Merge branch 'pan/win64-port'

* pan/win64-port:
  Update static cache
  Back to not using 32bit time_t
  Remove ancient WaitForInputIdle workaround
  Iron out bugs in Win64 found in daily builds
  Make Win64 build work both under MSYS and Cygwin
  Fix aclocal.m4 to override changes in opu
  Make whole of OTP build and release on Win64
  Get cerl and distribution working in Win64
  Get working prompt in Win64 using bootstrap code
  Build Win64 Erlang emulator using MSYS
  Add static win64 cache

OTP-9130
OTP-9766

2 files changed, 1793 insertions, 50 deletions

diff --git a/lib/wx/aclocal.m4 b/lib/wx/aclocal.m4
new file mode 100644
index 0000000000..339a15a2bb
--- /dev/null
+++ b/lib/wx/aclocal.m4
@@ -0,0 +1,1766 @@
+dnl
+dnl %CopyrightBegin%
+dnl
+dnl Copyright Ericsson AB 1998-2011. All Rights Reserved.
+dnl
+dnl The contents of this file are subject to the Erlang Public License,
+dnl Version 1.1, (the "License"); you may not use this file except in
+dnl compliance with the License. You should have received a copy of the
+dnl Erlang Public License along with this software. If not, it can be
+dnl retrieved online at http://www.erlang.org/.
+dnl
+dnl Software distributed under the License is distributed on an "AS IS"
+dnl basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+dnl the License for the specific language governing rights and limitations
+dnl under the License.
+dnl
+dnl %CopyrightEnd%
+dnl
+
+dnl
+dnl aclocal.m4
+dnl
+dnl Local macros used in configure.in. The Local Macros which
+dnl could/should be part of autoconf are prefixed LM_, macros specific
+dnl to the Erlang system are prefixed ERL_.
+dnl
+
+AC_DEFUN(LM_PRECIOUS_VARS,
+[
+
+dnl ERL_TOP
+AC_ARG_VAR(ERL_TOP, [Erlang/OTP top source directory])
+
+dnl Tools
+AC_ARG_VAR(CC, [C compiler])
+AC_ARG_VAR(CFLAGS, [C compiler flags])
+AC_ARG_VAR(STATIC_CFLAGS, [C compiler static flags])
+AC_ARG_VAR(CFLAG_RUNTIME_LIBRARY_PATH, [runtime library path linker flag passed via C compiler])
+AC_ARG_VAR(CPP, [C/C++ preprocessor])
+AC_ARG_VAR(CPPFLAGS, [C/C++ preprocessor flags])
+AC_ARG_VAR(CXX, [C++ compiler])
+AC_ARG_VAR(CXXFLAGS, [C++ compiler flags])
+AC_ARG_VAR(LD, [linker (is often overridden by configure)])
+AC_ARG_VAR(LDFLAGS, [linker flags (can be risky to set since LD may be overriden by configure)])
+AC_ARG_VAR(LIBS, [libraries])
+AC_ARG_VAR(DED_LD, [linker for Dynamic Erlang Drivers (set all DED_LD* variables or none)])
+AC_ARG_VAR(DED_LDFLAGS, [linker flags for Dynamic Erlang Drivers (set all DED_LD* variables or none)])
+AC_ARG_VAR(DED_LD_FLAG_RUNTIME_LIBRARY_PATH, [runtime library path linker flag for Dynamic Erlang Drivers (set all DED_LD* variables or none)])
+AC_ARG_VAR(LFS_CFLAGS, [large file support C compiler flags (set all LFS_* variables or none)])
+AC_ARG_VAR(LFS_LDFLAGS, [large file support linker flags (set all LFS_* variables or none)])
+AC_ARG_VAR(LFS_LIBS, [large file support libraries (set all LFS_* variables or none)])
+AC_ARG_VAR(RANLIB, [ranlib])
+AC_ARG_VAR(AR, [ar])
+AC_ARG_VAR(GETCONF, [getconf])
+
+dnl Cross system root
+AC_ARG_VAR(erl_xcomp_sysroot, [Absolute cross system root path (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_isysroot, [Absolute cross system root include path (only used when cross compiling)])
+
+dnl Cross compilation variables
+AC_ARG_VAR(erl_xcomp_bigendian, [big endian system: yes|no (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_linux_clock_gettime_correction, [clock_gettime() can be used for time correction: yes|no (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_linux_nptl, [have Native POSIX Thread Library: yes|no (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_linux_usable_sigusrx, [SIGUSR1 and SIGUSR2 can be used: yes|no (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_linux_usable_sigaltstack, [have working sigaltstack(): yes|no (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_poll, [have working poll(): yes|no (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_kqueue, [have working kqueue(): yes|no (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_putenv_copy, [putenv() stores key-value copy: yes|no (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_reliable_fpe, [have reliable floating point exceptions: yes|no (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_getaddrinfo, [have working getaddrinfo() for both IPv4 and IPv6: yes|no (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_gethrvtime_procfs_ioctl, [have working gethrvtime() which can be used with procfs ioctl(): yes|no (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_clock_gettime_cpu_time, [clock_gettime() can be used for retrieving process CPU time: yes|no (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_after_morecore_hook, [__after_morecore_hook can track malloc()s core memory usage: yes|no (only used when cross compiling)])
+AC_ARG_VAR(erl_xcomp_dlsym_brk_wrappers, [dlsym(RTLD_NEXT, _) brk wrappers can track malloc()s core memory usage: yes|no (only used when cross compiling)])
+
+])
+
+AC_DEFUN(ERL_XCOMP_SYSROOT_INIT,
+[
+erl_xcomp_without_sysroot=no
+if test "$cross_compiling" = "yes"; then
+    test "$erl_xcomp_sysroot" != "" || erl_xcomp_without_sysroot=yes
+    test "$erl_xcomp_isysroot" != "" || erl_xcomp_isysroot="$erl_xcomp_sysroot"
+else
+    erl_xcomp_sysroot=
+    erl_xcomp_isysroot=
+fi
+])
+
+AC_DEFUN(LM_CHECK_GETCONF,
+[
+if test "$cross_compiling" != "yes"; then
+    AC_CHECK_PROG([GETCONF], [getconf], [getconf], [false])
+else
+    dnl First check if we got a `<HOST>-getconf' in $PATH
+    host_getconf="$host_alias-getconf"
+    AC_CHECK_PROG([GETCONF], [$host_getconf], [$host_getconf], [false])
+    if test "$GETCONF" = "false" && test "$erl_xcomp_sysroot" != ""; then
+	dnl We should perhaps give up if we have'nt found it by now, but at
+	dnl least in one Tilera MDE `getconf' under sysroot is a bourne
+	dnl shell script which we can use. We try to find `<HOST>-getconf'
+    	dnl or `getconf' under sysconf, but only under sysconf since
+	dnl `getconf' in $PATH is almost guaranteed to be for the build
+	dnl machine.
+	GETCONF=
+	prfx="$erl_xcomp_sysroot"
+        AC_PATH_TOOL([GETCONF], [getconf], [false],
+	             ["$prfx/usr/bin:$prfx/bin:$prfx/usr/local/bin"])
+    fi
+fi
+])
+
+dnl ----------------------------------------------------------------------
+dnl
+dnl LM_WINDOWS_ENVIRONMENT
+dnl
+dnl
+dnl Tries to determine thw windows build environment, i.e. 
+dnl MIXED_CYGWIN_VC or MIXED_MSYS_VC 
+dnl
+
+AC_DEFUN(LM_WINDOWS_ENVIRONMENT,
+[
+MIXED_CYGWIN=no
+MIXED_MSYS=no
+
+AC_MSG_CHECKING(for mixed cygwin or msys and native VC++ environment)
+if test "X$host" = "Xwin32" -a "x$GCC" != "xyes"; then
+	if test -x /usr/bin/cygpath; then
+		CFLAGS="-O2"
+		MIXED_CYGWIN=yes
+		AC_MSG_RESULT([Cygwin and VC])
+		MIXED_CYGWIN_VC=yes
+		CPPFLAGS="$CPPFLAGS -DERTS_MIXED_CYGWIN_VC"
+	elif test -x /usr/bin/msysinfo; then
+	        CFLAGS="-O2"
+		MIXED_MSYS=yes
+		AC_MSG_RESULT([MSYS and VC])
+		MIXED_MSYS_VC=yes
+		CPPFLAGS="$CPPFLAGS -DERTS_MIXED_MSYS_VC"
+	else		    
+		AC_MSG_RESULT([undeterminable])
+		AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!)
+	fi
+else
+	AC_MSG_RESULT([no])
+	MIXED_CYGWIN_VC=no
+	MIXED_MSYS_VC=no
+fi
+AC_SUBST(MIXED_CYGWIN_VC)
+AC_SUBST(MIXED_MSYS_VC)
+
+MIXED_VC=no
+if test "x$MIXED_MSYS_VC" = "xyes" -o  "x$MIXED_CYGWIN_VC" = "xyes" ; then
+   MIXED_VC=yes
+fi
+
+AC_SUBST(MIXED_VC)
+
+if test "x$MIXED_MSYS" != "xyes"; then
+   AC_MSG_CHECKING(for mixed cygwin and native MinGW environment)
+   if test "X$host" = "Xwin32" -a "x$GCC" = x"yes"; then
+	if test -x /usr/bin/cygpath; then
+		CFLAGS="-O2"
+		MIXED_CYGWIN=yes
+		AC_MSG_RESULT([yes])
+		MIXED_CYGWIN_MINGW=yes
+		CPPFLAGS="$CPPFLAGS -DERTS_MIXED_CYGWIN_MINGW"
+	else
+		AC_MSG_RESULT([undeterminable])
+		AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!)
+	fi
+    else
+	AC_MSG_RESULT([no])
+	MIXED_CYGWIN_MINGW=no
+    fi
+else
+	MIXED_CYGWIN_MINGW=no
+fi	
+AC_SUBST(MIXED_CYGWIN_MINGW)
+
+AC_MSG_CHECKING(if we mix cygwin with any native compiler)
+if test "X$MIXED_CYGWIN" = "Xyes"; then
+	AC_MSG_RESULT([yes])	
+else
+	AC_MSG_RESULT([no])
+fi
+
+AC_SUBST(MIXED_CYGWIN)
+	
+AC_MSG_CHECKING(if we mix msys with another native compiler)
+if test "X$MIXED_MSYS" = "Xyes" ; then
+	AC_MSG_RESULT([yes])	
+else
+	AC_MSG_RESULT([no])
+fi
+
+AC_SUBST(MIXED_MSYS)
+])		
+	
+dnl ----------------------------------------------------------------------
+dnl
+dnl LM_FIND_EMU_CC
+dnl
+dnl
+dnl Tries fairly hard to find a C compiler that can handle jump tables.
+dnl Defines the @EMU_CC@ variable for the makefiles and 
+dnl inserts NO_JUMP_TABLE in the header if one cannot be found...
+dnl
+
+AC_DEFUN(LM_FIND_EMU_CC,
+	[AC_CACHE_CHECK(for a compiler that handles jumptables,
+			ac_cv_prog_emu_cc,
+			[
+AC_TRY_COMPILE([],[
+#if defined(__clang_major__) && __clang_major__ >= 3
+    /* clang 3.x or later is fine */
+#elif defined(__llvm__)
+#error "this version of llvm is unable to correctly compile beam_emu.c"
+#endif
+    __label__ lbl1;
+    __label__ lbl2;
+    int x = magic();
+    static void *jtab[2];
+
+    jtab[0] = &&lbl1;
+    jtab[1] = &&lbl2;
+    goto *jtab[x];
+lbl1:
+    return 1;
+lbl2:
+    return 2;
+],ac_cv_prog_emu_cc=$CC,ac_cv_prog_emu_cc=no)
+
+if test $ac_cv_prog_emu_cc = no; then
+	for ac_progname in emu_cc.sh gcc-4.2 gcc; do
+  		IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS=":"
+  		ac_dummy="$PATH"
+  		for ac_dir in $ac_dummy; do
+    			test -z "$ac_dir" && ac_dir=.
+    			if test -f $ac_dir/$ac_progname; then
+      				ac_cv_prog_emu_cc=$ac_dir/$ac_progname
+      				break
+    			fi
+  		done
+  		IFS="$ac_save_ifs"
+		if test $ac_cv_prog_emu_cc != no; then
+			break
+		fi
+	done
+fi
+
+if test $ac_cv_prog_emu_cc != no; then
+	save_CC=$CC
+	save_CFLAGS=$CFLAGS
+	save_CPPFLAGS=$CPPFLAGS
+	CC=$ac_cv_prog_emu_cc
+	CFLAGS=""
+	CPPFLAGS=""
+	AC_TRY_COMPILE([],[
+#if defined(__clang_major__) && __clang_major__ >= 3
+    /* clang 3.x or later is fine */
+#elif defined(__llvm__)
+#error "this version of llvm is unable to correctly compile beam_emu.c"
+#endif
+    	__label__ lbl1;
+    	__label__ lbl2;
+    	int x = magic();
+    	static void *jtab[2];
+
+    	jtab[0] = &&lbl1;
+    	jtab[1] = &&lbl2;
+    	goto *jtab[x];
+	lbl1:
+    	return 1;
+	lbl2:
+    	return 2;
+	],ac_cv_prog_emu_cc=$CC,ac_cv_prog_emu_cc=no)
+	CC=$save_CC
+	CFLAGS=$save_CFLAGS
+	CPPFLAGS=$save_CPPFLAGS
+fi
+])
+if test $ac_cv_prog_emu_cc = no; then
+	AC_DEFINE(NO_JUMP_TABLE,[],[Defined if no found C compiler can handle jump tables])
+	EMU_CC=$CC
+else
+	EMU_CC=$ac_cv_prog_emu_cc
+fi
+AC_SUBST(EMU_CC)
+])		
+			
+
+
+dnl ----------------------------------------------------------------------
+dnl
+dnl LM_PROG_INSTALL_DIR
+dnl
+dnl This macro may be used by any OTP application.
+dnl
+dnl Figure out how to create directories with parents.
+dnl (In my opinion INSTALL_DIR is a bad name, MKSUBDIRS or something is better)
+dnl
+dnl We prefer 'install -d', but use 'mkdir -p' if it exists.
+dnl If none of these methods works, we give up.
+dnl
+
+
+AC_DEFUN(LM_PROG_INSTALL_DIR,
+[AC_CACHE_CHECK(how to create a directory including parents,
+ac_cv_prog_mkdir_p,
+[
+temp_name_base=config.$$
+temp_name=$temp_name_base/x/y/z
+$INSTALL -d $temp_name >/dev/null 2>&1
+ac_cv_prog_mkdir_p=none
+if test -d $temp_name; then
+        ac_cv_prog_mkdir_p="$INSTALL -d"
+else
+        mkdir -p $temp_name >/dev/null 2>&1
+        if test -d $temp_name; then
+                ac_cv_prog_mkdir_p="mkdir -p"
+        fi
+fi
+rm -fr $temp_name_base           
+])
+
+case "${ac_cv_prog_mkdir_p}" in
+  none) AC_MSG_ERROR(don't know how create directories with parents) ;;
+  *)    INSTALL_DIR="$ac_cv_prog_mkdir_p" AC_SUBST(INSTALL_DIR)     ;;
+esac
+])
+
+
+dnl ----------------------------------------------------------------------
+dnl
+dnl LM_PROG_PERL5
+dnl
+dnl Try to find perl version 5. If found set PERL to the absolute path
+dnl of the program, if not found set PERL to false.
+dnl
+dnl On some systems /usr/bin/perl is perl 4 and e.g.
+dnl /usr/local/bin/perl is perl 5. We try to handle this case by
+dnl putting a couple of 
+dnl Tries to handle the case that there are two programs called perl
+dnl in the path and one of them is perl 5 and the other isn't. 
+dnl
+AC_DEFUN(LM_PROG_PERL5,
+[AC_PATH_PROGS(PERL, perl5 perl, false,
+   /usr/local/bin:/opt/local/bin:/usr/local/gnu/bin:${PATH})
+changequote(, )dnl
+dnl[ That bracket is needed to balance the right bracket below
+if test "$PERL" = "false" || $PERL -e 'exit ($] >= 5)'; then
+changequote([, ])dnl
+  ac_cv_path_PERL=false
+  PERL=false
+dnl  AC_MSG_WARN(perl version 5 not found)
+fi
+])dnl
+
+
+dnl ----------------------------------------------------------------------
+dnl
+dnl LM_DECL_SO_BSDCOMPAT
+dnl
+dnl Check if the system has the SO_BSDCOMPAT flag on sockets (linux) 
+dnl
+AC_DEFUN(LM_DECL_SO_BSDCOMPAT,
+[AC_CACHE_CHECK([for SO_BSDCOMPAT declaration], ac_cv_decl_so_bsdcompat,
+AC_TRY_COMPILE([#include <sys/socket.h>], [int i = SO_BSDCOMPAT;],
+               ac_cv_decl_so_bsdcompat=yes,
+               ac_cv_decl_so_bsdcompat=no))
+
+case "${ac_cv_decl_so_bsdcompat}" in
+  "yes" ) AC_DEFINE(HAVE_SO_BSDCOMPAT,[],
+		[Define if you have SO_BSDCOMPAT flag on sockets]) ;;
+  * ) ;;
+esac
+])
+
+
+dnl ----------------------------------------------------------------------
+dnl
+dnl LM_DECL_INADDR_LOOPBACK
+dnl
+dnl Try to find declaration of INADDR_LOOPBACK, if nowhere provide a default
+dnl
+
+AC_DEFUN(LM_DECL_INADDR_LOOPBACK,
+[AC_CACHE_CHECK([for INADDR_LOOPBACK in netinet/in.h],
+ ac_cv_decl_inaddr_loopback,
+[AC_TRY_COMPILE([#include <sys/types.h>
+#include <netinet/in.h>], [int i = INADDR_LOOPBACK;],
+ac_cv_decl_inaddr_loopback=yes, ac_cv_decl_inaddr_loopback=no)
+])
+
+if test ${ac_cv_decl_inaddr_loopback} = no; then
+  AC_CACHE_CHECK([for INADDR_LOOPBACK in rpc/types.h],
+                   ac_cv_decl_inaddr_loopback_rpc,
+                   AC_TRY_COMPILE([#include <rpc/types.h>],
+                                   [int i = INADDR_LOOPBACK;],
+                                   ac_cv_decl_inaddr_loopback_rpc=yes,
+                                   ac_cv_decl_inaddr_loopback_rpc=no))
+
+   case "${ac_cv_decl_inaddr_loopback_rpc}" in
+     "yes" )
+        AC_DEFINE(DEF_INADDR_LOOPBACK_IN_RPC_TYPES_H,[],
+		[Define if you need to include rpc/types.h to get INADDR_LOOPBACK defined]) ;;
+      * )
+  	AC_CACHE_CHECK([for INADDR_LOOPBACK in winsock2.h],
+                   ac_cv_decl_inaddr_loopback_winsock2,
+                   AC_TRY_COMPILE([#define WIN32_LEAN_AND_MEAN
+				   #include <winsock2.h>],
+                                   [int i = INADDR_LOOPBACK;],
+                                   ac_cv_decl_inaddr_loopback_winsock2=yes,
+                                   ac_cv_decl_inaddr_loopback_winsock2=no))
+	case "${ac_cv_decl_inaddr_loopback_winsock2}" in
+     		"yes" )
+			AC_DEFINE(DEF_INADDR_LOOPBACK_IN_WINSOCK2_H,[],
+				[Define if you need to include winsock2.h to get INADDR_LOOPBACK defined]) ;;
+		* )
+			# couldn't find it anywhere
+        		AC_DEFINE(HAVE_NO_INADDR_LOOPBACK,[],
+				[Define if you don't have a definition of INADDR_LOOPBACK]) ;;
+	esac;;
+   esac
+fi
+])
+
+
+dnl ----------------------------------------------------------------------
+dnl
+dnl LM_STRUCT_SOCKADDR_SA_LEN
+dnl
+dnl Check if the sockaddr structure has the field sa_len
+dnl
+
+AC_DEFUN(LM_STRUCT_SOCKADDR_SA_LEN,
+[AC_CACHE_CHECK([whether struct sockaddr has sa_len field],
+                ac_cv_struct_sockaddr_sa_len,
+AC_TRY_COMPILE([#include <sys/types.h>
+#include <sys/socket.h>], [struct sockaddr s; s.sa_len = 10;],
+  ac_cv_struct_sockaddr_sa_len=yes, ac_cv_struct_sockaddr_sa_len=no))
+
+dnl FIXME convbreak
+case ${ac_cv_struct_sockaddr_sa_len} in
+  "no" ) AC_DEFINE(NO_SA_LEN,[1],[Define if you dont have salen]) ;;
+  *) ;;
+esac
+])
+
+dnl ----------------------------------------------------------------------
+dnl
+dnl LM_STRUCT_EXCEPTION
+dnl
+dnl Check to see whether the system supports the matherr function
+dnl and its associated type "struct exception".
+dnl
+
+AC_DEFUN(LM_STRUCT_EXCEPTION,
+[AC_CACHE_CHECK([for struct exception (and matherr function)],
+ ac_cv_struct_exception,
+AC_TRY_COMPILE([#include <math.h>],
+  [struct exception x; x.type = DOMAIN; x.type = SING;],
+  ac_cv_struct_exception=yes, ac_cv_struct_exception=no))
+
+case "${ac_cv_struct_exception}" in
+  "yes" ) AC_DEFINE(USE_MATHERR,[1],[Define if you have matherr() function and struct exception type]) ;;
+  *  ) ;;
+esac
+])
+
+
+dnl ----------------------------------------------------------------------
+dnl
+dnl LM_SYS_IPV6
+dnl
+dnl Check for ipv6 support and what the in6_addr structure is called.
+dnl (early linux used in_addr6 insted of in6_addr)
+dnl
+
+AC_DEFUN(LM_SYS_IPV6,
+[AC_MSG_CHECKING(for IP version 6 support)
+AC_CACHE_VAL(ac_cv_sys_ipv6_support,
+[ok_so_far=yes
+ AC_TRY_COMPILE([#include <sys/types.h>
+#ifdef __WIN32__
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#else
+#include <netinet/in.h>
+#endif],
+   [struct in6_addr a6; struct sockaddr_in6 s6;], ok_so_far=yes, ok_so_far=no)
+
+if test $ok_so_far = yes; then
+  ac_cv_sys_ipv6_support=yes
+else
+  AC_TRY_COMPILE([#include <sys/types.h>
+#ifdef __WIN32__
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#else
+#include <netinet/in.h>
+#endif],
+    [struct in_addr6 a6; struct sockaddr_in6 s6;],
+    ac_cv_sys_ipv6_support=in_addr6, ac_cv_sys_ipv6_support=no)
+fi
+])dnl
+
+dnl
+dnl Have to use old style AC_DEFINE due to BC with old autoconf.
+dnl
+
+case ${ac_cv_sys_ipv6_support} in
+  yes)
+    AC_MSG_RESULT(yes)
+    AC_DEFINE(HAVE_IN6,[1],[Define if ipv6 is present])
+    ;;
+  in_addr6)
+    AC_MSG_RESULT([yes (but I am redefining in_addr6 to in6_addr)])
+    AC_DEFINE(HAVE_IN6,[1],[Define if ipv6 is present])
+    AC_DEFINE(HAVE_IN_ADDR6_STRUCT,[],[Early linux used in_addr6 instead of in6_addr, define if you have this])
+    ;;
+  *)
+    AC_MSG_RESULT(no)
+    ;;
+esac
+])
+
+
+dnl ----------------------------------------------------------------------
+dnl
+dnl LM_SYS_MULTICAST
+dnl
+dnl Check for multicast support. Only checks for multicast options in
+dnl setsockopt(), no check is performed that multicasting actually works.
+dnl If options are found defines HAVE_MULTICAST_SUPPORT
+dnl
+
+AC_DEFUN(LM_SYS_MULTICAST,
+[AC_CACHE_CHECK([for multicast support], ac_cv_sys_multicast_support,
+[AC_EGREP_CPP(yes,
+[#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#if defined(IP_MULTICAST_TTL) && defined(IP_MULTICAST_LOOP) && defined(IP_MULTICAST_IF) && defined(IP_ADD_MEMBERSHIP) && defined(IP_DROP_MEMBERSHIP)
+yes
+#endif
+], ac_cv_sys_multicast_support=yes, ac_cv_sys_multicast_support=no)])
+if test $ac_cv_sys_multicast_support = yes; then
+  AC_DEFINE(HAVE_MULTICAST_SUPPORT,[1],
+	[Define if setsockopt() accepts multicast options])
+fi
+])dnl
+
+
+dnl ----------------------------------------------------------------------
+dnl
+dnl LM_DECL_SYS_ERRLIST
+dnl
+dnl Define SYS_ERRLIST_DECLARED if the variable sys_errlist is declared
+dnl in a system header file, stdio.h or errno.h.
+dnl
+
+AC_DEFUN(LM_DECL_SYS_ERRLIST,
+[AC_CACHE_CHECK([for sys_errlist declaration in stdio.h or errno.h],
+  ac_cv_decl_sys_errlist,
+[AC_TRY_COMPILE([#include <stdio.h>
+#include <errno.h>], [char *msg = *(sys_errlist + 1);],
+  ac_cv_decl_sys_errlist=yes, ac_cv_decl_sys_errlist=no)])
+if test $ac_cv_decl_sys_errlist = yes; then
+  AC_DEFINE(SYS_ERRLIST_DECLARED,[],
+	[define if the variable sys_errlist is declared in a system header file])
+fi
+])
+
+
+dnl ----------------------------------------------------------------------
+dnl
+dnl LM_CHECK_FUNC_DECL( funname, declaration [, extra includes 
+dnl                     [, action-if-found [, action-if-not-found]]] )
+dnl
+dnl Checks if the declaration "declaration" of "funname" conflicts
+dnl with the header files idea of how the function should be
+dnl declared. It is useful on systems which lack prototypes and you
+dnl need to provide your own (e.g. when you want to take the address
+dnl of a function). The 4'th argument is expanded if conflicting, 
+dnl the 5'th argument otherwise
+dnl
+dnl
+
+AC_DEFUN(LM_CHECK_FUNC_DECL,
+[AC_MSG_CHECKING([for conflicting declaration of $1])
+AC_CACHE_VAL(ac_cv_func_decl_$1,
+[AC_TRY_COMPILE([#include <stdio.h>
+$3],[$2
+char *c = (char *)$1;
+], eval "ac_cv_func_decl_$1=no", eval "ac_cv_func_decl_$1=yes")])
+if eval "test \"`echo '$ac_cv_func_decl_'$1`\" = yes"; then
+  AC_MSG_RESULT(yes)
+  ifelse([$4], , :, [$4])
+else
+  AC_MSG_RESULT(no)
+ifelse([$5], , , [$5
+])dnl
+fi
+])
+
+
+dnl ----------------------------------------------------------------------
+dnl
+dnl LM_CHECK_THR_LIB
+dnl
+dnl This macro may be used by any OTP application.
+dnl
+dnl LM_CHECK_THR_LIB sets THR_LIBS, THR_DEFS, and THR_LIB_NAME. It also
+dnl checks for some pthread headers which will appear in DEFS or config.h.
+dnl
+
+AC_DEFUN(LM_CHECK_THR_LIB,
+[
+
+NEED_NPTL_PTHREAD_H=no
+
+dnl win32?
+AC_MSG_CHECKING([for native win32 threads])
+if test "X$host_os" = "Xwin32"; then
+    AC_MSG_RESULT(yes)
+    THR_DEFS="-DWIN32_THREADS"
+    THR_LIBS=
+    THR_LIB_NAME=win32_threads
+    THR_LIB_TYPE=win32_threads
+else
+    AC_MSG_RESULT(no)
+    THR_DEFS=
+    THR_LIBS=
+    THR_LIB_NAME=
+    THR_LIB_TYPE=posix_unknown
+
+dnl Try to find POSIX threads
+
+dnl The usual pthread lib...
+    AC_CHECK_LIB(pthread, pthread_create, THR_LIBS="-lpthread")
+
+dnl FreeBSD has pthreads in special c library, c_r...
+    if test "x$THR_LIBS" = "x"; then
+	AC_CHECK_LIB(c_r, pthread_create, THR_LIBS="-lc_r")
+    fi
+
+dnl On ofs1 the '-pthread' switch should be used
+    if test "x$THR_LIBS" = "x"; then
+	AC_MSG_CHECKING([if the '-pthread' switch can be used])
+	saved_cflags=$CFLAGS
+	CFLAGS="$CFLAGS -pthread"
+	AC_TRY_LINK([#include <pthread.h>],
+		    pthread_create((void*)0,(void*)0,(void*)0,(void*)0);,
+		    [THR_DEFS="-pthread"
+		     THR_LIBS="-pthread"])
+	CFLAGS=$saved_cflags
+	if test "x$THR_LIBS" != "x"; then
+	    AC_MSG_RESULT(yes)
+	else
+	    AC_MSG_RESULT(no)
+	fi
+    fi
+
+    if test "x$THR_LIBS" != "x"; then
+	THR_DEFS="$THR_DEFS -D_THREAD_SAFE -D_REENTRANT -DPOSIX_THREADS"
+	THR_LIB_NAME=pthread
+	case $host_os in
+	    solaris*)
+		THR_DEFS="$THR_DEFS -D_POSIX_PTHREAD_SEMANTICS" ;;
+	    linux*)
+		THR_DEFS="$THR_DEFS -D_POSIX_THREAD_SAFE_FUNCTIONS"
+
+		LM_CHECK_GETCONF
+		AC_MSG_CHECKING(for Native POSIX Thread Library)
+		libpthr_vsn=`$GETCONF GNU_LIBPTHREAD_VERSION 2>/dev/null`
+		if test $? -eq 0; then
+		    case "$libpthr_vsn" in
+			*nptl*|*NPTL*) nptl=yes;;
+			*) nptl=no;;
+		    esac
+		elif test "$cross_compiling" = "yes"; then
+		    case "$erl_xcomp_linux_nptl" in
+			"") nptl=cross;;
+			yes|no) nptl=$erl_xcomp_linux_nptl;;
+			*) AC_MSG_ERROR([Bad erl_xcomp_linux_nptl value: $erl_xcomp_linux_nptl]);;
+		    esac
+		else
+		    nptl=no
+		fi
+		AC_MSG_RESULT($nptl)
+		if test $nptl = cross; then
+		    nptl=yes
+		    AC_MSG_WARN([result yes guessed because of cross compilation])
+		fi
+		if test $nptl = yes; then
+		    THR_LIB_TYPE=posix_nptl
+		    need_nptl_incldir=no
+		    AC_CHECK_HEADER(nptl/pthread.h,
+				    [need_nptl_incldir=yes
+				     NEED_NPTL_PTHREAD_H=yes])
+		    if test $need_nptl_incldir = yes; then
+			# Ahh...
+			nptl_path="$C_INCLUDE_PATH:$CPATH"
+			if test X$cross_compiling != Xyes; then
+			    nptl_path="$nptl_path:/usr/local/include:/usr/include"
+			else
+			    IROOT="$erl_xcomp_isysroot"
+			    test "$IROOT" != "" || IROOT="$erl_xcomp_sysroot"
+			    test "$IROOT" != "" || AC_MSG_ERROR([Don't know where to search for includes! Please set erl_xcomp_isysroot])
+			    nptl_path="$nptl_path:$IROOT/usr/local/include:$IROOT/usr/include"
+			fi
+			nptl_ws_path=
+			save_ifs="$IFS"; IFS=":"
+			for dir in $nptl_path; do
+			    if test "x$dir" != "x"; then
+				nptl_ws_path="$nptl_ws_path $dir"
+			    fi
+			done
+			IFS=$save_ifs
+			nptl_incldir=
+			for dir in $nptl_ws_path; do
+		            AC_CHECK_HEADER($dir/nptl/pthread.h,
+					    nptl_incldir=$dir/nptl)
+			    if test "x$nptl_incldir" != "x"; then
+				THR_DEFS="$THR_DEFS -isystem $nptl_incldir"
+				break
+			    fi
+			done
+			if test "x$nptl_incldir" = "x"; then
+			    AC_MSG_ERROR(Failed to locate nptl system include directory)
+			fi
+		    fi
+		fi
+		;;
+	    *) ;;
+	esac
+
+	dnl We sometimes need THR_DEFS in order to find certain headers
+	dnl (at least for pthread.h on osf1).
+	saved_cppflags=$CPPFLAGS
+	CPPFLAGS="$CPPFLAGS $THR_DEFS"
+
+	dnl
+	dnl Check for headers
+	dnl
+
+	AC_CHECK_HEADER(pthread.h,
+			AC_DEFINE(HAVE_PTHREAD_H, 1, \
+[Define if you have the <pthread.h> header file.]))
+
+	dnl Some Linuxes have <pthread/mit/pthread.h> instead of <pthread.h>
+	AC_CHECK_HEADER(pthread/mit/pthread.h, \
+			AC_DEFINE(HAVE_MIT_PTHREAD_H, 1, \
+[Define if the pthread.h header file is in pthread/mit directory.]))
+
+	dnl restore CPPFLAGS
+	CPPFLAGS=$saved_cppflags
+
+    fi
+fi
+
+])
+
+AC_DEFUN(ERL_INTERNAL_LIBS,
+[
+
+ERTS_INTERNAL_X_LIBS=
+
+AC_CHECK_LIB(kstat, kstat_open,
+[AC_DEFINE(HAVE_KSTAT, 1, [Define if you have kstat])
+ERTS_INTERNAL_X_LIBS="$ERTS_INTERNAL_X_LIBS -lkstat"])
+
+AC_SUBST(ERTS_INTERNAL_X_LIBS)
+
+])
+
+AC_DEFUN(ETHR_CHK_SYNC_OP,
+[
+    AC_MSG_CHECKING([for $3-bit $1()])
+    case "$2" in
+	"1") sync_call="$1(&var);";;
+	"2") sync_call="$1(&var, ($4) 0);";;
+	"3") sync_call="$1(&var, ($4) 0, ($4) 0);";;
+    esac
+    have_sync_op=no
+    AC_TRY_LINK([],
+	[
+	    $4 res;
+	    volatile $4 var;
+	    res = $sync_call
+	],
+	[have_sync_op=yes])
+    test $have_sync_op = yes && $5
+    AC_MSG_RESULT([$have_sync_op])
+])
+
+AC_DEFUN(ETHR_CHK_INTERLOCKED,
+[
+    ilckd="$1"
+    AC_MSG_CHECKING([for ${ilckd}()])
+    case "$2" in
+	"1") ilckd_call="${ilckd}(var);";;
+	"2") ilckd_call="${ilckd}(var, ($3) 0);";;
+	"3") ilckd_call="${ilckd}(var, ($3) 0, ($3) 0);";;
+	"4") ilckd_call="${ilckd}(var, ($3) 0, ($3) 0, arr);";;
+    esac
+    have_interlocked_op=no
+    AC_TRY_LINK(
+	[
+	#define WIN32_LEAN_AND_MEAN
+	#include <windows.h>
+	#include <intrin.h>
+	],
+	[
+	    volatile $3 *var;
+	    volatile $3 arr[2];
+
+	    $ilckd_call
+	    return 0;
+	],
+	[have_interlocked_op=yes])
+    test $have_interlocked_op = yes && $4
+    AC_MSG_RESULT([$have_interlocked_op])
+])
+
+dnl ----------------------------------------------------------------------
+dnl
+dnl ERL_FIND_ETHR_LIB
+dnl
+dnl NOTE! This macro may be changed at any time! Should *only* be used by
+dnl       ERTS!
+dnl
+dnl Find a thread library to use. Sets ETHR_LIBS to libraries to link
+dnl with, ETHR_X_LIBS to extra libraries to link with (same as ETHR_LIBS
+dnl except that the ethread lib itself is not included), ETHR_DEFS to
+dnl defines to compile with, ETHR_THR_LIB_BASE to the name of the
+dnl thread library which the ethread library is based on, and ETHR_LIB_NAME
+dnl to the name of the library where the ethread implementation is located.
+dnl  ERL_FIND_ETHR_LIB currently searches for 'pthreads', and
+dnl 'win32_threads'. If no thread library was found ETHR_LIBS, ETHR_X_LIBS,
+dnl ETHR_DEFS, ETHR_THR_LIB_BASE, and ETHR_LIB_NAME are all set to the
+dnl empty string.
+dnl
+
+AC_DEFUN(ERL_FIND_ETHR_LIB,
+[
+
+LM_CHECK_THR_LIB
+ERL_INTERNAL_LIBS
+
+ethr_have_native_atomics=no
+ethr_have_native_spinlock=no
+ETHR_THR_LIB_BASE="$THR_LIB_NAME"
+ETHR_THR_LIB_BASE_TYPE="$THR_LIB_TYPE"
+ETHR_DEFS="$THR_DEFS"
+ETHR_X_LIBS="$THR_LIBS $ERTS_INTERNAL_X_LIBS"
+ETHR_LIBS=
+ETHR_LIB_NAME=
+
+ethr_modified_default_stack_size=
+
+dnl Name of lib where ethread implementation is located
+ethr_lib_name=ethread
+
+case "$THR_LIB_NAME" in
+
+    win32_threads)
+	ETHR_THR_LIB_BASE_DIR=win
+	# * _WIN32_WINNT >= 0x0400 is needed for
+	#   TryEnterCriticalSection
+	# * _WIN32_WINNT >= 0x0403 is needed for
+	#   InitializeCriticalSectionAndSpinCount
+	# The ethread lib will refuse to build if _WIN32_WINNT < 0x0403.
+	#
+	# -D_WIN32_WINNT should have been defined in $CPPFLAGS; fetch it
+	# and save it in ETHR_DEFS.
+	found_win32_winnt=no
+	for cppflag in $CPPFLAGS; do
+	    case $cppflag in
+		-DWINVER*)
+		    ETHR_DEFS="$ETHR_DEFS $cppflag"
+		    ;;
+		-D_WIN32_WINNT*)
+		    ETHR_DEFS="$ETHR_DEFS $cppflag"
+		    found_win32_winnt=yes
+		    ;;
+		*)
+		    ;;
+	    esac
+        done
+        if test $found_win32_winnt = no; then
+	    AC_MSG_ERROR([-D_WIN32_WINNT missing in CPPFLAGS])
+        fi
+
+	AC_DEFINE(ETHR_WIN32_THREADS, 1, [Define if you have win32 threads])
+
+	ETHR_CHK_INTERLOCKED([_InterlockedDecrement], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT, 1, [Define if you have _InterlockedDecrement()]))
+	ETHR_CHK_INTERLOCKED([_InterlockedDecrement_rel], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT_REL, 1, [Define if you have _InterlockedDecrement_rel()]))
+	ETHR_CHK_INTERLOCKED([_InterlockedIncrement], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT, 1, [Define if you have _InterlockedIncrement()]))
+	ETHR_CHK_INTERLOCKED([_InterlockedIncrement_acq], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT_ACQ, 1, [Define if you have _InterlockedIncrement_acq()]))
+	ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD, 1, [Define if you have _InterlockedExchangeAdd()]))
+	ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd_acq], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD_ACQ, 1, [Define if you have _InterlockedExchangeAdd_acq()]))
+	ETHR_CHK_INTERLOCKED([_InterlockedAnd], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDAND, 1, [Define if you have _InterlockedAnd()]))
+	ETHR_CHK_INTERLOCKED([_InterlockedOr], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDOR, 1, [Define if you have _InterlockedOr()]))
+	ETHR_CHK_INTERLOCKED([_InterlockedExchange], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGE, 1, [Define if you have _InterlockedExchange()]))
+	ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange], [3], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE, 1, [Define if you have _InterlockedCompareExchange()]))
+	test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes
+	ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange_acq], [3], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE_ACQ, 1, [Define if you have _InterlockedCompareExchange_acq()]))
+	test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes
+	ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange_rel], [3], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE_REL, 1, [Define if you have _InterlockedCompareExchange_rel()]))
+	test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes
+
+	ETHR_CHK_INTERLOCKED([_InterlockedDecrement64], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT64, 1, [Define if you have _InterlockedDecrement64()]))
+	ETHR_CHK_INTERLOCKED([_InterlockedDecrement64_rel], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT64_REL, 1, [Define if you have _InterlockedDecrement64_rel()]))
+	ETHR_CHK_INTERLOCKED([_InterlockedIncrement64], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT64, 1, [Define if you have _InterlockedIncrement64()]))
+	ETHR_CHK_INTERLOCKED([_InterlockedIncrement64_acq], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT64_ACQ, 1, [Define if you have _InterlockedIncrement64_acq()]))
+	ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD64, 1, [Define if you have _InterlockedExchangeAdd64()]))
+	ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd64_acq], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD64_ACQ, 1, [Define if you have _InterlockedExchangeAdd64_acq()]))
+	ETHR_CHK_INTERLOCKED([_InterlockedAnd64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDAND64, 1, [Define if you have _InterlockedAnd64()]))
+	ETHR_CHK_INTERLOCKED([_InterlockedOr64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDOR64, 1, [Define if you have _InterlockedOr64()]))
+	ETHR_CHK_INTERLOCKED([_InterlockedExchange64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGE64, 1, [Define if you have _InterlockedExchange64()]))
+	ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange64], [3], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE64, 1, [Define if you have _InterlockedCompareExchange64()]))
+	test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes
+	ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange64_acq], [3], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE64_ACQ, 1, [Define if you have _InterlockedCompareExchange64_acq()]))
+	test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes
+	ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange64_rel], [3], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE64_REL, 1, [Define if you have _InterlockedCompareExchange64_rel()]))
+	test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes
+
+	ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange128], [4], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE128, 1, [Define if you have _InterlockedCompareExchange128()]))
+
+	test "$ethr_have_native_atomics" = "yes" && ethr_have_native_spinlock=yes
+	;;
+
+    pthread)
+	ETHR_THR_LIB_BASE_DIR=pthread
+    	AC_DEFINE(ETHR_PTHREADS, 1, [Define if you have pthreads])
+	case $host_os in
+	    openbsd*)
+		# The default stack size is insufficient for our needs
+		# on OpenBSD. We increase it to 256 kilo words.
+		ethr_modified_default_stack_size=256;;
+	    linux*)
+		ETHR_DEFS="$ETHR_DEFS -D_GNU_SOURCE"
+
+		if test	X$cross_compiling = Xyes; then
+		    case X$erl_xcomp_linux_usable_sigusrx in
+			X) usable_sigusrx=cross;;
+			Xyes|Xno) usable_sigusrx=$erl_xcomp_linux_usable_sigusrx;;
+			*) AC_MSG_ERROR([Bad erl_xcomp_linux_usable_sigusrx value: $erl_xcomp_linux_usable_sigusrx]);;
+		    esac
+		    case X$erl_xcomp_linux_usable_sigaltstack in
+			X) usable_sigaltstack=cross;;
+			Xyes|Xno) usable_sigaltstack=$erl_xcomp_linux_usable_sigaltstack;;
+			*) AC_MSG_ERROR([Bad erl_xcomp_linux_usable_sigaltstack value: $erl_xcomp_linux_usable_sigaltstack]);;
+		    esac
+		else
+		    # FIXME: Test for actual problems instead of kernel versions
+		    linux_kernel_vsn_=`uname -r`
+		    case $linux_kernel_vsn_ in
+			[[0-1]].*|2.[[0-1]]|2.[[0-1]].*)
+			    usable_sigusrx=no
+			    usable_sigaltstack=no;;
+			2.[[2-3]]|2.[[2-3]].*)
+			    usable_sigusrx=yes
+			    usable_sigaltstack=no;;
+		    	*)
+			    usable_sigusrx=yes
+			    usable_sigaltstack=yes;;
+		    esac
+		fi
+
+		AC_MSG_CHECKING(if SIGUSR1 and SIGUSR2 can be used)
+		AC_MSG_RESULT($usable_sigusrx)
+		if test $usable_sigusrx = cross; then
+		    usable_sigusrx=yes
+		    AC_MSG_WARN([result yes guessed because of cross compilation])
+		fi
+		if test $usable_sigusrx = no; then
+		    ETHR_DEFS="$ETHR_DEFS -DETHR_UNUSABLE_SIGUSRX"
+		fi
+
+		AC_MSG_CHECKING(if sigaltstack can be used)
+		AC_MSG_RESULT($usable_sigaltstack)
+		if test $usable_sigaltstack = cross; then
+		    usable_sigaltstack=yes
+		    AC_MSG_WARN([result yes guessed because of cross compilation])
+		fi
+		if test $usable_sigaltstack = no; then
+		    ETHR_DEFS="$ETHR_DEFS -DETHR_UNUSABLE_SIGALTSTACK"
+		fi
+		;;
+	    *) ;;
+	esac
+
+	dnl We sometimes need ETHR_DEFS in order to find certain headers
+	dnl (at least for pthread.h on osf1).
+	saved_cppflags="$CPPFLAGS"
+	CPPFLAGS="$CPPFLAGS $ETHR_DEFS"
+
+	dnl We need the thread library in order to find some functions
+	saved_libs="$LIBS"
+	LIBS="$LIBS $ETHR_X_LIBS"
+
+	dnl
+	dnl Check for headers
+	dnl
+
+	AC_CHECK_HEADER(pthread.h, \
+			AC_DEFINE(ETHR_HAVE_PTHREAD_H, 1, \
+[Define if you have the <pthread.h> header file.]))
+
+	dnl Some Linuxes have <pthread/mit/pthread.h> instead of <pthread.h>
+	AC_CHECK_HEADER(pthread/mit/pthread.h, \
+			AC_DEFINE(ETHR_HAVE_MIT_PTHREAD_H, 1, \
+[Define if the pthread.h header file is in pthread/mit directory.]))
+
+	if test $NEED_NPTL_PTHREAD_H = yes; then
+	    AC_DEFINE(ETHR_NEED_NPTL_PTHREAD_H, 1, \
+[Define if you need the <nptl/pthread.h> header file.])
+	fi
+
+	AC_CHECK_HEADER(sched.h, \
+			AC_DEFINE(ETHR_HAVE_SCHED_H, 1, \
+[Define if you have the <sched.h> header file.]))
+
+	AC_CHECK_HEADER(sys/time.h, \
+			AC_DEFINE(ETHR_HAVE_SYS_TIME_H, 1, \
+[Define if you have the <sys/time.h> header file.]))
+
+	AC_TRY_COMPILE([#include <time.h>
+			#include <sys/time.h>], 
+			[struct timeval *tv; return 0;],
+			AC_DEFINE(ETHR_TIME_WITH_SYS_TIME, 1, \
+[Define if you can safely include both <sys/time.h> and <time.h>.]))
+
+
+	dnl
+	dnl Check for functions
+	dnl
+
+	AC_CHECK_FUNC(pthread_spin_lock, \
+			[ethr_have_native_spinlock=yes \
+			 AC_DEFINE(ETHR_HAVE_PTHREAD_SPIN_LOCK, 1, \
+[Define if you have the pthread_spin_lock function.])])
+
+	have_sched_yield=no
+	have_librt_sched_yield=no
+	AC_CHECK_FUNC(sched_yield, [have_sched_yield=yes])
+	if test $have_sched_yield = no; then
+	    AC_CHECK_LIB(rt, sched_yield,
+			 [have_librt_sched_yield=yes
+			  ETHR_X_LIBS="$ETHR_X_LIBS -lrt"])
+	fi
+	if test $have_sched_yield = yes || test $have_librt_sched_yield = yes; then
+	    AC_DEFINE(ETHR_HAVE_SCHED_YIELD, 1, [Define if you have the sched_yield() function.])
+	    AC_MSG_CHECKING([whether sched_yield() returns an int])
+	    sched_yield_ret_int=no
+	    AC_TRY_COMPILE([
+				#ifdef ETHR_HAVE_SCHED_H
+				#include <sched.h>
+				#endif
+			   ],
+			   [int sched_yield();],
+			   [sched_yield_ret_int=yes])
+	    AC_MSG_RESULT([$sched_yield_ret_int])
+	    if test $sched_yield_ret_int = yes; then
+		AC_DEFINE(ETHR_SCHED_YIELD_RET_INT, 1, [Define if sched_yield() returns an int.])
+	    fi
+	fi
+
+	have_pthread_yield=no
+	AC_CHECK_FUNC(pthread_yield, [have_pthread_yield=yes])
+	if test $have_pthread_yield = yes; then
+	    AC_DEFINE(ETHR_HAVE_PTHREAD_YIELD, 1, [Define if you have the pthread_yield() function.])
+	    AC_MSG_CHECKING([whether pthread_yield() returns an int])
+	    pthread_yield_ret_int=no
+	    AC_TRY_COMPILE([
+				#if defined(ETHR_NEED_NPTL_PTHREAD_H)
+				#include <nptl/pthread.h>
+				#elif defined(ETHR_HAVE_MIT_PTHREAD_H)
+				#include <pthread/mit/pthread.h>
+				#elif defined(ETHR_HAVE_PTHREAD_H)
+				#include <pthread.h>
+				#endif
+			   ],
+			   [int pthread_yield();],
+			   [pthread_yield_ret_int=yes])
+	    AC_MSG_RESULT([$pthread_yield_ret_int])
+	    if test $pthread_yield_ret_int = yes; then
+		AC_DEFINE(ETHR_PTHREAD_YIELD_RET_INT, 1, [Define if pthread_yield() returns an int.])
+	    fi
+	fi
+
+	have_pthread_rwlock_init=no
+	AC_CHECK_FUNC(pthread_rwlock_init, [have_pthread_rwlock_init=yes])
+	if test $have_pthread_rwlock_init = yes; then
+
+	    ethr_have_pthread_rwlockattr_setkind_np=no
+	    AC_CHECK_FUNC(pthread_rwlockattr_setkind_np,
+			  [ethr_have_pthread_rwlockattr_setkind_np=yes])
+
+	    if test $ethr_have_pthread_rwlockattr_setkind_np = yes; then
+		AC_DEFINE(ETHR_HAVE_PTHREAD_RWLOCKATTR_SETKIND_NP, 1, \
+[Define if you have the pthread_rwlockattr_setkind_np() function.])
+
+		AC_MSG_CHECKING([for PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP])
+		ethr_pthread_rwlock_writer_nonrecursive_initializer_np=no
+		AC_TRY_LINK([
+				#if defined(ETHR_NEED_NPTL_PTHREAD_H)
+				#include <nptl/pthread.h>
+				#elif defined(ETHR_HAVE_MIT_PTHREAD_H)
+				#include <pthread/mit/pthread.h>
+				#elif defined(ETHR_HAVE_PTHREAD_H)
+				#include <pthread.h>
+				#endif
+			    ],
+			    [
+				pthread_rwlockattr_t *attr;
+				return pthread_rwlockattr_setkind_np(attr,
+				    PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP);
+			    ],
+			    [ethr_pthread_rwlock_writer_nonrecursive_initializer_np=yes])
+		AC_MSG_RESULT([$ethr_pthread_rwlock_writer_nonrecursive_initializer_np])
+		if test $ethr_pthread_rwlock_writer_nonrecursive_initializer_np = yes; then
+		    AC_DEFINE(ETHR_HAVE_PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP, 1, \
+[Define if you have the PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP rwlock attribute.])
+		fi
+	    fi
+	fi
+
+	if test "$force_pthread_rwlocks" = "yes"; then
+
+	    AC_DEFINE(ETHR_FORCE_PTHREAD_RWLOCK, 1, \
+[Define if you want to force usage of pthread rwlocks])
+
+	    if test $have_pthread_rwlock_init = yes; then
+		AC_MSG_WARN([Forced usage of pthread rwlocks. Note that this implementation may suffer from starvation issues.])
+	    else
+		AC_MSG_ERROR([User forced usage of pthread rwlock, but no such implementation was found])
+	    fi
+	fi
+
+	AC_CHECK_FUNC(pthread_attr_setguardsize, \
+			AC_DEFINE(ETHR_HAVE_PTHREAD_ATTR_SETGUARDSIZE, 1, \
+[Define if you have the pthread_attr_setguardsize function.]))
+
+	linux_futex=no
+	AC_MSG_CHECKING([for Linux futexes])
+	AC_TRY_LINK([
+			#include <sys/syscall.h>
+			#include <unistd.h>
+			#include <linux/futex.h>
+			#include <sys/time.h>
+		    ],
+		    [
+			int i = 1;
+			syscall(__NR_futex, (void *) &i, FUTEX_WAKE, 1,
+				(void*)0,(void*)0, 0);
+			syscall(__NR_futex, (void *) &i, FUTEX_WAIT, 0,
+				(void*)0,(void*)0, 0);
+			return 0;
+		    ],
+		    linux_futex=yes)
+	AC_MSG_RESULT([$linux_futex])
+	test $linux_futex = yes && AC_DEFINE(ETHR_HAVE_LINUX_FUTEX, 1, [Define if you have a linux futex implementation.])
+
+	AC_CHECK_SIZEOF(int)
+	AC_CHECK_SIZEOF(long)
+	AC_CHECK_SIZEOF(long long)
+	AC_CHECK_SIZEOF(__int128_t)
+
+	if test "$ac_cv_sizeof_int" = "4"; then
+	    int32="int"
+	elif test "$ac_cv_sizeof_long" = "4"; then
+	    int32="long"
+	elif test "$ac_cv_sizeof_long_long" = "4"; then
+	    int32="long long"
+	else
+	    AC_MSG_ERROR([No 32-bit type found])
+	fi
+
+	if test "$ac_cv_sizeof_int" = "8"; then
+	    int64="int"
+	elif test "$ac_cv_sizeof_long" = "8"; then
+	    int64="long"
+	elif test "$ac_cv_sizeof_long_long" = "8"; then
+	    int64="long long"
+	else
+	    AC_MSG_ERROR([No 64-bit type found])
+	fi
+
+	int128=no
+	if test "$ac_cv_sizeof___int128_t" = "16"; then
+	    int128="__int128_t"
+	fi
+
+	ETHR_CHK_SYNC_OP([__sync_val_compare_and_swap], [3], [32], [$int32], AC_DEFINE(ETHR_HAVE___SYNC_VAL_COMPARE_AND_SWAP32, 1, [Define if you have __sync_val_compare_and_swap() for 32-bit integers]))
+	test "$have_sync_op" = "yes" && ethr_have_native_atomics=yes
+	ETHR_CHK_SYNC_OP([__sync_add_and_fetch], [2], [32], [$int32], AC_DEFINE(ETHR_HAVE___SYNC_ADD_AND_FETCH32, 1, [Define if you have __sync_add_and_fetch() for 32-bit integers]))
+	ETHR_CHK_SYNC_OP([__sync_fetch_and_and], [2], [32], [$int32], AC_DEFINE(ETHR_HAVE___SYNC_FETCH_AND_AND32, 1, [Define if you have __sync_fetch_and_and() for 32-bit integers]))
+	ETHR_CHK_SYNC_OP([__sync_fetch_and_or], [2], [32], [$int32], AC_DEFINE(ETHR_HAVE___SYNC_FETCH_AND_OR32, 1, [Define if you have __sync_fetch_and_or() for 32-bit integers]))
+
+	ETHR_CHK_SYNC_OP([__sync_val_compare_and_swap], [3], [64], [$int64], AC_DEFINE(ETHR_HAVE___SYNC_VAL_COMPARE_AND_SWAP64, 1, [Define if you have __sync_val_compare_and_swap() for 64-bit integers]))
+	test "$have_sync_op" = "yes" && ethr_have_native_atomics=yes
+	ETHR_CHK_SYNC_OP([__sync_add_and_fetch], [2], [64], [$int64], AC_DEFINE(ETHR_HAVE___SYNC_ADD_AND_FETCH64, 1, [Define if you have __sync_add_and_fetch() for 64-bit integers]))
+	ETHR_CHK_SYNC_OP([__sync_fetch_and_and], [2], [64], [$int64], AC_DEFINE(ETHR_HAVE___SYNC_FETCH_AND_AND64, 1, [Define if you have __sync_fetch_and_and() for 64-bit integers]))
+	ETHR_CHK_SYNC_OP([__sync_fetch_and_or], [2], [64], [$int64], AC_DEFINE(ETHR_HAVE___SYNC_FETCH_AND_OR64, 1, [Define if you have __sync_fetch_and_or() for 64-bit integers]))
+
+	if test $int128 != no; then
+	    ETHR_CHK_SYNC_OP([__sync_val_compare_and_swap], [3], [128], [$int128], AC_DEFINE(ETHR_HAVE___SYNC_VAL_COMPARE_AND_SWAP128, 1, [Define if you have __sync_val_compare_and_swap() for 128-bit integers]))
+	fi
+
+	AC_MSG_CHECKING([for a usable libatomic_ops implementation])
+	case "x$with_libatomic_ops" in
+	    xno | xyes | x)
+		libatomic_ops_include=
+		;;
+	    *)
+		if test -d "${with_libatomic_ops}/include"; then
+		    libatomic_ops_include="-I$with_libatomic_ops/include"
+		    CPPFLAGS="$CPPFLAGS $libatomic_ops_include"
+		else
+		    AC_MSG_ERROR([libatomic_ops include directory $with_libatomic_ops/include not found])
+		fi;;
+	esac
+	ethr_have_libatomic_ops=no
+	AC_TRY_LINK([#include "atomic_ops.h"],
+		    [
+			volatile AO_t x;
+			AO_t y;
+			int z;
+
+			AO_nop_full();
+			AO_store(&x, (AO_t) 0);
+			z = AO_load(&x);
+			z = AO_compare_and_swap_full(&x, (AO_t) 0, (AO_t) 1);
+		    ],
+		    [ethr_have_native_atomics=yes
+		     ethr_have_libatomic_ops=yes])
+	AC_MSG_RESULT([$ethr_have_libatomic_ops])
+	if test $ethr_have_libatomic_ops = yes; then
+	    AC_CHECK_SIZEOF(AO_t, ,
+			    [
+				#include <stdio.h>
+				#include "atomic_ops.h"
+			    ])
+	    AC_DEFINE_UNQUOTED(ETHR_SIZEOF_AO_T, $ac_cv_sizeof_AO_t, [Define to the size of AO_t if libatomic_ops is used])
+
+	    AC_DEFINE(ETHR_HAVE_LIBATOMIC_OPS, 1, [Define if you have libatomic_ops atomic operations])
+	    if test "x$with_libatomic_ops" != "xno" && test "x$with_libatomic_ops" != "x"; then
+		AC_DEFINE(ETHR_PREFER_LIBATOMIC_OPS_NATIVE_IMPLS, 1, [Define if you prefer libatomic_ops native ethread implementations])
+	    fi
+	    ETHR_DEFS="$ETHR_DEFS $libatomic_ops_include"
+	elif test "x$with_libatomic_ops" != "xno" && test "x$with_libatomic_ops" != "x"; then
+	    AC_MSG_ERROR([No usable libatomic_ops implementation found])
+	fi
+
+	case "$host_cpu" in
+	  sparc | sun4u | sparc64 | sun4v)
+		case "$with_sparc_memory_order" in
+		    "TSO")
+			AC_DEFINE(ETHR_SPARC_TSO, 1, [Define if only run in Sparc TSO mode]);;
+		    "PSO")
+			AC_DEFINE(ETHR_SPARC_PSO, 1, [Define if only run in Sparc PSO, or TSO mode]);;
+		    "RMO"|"")
+			AC_DEFINE(ETHR_SPARC_RMO, 1, [Define if run in Sparc RMO, PSO, or TSO mode]);;
+		    *)
+			AC_MSG_ERROR([Unsupported Sparc memory order: $with_sparc_memory_order]);;
+		esac
+		ethr_have_native_atomics=yes;; 
+	  i86pc | i*86 | x86_64 | amd64)
+		if test "$enable_x86_out_of_order" = "yes"; then
+			AC_DEFINE(ETHR_X86_OUT_OF_ORDER, 1, [Define if x86/x86_64 out of order instructions should be synchronized])
+		fi
+		ethr_have_native_atomics=yes;;
+	  macppc | ppc | "Power Macintosh")
+		ethr_have_native_atomics=yes;;
+	  tile)
+		ethr_have_native_atomics=yes;;
+	  *)
+		;;
+	esac
+
+	test ethr_have_native_atomics = "yes" && ethr_have_native_spinlock=yes
+
+	dnl Restore LIBS
+	LIBS=$saved_libs
+	dnl restore CPPFLAGS
+	CPPFLAGS=$saved_cppflags
+
+	;;
+    *)
+	;;
+esac
+
+AC_MSG_CHECKING([whether default stack size should be modified])
+if test "x$ethr_modified_default_stack_size" != "x"; then
+	AC_DEFINE_UNQUOTED(ETHR_MODIFIED_DEFAULT_STACK_SIZE, $ethr_modified_default_stack_size, [Define if you want to modify the default stack size])
+	AC_MSG_RESULT([yes; to $ethr_modified_default_stack_size kilo words])
+else
+	AC_MSG_RESULT([no])
+fi
+
+if test "x$ETHR_THR_LIB_BASE" != "x"; then
+	ETHR_DEFS="-DUSE_THREADS $ETHR_DEFS"
+	ETHR_LIBS="-l$ethr_lib_name -lerts_internal_r $ETHR_X_LIBS"
+	ETHR_LIB_NAME=$ethr_lib_name
+fi
+
+AC_CHECK_SIZEOF(void *)
+AC_DEFINE_UNQUOTED(ETHR_SIZEOF_PTR, $ac_cv_sizeof_void_p, [Define to the size of pointers])
+
+AC_CHECK_SIZEOF(int)
+AC_DEFINE_UNQUOTED(ETHR_SIZEOF_INT, $ac_cv_sizeof_int, [Define to the size of int])
+AC_CHECK_SIZEOF(long)
+AC_DEFINE_UNQUOTED(ETHR_SIZEOF_LONG, $ac_cv_sizeof_long, [Define to the size of long])
+AC_CHECK_SIZEOF(long long)
+AC_DEFINE_UNQUOTED(ETHR_SIZEOF_LONG_LONG, $ac_cv_sizeof_long_long, [Define to the size of long long])
+AC_CHECK_SIZEOF(__int64)
+AC_DEFINE_UNQUOTED(ETHR_SIZEOF___INT64, $ac_cv_sizeof___int64, [Define to the size of __int64])
+AC_CHECK_SIZEOF(__int128_t)
+AC_DEFINE_UNQUOTED(ETHR_SIZEOF___INT128_T, $ac_cv_sizeof___int128_t, [Define to the size of __int128_t])
+
+
+case X$erl_xcomp_bigendian in
+    X) ;;
+    Xyes|Xno) ac_cv_c_bigendian=$erl_xcomp_bigendian;;
+    *) AC_MSG_ERROR([Bad erl_xcomp_bigendian value: $erl_xcomp_bigendian]);;
+esac
+
+AC_C_BIGENDIAN
+
+if test "$ac_cv_c_bigendian" = "yes"; then
+    AC_DEFINE(ETHR_BIGENDIAN, 1, [Define if bigendian])
+fi
+
+AC_ARG_ENABLE(native-ethr-impls,
+	      AS_HELP_STRING([--disable-native-ethr-impls],
+                             [disable native ethread implementations]),
+[ case "$enableval" in
+    no) disable_native_ethr_impls=yes ;;
+    *)  disable_native_ethr_impls=no ;;
+  esac ], disable_native_ethr_impls=no)
+
+AC_ARG_ENABLE(x86-out-of-order,
+	      AS_HELP_STRING([--enable-x86-out-of-order],
+                             [enable x86/x84_64 out of order support (default disabled)]))
+
+test "X$disable_native_ethr_impls" = "Xyes" &&
+  AC_DEFINE(ETHR_DISABLE_NATIVE_IMPLS, 1, [Define if you want to disable native ethread implementations])
+
+AC_ARG_ENABLE(prefer-gcc-native-ethr-impls,
+	      AS_HELP_STRING([--enable-prefer-gcc-native-ethr-impls],
+			     [prefer gcc native ethread implementations]),
+[ case "$enableval" in
+    yes) enable_prefer_gcc_native_ethr_impls=yes ;;
+    *)  enable_prefer_gcc_native_ethr_impls=no ;;
+  esac ], enable_prefer_gcc_native_ethr_impls=no)
+
+test $enable_prefer_gcc_native_ethr_impls = yes &&
+  AC_DEFINE(ETHR_PREFER_GCC_NATIVE_IMPLS, 1, [Define if you prefer gcc native ethread implementations])
+
+AC_ARG_WITH(libatomic_ops,
+	    AS_HELP_STRING([--with-libatomic_ops=PATH],
+			   [specify and prefer usage of libatomic_ops in the ethread library]))
+
+AC_ARG_WITH(with_sparc_memory_order,
+	    AS_HELP_STRING([--with-sparc-memory-order=TSO|PSO|RMO],
+			   [specify sparc memory order (defaults to RMO)]))
+
+ETHR_X86_SSE2_ASM=no
+case "$GCC-$ac_cv_sizeof_void_p-$host_cpu" in
+  yes-4-i86pc | yes-4-i*86 | yes-4-x86_64 | yes-4-amd64)
+    AC_MSG_CHECKING([for gcc sse2 asm support])
+    save_CFLAGS="$CFLAGS"
+    CFLAGS="$CFLAGS -msse2"
+    gcc_sse2_asm=no
+    AC_TRY_COMPILE([],
+	[
+		long long x, *y;
+		__asm__ __volatile__("movq %1, %0\n\t" : "=x"(x) : "m"(*y) : "memory");
+	],
+	[gcc_sse2_asm=yes])
+    CFLAGS="$save_CFLAGS"
+    AC_MSG_RESULT([$gcc_sse2_asm])
+    if test "$gcc_sse2_asm" = "yes"; then
+      AC_DEFINE(ETHR_GCC_HAVE_SSE2_ASM_SUPPORT, 1, [Define if you use a gcc that supports -msse2 and understand sse2 specific asm statements])
+      ETHR_X86_SSE2_ASM=yes
+    fi
+    ;;
+  *)
+    ;;
+esac
+
+case "$GCC-$host_cpu" in
+  yes-i86pc | yes-i*86 | yes-x86_64 | yes-amd64)
+    gcc_dw_cmpxchg_asm=no
+    AC_MSG_CHECKING([for gcc double word cmpxchg asm support])    
+    AC_TRY_COMPILE([],
+	[
+    char xchgd;
+    long new[2], xchg[2], *p;		  
+    __asm__ __volatile__(
+#if ETHR_SIZEOF_PTR == 4 && defined(__PIC__) && __PIC__
+	"pushl %%ebx\n\t"
+	"movl %8, %%ebx\n\t"
+#endif
+#if ETHR_SIZEOF_PTR == 4
+	"lock; cmpxchg8b %0\n\t"
+#else
+	"lock; cmpxchg16b %0\n\t"
+#endif
+	"setz %3\n\t"
+#if ETHR_SIZEOF_PTR == 4 && defined(__PIC__) && __PIC__
+	"popl %%ebx\n\t"
+#endif
+	: "=m"(*p), "=d"(xchg[1]), "=a"(xchg[0]), "=c"(xchgd)
+	: "m"(*p), "1"(xchg[1]), "2"(xchg[0]), "3"(new[1]),
+#if ETHR_SIZEOF_PTR == 4 && defined(__PIC__) && __PIC__
+	  "r"(new[0])
+#else
+	  "b"(new[0])
+#endif
+	: "cc", "memory");
+
+	],
+	[gcc_dw_cmpxchg_asm=yes])
+    if test $gcc_dw_cmpxchg_asm = no && test $ac_cv_sizeof_void_p = 4; then
+      AC_TRY_COMPILE([],
+	  [
+      char xchgd;
+      long new[2], xchg[2], *p;
+#if !defined(__PIC__) || !__PIC__
+#  error nope
+#endif
+      __asm__ __volatile__(
+    	  "pushl %%ebx\n\t"
+	  "movl (%7), %%ebx\n\t"
+	  "movl 4(%7), %%ecx\n\t"
+	  "lock; cmpxchg8b %0\n\t"
+  	  "setz %3\n\t"
+	  "popl %%ebx\n\t"
+	  : "=m"(*p), "=d"(xchg[1]), "=a"(xchg[0]), "=c"(xchgd)
+	  : "m"(*p), "1"(xchg[1]), "2"(xchg[0]), "3"(new)
+	: "cc", "memory");
+
+	],
+	[gcc_dw_cmpxchg_asm=yes])
+      if test "$gcc_dw_cmpxchg_asm" = "yes"; then
+        AC_DEFINE(ETHR_CMPXCHG8B_REGISTER_SHORTAGE, 1, [Define if you get a register shortage with cmpxchg8b and position independent code])
+      fi
+    fi
+    AC_MSG_RESULT([$gcc_dw_cmpxchg_asm])
+    if test "$gcc_dw_cmpxchg_asm" = "yes"; then
+      AC_DEFINE(ETHR_GCC_HAVE_DW_CMPXCHG_ASM_SUPPORT, 1, [Define if you use a gcc that supports the double word cmpxchg instruction])
+    fi;;
+  *)
+    ;;
+esac
+
+AC_DEFINE(ETHR_HAVE_ETHREAD_DEFINES, 1, \
+[Define if you have all ethread defines])
+
+AC_SUBST(ETHR_X_LIBS)
+AC_SUBST(ETHR_LIBS)
+AC_SUBST(ETHR_LIB_NAME)
+AC_SUBST(ETHR_DEFS)
+AC_SUBST(ETHR_THR_LIB_BASE)
+AC_SUBST(ETHR_THR_LIB_BASE_DIR)
+AC_SUBST(ETHR_X86_SSE2_ASM)
+
+])
+
+
+
+dnl ----------------------------------------------------------------------
+dnl
+dnl ERL_TIME_CORRECTION
+dnl
+dnl In the presence of a high resolution realtime timer Erlang can adapt
+dnl its view of time relative to this timer. On solaris such a timer is
+dnl available with the syscall gethrtime(). On other OS's a fallback
+dnl solution using times() is implemented. (However on e.g. FreeBSD times()
+dnl is implemented using gettimeofday so it doesn't make much sense to
+dnl use it there...) On second thought, it seems to be safer to do it the
+dnl other way around. I.e. only use times() on OS's where we know it will
+dnl work...
+dnl
+
+AC_DEFUN(ERL_TIME_CORRECTION,
+[if test x$ac_cv_func_gethrtime = x; then
+  AC_CHECK_FUNC(gethrtime)
+fi
+if test x$clock_gettime_correction = xunknown; then
+	AC_TRY_COMPILE([#include <time.h>],
+			[struct timespec ts;
+     			 long long result;
+			 clock_gettime(CLOCK_MONOTONIC,&ts);
+                         result = ((long long) ts.tv_sec) * 1000000000LL + 
+			 ((long long) ts.tv_nsec);],
+			clock_gettime_compiles=yes,
+			clock_gettime_compiles=no)
+else
+	clock_gettime_compiles=no
+fi
+			
+
+AC_CACHE_CHECK([how to correct for time adjustments], erl_cv_time_correction,
+[
+case $clock_gettime_correction in
+    yes)
+	erl_cv_time_correction=clock_gettime;;	
+    no|unknown)
+	case $ac_cv_func_gethrtime in
+  	    yes)
+    		erl_cv_time_correction=hrtime ;;
+  	    no)
+    		case $host_os in
+        	    linux*)
+			case $clock_gettime_correction in
+			    unknown)
+				if test x$clock_gettime_compiles = xyes; then
+				    if test X$cross_compiling != Xyes; then
+				    	linux_kernel_vsn_=`uname -r`
+				    	case $linux_kernel_vsn_ in
+					    [[0-1]].*|2.[[0-5]]|2.[[0-5]].*)
+					    	erl_cv_time_correction=times ;;
+					    *)
+					    	erl_cv_time_correction=clock_gettime;;
+				    	esac
+				    else
+					case X$erl_xcomp_linux_clock_gettime_correction in
+					    X)
+						erl_cv_time_correction=cross;;
+					    Xyes|Xno)
+						if test $erl_xcomp_linux_clock_gettime_correction = yes; then
+						    erl_cv_time_correction=clock_gettime
+						else
+					    	    erl_cv_time_correction=times
+						fi;;
+					    *)
+						AC_MSG_ERROR([Bad erl_xcomp_linux_clock_gettime_correction value: $erl_xcomp_linux_clock_gettime_correction]);;
+					esac
+				    fi
+				else
+				    erl_cv_time_correction=times
+				fi
+				;;
+			     *)				
+        			erl_cv_time_correction=times ;;
+			esac
+			;;
+            	    *)
+        		erl_cv_time_correction=none ;;
+    		esac
+    		;;
+	esac
+	;;
+esac
+])
+
+xrtlib=""
+case $erl_cv_time_correction in
+  times)
+    AC_DEFINE(CORRECT_USING_TIMES,[],
+	[Define if you do not have a high-res. timer & want to use times() instead])
+    ;;
+  clock_gettime|cross)
+    if test $erl_cv_time_correction = cross; then
+	erl_cv_time_correction=clock_gettime
+	AC_MSG_WARN([result clock_gettime guessed because of cross compilation])
+    fi
+    xrtlib="-lrt"
+    AC_DEFINE(GETHRTIME_WITH_CLOCK_GETTIME,[1],
+	[Define if you want to use clock_gettime to simulate gethrtime])
+    ;;
+esac
+dnl
+dnl Check if gethrvtime is working, and if to use procfs ioctl
+dnl or (yet to be written) write to the procfs ctl file.
+dnl
+
+AC_MSG_CHECKING([if gethrvtime works and how to use it])
+AC_TRY_RUN([
+/* gethrvtime procfs ioctl test */
+/* These need to be undef:ed to not break activation of
+ * micro level process accounting on /proc/self 
+ */
+#ifdef _LARGEFILE_SOURCE
+#  undef _LARGEFILE_SOURCE
+#endif
+#ifdef _FILE_OFFSET_BITS
+#  undef _FILE_OFFSET_BITS
+#endif
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/signal.h>
+#include <sys/fault.h>
+#include <sys/syscall.h>
+#include <sys/procfs.h>
+#include <fcntl.h>
+
+int main() {
+    long msacct = PR_MSACCT;
+    int fd;
+    long long start, stop;
+    int i;
+    pid_t pid = getpid();
+    char proc_self[30] = "/proc/";
+
+    sprintf(proc_self+strlen(proc_self), "%lu", (unsigned long) pid);
+    if ( (fd = open(proc_self, O_WRONLY)) == -1)
+	exit(1);
+    if (ioctl(fd, PIOCSET, &msacct) < 0)
+	exit(2);
+    if (close(fd) < 0)
+	exit(3);
+    start = gethrvtime();
+    for (i = 0; i < 100; i++)
+	stop = gethrvtime();
+    if (start == 0)
+	exit(4);
+    if (start == stop)
+	exit(5);
+    exit(0); return 0;
+}
+],
+erl_gethrvtime=procfs_ioctl,
+erl_gethrvtime=false,
+[
+case X$erl_xcomp_gethrvtime_procfs_ioctl in
+    X)
+	erl_gethrvtime=cross;;
+    Xyes|Xno)
+	if test $erl_xcomp_gethrvtime_procfs_ioctl = yes; then
+	    erl_gethrvtime=procfs_ioctl
+	else
+	    erl_gethrvtime=false
+	fi;;
+    *)
+	AC_MSG_ERROR([Bad erl_xcomp_gethrvtime_procfs_ioctl value: $erl_xcomp_gethrvtime_procfs_ioctl]);;
+esac
+])
+
+case $erl_gethrvtime in
+  procfs_ioctl)
+	AC_DEFINE(HAVE_GETHRVTIME_PROCFS_IOCTL,[1],
+		[define if gethrvtime() works and uses ioctl() to /proc/self])
+	AC_MSG_RESULT(uses ioctl to procfs)
+	;;
+  *)
+	if test $erl_gethrvtime = cross; then
+	    erl_gethrvtime=false
+	    AC_MSG_RESULT(cross)
+	    AC_MSG_WARN([result 'not working' guessed because of cross compilation])
+	else
+	    AC_MSG_RESULT(not working)
+	fi
+
+	dnl
+	dnl Check if clock_gettime (linux) is working
+	dnl
+
+	AC_MSG_CHECKING([if clock_gettime can be used to get process CPU time])
+	save_libs=$LIBS
+	LIBS="-lrt"
+	AC_TRY_RUN([
+	#include <stdlib.h>
+	#include <unistd.h>
+	#include <string.h>
+	#include <stdio.h>
+	#include <time.h>
+	int main() {
+	    long long start, stop;
+	    int i;
+	    struct timespec tp;
+
+	    if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &tp) < 0)
+	      exit(1);
+	    start = ((long long)tp.tv_sec * 1000000000LL) + (long long)tp.tv_nsec;
+	    for (i = 0; i < 100; i++)
+	      clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &tp);
+	    stop = ((long long)tp.tv_sec * 1000000000LL) + (long long)tp.tv_nsec;
+	    if (start == 0)
+	      exit(4);
+	    if (start == stop)
+	      exit(5);
+	    exit(0); return 0;
+	  }
+	],
+	erl_clock_gettime=yes,
+	erl_clock_gettime=no,
+	[
+	case X$erl_xcomp_clock_gettime_cpu_time in
+	    X) erl_clock_gettime=cross;;
+	    Xyes|Xno) erl_clock_gettime=$erl_xcomp_clock_gettime_cpu_time;;
+	    *) AC_MSG_ERROR([Bad erl_xcomp_clock_gettime_cpu_time value: $erl_xcomp_clock_gettime_cpu_time]);;
+	esac
+	])
+	LIBS=$save_libs
+	case $host_os in
+		linux*)
+			AC_MSG_RESULT([no; not stable])
+			LIBRT=$xrtlib
+			;;
+		*)
+			AC_MSG_RESULT($erl_clock_gettime)
+			case $erl_clock_gettime in
+	  			yes)
+					AC_DEFINE(HAVE_CLOCK_GETTIME,[],
+						  [define if clock_gettime() works for getting process time])
+					LIBRT=-lrt
+					;;
+	  			cross)
+					erl_clock_gettime=no
+					AC_MSG_WARN([result no guessed because of cross compilation])
+					LIBRT=$xrtlib
+					;;
+	  			*)
+					LIBRT=$xrtlib
+					;;
+			esac
+			;;
+	esac
+	AC_SUBST(LIBRT)
+	;;
+esac
+])dnl
+
+dnl ERL_TRY_LINK_JAVA(CLASSES, FUNCTION-BODY
+dnl                   [ACTION_IF_FOUND [, ACTION-IF-NOT-FOUND]])
+dnl Freely inspired by AC_TRY_LINK. (Maybe better to create a 
+dnl AC_LANG_JAVA instead...)
+AC_DEFUN(ERL_TRY_LINK_JAVA,
+[java_link='$JAVAC conftest.java 1>&AC_FD_CC'
+changequote(, )dnl
+cat > conftest.java <<EOF
+$1
+class conftest { public static void main(String[] args) {
+   $2
+   ; return; }}
+EOF
+changequote([, ])dnl
+if AC_TRY_EVAL(java_link) && test -s conftest.class; then
+   ifelse([$3], , :, [rm -rf conftest*
+   $3])
+else
+   echo "configure: failed program was:" 1>&AC_FD_CC
+   cat conftest.java 1>&AC_FD_CC
+   echo "configure: PATH was $PATH" 1>&AC_FD_CC
+ifelse([$4], , , [  rm -rf conftest*
+  $4
+])dnl
+fi
+rm -f conftest*])
+#define UNSAFE_MASK  0xc0000000 /* Mask for bits that must be constant */
+
+
diff --git a/lib/wx/configure.in b/lib/wx/configure.in
index e5dc83b27e..e00d5cba98 100755
--- a/lib/wx/configure.in
+++ b/lib/wx/configure.in
@@ -67,55 +67,14 @@ AC_PROG_RANLIB
 AC_PROG_CPP
 
 AC_MSG_NOTICE(Building for [$host_os])
-MIXED_CYGWIN=no
 WXERL_CAN_BUILD_DRIVER=true
 
-AC_MSG_CHECKING(for mixed cygwin and native VC++ environment)
-if test "X$CC" = "Xcc.sh" -a "X$host" = "Xwin32" -a "x$GCC" != x"yes"; then
-	if test -x /usr/bin/cygpath; then
-		CFLAGS="-Owx"		
-		MIXED_CYGWIN=yes
-		AC_MSG_RESULT([yes])
-		MIXED_CYGWIN_VC=yes
-		CPPFLAGS="$CPPFLAGS -DERTS_MIXED_CYGWIN_VC"
-	else
-		AC_MSG_RESULT([undeterminable])
-		AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!)
-	fi
-else
-	AC_MSG_RESULT([no])
-	MIXED_CYGWIN_VC=no
-fi
-AC_SUBST(MIXED_CYGWIN_VC)
-
-AC_MSG_CHECKING(for mixed cygwin and native MinGW environment)
-if test "X$CC" = "Xcc.sh" -a "X$host" = "Xwin32" -a "x$GCC" = x"yes"; then
-	if test -x /usr/bin/cygpath; then
-		CFLAGS="-O2"
-		MIXED_CYGWIN=yes
-		AC_MSG_RESULT([yes])
-		MIXED_CYGWIN_MINGW=yes
-		CPPFLAGS="$CPPFLAGS -DERTS_MIXED_CYGWIN_MINGW"
-	else
-		AC_MSG_RESULT([undeterminable])
-		AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!)
-	fi
-else
-	AC_MSG_RESULT([no])
-	MIXED_CYGWIN_MINGW=no
-fi
-AC_SUBST(MIXED_CYGWIN_MINGW)
+LM_WINDOWS_ENVIRONMENT
 
-AC_MSG_CHECKING(if we mix cygwin with any native compiler)
-if test "X$MIXED_CYGWIN" = "Xyes" ; then
-	AC_MSG_RESULT([yes])	
-else
-	AC_MSG_RESULT([no])
+if test  X"$MIXED_CYGWIN_VC" == X"yes" -o X"$MIXED_MSYS_VC" == X"yes"; then
+   CFLAGS="-Owx"
 fi
 
-AC_SUBST(MIXED_CYGWIN)
-
-
 ## Check that we are in 32 bits mode on darwin 
 ## (wxWidgets require that it currently uses 32-bits Carbon)
 ## Otherwise skip building wxErlang
@@ -348,7 +307,7 @@ dnl
 if test "$cross_compiling" = "yes"; then
     echo "Cross compilation of the wx driver is not supported yet, wx will NOT be usable" > ./CONF_INFO
     WXERL_CAN_BUILD_DRIVER=false
-elif test X"$MIXED_CYGWIN_VC" != X"yes" ; then
+elif test  X"$MIXED_CYGWIN_VC" == X"no" -a X"$MIXED_MSYS_VC" == X"no"; then
     m4_include(wxwin.m4)
 
     AM_OPTIONS_WXCONFIG
@@ -418,7 +377,11 @@ define(wx_warn_text,[
 else
     AC_MSG_CHECKING(for wxWidgets in standard locations)
 		  
-    CWXWIN_CONFIG=`cygpath $wx_config_name 2>/dev/null`
+    if test "x$MIXED_MSYS" = "xyes"; then
+        CWXWIN_CONFIG=`win2msys_path.sh $wx_config_name 2>/dev/null`
+    else
+	CWXWIN_CONFIG=`cygpath $wx_config_name 2>/dev/null`
+    fi
     CWXWIN1=`dirname $CWXWIN_CONFIG 2>/dev/null`
     CWXWIN2=`dirname $CWXWIN1 2>/dev/null`
 
@@ -426,10 +389,24 @@ else
        PROGRAMFILES=c:/Program Files
     fi
 
-    CWXWIN_PROG=`cygpath -d "$PROGRAMFILES" | cygpath -f - 2>/dev/null`
+    
+    if test "x$MIXED_MSYS" = "xyes"; then
+        CWXWIN_PROG=`win2msys_path.sh "$PROGRAMFILES" 2>/dev/null`
+    else
+	CWXWIN_PROG=`cygpath -d "$PROGRAMFILES" | cygpath -f - 2>/dev/null`
+    fi
     CWXWIN3=$CWXWIN_PROG/wxWidgets-2.8
     CWXWIN4=$CWXWIN_PROG/wxMSW-2.8
     CWX_DOCUMENTED="/opt/local/pgm/wxMSW-2.8.* /opt/local/pgm/wxWidgets-2.8.*"
+    case $ac_cv_sizeof_void_p in
+    	 8)
+		CWX_DOCUMENTED="/opt/local64/pgm/wxMSW-2.8.* /opt/local64/pgm/wxWidgets-2.8.* $CWX_DOCUMENTED"
+		;;
+         *)
+		true
+		;;
+    esac	
+			
     CWXPATH="$CWXWIN1 $CWXWIN2 $CWX_DOCUMENTED $CWXWIN3.* $CWXWIN4.*"
 
     for dir in $CWXPATH; do
@@ -438,11 +415,11 @@ else
 	    WXINCLUDE_PLAIN=$dir/include
 	    WXINCLUDE_CONTRIB=$dir/contrib/include
 	    WX_CFLAGS="-EHsc -D_UNICODE -DUNICODE -I$WXINCLUDE_MSVC -I$WXINCLUDE_PLAIN -I$WXINCLUDE_CONTRIB -D__WXMSW__"
-	    WX_CXXFLAGS=$WX_CFLAGS
+	    WX_CXXFLAGS="-TP $WX_CFLAGS"
 	    WX_LIBDIR=$dir/lib/vc_lib
 	    WX_RESCOMP="rc.sh -I$WXINCLUDE_PLAIN -D __WIN32__"
 	    RC_FILE_TYPE=res
-	    for lib in $WX_LIBDIR/wxbase*.lib; do
+	    for lib in $WX_LIBDIR/wxbase*.lib $WX_LIBDIR2/wxbase*.lib; do
 		maybe=`echo $lib | egrep 'wxbase[[0-9]]*u\.lib'`
 		if test '!' -z "$maybe"; then
 		   corelib_number=`echo $maybe | sed 's,.*\([[0-9]].\)u\.lib,\1,'`
@@ -576,7 +553,7 @@ AC_CHECK_HEADERS([wx/stc/stc.h],
         [],
     	[WXERL_CAN_BUILD_DRIVER=false
 	 echo "wxWidgets don't have wxStyledTextControl (stc.h), wx will NOT be useable" > ./CONF_INFO
-     	 AC_MSG_WARN([Can not find wx/stc/stc.h])      
+     	 AC_MSG_WARN([Can not find wx/stc/stc.h $CXXFLAGS])      
      	],
 	[#ifdef WIN32
 	 # include <windows.h>