_append_compile_flags.m4 \
 	$(top_srcdir)/m4/ax_append_flag.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
 	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 \
 	$(top_srcdir)/m4/ax_require_defined.m4 \
 	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
 	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
@@ -280,12 +280,12 @@ ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-acx_pthread_config = @acx_pthread_config@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
 am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
+ax_pthread_config = @ax_pthread_config@
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@
diff --git a/plugins/fast_float/Makefile.in b/plugins/fast_float/Makefile.in
index 4c8da11..26d4e93 100644
--- a/plugins/fast_float/Makefile.in
+++ b/plugins/fast_float/Makefile.in
@@ -89,11 +89,11 @@ build_triplet = @build@
 host_triplet = @host@
 subdir = plugins/fast_float
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/acx_pthread.m4 \
-	$(top_srcdir)/m4/ax_append_compile_flags.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_append_compile_flags.m4 \
 	$(top_srcdir)/m4/ax_append_flag.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
 	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 \
 	$(top_srcdir)/m4/ax_require_defined.m4 \
 	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
 	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
@@ -280,12 +280,12 @@ ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-acx_pthread_config = @acx_pthread_config@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
 am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
+ax_pthread_config = @ax_pthread_config@
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@
diff --git a/plugins/fast_float/include/Makefile.in b/plugins/fast_float/include/Makefile.in
index 9629ed7..c71c7ed 100644
--- a/plugins/fast_float/include/Makefile.in
+++ b/plugins/fast_float/include/Makefile.in
@@ -93,11 +93,11 @@ build_triplet = @build@
 host_triplet = @host@
 subdir = plugins/fast_float/include
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/acx_pthread.m4 \
-	$(top_srcdir)/m4/ax_append_compile_flags.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_append_compile_flags.m4 \
 	$(top_srcdir)/m4/ax_append_flag.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
 	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 \
 	$(top_srcdir)/m4/ax_require_defined.m4 \
 	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
 	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
@@ -272,12 +272,12 @@ ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-acx_pthread_config = @acx_pthread_config@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
 am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
+ax_pthread_config = @ax_pthread_config@
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@
diff --git a/plugins/fast_float/src/Makefile.in b/plugins/fast_float/src/Makefile.in
index f420a00..be47f16 100644
--- a/plugins/fast_float/src/Makefile.in
+++ b/plugins/fast_float/src/Makefile.in
@@ -94,11 +94,11 @@ build_triplet = @build@
 host_triplet = @host@
 subdir = plugins/fast_float/src
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/acx_pthread.m4 \
-	$(top_srcdir)/m4/ax_append_compile_flags.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_append_compile_flags.m4 \
 	$(top_srcdir)/m4/ax_append_flag.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
 	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 \
 	$(top_srcdir)/m4/ax_require_defined.m4 \
 	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
 	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
@@ -324,12 +324,12 @@ ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-acx_pthread_config = @acx_pthread_config@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
 am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
+ax_pthread_config = @ax_pthread_config@
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@
diff --git a/plugins/fast_float/testbed/Makefile.in b/plugins/fast_float/testbed/Makefile.in
index eec2fad..16fdcb4 100644
--- a/plugins/fast_float/testbed/Makefile.in
+++ b/plugins/fast_float/testbed/Makefile.in
@@ -94,11 +94,11 @@ host_triplet = @host@
 check_PROGRAMS = fast_float_testbed$(EXEEXT)
 subdir = plugins/fast_float/testbed
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/acx_pthread.m4 \
-	$(top_srcdir)/m4/ax_append_compile_flags.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_append_compile_flags.m4 \
 	$(top_srcdir)/m4/ax_append_flag.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
 	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 \
 	$(top_srcdir)/m4/ax_require_defined.m4 \
 	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
 	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
@@ -280,12 +280,12 @@ ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-acx_pthread_config = @acx_pthread_config@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
 am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
+ax_pthread_config = @ax_pthread_config@
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@
diff --git a/plugins/threaded/Makefile.in b/plugins/threaded/Makefile.in
index ceef354..53b7834 100644
--- a/plugins/threaded/Makefile.in
+++ b/plugins/threaded/Makefile.in
@@ -89,11 +89,11 @@ build_triplet = @build@
 host_triplet = @host@
 subdir = plugins/threaded
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/acx_pthread.m4 \
-	$(top_srcdir)/m4/ax_append_compile_flags.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_append_compile_flags.m4 \
 	$(top_srcdir)/m4/ax_append_flag.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
 	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 \
 	$(top_srcdir)/m4/ax_require_defined.m4 \
 	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
 	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
@@ -280,12 +280,12 @@ ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-acx_pthread_config = @acx_pthread_config@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
 am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
+ax_pthread_config = @ax_pthread_config@
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@
diff --git a/plugins/threaded/include/Makefile.in b/plugins/threaded/include/Makefile.in
index 5e08ee7..34795ca 100644
--- a/plugins/threaded/include/Makefile.in
+++ b/plugins/threaded/include/Makefile.in
@@ -93,11 +93,11 @@ build_triplet = @build@
 host_triplet = @host@
 subdir = plugins/threaded/include
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/acx_pthread.m4 \
-	$(top_srcdir)/m4/ax_append_compile_flags.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_append_compile_flags.m4 \
 	$(top_srcdir)/m4/ax_append_flag.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
 	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 \
 	$(top_srcdir)/m4/ax_require_defined.m4 \
 	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
 	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
@@ -272,12 +272,12 @@ ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-acx_pthread_config = @acx_pthread_config@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
 am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
+ax_pthread_config = @ax_pthread_config@
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@
diff --git a/plugins/threaded/src/Makefile.in b/plugins/threaded/src/Makefile.in
index 35a411c..5318897 100644
--- a/plugins/threaded/src/Makefile.in
+++ b/plugins/threaded/src/Makefile.in
@@ -94,11 +94,11 @@ build_triplet = @build@
 host_triplet = @host@
 subdir = plugins/threaded/src
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/acx_pthread.m4 \
-	$(top_srcdir)/m4/ax_append_compile_flags.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_append_compile_flags.m4 \
 	$(top_srcdir)/m4/ax_append_flag.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
 	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 \
 	$(top_srcdir)/m4/ax_require_defined.m4 \
 	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
 	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
@@ -312,12 +312,12 @@ ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-acx_pthread_config = @acx_pthread_config@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
 am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
+ax_pthread_config = @ax_pthread_config@
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@
diff --git a/plugins/threaded/testbed/Makefile.in b/plugins/threaded/testbed/Makefile.in
index 2a64a29..e452cca 100644
--- a/plugins/threaded/testbed/Makefile.in
+++ b/plugins/threaded/testbed/Makefile.in
@@ -94,11 +94,11 @@ host_triplet = @host@
 check_PROGRAMS = threaded_testbed$(EXEEXT)
 subdir = plugins/threaded/testbed
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/acx_pthread.m4 \
-	$(top_srcdir)/m4/ax_append_compile_flags.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_append_compile_flags.m4 \
 	$(top_srcdir)/m4/ax_append_flag.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
 	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 \
 	$(top_srcdir)/m4/ax_require_defined.m4 \
 	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
 	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
@@ -279,12 +279,12 @@ ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-acx_pthread_config = @acx_pthread_config@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
 am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
+ax_pthread_config = @ax_pthread_config@
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@
diff --git a/src/Makefile.in b/src/Makefile.in
index 434db4c..9356c58 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -94,11 +94,11 @@ build_triplet = @build@
 host_triplet = @host@
 subdir = src
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/acx_pthread.m4 \
-	$(top_srcdir)/m4/ax_append_compile_flags.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_append_compile_flags.m4 \
 	$(top_srcdir)/m4/ax_append_flag.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
 	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 \
 	$(top_srcdir)/m4/ax_require_defined.m4 \
 	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
 	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
@@ -324,12 +324,12 @@ ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-acx_pthread_config = @acx_pthread_config@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
 am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
+ax_pthread_config = @ax_pthread_config@
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@
diff --git a/testbed/Makefile.in b/testbed/Makefile.in
index d303ab1..e84be45 100644
--- a/testbed/Makefile.in
+++ b/testbed/Makefile.in
@@ -94,11 +94,11 @@ host_triplet = @host@
 check_PROGRAMS = testcms$(EXEEXT)
 subdir = testbed
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/acx_pthread.m4 \
-	$(top_srcdir)/m4/ax_append_compile_flags.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_append_compile_flags.m4 \
 	$(top_srcdir)/m4/ax_append_flag.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
 	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 \
 	$(top_srcdir)/m4/ax_require_defined.m4 \
 	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
 	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
@@ -278,12 +278,12 @@ ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-acx_pthread_config = @acx_pthread_config@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
 am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
+ax_pthread_config = @ax_pthread_config@
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@
diff --git a/utils/jpgicc/Makefile.in b/utils/jpgicc/Makefile.in
index b95fe86..3c3c542 100644
--- a/utils/jpgicc/Makefile.in
+++ b/utils/jpgicc/Makefile.in
@@ -96,11 +96,11 @@ host_triplet = @host@
 @HasJPEG_TRUE@bin_PROGRAMS = jpgicc$(EXEEXT)
 subdir = utils/jpgicc
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/acx_pthread.m4 \
-	$(top_srcdir)/m4/ax_append_compile_flags.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_append_compile_flags.m4 \
 	$(top_srcdir)/m4/ax_append_flag.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
 	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 \
 	$(top_srcdir)/m4/ax_require_defined.m4 \
 	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
 	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
@@ -310,12 +310,12 @@ ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-acx_pthread_config = @acx_pthread_config@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
 am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
+ax_pthread_config = @ax_pthread_config@
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@
diff --git a/utils/linkicc/Makefile.in b/utils/linkicc/Makefile.in
index 2a46ce5..b3f832e 100644
--- a/utils/linkicc/Makefile.in
+++ b/utils/linkicc/Makefile.in
@@ -96,11 +96,11 @@ host_triplet = @host@
 bin_PROGRAMS = linkicc$(EXEEXT)
 subdir = utils/linkicc
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/acx_pthread.m4 \
-	$(top_srcdir)/m4/ax_append_compile_flags.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_append_compile_flags.m4 \
 	$(top_srcdir)/m4/ax_append_flag.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
 	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 \
 	$(top_srcdir)/m4/ax_require_defined.m4 \
 	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
 	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
@@ -310,12 +310,12 @@ ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-acx_pthread_config = @acx_pthread_config@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
 am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
+ax_pthread_config = @ax_pthread_config@
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@
diff --git a/utils/psicc/Makefile.in b/utils/psicc/Makefile.in
index 5978e40..3556514 100644
--- a/utils/psicc/Makefile.in
+++ b/utils/psicc/Makefile.in
@@ -96,11 +96,11 @@ host_triplet = @host@
 bin_PROGRAMS = psicc$(EXEEXT)
 subdir = utils/psicc
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/acx_pthread.m4 \
-	$(top_srcdir)/m4/ax_append_compile_flags.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_append_compile_flags.m4 \
 	$(top_srcdir)/m4/ax_append_flag.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
 	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 \
 	$(top_srcdir)/m4/ax_require_defined.m4 \
 	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
 	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
@@ -310,12 +310,12 @@ ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-acx_pthread_config = @acx_pthread_config@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
 am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
+ax_pthread_config = @ax_pthread_config@
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@
diff --git a/utils/tificc/Makefile.in b/utils/tificc/Makefile.in
index 34ecde3..ad93cc8 100644
--- a/utils/tificc/Makefile.in
+++ b/utils/tificc/Makefile.in
@@ -96,11 +96,11 @@ host_triplet = @host@
 @HasTIFF_TRUE@bin_PROGRAMS = tificc$(EXEEXT)
 subdir = utils/tificc
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/acx_pthread.m4 \
-	$(top_srcdir)/m4/ax_append_compile_flags.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_append_compile_flags.m4 \
 	$(top_srcdir)/m4/ax_append_flag.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
 	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 \
 	$(top_srcdir)/m4/ax_require_defined.m4 \
 	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
 	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
@@ -310,12 +310,12 @@ ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-acx_pthread_config = @acx_pthread_config@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
 am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
+ax_pthread_config = @ax_pthread_config@
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@
diff --git a/utils/transicc/Makefile.in b/utils/transicc/Makefile.in
index 053bc88..cc38407 100644
--- a/utils/transicc/Makefile.in
+++ b/utils/transicc/Makefile.in
@@ -96,11 +96,11 @@ host_triplet = @host@
 bin_PROGRAMS = transicc$(EXEEXT)
 subdir = utils/transicc
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/acx_pthread.m4 \
-	$(top_srcdir)/m4/ax_append_compile_flags.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_append_compile_flags.m4 \
 	$(top_srcdir)/m4/ax_append_flag.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
 	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 \
 	$(top_srcdir)/m4/ax_require_defined.m4 \
 	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
 	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
@@ -310,12 +310,12 @@ ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-acx_pthread_config = @acx_pthread_config@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
 am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
+ax_pthread_config = @ax_pthread_config@
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@