dnl
dnl Process this file with autoconf to produce a configure script.
dnl

AC_PREREQ([2.50])

dnl VARIABLES EXPORTED
dnl
dnl ARCH
dnl
dnl DefHeapSpace= Default DB space
dnl DefStackSpace= Default global+local
dnl DefTrailSpace= Default trail
dnl
dnl  ENVIRONMENT to run YAP before Install is complete
dnl PRE_INSTALL_ENV= prefix to run YAP after libYap.so and yap are available
dnl    but before make install
dnl INSTALL_ENV= prefix to run YAP while doing make install
dnl
dnl EXEC_SUFFIX=suffix for executable (.exe)
dnl
dnl INSTALL_DLLS= we can do dynamic linking
dnl SO= suffix for loadable binary (.so,.dll,.o)
dnl MERGE_DLL_OBJS= we need to merge several .o files into a single dll.
dnl
dnl CXXFLAGS= C++-flags
dnl SHLIB_FLAGS= C-flags used to compile a file that will be loaded dynamically
dnl DO_SECOND_LD= call a separate dll ld
dnl YAPLIB_LD= construct libYap.DLL
dnl SHLIB_LD= dll ld (C)
dnl SHLIB_CXX_LD= dll ld (C++)
dnl SHLIB_CFLAGS= cflags to use when constructing a DLL
dnl SHLIB_CXXCFLAGS= c++flags to use when constructing a DLL
dnl YAPLIB_CFLAGS=flags to construct libYap
dnl EXTRA_LIBS_FOR_DLLS= libs that are required when lding a so
dnl EXTRA_LIBS_FOR_SWIDLLS= libs that are required when lding a SWI so


AC_INIT(YAP, 6.3.4, yap-users@sf.net, yap )

DOC_VERSION=4.2.9

AC_ARG_WITH(sysroot,
	[ --with-sysroot[=DIR]           set sysroot in compiler],
	  [   SYSROOT="$withval"
		CPPFLAGS="$CPPFLAGS --sysroot=$SYSROOT"
		CFLAGS="$CFLAGS --sysroot=$SYSROOT"
		CXXFLAGS="$CXXFLAGS --sysroot=$SYSROOT"
		LDFLAGS="$LDFLAGS --sysroot=$SYSROOT" ],
	[])

AC_PROG_CC
AC_PROG_CPP
AC_PROG_CXX
AC_CHECK_TOOL([RC], [windres], [:])

# if we are trying to use -m32 in a WIN32/mingw setup then
# we cannot trust lpthread
# we cannot trust RC
AC_ARG_ENABLE(abi,
	[ --enable-abi           support an ABI ],
	[ CC="$CC -m$enableval"; CPP="$CPP -m$enableval"; CXX="$CXX -m$enableval"; RCFLAGS="--output-format=coff --target=pe-i386" ; pthreadlib="`pwd`/pthreadGC2.dll"; win_abi="$enableval"    ] , win_abi=no )

AC_CONFIG_HEADER(config.h)
AC_CONFIG_HEADER(YapTermConfig.h)

dnl store the environments compilation flags
mycflags="$CFLAGS"

AC_PROG_AWK
AC_SUBST(GCC)
AC_SUBST(RC)
AC_SUBST(RCFLAGS)
AC_SUBST(C_INTERF_FLAGS)
AC_SUBST(C_PARSER_FLAGS)
AC_LANG(C)

AC_CANONICAL_SYSTEM

dnl includes _POSIX_C_SOURCE=200809
AC_MSG_CHECKING(_XOPEN_SOURCE)
AC_CACHE_VAL(ac_cv_xopen,
      [AC_TRY_COMPILE([
      #define _XOPEN_SOURCE 700
      #include <unistd.h>
],
[],
                   [ac_cv_xopen=true],
                   [ac_cv_xopen=false])])
if test "$ac_cv_xopen" = true; then
   AC_DEFINE(_XOPEN_SOURCE, 700, [Define if _XOPEN_SOURCE is needed])
     AC_MSG_RESULT(yes)	       
else
    AC_MSG_RESULT(no)
fi


AC_MSG_CHECKING(_FILE_OFFSET_BITS)
AC_CACHE_VAL(ac_cv_file_offset_bits,
      [AC_TRY_COMPILE([
      #define _FILE_OFFSET_BITS
      #include <unistd.h>
],
[],
                   [ac_cv_file_offset_bits=true],
                   [ac_cv_file_offset_bits=false])])
if test "$ac_cv_file_offset_bits" = true; then
   AC_DEFINE(_FILE_OFFSET_BITS, 64, [Define if _FILE_OFFSET_BITS is needed])
     AC_MSG_RESULT(yes)	       
else
    AC_MSG_RESULT(no)
fi

AC_MSG_CHECKING(_ISOC99_SOURCE)
AC_CACHE_VAL(ac_cv_isoc99_source,
      [AC_TRY_COMPILE([
      #define _ISOC99_SOURCE
      #include <unistd.h>
],
[],
                   [ac_cv_isoc99_source=true],
                   [ac_cv_isoc99_source=false])])
if test "$ac_cv_isoc99_source" = true; then
   AC_DEFINE(_ISOC99_SOURCE, 1, [Define if _ISOC99_SOURCE is needed])
     AC_MSG_RESULT(yes)	       
else
    AC_MSG_RESULT(no)
fi

dnl AC_MSG_CHECKING(_ISOC11_SOURCE)
dnl AC_CACHE_VAL(ac_cv_isoc11_source,
dnl       [AC_TRY_COMPILE([
dnl       #define _ISOC11_SOURCE
dnl       #include <unistd.h>
dnl ],
dnl [],
dnl                    [ac_cv_isoc11_source=true],
dnl                    [ac_cv_isoc11_source=false])])
dnl if test "$ac_cv_isoc11_source" = true; then
dnl    AC_DEFINE(_ISOC11_SOURCE, 1, [Define if _ISOC11_SOURCE is needed])
dnl      AC_MSG_RESULT(yes)	       
dnl else
dnl     AC_MSG_RESULT(no)
dnl fi

if test "$yap_cv_minisat" = no -a "$INSTALL_DLLS" = "no"
then
  PKG_MINISAT=""
else
  PKG_MINISAT="packages/swi-minisat2 packages/swi-minisat2/C"
fi

AC_DEFINE_UNQUOTED(HOST_ALIAS,"${target}",[what is the configure host name])

m4_define([HAS_TOP])

AC_DEFUN([AX_SPLIT_VERSION],[
    AC_REQUIRE([AC_PROG_SED])
    YAP_VERSION="$PACKAGE_VERSION"
    YAP_MAJOR_VERSION=`echo "$PACKAGE_VERSION" | $SED 's/\([[^.]][[^.]]*\).*/\1/'`
    YAP_MINOR_VERSION=`echo "$PACKAGE_VERSION" | $SED 's/[[^.]][[^.]]*.\([[^.]][[^.]]*\).*/\1/'`
    YAP_POINT_VERSION=`echo "$PACKAGE_VERSION" | $SED 's/[[^.]][[^.]]*.[[^.]][[^.]]*.\(.*\)/\1/'`
    AC_MSG_CHECKING([Major version])
    AC_MSG_RESULT([$YAP_MAJOR_VERSION])
    AC_MSG_CHECKING([Minor version])
    AC_MSG_RESULT([$YAP_MINOR_VERSION])
    AC_MSG_CHECKING([Point version])
    AC_MSG_RESULT([$YAP_POINT_VERSION])
])

AX_SPLIT_VERSION

case "$target_cpu" in
    i*86*)
     YAP_TARGET=i386
    ;;
    x86*)
      YAP_TARGET=amd64
    ;;
    sparc*)
      YAP_TARGET=sparc
    ;;
    *)
      YAP_TARGET=unknown
    ;;
 esac
 
 
dnl Check for nullptr (bug 626472)
AC_LANG_CPLUSPLUS
AC_MSG_CHECKING(for nullptr)
AC_CACHE_VAL(ac_cv_nullptr,
      [AC_TRY_COMPILE([],
                    [int* foo = nullptr;],
                   [ac_cv_nullptr=true],
                   [ac_cv_nullptr=false])])
if test x"$ac_cv_nullptr" = xtrue -o 0$_MSC_VER -ge 01600; then
    AC_DEFINE(HAVE_NULLPTR, [], [c++ nullptr support])
    AC_MSG_RESULT(yes)
else
    AC_MSG_RESULT(no)
fi
 
AC_LANG_C 

dnl hardware/engine
AC_DEFINE(MSHIFTOFFS, 1, [compiler should shift offsets.])
AC_DEFINE(ALIGN_LONGS, 1, [longs should be in addresses that are multiple of four.])
# AC_DEFINE(LOW_ABSMI, 1, [absmi located at initial addresses, unused.])


AC_ARG_ENABLE(tabling,
	[ --enable-tabling           support tabling ],
	tabling="$enableval", tabling=yes)
AC_ARG_ENABLE(or-parallelism,
	[ --enable-or-parallelism    support or-parallelism as: copy,sba,a-cow,threads ],
	orparallelism="$enableval", orparallelism=no)
AC_ARG_ENABLE(depth-limit,
	[ --enable-depth-limit       support depth-bound computation ],
	depthlimit="$enableval", depthlimit=yes)
AC_ARG_ENABLE(wam-profile,
	[ --enable-wam-profile       support low level profiling of abstract machine ],
	wamprofile="$enableval", wamprofile=no)
AC_ARG_ENABLE(low-level-tracer,
	[ --enable-low-level-tracer  support support for procedure-call tracing ],
	lowleveltracer="$enableval", lowleveltracer=no)
AC_ARG_ENABLE(threads,
	[ --enable-threads           support system threads ],
	threads="$enableval", threads=no)
AC_ARG_ENABLE(pthread-locking,
	[ --enable-pthread-locking   use pthread locking primitives for internal locking (requires threads)  ],
	pthreadlocking="$enableval", pthreadlocking=yes)
AC_ARG_ENABLE(max-performance,
	[ --enable-max-performance   try using the best flags for specific architecture ],
	maxperformance="$enableval", maxperformance=no)
AC_ARG_ENABLE(max-memory,
	[ --enable-max-memory        try using the best flags for using the memory to the most ],
	maxmemory="$enableval", maxmemory=yes)
AC_ARG_ENABLE(debug-yap,
	[ --enable-debug-yap         enable C-debugging for YAP ],
	debugyap="$enableval", debugyap=no)
AC_ARG_ENABLE(eam,
	[ --enable-eam               enable EAM on YAP ],
	eam="$enableval", eam=no)
AC_ARG_ENABLE(cygwin,
	[ --enable-cygwin            use cygwin library in WIN32 ],
	cygwin="$enableval", cygwin=no)
AC_ARG_ENABLE(prism,
	[ --enable-prism            use PRISM system in YAP ],
	prism="$enableval", prism=yes)
AC_ARG_ENABLE(dynamic_loading,
	[ --enable-dynamic-loading   compile YAP as a DLL ],
	dynamic_loading="$enableval", dynamic_loading=no)
AC_ARG_ENABLE(static_compilation,
	[ --enable-static-compilation   compile YAP statically ],
	static_compilation="$enableval", static_compilation=no)
AC_ARG_ENABLE(use-malloc,
	[ --enable-use-malloc        use malloc to allocate memory ],
	use_malloc="$enableval", use_malloc=yes)
AC_ARG_ENABLE(condor,
	[ --enable-condor            allow YAP to be used from condor ],
	use_condor="$enableval", use_condor=no)
AC_ARG_ENABLE(april,
	[ --enable-april             compile Yap to support April ILP system],
	use_april="$enableval", use_april=no)

AC_ARG_ENABLE(dlcompat,
	[ --enable-dlcompat          use dlcompat library for dynamic loading on Mac OS X],
	use_dlcompat="$enableval", use_dlcompat=no)

AC_ARG_ENABLE(horus,
	[ --enable-horus           enable CLPBN HORUS library.  ],
	yap_cv_horus="$enableval", yap_cv_horus=yes)

AC_ARG_WITH(gmp,
	[ --with-gmp[=DIR]           use GNU Multiple Precision in DIR],
	if test "$withval" = yes; then
		yap_cv_gmp=yes
		GMPDIR=/usr
	elif test "$withval" = no; then
		yap_cv_gmp=no
	else
		yap_cv_gmp="$with_gmp"
		GMPDIR="$with_gmp"
		LDFLAGS="$LDFLAGS -L${yap_cv_gmp}/lib"
		LIBS="$LIBS -L${yap_cv_gmp}/lib"
		CPPFLAGS="$CPPFLAGS -I${yap_cv_gmp}/include"
	    CFLAGS="$CFLAGS -I${yap_cv_gmp}/include"
	    CXXFLAGS="$CXXFLAGS -I${yap_cv_gmp}/include"
	fi,
	[yap_cv_gmp=yes])

AC_ARG_WITH(judy,
	[  --with-judy[=DIR] UDI needs judy library],
	if test "$withval" = yes; then
	    yap_cv_judy=yes
	elif test "$withval" = no; then
	    yap_cv_judy=no
	else
	    yap_cv_judy=$withval
	fi,
	[yap_cv_judy=yes])

AC_ARG_WITH(minisat,
	[ --enable-minisat           use minisat interface],
	if test "$withval" = yes; then
		yap_cv_minisat=yes
	elif test "$withval" = no; then
		yap_cv_minisat=no
	else
		yap_cv_minisat="$GXX"
	fi,
	[yap_cv_minisat=yes])

AC_ARG_WITH(java,
    [ --with-java=JAVA_HOME       use JPL with Java setup in JAVA_HOME],
	if test "$withval" = yes; then
		yap_cv_java=yes
		dynamic_loading=yes
		maxmemory=yes
dnl		threads=yes
	elif test "$withval" = no; then
		yap_cv_java=no
	else
		yap_cv_java=$with_java
		dynamic_loading=yes
		maxmemory=yes
dnl		threads=yes
	fi,
	[yap_cv_java=no])

AC_ARG_WITH(readline,
	[ --with-readline[=DIR]      use GNU Readline Library in DIR],
	if test "$withval" = yes; then
		yap_cv_readline=yes
	elif test "$withval" = no; then
		yap_cv_readline=no
	else
		yap_cv_readline=$with_readline
		if test -d "${yap_cv_readline}/lib64" -a "$YAP_TARGET" = amd64; then
		  LDFLAGS="-L${yap_cv_readline}/lib64 -L${yap_cv_readline}/lib $LDFLAGS"
                else
		  LDFLAGS="-L${yap_cv_readline}/lib $LDFLAGS"
		fi
		CPPFLAGS="-I${yap_cv_readline}/include $CPPFLAGS"
	fi,
	[yap_cv_readline=yes])

AC_ARG_WITH(heap-space,
	[ --with-heap-space[=space]  default heap size in Kbytes],
	if test "$withval" = yes; then
		yap_cv_heap_space=0
	elif test "$withval" = no; then
		yap_cv_heap_space=0
	else
		yap_cv_heap_space=$withval
	fi,
	[yap_cv_heap_space=0])

AC_ARG_WITH(stack-space,
	[ --with-stack-space[=space] default stack size in Kbytes],
	if test "$withval" = yes; then
		yap_cv_stack_space=0
	elif test "$withval" = no; then
		yap_cv_stack_space=0
	else
		yap_cv_stack_space=$withval
	fi,
	[yap_cv_stack_space=0])

AC_ARG_WITH(trail-space,
	[ --with-trail-space[=space] default trail size in Kbytes],
	if test "$withval" = yes; then
		yap_cv_trail_space=0
	elif test "$withval" = no; then
		yap_cv_trail_space=0
	else
		yap_cv_trail_space=$withval
	fi,
	[yap_cv_trail_space=0])

AC_ARG_WITH(max-workers,
	[ --with-max-workers[=integer] maximum number of or-parallel processes],
	if test "$withval" = yes; then
	  yap_cv_max_workers="(8*SIZEOF_INT_P)"
	elif test "$withval" = no; then
	  yap_cv_max_workers="1"
	else
	  yap_cv_max_workers=$withval
	fi,
	[yap_cv_max_workers="(8*SIZEOF_INT_P)"])

AC_ARG_WITH(max-threads,
	[ --with-max-threads[=integer] maximum number of or-parallel processes],
	if test "$withval" = yes; then
	  yap_cv_max_threads="1024"
	elif test "$withval" = no; then
	  yap_cv_max_threads="1"
	else
	  yap_cv_max_threads=$withval
	fi,
	[yap_cv_max_threads="1024"])

  AC_DEFINE(MinHeapSpace, (2048*SIZEOF_INT_P), [at least 2M Cells for Heap])
  AC_DEFINE(MinStackSpace,(1024*SIZEOF_INT_P), [at least 1M Cells for Stack])
  AC_DEFINE(MinTrailSpace,(256*SIZEOF_INT_P), [at least 1/2M Cells for Trail])
if test "$orparallelism" = threads
then
  orparallelism="yes"
  threads="yes"
fi

if test "$orparallelism" = copy || test "$orparallelism" = yes -a "$threads" = no
then
  orparallelism="copy"
  use_malloc="no"
elif test "$orparallelism" != no
then
  tabling="no"
fi

if test "$orparallelism" != no
then
  AC_DEFINE_UNQUOTED(MAX_WORKERS,$yap_cv_max_workers,[maximum amount of or-parallelism])
else
  AC_DEFINE(MAX_WORKERS,1)
fi

AC_DEFINE_UNQUOTED(DefHeapSpace,$yap_cv_heap_space, [Default Heap Space.])
AC_DEFINE_UNQUOTED(DefStackSpace,$yap_cv_stack_space, [Default Global+Local Space.])
AC_DEFINE_UNQUOTED(DefTrailSpace,$yap_cv_trail_space, [Default Trail Space.])

if test "$threads" = no
then
  yap_cv_max_threads=1
fi
 AC_DEFINE_UNQUOTED(MAX_THREADS,$yap_cv_max_threads,[max number of threads, default 1 or 1024])


if test "$yap_cv_prism" = no
then
  INSTALL_PRISM=""
else
  INSTALL_PRISM="packages/prism/src/c packages/prism/src/prolog"
fi

if test "$yap_cv_horus"="yes"; then
  AC_LANG_PUSH([C++])
  my_save_cxxflags="$CXXFLAGS"
  CXXFLAGS=-std=c++0x
  AC_MSG_CHECKING([whether CXX supports -std-c++0x])
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
    [AC_MSG_RESULT([yes])],
    [AC_MSG_RESULT([no])]
    [yap_cv_horus=no]
  )
  CXXFLAGS="$my_save_cxxflags"
  AC_LANG_POP()
fi

if test "$yap_cv_horus" = no
then
  PKG_CLPBN="packages/CLPBN"
else
  PKG_CLPBN="packages/CLPBN packages/CLPBN/horus"
fi



dnl condor universe does not like dynamic linking on Linux, DEC, and HP-UX platforms.
if test "$use_condor" = yes
then
  static_compilation="yes"
  use_malloc="yes"
  CC="condor_compile $CC"
  CXX="condor_compile $CXX"
  dnl no readline with condor.
  yap_cv_readline="no"
  AC_DEFINE(SUPPORT_CONDOR, 1, [enable condor distributed execution, static compilation])
  dnl and it disables minisat
  yap_cv_minisat=no
  STATIC_MODE=""
else
  static_compilation="no"
  STATIC_MODE="# "
fi

AC_CHECK_DECL(__clang_major__, CLANG=yes, CLANG=no)

dnl Compilation Flags

if test "$GCC" = "yes"
then
     if test "$debugyap" = "yes"
     then
       CXXFLAGS="-O -g -Wall $CXXFLAGS"
       C_INTERF_FLAGS="-O -g -Wall -Wstrict-prototypes -Wmissing-prototypes $CFLAGS"
       CFLAGS="-O -g -Wall -Wstrict-prototypes -Wmissing-prototypes $CFLAGS"
     else
       CXXFLAGS="-O3 -fomit-frame-pointer -Wall $CXXFLAGS"
       C_INTERF_FLAGS="-O3 -Wall -Wstrict-prototypes -Wmissing-prototypes $CFLAGS"
       C_PARSER_FLAGS="-O3 -Wall -Wstrict-prototypes -Wmissing-prototypes $CFLAGS"
       CFLAGS="-O3 -fomit-frame-pointer -Wall -Wstrict-prototypes -Wmissing-prototypes $CFLAGS"
       case "`$CC --version < /dev/null`" in
	  gcc-3.4*)
	    CFLAGS="-fno-gcse -fno-crossjumping $CFLAGS"
	  ;;
       esac
       case "$target_cpu" in
        i*86*)
           CFLAGS="-DBP_FREE $CFLAGS"
           CXXFLAGS="-DBP_FREE $CXXFLAGS"
        ;;
        sparc*)
	  case "$target_os" in
           *solaris[2-9]*)	dnl
             CFLAGS="-mno-app-regs -DOPTIMISE_ALL_REGS_FOR_SPARC=1 $CFLAGS"
             CXXFLAGS="-mno-app-regs -DOPTIMISE_ALL_REGS_FOR_SPARC=1 $CXXFLAGS"
            ;;
          esac
        ;;
       esac
       if test "$tcpu"; then
          target_cpu=$tcpu
       fi
       if test "$maxperformance" = "yes"
       then
         case "$target_cpu" in
	  athlon)
           CFLAGS="-march=athlon $CFLAGS"
           CXXFLAGS="-march=athlon $CXXFLAGS"
	  ;;
          i686*)
           CFLAGS="-march=i686 $CFLAGS"
           CXXFLAGS="-march=i686 $CXXFLAGS"
          ;;
          i586*)
           CFLAGS="-march=i586 $CFLAGS"
           CXXFLAGS="-march=i586 $CXXFLAGS"
          ;;
          i486*)
           CFLAGS="-march=i486 $CFLAGS"
           CXXFLAGS="-march=i486 $CXXFLAGS"
          ;;
         esac
       fi
   fi
   if test "$CC" = "sslittle-na-sstrix-gcc"
   then
    RANLIB="sslittle-na-sstrix-ranlib"
    AR="sslittle-na-sstrix-ar"
    PRE_INSTALL_ENV="sim-fast"
    INSTALL_ENV="sim-fast"
   fi
else
     case "$target_cpu" in
       i?86*)
        if test "$CC" = "lcc"
        then
          CFLAGS="-A -A $CFLAGS"
        elif test "$CC" = "cl"
        then
          CXXFLAGS="-/nologo $CXXFLAGS"
          CFLAGS="/nologo $CFLAGS"
          CPP="/nologo /E"
        fi
        ;;
       hppa*)
        if test "$CC" = "cc" -o $CC = c89
         then
           if test "$debugyap" = "yes"
           then
             CXXFLAGS="-Ae -g -O $CXXFLAGS"
             CFLAGS="-Ae -g -O $CFLAGS"
           else
             CXXFLAGS="-Ae +O3 +Onolimit  $CXXFLAGS"
             CFLAGS="-Ae +O3 +Onolimit $CFLAGS"
           fi
        fi
dnl	LDFLAGS="+e UserCPredicate $LDFLAGS"
        ;;
     esac
   C_INTERF_FLAGS="$CFLAGS"
   C_PARSER_FLAGS="$CFLAGS"
fi

dnl Checks for programs.
AC_PROG_LN_S
AC_PROG_INSTALL
AC_PROG_RANLIB
AC_CHECK_TOOL(AR,[ar],:)
AC_PATH_PROG(INSTALL_INFO,install-info,true,$PATH:/sbin:/usr/sbin:/usr/etc:/usr/local/sbin)
dnl do this before windows.h
AC_CHECK_HEADERS(winsock.h winsock2.h windows.h Shlobj.h )
AC_PATH_PROG(SHELL,sh)
AC_CHECK_TOOL([INDENT], [indent], [:])

dnl Check for libraries.
dnl mingw does not get along well with libm
dnl cygnus and mingw32 also need wsock32 to use sockets.
dnl
i_am_cross_compiling=$cross_compiling
if test "$target_os" = "cygwin"  -o "$target_os" = "mingw32"  -o "$target_os" = "mingw64"
then
  INSTALL_COMMAND=install_win32
  EXTRA_INCLUDES_FOR_WIN32="-I\$(srcdir)/packages/PLStream/windows"
  if test "$cygwin" = "no" -o "$target_os" = "mingw32"
  then
    # locale complaints without this.
    if test "$threads" = yes; then
      if test $win_abi = 32; then
        LIBS="$LIBS $pthreadlib"
      else
        AC_CHECK_LIB(pthread, main)
      fi
    fi
    AC_CHECK_LIB(mscrt,main)
    if test "$target_cpu" = x86_64; then
      YAP_TARGET=amd64
      AC_CHECK_LIB(ws2_32,main)
      AC_CHECK_LIB(comdlg32,main)
      AC_CHECK_LIB(shell32,main)
      EXTRA_LIBS_FOR_DLLS="-lws2_32"
    elif test "$target_os" = "cygwin"; then
      CC="${CC}  -mno-cygwin"
      CXX="${CXX}  -mno-cygwin"
      AC_CHECK_LIB(comdlg32,main)
      AC_CHECK_LIB(wsock32,main)
      AC_CHECK_LIB(shell32,main)
    else
      AC_CHECK_LIB(wsock32,main)
      AC_CHECK_LIB(comdlg32,main)
      AC_CHECK_LIB(shell32,main)
    fi
    AC_DEFINE(__WINDOWS__, 1, [compiling for Windows])
    EXTRA_LIBS_FOR_DLLS="\$(abs_top_builddir)/yap.dll $EXTRA_LIBS_FOR_DLLS"
    AC_CHECK_LIB(psapi,main)
    yap_cv_readline=no
    if test "$prefix" = "NONE"
    then
      #mingw64
      case "$build_os" in
      *linux*)
        if test "${WINEPREFIX}x" = x
        then
           SYSTEMDRIVE=$HOME/.wine/drive_c
        else
	   SYSTEMDRIVE="$WINEPREFIX"
        fi
        if test "$target_cpu" = "x86_64"
        then
         prefix="$SYSTEMDRIVE/Yap64"
        else
          prefix="$SYSTEMDRIVE/Yap"
        fi
	i_am_cross_compiling=yes
	PRE_INSTALL_ENV="wine "
 	;;
      **)
      if test "$target_cpu" = "x86_64"
      then
        prefix="\${SYSTEMDRIVE}/Yap64"
      else
        prefix="\${SYSTEMDRIVE}/Yap"
      fi
       ;;
      esac
    fi
    WINDOWS=""
    PKG_WINCONSOLE="swi/console"
  else
    WINDOWS="#"
    PKG_WINCONSOLE=""
    LIBS="-lcygwin"
    EXTRA_LIBS_FOR_DLLS="\$(abs_top_builddir)/yap.dll"
    EXTRA_INCLUDES_FOR_WIN32="-I\$(srcdir)/packages/PLStream/windows"
    AC_CHECK_LIB(pthread,pthread_create)
  fi
else
  if test "$prefix" = "NONE" -a x"$SYSROOT" = x
  then
    prefix=/usr/local
  fi
  if test -d "${prefix}/lib64" -a "$YAP_TARGET" = amd64
  then
     LDFLAGS="$LDFLAGS -L${prefix}/lib64"
  fi
  if test x"$SYSROOT" = x
  then
    LDFLAGS="$LDFLAGS -L${prefix}/lib"
    CPPFLAGS="$CPPFLAGS -I${prefix}/include"
  fi
  if test "$exec_prefix" != "NONE" -a "$exec_prefix" != "$prefix"
  then
     if test -d "${exec_prefix}/lib64" -a "$YAP_TARGET" = amd64; then
       LDFLAGS="$LDFLAGS -L${exec_prefix}/lib64"
     fi
     LDFLAGS="$LDFLAGS -L${exec_prefix}/lib"
  fi
  INSTALL_COMMAND="install_unix"
  WINDOWS="#"
  PKG_WINCONSOLE=""
  case "$host" in
		*android*)
		   AC_CHECK_LIB(android,main)
		   AC_CHECK_LIB(log,main)
			;;
			**)
       STARTUP_ANDROID="x"
       STARTUP_DEFAULT=""
			;;
  esac
  AC_CHECK_LIB(m,sin)
  AC_CHECK_LIB(socket,socket)
  dnl X/Open Networking is sometimes a separate library
  AC_CHECK_LIB(xnet,getsockname)
  AC_CHECK_LIB(stdc++,main)
  AC_CHECK_LIB(nsl,main,
	have_nsl=yes
	,
	have_nsl=no)
  AC_CHECK_LIB(crypt,main)
  AC_CHECK_LIB(nss_files,main)
  AC_CHECK_LIB(nss_dns,main)
  AC_CHECK_LIB(resolv,main)
  AC_CHECK_LIB(pthread,pthread_create)
fi

if test "$yap_cv_gmp" != "no"
then
  AC_CHECK_LIB(gmp,main)
fi

if test "$yap_cv_judy" != "no"; then
	AC_CHECK_LIB(Judy, Judy1Set,,[AC_MSG_RESULT([libJudy not found, UDI will only work with one Index at a time])])
fi

if test "$threads" = yes
then
  AC_CHECK_HEADERS(pthread.h)
  AC_CHECK_FUNCS(pthread_mutexattr_setkind_np pthread_mutexattr_settype pthread_setconcurrency)
  if test "$pthreadlocking" = yes
  then
    AC_DEFINE(USE_PTHREAD_LOCKING, 1, [do not use our own locking routines])
  fi
  use_malloc=yes
fi

if test ! -z "$GCC"; then
    COFLAGS="${COFLAGS--O2 -cc-options,-fno-strict-aliasing}"
    CWFLAGS="${CWFLAGS--Wall}"
else
    COFLAGS="${COFLAGS--O}"
    CWFLAGS="${CWFLAGS-}"
fi
CMFLAGS=-fpic
CIFLAGS=-I.

dnl Packages

if test "$use_prism" = no; then
  PKG_PRISM=""
else
  PKG_PRISM="packages/prism/src/c packages/prism/src/prolog"
fi
AC_SUBST(PKG_PRISM)

if test -e "$srcdir"/packages/archive/Makefile.in
 then
  PKG_LIBARCHIVE="packages/archive"
else
  PKG_LIBARCHIVE=""
fi

if test -e "$srcdir"/packages/odbc/Makefile.in
then
  PKG_ODBC="packages/odbc"
else
  PKG_ODBC=""
fi

if test "$use_chr" = no
then
  PKG_CHR=""
elif test -e "$srcdir"/packages/chr/Makefile.in
then
  PKG_CHR="packages/chr"
else
  PKG_CHR=""
fi

if test "$use_clpqr" = no
then
  PKG_CLPQR=""
elif test -e "$srcdir"/packages/clpqr/Makefile.in
then
  PKG_CLPQR="packages/clpqr"
else
  PKG_CLPQR=""
fi

if test -e "$srcdir"/packages/clib/Makefile.in
then
  PKG_CLIB="packages/clib/maildrop/rfc2045 packages/clib/maildrop/rfc822 packages/clib"
else
  PKG_CLIB=""
fi

if test -e "$srcdir"/packages/http/Makefile.in
then
  PKG_HTTP="packages/http"
else
  PKG_HTTP=""
fi

if test -e "$srcdir"/packages/plunit/Makefile.in
then
  PKG_PLUNIT="packages/plunit"
else
  PKG_PLUNIT=""
fi

if test -e "$srcdir"/packages/R/Makefile.in
then
  PKG_R="packages/R"
else
  PKG_R=""
fi

if test -e "$srcdir"/packages/raptor/Makefile.in
then
  ENABLE_RAPTOR="packages/raptor"
else
  ENABLE_RAPTOR=""
fi

if test -e "$srcdir"/packages/RDF/Makefile.in
then
  PKG_RDF="packages/RDF"
else
  PKG_RDF=""
fi

if test -e "$srcdir"/packages/semweb/Makefile.in
then
  PKG_SEMWEB="packages/semweb"
else
  PKG_SEMWEB=""
fi

if test -e "$srcdir"/packages/sgml/Makefile.in
then
  PKG_SGML="packages/sgml"
else
  PKG_SGML=""
fi

if test -e "$srcdir"/packages/zlib/Makefile.in
then
  PKG_ZLIB="packages/zlib"
else
  PKG_ZLIB=""
fi

dnl --enable-new-dtags seems to enable the use of --runpath
dnl instead of --rpath.

if test "$static_compilation" = "no"
then
  OLDLDFLAGS="$LDFLAGS"
  LDFLAGS="$LDFLAGS -Wl,--enable-new-dtags"
  AC_MSG_CHECKING([whether ld supports --enable-new-dtags])
  AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
    [AC_MSG_RESULT([yes])],
    [AC_MSG_RESULT([no])
     LDFLAGS="$OLDLDFLAGS"]
  )
fi


	if test "$cross_compiling" = "yes"
	then
	  YAP_EXTRAS=""
	else
	  AC_SYS_RESTARTABLE_SYSCALLS
	fi

	dnl defaults
	INSTALL_DLLS="no"
	EXTRA_OBJS=""
	SHLIB_LD="#"
	SHLIB_CXX_LD="#"
	DO_SECOND_LD="#"
	M4="m4"
	MERGE_DLL_OBJS="#"
	IN_UNIX=""

	dnl This has to be before $target_os
	YAPLIB="libYap.a"

	dnl now this is where things get nasty.
	dnl trying to get the libraries
	
	case "$target_os" in
	      *linux*)
	        if test "$static_compilation" = "no"
	        then
		  AC_CHECK_LIB(dl,dlopen,
		     have_dl=yes
		   ,
		     have_dl=no)
	          if test "$have_dl" = "yes"
		  then
		    SO="so"
                    SOPATH="LD_LIBRARY_PATH"
	            SHLIB_LD="$CC -shared -export-dynamic"
	            SHLIB_CXX_LD="$CXX -shared -export-dynamic"
	            DO_SECOND_LD=""
		    LIBS="$LIBS -ldl"
		    case "$target_cpu" in
		      alpha*)
		        LDFLAGS="-dynamic $LDFLAGS"
	              ;;
	              *)
		        if test "$CC" != "lcc"
	                then
		          LDFLAGS="-rdynamic $LDFLAGS"
	                fi
	              ;;
	            esac
	          fi
		  if test "$ac_cv_prog_gcc" = "yes"
		  then
		   SHLIB_CFLAGS="-shared -fPIC $CFLAGS"
		   SHLIB_CXXFLAGS="-shared -fPIC $CXXFLAGS"
		   INSTALL_DLLS="yes"
	      fi
		  LDFLAGS="$LDFLAGS -L\$(abs_top_builddir) -Wl,-R\$(LIBDIR) -Wl,-R,\$(YAPLIBDIR)"
	      DYNYAPLIB=libYap."$SO"."$YAP_VERSION"
	      EXTRAYAPLIBS="libYap.$SO libYap.$SO.$YAP_MAJOR_VERSION"
	      SONAMEFLAG="-Wl,-soname=libYap.$SO.$YAP_MAJOR_VERSION"
	     fi
	     if test "$have_nsl" = yes
		 then
		    LIBS="$LIBS -lnsl"
	     fi
	        if test "$dynamic_loading" = "yes"
	        then
	           YAPLIB_LD="\$(CC) -shared"
	           EXTRA_LIBS_FOR_DLLS="$EXTRA_LIBS_FOR_DLLS -L\$(abs_top_builddir) -lYap -Wl,-rpath=\$(YAPLIBDIR) -Wl,-rpath=\$(LIBDIR)"
	           INSTALL_ENV="LD_LIBRARY_PATH=:\$(DESTDIR)\$(LIBDIR):\$(DESTDIR)\$(YAPLIBDIR): YAPSHAREDIR=\$(DESTDIR)\$(SHAREDIR) YAPLIBDIR=\$(DESTDIR)\$(YAPLIBDIR)"
	        else
	           YAPLIB_LD="\$(CC)"
	           EXTRA_LIBS_FOR_DLLS="$EXTRA_LIBS_FOR_DLLS -Wl,-R,\$(YAPLIBDIR) -Wl,-R,\$(LIBDIR)"
	           INSTALL_ENV="YAPSHAREDIR=\$(DESTDIR)\$(SHAREDIR) YAPLIBDIR=\$(DESTDIR)\$(YAPLIBDIR)"
	        fi
	        PRE_INSTALL_ENV="LD_LIBRARY_PATH=\$(abs_top_builddir):\$(abs_top_builddir)/library/system:$LD_LIBRARY_PATH $PRE_INSTALL_ENV"
		;;
	      *sunos4*)
		    M4="/usr/5bin/m4"
		    LDFLAGS="$LDFLAGS -N"
	        if test "$have_nsl" = yes
		    then
		      LIBS="$LIBS -lnsl"
	        fi
	        SO="o"
		    INSTALL_DLLS="yes"
		    LDFLAGS="$LDFLAGS -L\$(abs_top_builddir) -Wl,-R,\$(LIBDIR) -Wl,-R,\$(YAPLIBDIR)"
	        DYNYAPLIB=libYap."$SO"
		    SONAMEFLAG=""
	        EXTRA_LIBS_FOR_DLLS="$EXTRA_LIBS_FOR_DLLS -L\$(abs_top_builddir) -lYap -Wl,-R,\$(YAPLIBDIR) -Wl,-R,\$(LIBDIR)"
	        PRE_INSTALL_ENV="LD_LIBRARY_PATH=\$(abs_top_builddir):\$(abs_top_builddir)/library/system:$LD_LIBRARY_PATH  $PRE_INSTALL_ENV"
	        INSTALL_ENV="LD_LIBRARY_PATH=\$(DESTDIR)\$(LIBDIR):\$(DESTDIR)\$(YAPLIBDIR): YAPSHAREDIR=\$(DESTDIR)\$(SHAREDIR) YAPLIBDIR=\$(DESTDIR)\$(YAPLIBDIR)"
		;;
	      *hpux*)
		#do not use the first memory quadrant
		AC_DEFINE(FORCE_SECOND_QUADRANT, 1, [old HP-UX VM magic, should be irrelevant now])
		M4="/usr/bin/m4"
		if test ${use_condor} = no
	        then
		  SHLIB_INTERFACE="load_shl.o"
		  if test "$CC" = cc -o "$CC" = c89
		  then
		    #this tells ld to export all non-static symbols,
		    #otherwise no external predicates.
	            SHLIB_LD="$CC -shared -export-dynamic"
	            SHLIB_CXX_LD="$CXX -shared -export-dynamic"
	            DO_SECOND_LD=""
	            SO="sl"
	    SHLIB_CFLAGS="+z $CFLAGS"
	    SHLIB_CXXFLAGS="+z $CXXFLAGS"
	    INSTALL_DLLS="yes"
	    # If the xnet library was found, turn on X/Open networking
	    if test "$ac_cv_lib_xnet_getsockname" = yes
	    then
	     AC_DEFINE(_XOPEN_SOURCE, 1, [HP-UX old socket stuff])
	     AC_DEFINE(_XOPEN_SOURCE_EXTENDED, 1, [HP-UX old socket stuff])
	    fi
	  else
	    INSTALL_DLLS="no"
          fi
        fi
	if test ${target_os} = hpux10.20
	then
	  AC_DEFINE(MPI_AVOID_REALLOC,1,[o not use realloc() from HP-UX 10.20 together with MPI])
	fi
	LDFLAGS="$LDFLAGS -L\$(abs_top_builddir) -Wl,-R,\$(LIBDIR) -Wl,-R,\$(YAPLIBDIR)"
        DYNYAPLIB=libYap."$SO"
	SONAMEFLAG=""
        EXTRA_LIBS_FOR_DLLS="$EXTRA_LIBS_FOR_DLLS -L\$(abs_top_builddir) -lYap -Wl,-R,\$(YAPLIBDIR) -Wl,-R,\$(LIBDIR)"
        PRE_INSTALL_ENV="LD_LIBRARY_PATH=\$(abs_top_builddir) YAPLIBDIR=\$(abs_top_builddir):\$(abs_top_builddir)/library/system  $PRE_INSTALL_ENV"
        INSTALL_ENV="LD_LIBRARY_PATH=\$(DESTDIR)\$(LIBDIR):\$(DESTDIR)\$(YAPLIBDIR): YAPSHAREDIR=\$(DESTDIR)\$(SHAREDIR) YAPLIBDIR=\$(DESTDIR)\$(YAPLIBDIR)"
	;;
      *aix*)
	# To actually use dlls in AIX I'd need to build YAP as a DLL first.
	# I won't bother for now.
	#
        # SO="a"
        #SHLIB_LD="\$(srcdir)/../../ldAix /bin/ld -bhalt:4 -bM:SRE -bE:lib.exp -H512 -T512 -bnoentry"
	#INSTALL_DLLS="yes"
	LDFLAGS="$LDFLAGS -L\$(abs_top_builddir) -Wl,-R,\$(LIBDIR) -Wl,-R,\$(YAPLIBDIR)"
        DYNYAPLIB=libYap."$SO"
	SONAMEFLAG=""
        EXTRA_LIBS_FOR_DLLS="$EXTRA_LIBS_FOR_DLLS -L\$(abs_top_builddir) -lYap -Wl,-R,\$(YAPLIBDIR) -Wl,\$(LIBDIR)"
        PRE_INSTALL_ENV="LD_LIBRARY_PATH=\$(abs_top_builddir):\$(abs_top_builddir)/library/system:$LD_LIBRARY_PATH  $PRE_INSTALL_ENV"
        INSTALL_ENV="LD_LIBRARY_PATH=\$(DESTDIR)\$(LIBDIR):\$(DESTDIR)\$(YAPLIBDIR): YAPSHAREDIR=\$(DESTDIR)\$(SHAREDIR) YAPLIBDIR=\$(DESTDIR)\$(YAPLIBDIR)"
	;;
      *osf*)
        if ${use_condor} = no
        then
	  AC_CHECK_LIB(dl,dlopen,
dnl Linux has both elf and a.out, in this case we found elf
	     have_dl=yes
	   ,
	     have_dl=no)
          SO="so"
          SOPATH="LD_LIBRARY_PATH"
          SHLIB_LD="ld -shared -expect_unresolved '*'"
          DO_SECOND_LD=""
        fi
	LDFLAGS="$LDFLAGS -L\$(abs_top_builddir) -Wl,-R,\$(LIBDIR) -Wl,-R,\$(YAPLIBDIR)"
        DYNYAPLIB=libYap."$SO"
	SONAMEFLAG=""
        EXTRA_LIBS_FOR_DLLS="$EXTRA_LIBS_FOR_DLLS -L\$(abs_top_builddir) -lYap -Wl,-R,\$(YAPLIBDIR) -Wl,-R,\$(LIBDIR)"
        PRE_INSTALL_ENV="LD_LIBRARY_PATH=\$(abs_top_builddir):\$(abs_top_builddir)/library/system:$LD_LIBRARY_PATH  $PRE_INSTALL_ENV"
        INSTALL_ENV="LD_LIBRARY_PATH=\$(DESTDIR)\$(LIBDIR):\$(DESTDIR)\$(YAPLIBDIR): YAPSHAREDIR=\$(DESTDIR)\$(SHAREDIR) YAPLIBDIR=\$(DESTDIR)\$(YAPLIBDIR)"
	;;
      *irix6*)
	SHLIB_CFLAGS="$CFLAGS"
	SHLIB_CXXFLAGS="$CXXFLAGS"
	SO="so"
        SOPATH="LD_LIBRARY_PATH"
        DO_SECOND_LD=""
	SHLIB_LD="ld -n32 -shared -rdata_shared"
        SHLIB_CXX_LD="$SHLIB_LD"
	INSTALL_DLLS="yes"
	LDFLAGS="$LDFLAGS -L\$(abs_top_builddir) -Wl,-R,\$(LIBDIR) -Wl,-R,\$(YAPLIBDIR)"
        DYNYAPLIB=libYap."$SO"
	SONAMEFLAG=""
        EXTRA_LIBS_FOR_DLLS="$EXTRA_LIBS_FOR_DLLS -L\$(abs_top_builddir) -lYap -Wl,-R,\$(YAPLIBDIR) -Wl,-R,\$(LIBDIR)"
        PRE_INSTALL_ENV="LD_LIBRARY_PATH=\$(abs_top_builddir):\$(abs_top_builddir)/library/system:$LD_LIBRARY_PATH  $PRE_INSTALL_ENV"
        INSTALL_ENV="LD_LIBRARY_PATH=\$(DESTDIR)\$(LIBDIR):\$(DESTDIR)\$(YAPLIBDIR): YAPSHAREDIR=\$(DESTDIR)\$(SHAREDIR) YAPLIBDIR=\$(DESTDIR)\$(YAPLIBDIR)"
	;;
      *darwin*)
	if test ${use_dlcompat} = yes
	then
	  AC_CHECK_LIB(dl,dlopen,
	     have_dl=yes
	   ,
	     have_dl=no)
	  if test ${have_dl} = yes
	  then
	    LIBS="$LIBS -ldl"
	  fi
	fi
	SO="dylib"
        SOPATH="DYLD_LIBRARY_PATH"
        DO_SECOND_LD=""
        if test "$dynamic_loading" = "yes"
        then
	       SHLIB_LD="$CC  -dynamiclib"
           SHLIB_CXX_LD="$CXX  -dynamiclib"
           EXTRA_LIBS_FOR_DLLS="-L\$(abs_top_builddir) $LIBS $EXTRA_LIBS_FOR_DLLS -lYap   -Wl,-install_name,\$(YAPLIBDIR)/\$@"
           INSTALL_ENV="DYLD_LIBRARY_PATH=\$(DESTDIR)\$(LIBDIR):\$(DESTDIR)\$(YAPLIBDIR): YAPSHAREDIR=\$(DESTDIR)\$(SHAREDIR) YAPLIBDIR=\$(DESTDIR)\$(YAPLIBDIR)"
	   LDFLAGS="-L\$(abs_top_builddir) $LDFLAGS "
        else
	   SHLIB_LD="$CC  -dynamiclib -Wl,-undefined,dynamic_lookup"
           SHLIB_CXX_LD="$CXX  -dynamiclib -Wl,-undefined,dynamic_lookup"
           EXTRA_LIBS_FOR_DLLS="$EXTRA_LIBS_FOR_DLLS   -Wl,-install_name,\$(YAPLIBDIR)/\$@"
           INSTALL_ENV="YAPSHAREDIR=\$(DESTDIR)\$(SHAREDIR) YAPLIBDIR=\$(DESTDIR)\$(YAPLIBDIR)"
        fi
	if test "$ac_cv_prog_gcc" = "yes"
	then
	   if test "$CLANG" = "yes"
	   then
	     SHLIB_CFLAGS="-fPIC $CFLAGS"
	     SHLIB_CXXFLAGS="-fPIC $CXXFLAGS"
	   else
	     SHLIB_CFLAGS="-shared -fPIC $CFLAGS"
	     SHLIB_CXXFLAGS="-shared -fPIC $CXXFLAGS"
	   fi
	   INSTALL_DLLS="yes"
        fi
        CC="$CC -fstrict-aliasing -freorder-blocks -fsched-interblock -Wall"
        DYNYAPLIB=libYap."$YAP_VERSION.$SO"
	    SONAMEFLAG="-Wl,-install_name,$prefix/lib/libYap.$YAP_MAJOR_VERSION.$SO -Wl,-compatibility_version,$YAP_MAJOR_VERSION.$YAP_MINOR_VERSION -Wl,-current_version,$YAP_VERSION"
        YAPLIB_LD="$CC -dynamiclib"
        PRE_INSTALL_ENV="DYLD_LIBRARY_PATH=\$(abs_top_builddir):\$(abs_top_builddir)/library/system:$DYLD_LIBRARY_PATH  $PRE_INSTALL_ENV"
        EXTRAYAPLIBS="libYap.$SO libYap.$YAP_MAJOR_VERSION.$SO"
	;;
      *netbsd*|*openbsd*|*freebsd*|*dragonfly*)
	if echo __ELF__ | ${CC:-cc} -E - | grep -q __ELF__
        then
	  #an a.out system
	  SHLIB_CFLAGS="$CFLAGS"
	  SHLIB_CXXFLAGS="$CXXFLAGS"
	  SO="o"
          SOPATH="LD_AOUT_LIBRARY_PATH"
        else
	  #an elf system
	  LDFLAGS="-Wl,--export-dynamic $LDFLAGS"
	  SHLIB_CFLAGS="-fPIC $CFLAGS"
	  SHLIB_CXXFLAGS="-fPIC $CXXFLAGS"
	  SHLIB_LD="$CC -shared -export-dynamic"
          SHLIB_CXX_LD="$CXX -shared -export-dynamic"
          DO_SECOND_LD=""
	  SO="so"
          SOPATH="LD_LIBRARY_PATH"
	  INSTALL_DLLS="yes"
        fi
	LDFLAGS="$LDFLAGS -L\$(abs_top_builddir) -Wl,-R,\$(LIBDIR)"
        DYNYAPLIB=libYap."$SO"
        YAPLIB_LD=$SHLIB_LD
        SONAMEFLAG="-Wl,--soname=$DYNYAPLIB"
        EXTRA_LIBS_FOR_DLLS="$EXTRA_LIBS_FOR_DLLS -L\$(abs_top_builddir) -Wl,-R,\$(YAPLIBDIR)"
        PRE_INSTALL_ENV="LD_LIBRARY_PATH=\$(abs_top_builddir):\$(abs_top_builddir)/library/system:$LD_LIBRARY_PATH  $PRE_INSTALL_ENV"
        INSTALL_ENV="LD_LIBRARY_PATH=\$(DESTDIR)\$(LIBDIR):\$(DESTDIR)\$(YAPLIBDIR): YAPSHAREDIR=\$(DESTDIR)\$(SHAREDIR) YAPLIBDIR=\$(DESTDIR)\$(YAPLIBDIR)"
	;;
      *solaris*)
       #an elf system
        LDFLAGS="-dynamic $LDFLAGS"
	SHLIB_CFLAGS="-fPIC $CFLAGS"
	SHLIB_CXXFLAGS="-fPIC $CXXFLAGS"
	SHLIB_LD="$CC -shared"
        SHLIB_CXX_LD="$CXX -shared"
        DO_SECOND_LD=""
	SO="so"
        SOPATH="LD_LIBRARY_PATH"
	INSTALL_DLLS="yes"
	LDFLAGS="$LDFLAGS -L\$(abs_top_builddir) -Wl,-R,\$(LIBDIR) -Wl,-R,\$(YAPLIBDIR)"
        DYNYAPLIB=libYap."$SO"
	SONAMEFLAG="-Wl,--soname=$DYNYAPLIB"
        if test "$dynamic_loading" = "yes"
        then
           YAPLIB_LD="\$(CC)"
           EXTRA_LIBS_FOR_DLLS="$EXTRA_LIBS_FOR_DLLS -L\$(abs_top_builddir) -lYap -Wl,-R,\$(YAPLIBDIR) -Wl,-R,\$(LIBDIR)"
           PRE_INSTALL_ENV="LD_LIBRARY_PATH=\$(abs_top_builddir):\$(abs_top_builddir)/library/system:$LD_LIBRARY_PATH  $PRE_INSTALL_ENV"
           INSTALL_ENV="LD_LIBRARY_PATH=\$(DESTDIR)\$(LIBDIR):\$(DESTDIR)\$(YAPLIBDIR): YAPSHAREDIR=\$(DESTDIR)\$(SHAREDIR) YAPLIBDIR=\$(DESTDIR)\$(YAPLIBDIR)"
        else
           EXTRA_LIBS_FOR_DLLS="$EXTRA_LIBS_FOR_DLLS -Wl,-R,\$(YAPLIBDIR) -Wl,-R,\$(LIBDIR)"
           YAPLIB_LD="\$(CC) -shared"
           INSTALL_ENV="YAPSHAREDIR=\$(DESTDIR)\$(SHAREDIR) YAPLIBDIR=\$(DESTDIR)\$(YAPLIBDIR)"
        fi
	;;
      *cyg*|*mingw*|*msys*)
	# gcc on cygwin seems to have trouble with longjmp
        # and -fomit-frame-point -DBP_FREE
	YAPLIB="yap.dll"
	DYNYAPLIB="yap.dll"
	SONAMEFLAG=""
	SHLIB_CFLAGS="$CFLAGS"
	SHLIB_CXXFLAGS="$CXXFLAGS"
        if test "$target_win64" = no
        then
	  LDFLAGS="-Wl,--large-address-aware $LDFLAGS"
        fi
        SHLIB_LD="\$(CC) -shared -Wl,--export-all-symbols"
        SHLIB_CXX_LD="\$(CXX) -shared -Wl,--export-all-symbols"
	SO="dll"
        SOPATH="PATH"
	C_PARSER_FLAGS="$C_INTERF_FLAGS"
	EXEC_SUFFIX=".exe"
	INSTALL_DLLS="yes"
	DO_SECOND_LD=""
	MERGE_DLL_OBJS=""
        IN_UNIX="#"
        YAPLIB_LD="\$(CC) -shared -Wl,--export-all-symbols"
        INSTALL_ENV="YAPSHAREDIR=\$(DESTDIR)\$(SHAREDIR) YAPLIBDIR=\$(DESTDIR)\$(YAPLIBDIR)"
	;;
      *)
	AC_CHECK_LIB(dl,dlopen,
	   have_dl=yes
	 ,
	   have_dl=no)
        if test "$have_dl" = yes
	 then
         SO="o"
         SOPATH="LD_LIBRARY_PATH"
	 LIBS="$LIBS -ldl"
	 INSTALL_DLLS="yes"
	 if test "$GCC" = "yes"
	 then
	   SHLIB_CXXFLAGS="-fPIC $CXXFLAGS"
	 fi
        fi
        if test "$have_nsl" = yes
	 then
	 LIBS="$LIBS -lnsl"
        fi
	LDFLAGS="$LDFLAGS -L\$(abs_top_builddir) -Wl,-R,\$(LIBDIR) -Wl,-R,\$(YAPLIBDIR)"
        DYNYAPLIB=libYap."$SO"
	SONAMEFLAG=""
        EXTRA_LIBS_FOR_DLLS="$EXTRA_LIBS_FOR_DLLS -L\$(abs_top_builddir) -lYap -Wl,-R,\$(YAPLIBDIR) -Wl,-R,\$(LIBDIR)"
        PRE_INSTALL_ENV="LD_LIBRARY_PATH=\$(abs_top_builddir):\$(abs_top_builddir)/library/system:$LD_LIBRARY_PATH  $PRE_INSTALL_ENV"
        INSTALL_ENV="LD_LIBRARY_PATH=\$(DESTDIR)\$(LIBDIR):\$(DESTDIR)\$(YAPLIBDIR): YAPSHAREDIR=\$(DESTDIR)\$(SHAREDIR) YAPLIBDIR=\$(DESTDIR)\$(YAPLIBDIR)"
	;;
esac

dnl use the current files, even if older
PRE_INSTALL_ENV="YAPLIBDIR=\$(abs_top_builddir):\$(abs_top_builddir)/library/system:\$(abs_top_builddir)/packages/clib $PRE_INSTALL_ENV "

if test "$dynamic_loading" = "yes"
then
  YAPLIB_CFLAGS="$SHLIB_CFLAGS"
  YAPLIB="$DYNYAPLIB"
else
  YAPLIB_CFLAGS="$CFLAGS"
fi

YAP_EXTRAS="$YAP_EXTRAS -DCOROUTINING=1 -DRATIONAL_TREES=1"

if test "$tabling" = yes
then
  YAP_EXTRAS="$YAP_EXTRAS -DTABLING=1"
fi

if test "$debugyap" = "yes"
then
  YAP_EXTRAS="$YAP_EXTRAS -DDEBUG=1"
fi

if test "$eam" = "yes"
then
  YAP_EXTRAS="$YAP_EXTRAS -DBEAM"
fi

if test "$wamprofile" = "yes"
then
  YAP_EXTRAS="$YAP_EXTRAS -DANALYST=1"
fi

if test "$depthlimit" = "yes"
then
  YAP_EXTRAS="$YAP_EXTRAS -DDEPTH_LIMIT=1"
fi

if test "$use_april" = "yes"
then
   YAP_EXTRAS="$YAP_EXTRAS -DDEPTH_LIMIT=1 -DAPRIL"
   LDFLAGS="$LDFLAGS -L."
   LIBS="$LIBS -lApril"
fi

if test "$lowleveltracer" = "yes"
then
  YAP_EXTRAS="$YAP_EXTRAS -DLOW_LEVEL_TRACER=1"
fi

if test "$threads" = "yes"
then
  YAP_EXTRAS="$YAP_EXTRAS -DTHREADS=1"
  if test "$GCC" = "yes"
  then
    YAP_EXTRAS="$YAP_EXTRAS -D_GNU_SOURCE"
  fi
  case "$orparallelism" in
    sba|a-cow|copy)
      AC_MSG_FAILURE(
                   [--or-parallelism=$orparallelism incompatible with threads]
      )
    ;;
    yes)
     YAP_EXTRAS="$YAP_EXTRAS -DYAPOR_THREADS=1"
    ;;
  esac
else
  case "$orparallelism" in
    sba)
      YAP_EXTRAS="$YAP_EXTRAS -DYAPOR_SBA=1"
    ;;
    a-cow)
      YAP_EXTRAS="$YAP_EXTRAS -DYAPOR_COW=1"
    ;;
    copy)
     YAP_EXTRAS="$YAP_EXTRAS -DYAPOR_COPY=1"
    ;;
  esac
fi

AC_SUBST(INSTALL_ENV)
AC_SUBST(PRE_INSTALL_ENV)

dnl Checks for header files.
AC_HEADER_STDBOOL
dnl check stdlib, stdarg, string, float
AC_HEADER_STDC
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS(arpa/inet.h alloca.h crtdbg.h crypt.h)
AC_CHECK_HEADERS(ctype.h direct.h dirent.h dlfcn.h)
AC_CHECK_HEADERS(errno.h execinfo.h fcntl.h fenv.h)
AC_CHECK_HEADERS(float.h fpu_control.h ieeefp.h inttypes.h io.h limits.h)
AC_CHECK_HEADERS(malloc.h math.h memory.h)
AC_CHECK_HEADERS(netdb.h netinet/in.h netinet/tcp.h pwd.h regex.h shlobj.h)
AC_CHECK_HEADERS(siginfo.h signal.h stdarg.h  stdbool.h)
AC_CHECK_HEADERS(stdint.h string.h stropts.h)
AC_CHECK_HEADERS(sys/conf.h sys/dir.h sys/file.h)
AC_CHECK_HEADERS(sys/mman.h sys/ndir.h sys/param.h)
AC_CHECK_HEADERS(sys/resource.h sys/select.h)
AC_CHECK_HEADERS(sys/shm.h sys/socket.h sys/stat.h)
AC_CHECK_HEADERS(sys/time.h sys/times.h sys/types.h)
AC_CHECK_HEADERS(sys/ucontext.h sys/un.h sys/wait.h)
AC_CHECK_HEADERS(time.h ucontext.h unistd.h utime.h)
AC_CHECK_HEADERS(wctype.h)
AC_CHECK_HEADERS(zlib.h zutil.h)
AC_CHECK_HEADERS(mach-o/dyld.h LibLoaderAPI.h)

if test "$yap_cv_readline" != "no"
then
  AC_CHECK_LIB([ncurses], [main],[
		LIBS="-lncurses $LIBS"
              ])
 	AC_CHECK_LIB([readline], [main],[
  	AC_CHECK_HEADERS( readline/readline.h)
  	AC_CHECK_HEADERS( readline/history.h )
  	if test "x$ac_cv_header_readline_readline_h" = xyes
  	then
    		AC_DEFINE([HAVE_LIBREADLINE], [1], [Define if you have libreadline])
		LIBS="-lreadline $LIBS"
        AC_CHECK_TYPES([rl_hook_func_t, rl_completion_func_t], [], [], [
        					[#include <stdio.h>]
                        [#include <readline/readline.h>]
                        ] )
  		AC_CHECK_FUNCS( rl_completion_matches rl_clear_pending_input rl_reset_after_signal )
	  	AC_CHECK_FUNCS( rl_filename_completion_function rl_free_line_state rl_insert_close )
 	    AC_CHECK_FUNCS( rl_set_prompt rl_free_line_state rl_insert_close add_history )
 	 	AC_CHECK_FUNCS( rl_begin_undo_group rl_discard_argument rl_set_keyboard_input_timeout )
 	 	AC_CHECK_DECLS( [ rl_event_hook, rl_catch_signals , rl_readline_state, rl_done ], [], [], [
 	 	                 [#include <stdio.h>]
 	 	                 [#include <readline/readline.h>]
 	 	                 ] )
  	else
   		yap_cv_readline=no
   		 AC_MSG_RESULT( [test for readline failed])
  	fi
   	           ],
              [
                 AC_MSG_RESULT( [test for readline failed])
              ]
           )
fi

if test "$yap_cv_gmp" != "no"
then
  AC_CHECK_HEADERS(gmp.h)
  if test "x$ac_cv_header_gmp_h" = xyes -a  "x$ac_cv_lib_gmp_main" = xyes
  then
    AC_DEFINE(USE_GMP, 1, [use bignums/rationals in YAP code.])
  fi
fi

if test "$yap_cv_judy" != "no"; then
  AC_CHECK_HEADERS(Judy.h)
  if test "x$ac_cv_header_Judy_h" = xyes -a "x$ac_cv_lib_Judy_Judy1Set" = xyes
  then
    AC_DEFINE(USE_JUDY, 1, [use Judy library for UDI indexing in YAP code.])
  fi
fi


dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_INLINE
AC_STRUCT_TM
AC_CHECK_SIZEOF(int *,4)
AC_CHECK_SIZEOF(short int,2)
AC_CHECK_SIZEOF(int,4)
AC_CHECK_SIZEOF(long int,4)
AC_CHECK_SIZEOF(long long int,8)
AC_CHECK_SIZEOF(float,4)
AC_CHECK_SIZEOF(double,8)
AC_CHECK_SIZEOF(void *,4)

AC_DEFINE_UNQUOTED(CELLSIZE, $ac_cv_sizeof_void_p, [size of a cell in bytes.])

dnl check whether int64_t exists
AC_MSG_CHECKING(whether int64_t is defined)
AC_CACHE_VAL(yap_cv_int64_t_defined,[
AC_TRY_RUN(
	#include <stdint.h>
	int main() {
	   int64_t i;
	   return 0;
	}
	,
	yap_cv_int64_t_defined=yes,yap_cv_int64_t_defined=no,yap_cv_int64_t_defined=no)])
AC_MSG_RESULT($yap_cv_int64_t_defined)
if test $yap_cv_int64_t_defined = yes
then
  AC_DEFINE_UNQUOTED(INT64_T_DEFINED,1,[type of int64_t])
fi
AC_MSG_CHECKING(for int64_t)
AC_SUBST(INT64_T_DEFINED)

dnl check type of malloc (i.e. char *  or void *)
AC_MSG_CHECKING(for type of malloc)
AC_CACHE_VAL(yap_cv_malloct,[
AC_TRY_RUN(
	#include <stdlib.h>
	char *malloc(size_t);
	int main() {
	   void *p=malloc(1);
	   return 0;
	}
	,
	yap_cv_malloct=char,yap_cv_malloct=void,yap_cv_malloct=void)])
AC_MSG_RESULT($yap_cv_malloct *)
if test "$yap_cv_malloct" = void
then AC_DEFINE_UNQUOTED(MALLOC_T,void *,[malloc_t])
else AC_DEFINE_UNQUOTED(MALLOC_T,char *,[malloc_t])
fi


dnl check how to generate headers (i.e. should we use GCC inline?)
AC_MSG_CHECKING(for gcc inline)
AC_CACHE_VAL(yap_cv_gcc,[
AC_TRY_RUN(
	#undef inline
	inline int f(int x) {return x+1;}
	int main() { return 0;}
	,
	yap_cv_gcc=yes,yap_cv_gcc=no,yap_cv_gcc=yes)])
AC_MSG_RESULT($yap_cv_gcc)
if test "$yap_cv_gcc" = yes
then
M4GENHDRS=m4/gcc_genhdrs.m4
AC_DEFINE(HAVE_GCC,1,[Old m4 auto-heder generation, not really useful now])
else
M4GENHDRS=m4/cc_genhdrs.m4
fi
AC_SUBST(M4)
AC_SUBST(M4GENHDRS)

CMDEXT=sh
dnl SWI compatibility, I don't know why just use host...
changequote(,)dnl
if test "x$ARCH" = "x"; then
  case "$host" in
    *linux*)
      ARCH=`echo $host | sed 's/-.*/-linux/'`
      ;;
    *-gnu)
      ARCH=`echo $host | sed 's/\([^-]*\)-[^-]*-\([^-]*\)-gnu/\1-\2/'`
      ;;
    *)
      ARCH=`echo $host | sed 's/\([^-]*\)-[^-]*-\([^-]*\)/\1-\2/'`
      ;;
  esac
fi
changequote([,])dnl
AC_SUBST(ARCH)

case "$host" in
		*android*)
		   STARTUP_ANDROID=""
		   	STARTUP_DEFAULT="x"
			;;
			**)
       STARTUP_ANDROID="x"
       STARTUP_DEFAULT=""
			;;
esac
AC_SUBST(STARTUP_ANDROID)
AC_SUBST(STARTUP_DEFAULT)

CMDEXT=sh

dnl System stuff for dynamic linking.
dnl
dnl Exports:
dnl
AC_SUBST(EXTRAYAPLIBS)
dnl "" if we can do dynamic linking, "#" otherwise\
AC_SUBST(INSTALL_DLLS)
dnl if we need to merge several .o files into a single dll.
AC_SUBST(MERGE_DLL_OBJS)
dnl C-flags used to compile a file that will be loaded dynamically
AC_SUBST(CXXFLAGS)
AC_SUBST(SHLIB_CFLAGS)
AC_SUBST(SHLIB_CXXFLAGS)
dnl suffix for loadable binary (.so,.dll,.o)
AC_SUBST(SO)
dnl suffix for executable (.exe)
AC_SUBST(EXEC_SUFFIX)
dnl how to call the loader
AC_SUBST(DO_SECOND_LD)
AC_SUBST(SHLIB_LD)
AC_SUBST(SHLIB_CXX_LD)
AC_SUBST(YAPLIB_LD)
AC_SUBST(YAPLIB_CFLAGS)
AC_SUBST(EXTRA_LIBS_FOR_DLLS)
dnl objects in YAP library
AC_SUBST(YAPLIB)
AC_SUBST(DYNYAPLIB)
AC_SUBST(LDFLAGS)
AC_SUBST(SONAMEFLAG)
AC_SUBST(GMPDIR)
dnl install_info
AC_SUBST(INSTALL_INFO)
dnl let YAP_EXTRAS fall through configure, from the env into Makefile
AC_SUBST(YAP_EXTRAS)
AC_SUBST(NO_BUILTIN_REGEXP)
AC_SUBST(PKG_CHR)
AC_SUBST(PKG_CLIB)
AC_SUBST(PKG_CLPQR)
AC_SUBST(PKG_HTTP)
AC_SUBST(PKG_JPL)
AC_SUBST(PKG_PLUNIT)
AC_SUBST(PKG_R)
AC_SUBST(PKG_RDF)
AC_SUBST(PKG_SEMWEB)
AC_SUBST(PKG_SGML)
AC_SUBST(PKG_ZLIB)
AC_SUBST(PKG_CLPBN)
AC_SUBST(IN_UNIX)
AC_SUBST(MPI_CC)
AC_SUBST(INSTALL_COMMAND)
AC_SUBST(INSTALLCLP)
AC_SUBST(MAX_WORKERS)
AC_SUBST(STATIC_MODE)
AC_SUBST(PKG_WINCONSOLE)
AC_SUBST(WINDOWS)
AC_SUBST(EXTRA_INCLUDES_FOR_WIN32)
AC_SUBST(INDENT)

AC_SUBST(PKG_MINISAT)
AC_SUBST(PKG_REAL)

AC_SUBST(INSTALL_PRISM)

AC_SUBST(SAVED_STATE_PREFIX)

dnl check for threaded code
AC_MSG_CHECKING(for gcc threaded code)
AC_CACHE_VAL(yap_cv_threaded_code,[
AC_TRY_RUN(
	int main() {
	void *t = &&l2;
	l1: goto *t;
	l2: return 0;
}
	,
	yap_cv_threaded_code=yes,yap_cv_threaded_code=no,yap_cv_threaded_code=yes)])
AC_MSG_RESULT($yap_cv_threaded_code)
if test "$yap_cv_threaded_code" = yes && test "$yap_cv_gcc" = yes
then
	AC_DEFINE(USE_THREADED_CODE,1,[threaded emulator])
	M4GENABSMI=gen_gcc.m4
else
	M4GENABSMI=gen_ansi.m4
fi

AC_SUBST(M4GENABSMI)


dnl check for IEEE floats
AC_MSG_CHECKING(for IEEE floats)
AC_CACHE_VAL(yap_cv_ffieee,[
AC_TRY_RUN(
	int main() {
	  union { float f; int i} a;
	  a.f = 1;
	  if (a.i==0x3f800000) return 0;
	  return 1;
	}
	,
	yap_cv_ffieee=yes,yap_cv_ffieee=no,yap_cv_ffieee=yes)])
AC_MSG_RESULT($yap_cv_ffieee)
if test "$yap_cv_ffieee" = yes
then
AC_DEFINE(FFIEEE,1,[IEEE floating-point, basically everyone except old VAXEN])
fi

dnl check for sigsetjmp
AC_MSG_CHECKING(for sigsetjmp)
AC_CACHE_VAL(yap_cv_sigsetjmp,[
AC_TRY_COMPILE(
	#include <setjmp.h>
	,
	sigjmp_buf         RestartEnv;

	siglongjmp (RestartEnv, 1);
	,
	yap_cv_sigsetjmp=yes,yap_cv_sigsetjmp=no)])
AC_MSG_RESULT($yap_cv_sigsetjmp)
if test "$yap_cv_sigsetjmp" = yes
then
AC_DEFINE(HAVE_SIGSETJMP,1,[support for sigsetjmp])
fi

dnl check for sigsegv
AC_MSG_CHECKING(for sigsegv)
AC_CACHE_VAL(yap_cv_sigsegv,[
AC_TRY_COMPILE(
	#include <signal.h>
	#include <stdio.h>
	,
	printf("Signal value is %d\n", SIGSEGV);
	,
	yap_cv_sigsegv=yes,yap_cv_sigsegv=no)])
AC_MSG_RESULT($yap_cv_sigsegv)
if test "$yap_cv_sigsegv" = yes
then
AC_DEFINE(HAVE_SIGSEGV,1,[UNIX signal SEGV])
fi

dnl check for sigsegv
AC_MSG_CHECKING(for sigprof)
AC_CACHE_VAL(yap_cv_sigprof,[
AC_TRY_COMPILE(
	#include <signal.h>
	#include <stdio.h>
	,
	printf("Signal value is %d\n", SIGPROF);
	,
	yap_cv_sigprof=yes,yap_cv_sigprof=no)])
AC_MSG_RESULT($yap_cv_sigprof)
if test "$yap_cv_sigsegv" = yes
then
AC_DEFINE(HAVE_SIGPROF,1, [UNIX Signal SIGPROF])
fi

dnl check for siginfo
AC_MSG_CHECKING(for siginfo)
AC_CACHE_VAL(yap_cv_siginfo,[
AC_TRY_COMPILE(
	#include <signal.h>
	#include <stdio.h>
	,
	printf("SIGINFO value is %d\n", SIGINFO);
	,
	yap_cv_siginfo=yes,yap_cv_siginfo=no)])
AC_MSG_RESULT($yap_cv_siginfo)
if test "$yap_cv_siginfo" = yes
then
AC_DEFINE(HAVE_SIGINFO,1, [Unix SIGINFO])
fi

dnl check for sigfpe
AC_MSG_CHECKING(for sigfpe)
AC_CACHE_VAL(yap_cv_sigfpe,[
AC_TRY_COMPILE(
	#include <signal.h>
	#include <stdio.h>
	,
	printf("SIGFPE value is %d\n", SIGFPE);
	,
	yap_cv_sigfpe=yes,yap_cv_sigfpe=no)])
AC_MSG_RESULT($yap_cv_sigfpe)
if test "$yap_cv_sigfpe" = yes
then
AC_DEFINE(HAVE_SIGFPE,1, [Unix SIGFPE])
fi

AC_MSG_CHECKING("variable timezone in tzset")
AC_TRY_RUN(
[ #include <time.h>
  #include <stdlib.h>
  #ifdef __CYGWIN__
  #define timezone _timezone
  #endif
  extern long timezone;

  main()
  { tzset();

    if ( timezone > -15*3600 &&
         timezone < 15*3600 &&
         timezone % 60 == 0 )
      return 0;

    exit(1);
  }
],
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_VAR_TIMEZONE, 1,
          [Define if tzset sets timezone variable]),
AC_MSG_RESULT(no),
AC_MSG_RESULT(assuming no))

AC_CHECK_MEMBER(struct tm.tm_gmtoff,
                AC_DEFINE(HAVE_STRUCT_TIME_TM_GMTOFF, 1,
                          [Define is struct tm has tm_gmtoff]),
                [],
                [#include <time.h>])

dnl this is copied from the Tcl code
dnl this code checks whether the system defines an union wait
AC_MSG_CHECKING([union wait])
AC_TRY_LINK([#include <sys/types.h>
#include <sys/wait.h>], [
union wait x;
wait(&x);		/* make sure we can compile wait */
WIFEXITED(x);		/* Generates compiler error if WIFEXITED
			 * uses an int. */
], union_wait_ok=yes, union_wait_ok=no)
AC_MSG_RESULT($union_wait_ok)
if test "$union_wait_ok" = no; then
    AC_DEFINE(NO_UNION_WAIT, 1, [compile wait in UNIX])
fi

dnl check whether the system supports the environ variable
AC_MSG_CHECKING([environ])
AC_TRY_LINK([], [
extern char **environ;
], environ_ok=yes, environ_ok=no)
AC_MSG_RESULT($environ_ok)
if test "$environ_ok" = yes; then
    AC_DEFINE(HAVE_ENVIRON, 1,[environment access])
fi

dnl Checks for library functions.
AC_TYPE_SIGNAL
AC_CHECK_FUNCS(_NSGetEnviron _chsize_s access acosh)
AC_CHECK_FUNCS(alloca asinh atanh chdir clock clock_gettime)
AC_CHECK_FUNCS(ctime dlopen dup2)
AC_CHECK_FUNCS(erf feclearexcept)
AC_CHECK_FUNCS(feenableexcept fesetexceptflag fesettrapenable fesetround ffsl ffsll __builtin_ffsll fgetpos finite)
AC_CHECK_FUNCS(flsl flsll fpclass ftime ftruncate getcwd getenv)
AC_CHECK_FUNCS(getexecname)
AC_CHECK_FUNCS(gethostbyname gethostent gethostid gethostname)
AC_CHECK_FUNCS(gethrtime getpagesize getpid)
AC_CHECK_FUNCS(getpwnam getrlimit getrusage gettimeofday getwd)
AC_CHECK_FUNCS(isatty isnan isfinite isinf kill labs link lgamma)
AC_CHECK_FUNCS(LoadLibrary)
AC_CHECK_FUNCS(localeconv localtime lstat mallinfo)
AC_CHECK_FUNCS(mbscoll)
AC_CHECK_FUNCS(mbscasecoll)
AC_CHECK_FUNCS(mbsnrtowcs)
AC_CHECK_FUNCS(memcpy memmove mkstemp mktemp)
AC_CHECK_FUNCS(nanosleep mktime opendir)
AC_CHECK_FUNCS(putenv rand random readlink regexec)
AC_CHECK_FUNCS(rename rint sbrk select setbuf setlinebuf)
AC_CHECK_FUNCS(setitimer setsid setlinebuf sigaction)
AC_CHECK_FUNCS(siggetmask siginterrupt)
AC_CHECK_FUNCS(signal sigprocmask socket srand srandom stat)
AC_CHECK_FUNCS(strchr strerror stricmp)
AC_CHECK_FUNCS(strnlen strlwr strncat strncpy strtod)
AC_CHECK_FUNCS(time times tmpnam usleep utime vsnprintf wcsdup wcsnlen)

# android does not really have locale stuff..
case "$host" in
    *android*)
      echo "no locale"
      SAVED_STATE_PREFIX="/assets/lib/Yap/"
      AC_SUBST(C_PARSER_FLAGS)
      AC_SUBST(GCC_VERSION)
      ;;
      **)
      AC_CHECK_HEADERS(locale.h)
      AC_CHECK_FUNCS(localeconv setlocale)
      ;;
esac

AC_CHECK_FUNC(regexec, [NO_BUILTIN_REGEXP="#"], [NO_BUILTIN_REGEXP=""])

AC_CHECK_FUNCS(NSLinkModule)

if test "$use_condor" = "no"
then
  AC_CHECK_FUNCS(alarm mmap popen shmat sleep system ttyname waitpid)
fi

if test "$target_os" != "mingw32"
then
  AC_CHECK_FUNCS(fetestexcept snprintf)
fi

dnl check for mpz_xor
AC_MSG_CHECKING(for mpz_xor)
AC_CACHE_VAL(yap_cv_mpz_xor,[
AC_TRY_LINK(
	#include <gmp.h>
	void check(mpz_t rop,mpz_t op1,mpz_t op2) {
	  mpz_xor(rop,op1,op2);
	}
	,
	,
	yap_cv_mpz_xor=yes,yap_cv_mpz_xor=no)])
AC_MSG_RESULT($yap_cv_mpz_xor)
if test "$yap_cv_mpz_xor" = yes
then
  AC_DEFINE(HAVE_MPZ_XOR,1,[Older versions of MPZ didn't have XOR])
fi

if test "$use_malloc" = "yes" -a "$maxmemory" = "yes"
then
  maxmemory="no"
fi

dnl On some systems doing a fflush(NULL) to flush all output streams
dnl has the side-effect of making all charactes waiting in input
dnl pipes disapear.

AC_CACHE_CHECK(
[if fflush(NULL) clobbers input pipes],
[yap_cv_broken_fflush_null],
[ cat >conftest.$ac_ext <<EOF
  #include <stdio.h>
  #include <stdlib.h>
  int main(int argc, char **argv)
  {
      char *buf;
      int i;
      char *bp;
      bp = buf = malloc(1024);
      while (1) {
          while ((i = getc(stdin)) != -1
                 && (*bp++ = i) != '\n'
                 && (bp - buf < 1024) )
    	  /* DO NOTHING */ ;
          *bp = '\0';
          fprintf(stdout, "%s", buf);
          fflush(NULL);
          if( i == EOF ) return 0;
          bp = buf;
      }
  }
EOF
  AC_TRY_EVAL(ac_link)
  if test "$?" = 0
  then
    cat conftest.$ac_ext | ./conftest$ac_exeext > conftest.out
    AC_TRY_COMMAND(cmp conftest.$ac_ext conftest.out)
    if test "$?" = 0
    then
      AC_MSG_RESULT(no)
      yap_cv_broken_fflush_null=no
    else
      AC_MSG_RESULT(yes)
      yap_cv_broken_fflush_null=yes
    fi
  else
    dnl This should never happen
    AC_MSG_RESULT(failed)
    yap_cv_broken_fflush_null=failed
  fi
  rm -f conftest.$ac_ext conftest.$ac_objext conftest$ac_exeext conftest.out ])
if test "$yap_cv_broken_fflush_null" = yes
then
  dnl be conservative: if the test failed, assume fflush(NULL) is
  dnl not working properly
  AC_DEFINE([BROKEN_FFLUSH_NULL],[],[if fflush(NULL) clobbers input pipes]1)
fi

dnl disable smart memory management

if test "$threads" = "yes"
then
  if test "$use_malloc" = "no"
  then
    AC_DEFINE(USE_DL_MALLOC,1,[use Doug Lea's malloc for all allocation])
  else
    AC_DEFINE(USE_SYSTEM_MALLOC,1,[use OS malloc for all allocation])
  fi
else
  case "$orparallelism" in
    sba|copy)
      if test x"$ac_cv_func_mmap" = x"yes"
      then
        AC_DEFINE(USE_SYSTEM_MMAP,1,[use mmap in or-parallel allocation])
      else
        AC_DEFINE(USE_SYSTEM_SHM,1,[use shm in or-parallel allocation])
      fi
    ;;
#    a-cow)
  esac
  if test "$use_malloc" = "no"
  then
    AC_DEFINE(USE_DL_MALLOC,1,[use Doug Lea's malloc for all allocation])
  else
    AC_DEFINE(USE_SYSTEM_MALLOC,1,[use OS malloc for all allocation])
  fi
fi
AC_DEFINE(GC_NO_TAGS,1,[use Barts idea of allocating extra memory])



dnl SWI compatibility support!
PROLOG_SYSTEM=yap
IN_YAP=
IN_SWI="#"
CHR_TARGETS=chr_support."$SO"

AC_SUBST(PROLOG_SYSTEM)
AC_SUBST(IN_YAP)
AC_SUBST(IN_SWI)
AC_SUBST(TARGETS)
AC_SUBST(PLTARGETS)
AC_SUBST(CHR_TARGETS)

# use the lib directly in mingw setups
if test "$win_abi" = "32"; then
  CLIB_PTHREADS="$pthreadlib"
else
 AC_CHECK_LIB(pthread, pthread_create,
                    [CLIB_PTHREADS="-lpthread"],[CLIB_PTHREADS=""])
fi
AC_SUBST(CLIB_PTHREADS)

AC_CHECK_TYPES(socklen_t, [], [],
[
#include <sys/types.h>
#include <sys/socket.h>
])
AC_CHECK_TYPES(ssize_t, [], [],
[
#include <sys/types.h>
#include <sys/socket.h>
])

EXTRA_LIBS_FOR_SWIDLLS="$EXTRA_LIBS_FOR_DLLS $CLIB_PTHREADS"
AC_SUBST(EXTRA_LIBS_FOR_SWIDLLS)

dnl tszet and timezone trouble

AC_MSG_CHECKING("variable timezone in tzset")
AC_TRY_RUN(
[ #include <time.h>
  #include <stdlib.h>
  #ifdef __CYGWIN__
  #define timezone _timezone
  #endif
  extern long timezone;

  main()
  { tzset();

    if ( timezone > -15*3600 &&
	 timezone < 15*3600 &&
	 timezone % 60 == 0 )
      return 0;

    exit(1);
  }
],
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_VAR_TIMEZONE, 1,
	  [Define if tzset sets timezone variable]),
AC_MSG_RESULT(no),
AC_MSG_RESULT(assuming no))

AC_CHECK_MEMBER(struct tm.tm_gmtoff,
		AC_DEFINE(HAVE_STRUCT_TIME_TM_GMTOFF, 1,
			  [Define is struct tm has tm_gmtoff]),
		[],
		[#include <time.h>])


if test "x$PLARCH" = "x"; then
  case "$host" in
    *linux*)
      PLARCH=`echo $host | sed 's/-.*/-linux/'`
    ;;
    i?86-*mingw32*|i?86-msys*)
      # Make PLARCH match the definition in src/config/win32.h
      PLARCH=i386-win32
      ;;
    x86_64-*mingw32*|x86_64-msys*)
      # Make PLARCH match the definition in src/config/win64.h
      PLARCH=x64-win64
      ;;
    *-gnu)
      PLARCH=`echo $host | sed 's/\([^-]*\)-[^-]*-\([^-]*\)-gnu/\1-\2/'`
      ;;
    *)
      PLARCH=`echo $host | sed 's/\([^-]*\)-[^-]*-\([^-]*\)/\1-\2/'` #'
      ;;
  esac
fi



m4_include([packages/myddas/configure.in])

m4_include([JIT/configure.in])

if test "$PKG_CLIB" != ""
then

m4_include([packages/clib/maildrop/rfc2045/configure.in])
m4_include([packages/clib/maildrop/rfc822/configure.in])
m4_include([packages/clib/configure.in])

fi

if test "$PKG_LIBARCHIVE" != ""
then

m4_include([packages/archive/configure.in])

if test "$ARCHIVE_TARGETS" = "nolib"
then
  PKG_LIBARCHIVE=""
fi

fi

if test "$PKG_ODBC" != ""; then

m4_include([packages/odbc/configure.in])

if test "$ODBC_TARGETS" = "nolib"
then
  PKG_ODBC=""
fi

else
	   ODBC_TARGETS=nolib
	   ODBC_PLTARGETS=odbc.pl
fi


m4_include([packages/bdd/configure.in])

m4_include([packages/cplint/configure.in])

dnl zlib

if test "$PKG_ZLIB" != ""
then

m4_include([packages/zlib/configure.in])

if test "$ZLIB_TARGETS" = "nolib"
then
  PKG_ZLIB=""
fi

fi

if test "$yap_cv_R" != "no" -a  -e "$srcdir"/packages/real/Makefile.in; then
   PKG_REAL="packages/real"

   m4_include([packages/real/configure.in])
else
    REAL_TARGET="dummy"
    PKG_REAL=""
fi

dnl
dnl java is hard
dnl

if test "$yap_cv_java" = no
then
	PKG_JPL=""
elif test -e "$srcdir"/packages/jpl/Makefile.in
then
	PKG_JPL="packages/jpl"
	if test "$yap_cv_java" != "yes"; then
          JAVA_HOME=$yap_cv_java
	  JAVAPREFIX="$JAVA_HOME"/bin
       elif test -n "$JAVA_HOME"; then
	  JAVAPREFIX="$JAVA_HOME"/bin
       fi

       m4_include([packages/jpl/configure.in])

fi

if test -e "$srcdir"/packages/raptor/Makefile.in
then
   PKG_RAPTOR="packages/raptor"
   m4_include([packages/raptor/configure.in])
else
   PKG_RAPTOR=""
fi

m4_include([library/matlab/configure.in])

m4_include([library/lammpi/configure.in])

m4_include([packages/python/configure.in])

m4_include([packages/swig/configure.in])

m4_include([packages/cuda/configure.in])

m4_include([packages/gecode/configure.in])

m4_include([packages/prosqlite/configure.in])

AC_SUBST(PKG_LIBARCHIVE)

AC_SUBST(PKG_ODBC)

dnl parms.h

AC_DEFINE_UNQUOTED(YAP_STARTUP,  [ "$yap_startup" ], [saved state file])

yap_timestamp=`date`
yap_nversion=`expr $YAP_MAJOR_VERSION \* 10000 + $YAP_MINOR_VERSION \* 100 + $YAP_POINT_VERSION`
yap_startup=startup.yss

AC_DEFINE_UNQUOTED( C_CC, [ "$CC" ], [c-compiler used])
AC_DEFINE_UNQUOTED( C_CFLAGS, ["$CFLAGS $YAP_EXTRAS $  -D_YAP_NOT_INSTALLED_=1 $CPPFLAGS  -I. -I$srcdir/H -I$srcdir/include  -I$srcdir/os -I$srcdir/OPTYap -I$srcdir/BEAM" ], [compilation flags])
AC_DEFINE_UNQUOTED( C_LDFLAGS, [ "$LDFLAGS" ], [linking flags])
AC_DEFINE_UNQUOTED( C_LIBS, [ "$LIBS" ], [main libs for YAP])
AC_DEFINE_UNQUOTED( C_LIBPLSO, [ "$LIBS $EXTRA_LIBS_FOR_DLLS" ], [libs for linking with DLLs])
AC_DEFINE_UNQUOTED( SO_EXT, [ "$SO" ], [relocable objects])
AC_DEFINE_UNQUOTED( SO_PATH, [ "$SOPATH" ], [library search variable])
AC_DEFINE_UNQUOTED( YAP_ARCH, [ "$ARCH" ], [architecture])
AC_DEFINE_UNQUOTED( YAP_BINDIR, [ "$prefix/bin" ], [where the yap executable lives])
AC_DEFINE_UNQUOTED( YAP_FULL_VERSION, [ "YAP $YAP_VERSION ($ARCH): $yap_timestamp" ], [YAP version string])
AC_DEFINE_UNQUOTED( YAP_LIBDIR, [ "$prefix/lib/Yap" ], [where to look for shared libraries])
AC_DEFINE_UNQUOTED( YAP_NUMERIC_VERSION, [ $yap_nversion ], [numerical version])
AC_DEFINE_UNQUOTED( YAP_PL_SRCDIR, [ "$prefix/share/Yap/pl" ], [where to look for Prolog sources])
AC_DEFINE_UNQUOTED( YAP_ROOTDIR, [ "$prefix" ], [where YAP lives])
AC_DEFINE_UNQUOTED( YAP_SHAREDIR, [ "$prefix/share" ], [where to look for the Prolog library])
AC_DEFINE_UNQUOTED( YAP_TIMESTAMP, [ "$yap_timestamp" ], [date of compilation])
AC_DEFINE_UNQUOTED( YAP_VERSION, [ "$YAP_VERSION" ], [yap version])
AC_DEFINE_UNQUOTED( YAP_YAPLIB, [ "$YAPLIB" ], [name of YAP library])


mkdir -p  library/matrix
mkdir -p  library/mpi
mkdir -p  library/random
mkdir -p  library/regex
mkdir -p  library/system
mkdir -p  library/tries
mkdir -p  library/rltree
mkdir -p  LGPL
mkdir -p  packages/
mkdir -p  packages/clib
mkdir -p  packages/clib/sha1
mkdir -p  packages/clib/maildrop
mkdir -p  packages/clib/maildrop/rfc822
mkdir -p  packages/clib/maildrop/rfc2045
mkdir -p  packages/CLPBN
mkdir -p  packages/CLPBN/clpbn
mkdir -p  packages/CLPBN/horus
mkdir -p  packages/clpqr
mkdir -p  packages/http
mkdir -p  packages/jpl
mkdir -p  packages/jpl/src
mkdir -p  packages/jpl/src/c
mkdir -p  packages/jpl/src/java
mkdir -p  packages/jpl/src/java/jpl
mkdir -p  packages/jpl/src/java/jpl/fli
mkdir -p  packages/jpl/src/java/jpl/test
mkdir -p  packages/jpl/examples
mkdir -p  packages/jpl/examples/java
mkdir -p  packages/meld
mkdir -p  packages/myddas
mkdir -p  packages/PLStream
mkdir -p  packages/PLStream/libtai
mkdir -p  packages/plunit
mkdir -p  packages/prism
mkdir -p  packages/prism/src
mkdir -p  packages/prism/src/c
mkdir -p  packages/prism/src/c/core
mkdir -p  packages/prism/src/c/mp
mkdir -p  packages/prism/src/c/up
mkdir -p  packages/prism/src/prolog
mkdir -p  packages/ProbLog
mkdir -p  packages/ProbLog/simplecudd
mkdir -p  packages/prosqlite
mkdir -p  packages/R
mkdir -p  packages/RDF
mkdir -p  packages/real
mkdir -p  packages/semweb
mkdir -p  packages/sgml
mkdir -p  packages/xml
mkdir -p  packages/yap-lbfgs
mkdir -p  packages/zlib
mkdir -p  packages/archive
mkdir -p  swi
mkdir -p  swi/console
mkdir -p  swi/library
mkdir -p  swi/library/clp

AC_CONFIG_FILES([Makefile])
AC_CONFIG_FILES([library/Makefile])
AC_CONFIG_FILES([library/lammpi/Makefile])
AC_CONFIG_FILES([library/matrix/Makefile])
AC_CONFIG_FILES([library/mpi/Makefile])
AC_CONFIG_FILES([library/random/Makefile])
AC_CONFIG_FILES([library/regex/Makefile])
AC_CONFIG_FILES([library/rltree/Makefile])
AC_CONFIG_FILES([library/system/Makefile])
AC_CONFIG_FILES([library/tries/Makefile])
AC_CONFIG_FILES([packages/Makefile.defs])
AC_CONFIG_FILES([packages/Dialect.defs])
AC_CONFIG_FILES([packages/meld/Makefile])
AC_CONFIG_FILES([packages/xml/Makefile])
AC_CONFIG_FILES([packages/ProbLog/Makefile ])
AC_CONFIG_FILES([swi/library/Makefile])
AC_CONFIG_FILES([swi/library/clp/Makefile])


if test "$PKG_CHR" != ""; then
AC_CONFIG_FILES([packages/chr/Makefile])
fi

if test "$PKG_CLIB" != ""; then
AC_CONFIG_FILES([packages/clib/maildrop/rfc2045/Makefile])
AC_CONFIG_FILES([packages/clib/maildrop/rfc2045/config.h])
AC_CONFIG_FILES([packages/clib/maildrop/rfc2045/rfc2045charset.h])
AC_CONFIG_FILES([packages/clib/maildrop/rfc822/Makefile])
AC_CONFIG_FILES([packages/clib/maildrop/rfc822/config.h])
AC_CONFIG_FILES([packages/clib/Makefile])
fi

if test "$PKG_CLPQR" != ""; then
AC_CONFIG_FILES([packages/clpqr/Makefile])
fi

if test "$PKG_HTTP" != ""; then
AC_CONFIG_FILES([packages/http/Makefile])
fi

if test "$PKG_JPL" != ""; then
AC_CONFIG_FILES([packages/jpl/Makefile packages/jpl/src/java/Makefile ])
fi

if test "$PKG_PLUNIT" != ""; then
AC_CONFIG_FILES([packages/plunit/Makefile])
fi

if test "$PKG_R" != ""; then
AC_CONFIG_FILES([packages/R/Makefile])
fi

if test "$PKG_RDF" != ""; then
AC_CONFIG_FILES([packages/RDF/Makefile])
fi

if test "$PKG_SEMWEB" != ""; then
AC_CONFIG_FILES([packages/semweb/Makefile])
fi

if test "$PKG_SGML" != ""; then
AC_CONFIG_FILES([packages/sgml/Makefile])
fi

if test "$PKG_ZLIB" != ""; then
AC_CONFIG_FILES([packages/zlib/Makefile])
fi

if test "$PKG_LIBARCHIVE" != ""; then
AC_CONFIG_FILES([packages/archive/Makefile])
fi

if test "$PKG_ODBC" != ""; then
AC_CONFIG_FILES([packages/odbc/Makefile])
fi


if test "$PKG_MINISAT" != ""; then
AC_CONFIG_FILES([packages/swi-minisat2/Makefile])
AC_CONFIG_FILES([packages/swi-minisat2/C/Makefile])
fi

if test "$PKG_REAL" != ""; then
AC_CONFIG_FILES([packages/real/Makefile])
fi

if test "$PKG_MYDDAS" != ""; then
AC_CONFIG_FILES([packages/myddas/Makefile])
fi

if test "$PKG_CLPBN" != ""; then
AC_CONFIG_FILES([packages/CLPBN/Makefile])
AC_CONFIG_FILES([packages/CLPBN/horus/Makefile])
fi

if test "$PKG_PRISM" != ""; then
AC_CONFIG_FILES([packages/prism/src/c/Makefile])
AC_CONFIG_FILES([packages/prism/src/prolog/Makefile])
fi

if test "$PKG_PROSQLITE" != ""; then
   AC_CONFIG_FILES([packages/prosqlite/Makefile])
fi

if test "$PKG_WINCONSOLE" != ""; then
AC_CONFIG_FILES([swi/console/Makefile])
fi

AC_CONFIG_FILES([packages/yap-lbfgs/Makefile])

AC_OUTPUT()