dnl Process this file with autoconf to produce a configure script.
AC_INIT(main.c)
dnl Checks for system and operating system.
AC_CANONICAL_SYSTEM
AC_SUBST(CPUTYPE)
CPUTYPE="$host_cpu"
AC_SUBST(OSTYPE)
OSTYPE="$host_os"	
AC_SUBST(MIGRATESUBVERSION)
MIGRATESUBVERSION=""
MIGRATESUBVERSION=`svn info | grep Revision | awk '{print $2}'`

dnl Checks for programs.
AC_SUBST(CFLAGS)
CFLAGS="  "
THREADCLFAGS=" "
echo "===============================";
echo $MIGRATESUBVERSION .
echo $host_vendor;
echo $host_os;
echo $host_cpu;
echo "===============================";
echo "";
AC_PROG_CC(gcc icc pgcc cc)
case $CC in
        gcc) case "$host_vendor" in
	     apple) CFLAGS="-O3 -Wall -ffast-math -funroll-loops -fomit-frame-pointer  -falign-loops=16  -D$CPUTYPE" ;;
	     *) CFLAGS="-O3 -Wall -ffast-math -funroll-loops -fomit-frame-pointer  -falign-loops=16  -D$CPUTYPE" ;;
	     esac ;;
        pgcc) CFLAGS="-B -Bstatic -fast ";;
#        icc)  CFLAGS=" -O3 -tpp7 -xKW -pad -ip ";;
        icc)  CFLAGS=" -fast ";;
        cc)   case "$host_vendor" in
                sgi) CFLAGS="-O2 -Xcpluscomm -DSGI";;
                dec) CFLAGS="-fast -inline speed -DCOMPAQ"; libdec="-lm";;
                ibm) CFLAGS="-O3 -q inline -q cpluscmt -DIBM";;
                *)   CFLAGS="-O " ;;
             esac
esac
echo "+++++++++++++++++++++++++++++++++++++++"
echo $CC 
echo $CFLAGS
echo "+++++++++++++++++++++++++++++++++++++++"

AC_PROG_INSTALL
dnl Checks for libraries.
LIBS=" "

AC_SUBST(RANDOMCFLAGS)
AC_SUBST(RANDOMLIBS)

RANDOMLIBS=" "
RANDOMCFLAG=" "

AC_SUBST(THREADCFLAGS)
AC_SUBST(THREADLIB)

AC_SUBST(TAR)
TAR="tar"

THREADLIBS=" "
AC_SUBST(HOARDLIB)
HOARDLIB=" "

case "`$ac_config_guess`" in
	powerpc-apple-darwin*) LIBS=""; TAR="gnutar";;
	*) ;;
esac
	
AC_CHECK_LIB(pthread, pthread_create, [
        pthreadlib=yes
        pthreadlib="-lpthread" ])
if test -n "$pthreadlib"; then
	THREADLIB="$pthreadlib"
fi

AC_SUBST(MPICC)
AC_CHECK_LIB(mpi,MPI_Init)

case "`$ac_config_guess`" in
	powerpc-apple-darwin*) MPICC="hcc";;
	*aix*) MPICC="mpcc_r";;
	*) MPICC=mpicc;;
esac

SAVELIB=$LIBS
LIBS="-lpthread $LIBS"
AC_CHECK_LIB(hoard, calloc, [
        hoardlib=yes
        hoardlib="-lhoard" ])
if test -n "$hoardlib"; then
	HOARDLIB="$hoardlib"
fi
LIBS=$SAVELIBS

AC_CHECK_LIB(m, exp)

if test -n "$libdec"; then
	LIBS="$libdec"
fi


dnl Checks for header files.
AC_CONFIG_HEADER(conf.h)
AC_HEADER_STDC
AC_CHECK_HEADERS(limits.h strings.h)

if test -n "$pthreadlib"; then
	AC_CHECK_HEADERS(pthread.h,THREADCFLAGS="-D_REENTRANT -DPTHREADS")
fi


case "`$ac_config_guess`" in
	powerpc-apple-darwin*) 	AC_CHECK_HEADERS(pthread.h,THREADCFLAGS="-D_REENTRANT -DPTHREADS");;
	*) ;;
esac

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_SIZE_T
AC_CHECK_TYPE(int, long)
AC_STRUCT_TM
AC_C_INLINE

dnl Checks for library functions.
AC_TYPE_SIGNAL
AC_FUNC_STRFTIME
AC_CHECK_FUNCS(strcspn)
AC_CHECK_FUNCS(strsep)

case "`$ac_config_guess`" in
        *aix*) ;;
        *) AC_CHECK_FUNCS(lgamma);;
esac


dnl checking for SSE2 or ALTIVEC
AC_SUBST(HARDWARECFLAGS)
HARDWARECFLAGS=""
AC_ARG_ENABLE(sse2,
  [AS_HELP_STRING([--enable-sse2], [enable SSE2 optimizations])], 
  have_sse2=$enableval, have_sse2=no)

if test "$have_sse2" = "yes"; then
  AC_DEFINE(HAVE_SSE2, 1, [Define to enable SSE2 optimizations])
  HARDWARECFLAGS="-msse2 -DSSE2"
fi

AC_ARG_ENABLE(altivec, 
  [AS_HELP_STRING([--enable-altivec], [enable Altivec optimizations])],
  have_altivec=$enableval, have_altivec=no)

if test "$have_altivec" = "yes"; then
  AC_DEFINE(HAVE_ALTIVEC, 1, [Define to enable Altivec optimizations.])
  HARDWARECFLAGS="$CFLAGS -faltivec -maltivec"
fi

dnl substitute which files to compile for mersenne twister
AC_SUBST(MT_FILES)
MT_FILES="SFMT.c"
# SFMT.h SFMT-params19937.h"
if test "$have_sse2" = "yes"; then
MT_FILES="SFMT.c"
# SFMT.h SFMT-sse2.h SFMT-sse2.c"
fi
if test "$have_altivec" = "yes"; then
MT_FILES="SFMT.c"
# SFMT.h SFMT-alti.h SFMT-alti.c"
fi
echo "Copying source from Mersenne-Twister directory into main source directory"
sh copy_mt_to_src

AC_OUTPUT(Makefile)
echo "-------------------------------------------------------------"
echo " MIGRATE-N is now setup"
echo " to compile the program you need to type one of the"
echo " commands below (ordered by preference):"
echo " "
echo " SINGLE CPU machines "
echo "     make pretty    # with PDF output support (recommended)"
echo "                    # this might not work on all machines, let me know if"
echo "                    # make pretty fails" 
echo "     make           # standard compile, should always work"
echo " "
echo " SMP machines  [more than 1 CPU in machine] "
echo "     make thread    # uses the thread library if present"
echo "     make thread-pretty # uses the thread library if present"
echo " "
echo " PARALLEL Computers, Clusters with MPI software "
echo "     make mpis        # slow networks, nodes are single CPU "
echo "     make mpis-thread # slow network, nodes are SMPs"
echo "     make mpis-thread-pretty  # slow network, nodes are SMPs"
echo "     make mpi         # fast networks, nodes are single CPU "
echo "     make mpi-thread  # fast network, nodes are SMPs"
echo "-------------------------------------------------------------"