path: root/fortran/configure.in

dnl Process this file with autoconf to produce configure.
dnl
dnl Copyright by the Board of Trustees of the University of Illinois.
dnl All rights reserved.
dnl
dnl This file is part of HDF5.  The full HDF5 copyright notice, including
dnl terms governing use, modification, and redistribution, is contained in
dnl the files COPYING and Copyright.html.  COPYING can be found at the root
dnl of the source code distribution tree; Copyright.html can be found at the
dnl root level of an installed copy of the electronic HDF5 document set and
dnl is linked from the top-level documents page.  It can also be found at
dnl http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html.  If you do not have
dnl access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu.

dnl ----------------------------------------------------------------------
dnl Initialize configure.
dnl
AC_REVISION($Id$)

dnl AC_INIT takes the name of the package, the version number, and an
dnl email address to report bugs. AC_CONFIG_SRCDIR takes a unique file
dnl as its argument.
dnl
dnl NOTE: Don't forget to change the version number here when we do a
dnl release!!!
dnl
AC_INIT([HDF5 Fortran], [1.5.50], [hdfhelp@ncsa.uiuc.edu])
AC_CONFIG_SRCDIR([src/HDF5.f90])
AC_CONFIG_HEADER([src/H5config_fortran.h])

AC_CONFIG_AUX_DIR([../bin])

AC_OUTPUT_COMMANDS([
  echo "creating src/H5pubconf_fortran.h"
  sed 's/#define /#define H5_/' < src/H5config_fortran.h |\
    sed 's/#undef /#undef H5_/' > pubconf_fortran

  if test ! -f src/H5pubconf_fortran.h; then
    /bin/mv -f pubconf_fortran src/H5pubconf_fortran.h
  elif (diff pubconf_fortran src/H5pubconf_fortran.h >/dev/null); then
    /bin/rm -f pubconf_fortran
    echo "src/H5pubconf_fortran.h is unchanged"
  else
    /bin/mv -f pubconf_fortran src/H5pubconf_fortran.h
  fi
])

AC_CANONICAL_HOST
AC_SUBST(CPPFLAGS)
AC_SUBST(FFLAGS)

dnl ----------------------------------------------------------------------
dnl HDF5 integer variables for the H5fortran_types.f90 file.
dnl
AC_SUBST(R_LARGE)
AC_SUBST(R_INTEGER)
AC_SUBST(HSIZE_T)
AC_SUBST(HSSIZE_T)
AC_SUBST(HID_T)
AC_SUBST(SIZE_T)
AC_SUBST(OBJECT_NAMELEN_DEFAULT_F)

dnl ----------------------------------------------------------------------
dnl Dump all shell variables values.
dnl
AC_MSG_CHECKING(shell variables initial values)
set >&5
AC_MSG_RESULT(done)

dnl ----------------------------------------------------------------------
dnl Where is the root of the source tree.  Give an absolute address so
dnl we can find it no matter which directory of the distribution is our
dnl current directory.  The built-in pwd fails on some systems, but the
dnl /bin/pwd version works OK.
dnl
if test -x "/bin/pwd"; then
   pwd=/bin/pwd
else
   pwd=pwd
fi
AC_SUBST(ROOT) ROOT=`$pwd`

dnl ----------------------------------------------------------------------
dnl Check that the cache file was build on the same host as what we're
dnl running on now.
dnl
AC_CACHE_CHECK(for cached host,hdf5_cv_host,hdf5_cv_host="none");
if test "X$hdf5_cv_host" = "Xnone"; then
   hdf5_cv_host=$host
elif test "$hdf5_cv_host" != "$host"; then
   echo "The config.cache file was generated on $hdf5_cv_host but"
   echo "this is $host. Please remove that file and try again."
   AC_MSG_ERROR(config.cache file is invalid)
fi

dnl ----------------------------------------------------------------------
dnl Source any special files that we need.  These files normally aren't
dnl present but can be used by the maintainers to fine tune things like
dnl turning on debug or profiling flags for the compiler.  The search order
dnl is:
dnl
dnl	CPU-VENDOR-OS
dnl	VENDOR-OS
dnl	CPU-OS
dnl	CPU-VENDOR
dnl	OS
dnl	VENDOR
dnl	CPU
dnl
dnl If the `OS' ends with a version number then remove it. For instance,
dnl `freebsd3.1' would become `freebsd'
case "$host_os" in
   aix4.*)
      host_os_novers=aix4.x
      ;;
   aix5.*)
      host_os_novers=aix5.x
      ;;
   freebsd*)
      host_os_novers=freebsd
      ;;
   irix5.*)
      host_os_novers=irix5.x
      ;;
   irix6.*)
      host_os_novers=irix6.x
      ;;
   osf4.*)
      host_os_novers=osf4.x
      ;;
   osf5.*)
      host_os_novers=osf5.x
      ;;
   solaris2.*)
      host_os_novers=solaris2.x
      ;;
   *)
      host_os_novers=$host_os
      ;;
esac

host_config="none"
for f in $host_cpu-$host_vendor-$host_os \
	 $host_cpu-$host_vendor-$host_os_novers \
	 $host_vendor-$host_os \
         $host_vendor-$host_os_novers \
	 $host_cpu-$host_os \
         $host_cpu-$host_os_novers \
         $host_cpu-$host_vendor \
	 $host_os \
	 $host_os_novers \
	 $host_vendor \
	 $host_cpu ; do
   AC_MSG_CHECKING(for config $f)
   if test -f $srcdir/config/$f; then
      host_config=$srcdir/config/$f
      AC_MSG_RESULT(found)
      break
   fi
   AC_MSG_RESULT(no)
done
if test "X$host_config" != "Xnone"; then
   CC_BASENAME="`echo $CC |cut -f1 -d' ' |xargs basename 2>/dev/null`"
   . $host_config
fi

dnl ----------------------------------------------------------------------
dnl Check for programs.
dnl
AC_PROG_CC
AC_PROG_CPP	dnl this is checked for when AC_HEADER_STDC is done
CC_BASENAME="`echo $CC |cut -f1 -d' ' |xargs basename 2>/dev/null`"
AC_PROG_MAKE_SET
AC_PROG_INSTALL
AM_PROG_LIBTOOL

dnl ----------------------------------------------------------------------
dnl Check if they have Perl installed on their system. We only need Perl
dnl if they're using a GNU compiler.
dnl
AC_SUBST(PERL) PERL=""
if test "X$GCC" = "Xyes"; then
  AC_CHECK_PROGS(PERL, perl,, $PATH)
fi

if test -z "$AR"; then
  AC_CHECK_PROGS(AR,ar xar,:,$PATH)
fi
AC_SUBST(AR)

dnl ----------------------------------------------------------------------
dnl Sometimes makes think the `.PATH:' appearing before the first rule
dnl with an action should override the `all' default target. So we have
dnl to decide what the proper syntax is.
dnl
if test -z "$SEARCH"; then
  AC_MSG_CHECKING(how make searches directories)
  while true; do #for break
    dnl The most common method is `VPATH=DIR1 DIR2 ...'
    cat >maketest <<EOF
VPATH=$srcdir/config $srcdir/src $srcdir/bin
.c.o:
	cp $< H5_f.o
   
foo: H5_f.o
	/bin/rm -f H5_f.o
	@echo works
EOF
   
    if (${MAKE-make} -f maketest foo) >/dev/null 2>&1; then
      SEARCH_RULE='VPATH='
      SEARCH_SEP=' '
      AC_MSG_RESULT([VPATH=DIR1 DIR2 ...])
      break
    fi
   
    dnl The second most common method is like above except with the
    dnl directories separated by colons.
    cat >maketest <<EOF
VPATH=$srcdir/config:$srcdir/src:$srcdir/bin
.c.o:
	cp $< H5_f.o
   
foo: H5_f.o
	/bin/rm -f H5_f.o
	@echo works
EOF
   
    if (${MAKE-make} -f maketest foo) >/dev/null 2>&1; then
      SEARCH_RULE='VPATH='
      SEARCH_SEP=':'
      AC_MSG_RESULT([VPATH=DIR1:DIR2:...])
      break
    fi
   
    dnl pmake uses the construct `.PATH: DIR1 DIR2
    cat >maketest <<EOF
.PATH: $srcdir/config $srcdir/src $srcdir/bin
.c.o:
	cp $< H5_f.o
   
foo: H5_f.o
	/bin/rm -f H5_f.o
	@echo works
EOF

    if (MAKE= ${MAKE-make} -f maketest foo) >/dev/null 2>&1; then
      SEARCH_RULE='.PATH: '
      SEARCH_SEP=' '
      AC_MSG_RESULT([.PATH: DIR1 DIR2 ...])
      break
    fi
   
    dnl No way for make to search directories
    SEARCH_RULE='## SEARCH DISABLED: '
    SEARCH_SEP=' '
    AC_MSG_RESULT([it doesn't])
    if test ! -f configure; then
      AC_MSG_ERROR(${MAKE-make} requires the build and source directories to be the same)
    fi
    break
  done
  rm maketest
fi

dnl ----------------------------------------------------------------------
dnl Production flags?  Save the value in $CONFIG_MODE so we have it for
dnl the record.
dnl
AC_MSG_CHECKING([for production mode])
AC_ARG_ENABLE([production],
              [AC_HELP_STRING([--enable-production],
                              [Determines how to run the compiler.])])

case "X-$enable_production" in
  X-yes)
    AC_MSG_RESULT("production")

    dnl Remove the "-g" flag from CFLAGS if it's in there.
    dnl
    CFLAGS_temp=""
    if test -n "$CFLAGS"; then
      for d in $CFLAGS ; do
        if test "X$d" != "X-g"; then
          CFLAGS_temp="$CFLAGS_temp $d"
        fi
      done
      CFLAGS=$CFLAGS_temp
    fi

    CONFIG_MODE=production
    CFLAGS="$CFLAGS $PROD_CFLAGS"
    CPPFLAGS="$CPPFLAGS $PROD_CPPFLAGS"
    ;;
  X-|X-no)
    AC_MSG_RESULT("development")
    CONFIG_MODE=development
    CFLAGS="$CFLAGS $DEBUG_CFLAGS"
    CPPFLAGS="$CPPFLAGS $DEBUG_CPPFLAGS"
    ;;
  X-pg|X-profile)
    AC_MSG_RESULT("profile")
    CONFIG_MODE=profile
    CFLAGS="$CXXFLAGS $PROFILE_CFLAGS"
    CPPFLAGS="$CPPFLAGS $PROFILE_CPPFLAGS"
    ;;
  *)
    AC_MSG_RESULT("user-defined")
    CONFIG_MODE="$X-enableval"
    ;;
esac

dnl ----------------------------------------------------------------------
dnl If we should build only static executables
dnl
AC_MSG_CHECKING(if should build only statically linked executables)
AC_ARG_ENABLE(static_exec,
  [  --enable-static-exec    Build only statically linked executables [default=no]],
  STATIC_EXEC=$enableval)

if test "X$STATIC_EXEC" = "Xyes"; then
  echo "yes"
  LT_STATIC_EXEC="-all-static"
else
  echo "no"
  LT_STATIC_EXEC=""
fi
AC_SUBST(LT_STATIC_EXEC)

dnl ----------------------------------------------------------------------
dnl Test for 64bit stuff before the data types and their sizes. The
dnl result could effect the outcome of the sizeof macros below.
dnl
case "$host_cpu-$host_vendor-$host_os" in
  *linux*)
    dnl ----------------------------------------------------------------------
    dnl Enable large file support on linux? Store the result in the LINUX_LFS
    dnl variable for posterity
    AC_ARG_ENABLE([linux-lfs],
                  [AC_HELP_STRING([--enable-linux-lfs],
                                  [Enable support for large (64-bit)
                                   files on Linux. [default=check]])])

    LINUX_LFS="no"
    case "X-$enable_linux_lfs" in
      X-yes)
        LINUX_LFS=yes
        ;;
      X-no)
        ;;
      X-|*)
        MAJOR_VER="`uname -r | cut -d '.' -f1`"
        MINOR_VER="`uname -r | cut -d '.' -f2`"

        if test ${MAJOR_VER} -gt 2 -o ${MAJOR_VER} -eq 2 -a ${MINOR_VER} -ge 4; then
          LINUX_LFS="yes"
        fi
        ;;
    esac

    AC_MSG_CHECKING([for large file support mode on Linux])
    if test "X$LINUX_LFS" = "Xyes"; then
      AC_MSG_RESULT([enabled])
      CPPFLAGS="-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE $CPPFLAGS"
    else
      AC_MSG_RESULT([disabled])
    fi

    dnl Add POSIX support on Linux systems, so <features.h> defines
    dnl __USE_POSIX, which is required to get the prototype for fdopen
    dnl defined correctly in <stdio.h>
    CPPFLAGS="-D_POSIX_SOURCE $CPPFLAGS"

    dnl Also add BSD support on Linux systems, so <features.h> defines
    dnl __USE_BSD, which is required to get the prototype for strdup
    dnl defined correctly in <string.h> and snprintf & vsnprintf defined
    dnl correctly in <stdio.h>
    CPPFLAGS="-D_BSD_SOURCE $CPPFLAGS"
    ;;
esac

dnl ----------------------------------------------------------------------
dnl Check for a Fortran 9X compiler, how to optimize it, and how to
dnl include modules.
dnl 
AC_PROG_F9X
dnl AC_F9X_OPT_FLAGS
AC_F9X_MODS

dnl Change back to the C language
AC_LANG_C

dnl ----------------------------------------------------------------------
dnl Checks for libraries.
dnl

dnl ----------------------------------------------------------------------
dnl Is the GNU zlib present? It has a header file `zlib.h' and a library
dnl `-lz' and their locations might be specified with the `--with-zlib'
dnl command-line switch. The value is an include path and/or a library path.
dnl If the library path is specified then it must be preceded by a comma.
dnl
AC_ARG_WITH([zlib],
            [AC_HELP_STRING([--with-zlib=DIR],
                            [Use GNU zlib compression [default=yes]])],,
            withval=yes)

case $withval in
  yes)
    HAVE_ZLIB="yes"
    AC_CHECK_HEADERS([zlib.h], [HAVE_ZLIB_H="yes"])
    AC_CHECK_LIB([z], [compress2],, [unset HAVE_ZLIB])
    AC_CHECK_FUNC([compress2], [HAVE_COMPRESS2="yes"])

    if test -z "$HAVE_ZLIB" -a -n "$HDF5_CONFIG_ABORT"; then
      AC_MSG_ERROR([couldn't find zlib library])
    fi
    ;;
  no)
    HAVE_ZLIB="no"
    AC_MSG_CHECKING([for GNU zlib])
    AC_MSG_RESULT([suppressed])
    ;;
  *)
    HAVE_ZLIB="yes"
    case "$withval" in
      *,*)
        zlib_inc="`echo $withval |cut -f1 -d,`"
        zlib_lib="`echo $withval |cut -f2 -d, -s`"
        ;;
      *)
        if test -n "$withval"; then
          zlib_inc="$withval/include"
          zlib_lib="$withval/lib"
        fi
        ;;
    esac

    dnl Trying to include -I/usr/include and -L/usr/lib is redundant and
    dnl can mess some compilers up.
    if test "X$zlib_inc" = "X/usr/include"; then
      zlib_inc=""
    fi
    if test "X$zlib_lib" = "X/usr/lib"; then
      zlib_lib=""
    fi

    saved_CPPFLAGS="$CPPFLAGS"
    saved_LDFLAGS="$LDFLAGS"

    if test -n "$zlib_inc"; then
      CPPFLAGS="$CPPFLAGS -I$zlib_inc"
    fi

    AC_CHECK_HEADERS([zlib.h],
                     [HAVE_ZLIB_H="yes"],
                     [CPPFLAGS="$saved_CPPFLAGS"])

    if test -n "$zlib_lib"; then
      LDFLAGS="$LDFLAGS -L$zlib_lib"
    fi

    AC_CHECK_LIB([z], [compress2],,
                 [LDFLAGS="$saved_LDFLAGS"; unset HAVE_ZLIB])
    AC_CHECK_FUNC([compress2], [HAVE_COMPRESS2="yes"])

    if test -z "$HAVE_ZLIB" -a -n "$HDF5_CONFIG_ABORT"; then
      AC_MSG_ERROR([couldn't find zlib library])
    fi
    ;;
esac

if test "x$HAVE_ZLIB" = "xyes" -a "x$HAVE_ZLIB_H" = "xyes" -a "x$HAVE_COMPRESS2" = "xyes"; then
  AC_DEFINE(HAVE_FILTER_DEFLATE, 1,
            [Define if support for deflate filter is enabled])
fi


dnl ----------------------------------------------------------------------
dnl Checks for header files.
dnl

dnl Checkpoint the cache
AC_CACHE_SAVE

dnl Change back to the Fortran 90 language
AC_LANG_FORTRAN9X

dnl See if the compiler will support the "-I." option
FFLAGS_saved=$FFLAGS
FFLAGS="$FFLAGS -I."

AC_MSG_CHECKING(if compiler supports -I. option)
AC_TRY_FCOMPILE([
      program conftest
      end
], AC_MSG_RESULT(yes),
   AC_MSG_RESULT(no)
   FFLAGS="$FFLAGS_saved")

dnl ----------------------------------------------------------------------
dnl The following variables are used to distinguish between building a
dnl serial and parallel library.
dnl
dnl    HAVE_PARALLEL	-- defined in H5config.h if we are building
dnl			   a parallel library even if configure wasn't
dnl			   able to find some header file or library that
dnl			   might be required. This is defined if the
dnl			   compiler looks like a parallel compiler (e.g.,
dnl			   mpif90 or mpf90) or if the user explicitly states
dnl			   that a parallel library is being built by supplying
dnl			   the `--enable-parallel' configure switch.
dnl
dnl    PARALLEL		-- This variable is set to a non-null value if
dnl			   configure thinks we're compiling a parallel
dnl			   version of the library.
dnl
dnl    RUNSERIAL	-- This is a command which will be prepended to
dnl			   the executable name to run the executable using
dnl			   a single process. For serial versions of the
dnl			   library this will normally be empty. For parallel
dnl			   versions it might be something like `mpirun -np 1'.
dnl			   The value of this variable is substituted in *.in
dnl			   files.
dnl
dnl    RUNPARALLEL	-- This is a command which will be prepended to
dnl			   the executable name to run the executable on
dnl			   multiple processors. For the serial library the
dnl			   value will normally be the empty string. For
dnl			   parallel library it should be something like
dnl			   `mpi -np $$NPROCS' where NPROCS will eventually
dnl			   contain the number of processors on which to run
dnl			   the executable (the double dollarsigns are to
dnl			   protect the expansion until make executes the
dnl			   command).  The value of this variable is
dnl			   substituted in *.in files.
dnl
AC_SUBST(PARALLEL)
AC_SUBST(RUNSERIAL)
AC_SUBST(RUNPARALLEL)
AC_SUBST(TESTPARALLEL)

dnl ----------------------------------------------------------------------
dnl If the compiler is obviously a parallel compiler then we're building
dnl a parallel version of hdf5 and should define HAVE_PARALLEL. Furthermore,
dnl the name of the compiler might tell us how to run the resulting
dnl executable. For `mpif90' the executable should be run with `mpirun'
dnl from the same directory as mpif90 if it exists.
dnl
case "$F9X" in
  *mpif90*)
    dnl The mpich compiler. Use mpirun from the same directory if it
    dnl exists.
    PARALLEL=mpif90
    AC_MSG_CHECKING(for mpirun)

    dnl Find the path where mpif90 is located.
    cmd=`echo $F9X |cut -f1 -d' '`
    if (echo $cmd |grep / >/dev/null); then
      path="`echo $cmd |sed 's/\(.*\)\/.*$/\1/'`"
    else
      for path in `echo $PATH |tr : ' '`; do
        if test -x $path/$cmd; then
          break;
        fi
      done
    fi

    dnl Is there an mpirun at that path?
    if test -x $path/mpirun; then
      AC_MSG_RESULT($path/mpirun)
      RUNSERIAL="${RUNSERIAL:-none}"

      if test -z "$RUNPARALLEL"; then
        RUNPARALLEL="$path/mpirun -np \$\${NPROCS:=2}"
      fi
    else
      AC_MSG_RESULT(none)
    fi
    ;;

  *mpxlf* | *mpxlf_r* | *mpxlf90* | *mpxlf90_r* | *mpxlf95* | *mpxlf95_r*)
    dnl The IBM compiler
    PARALLEL="$F9X"
    ;;

  *)
    dnl Probably not a parallel compiler, but if `--enable-parallel'
    dnl is defined below then we're still building a parallel hdf5.
    ;;
esac

dnl ----------------------------------------------------------------------
dnl Turn on internal I/O filters by setting macros in header files
dnl Internal I/O filters are contained entirely within the library and do
dnl not depend on external headers or libraries.  The shuffle filter is
dnl an example of an internal filter, while the gzip filter is an example of
dnl an external filter.  Each external filter is controlled with an
dnl "--with-foo=" configure flag.
dnl
AC_MSG_CHECKING(for I/O filters)
AC_ARG_ENABLE([filters],
              [AC_HELP_STRING([--enable-filters=all],
                              [Turn on all internal I/O filters. One may
                               also specify a comma-separated list of filters
                               or the word no.  The default is all internal
                               I/O filters.])],
              [FILTERS=$enableval])

AC_SUBST([FILTERS])
dnl Eventually: all_filters="shuffle,foo,bar,baz"
all_filters="shuffle,fletcher32"
case "X-$FILTERS" in
  X-|X-all)
    FILTERS=$all_filters
    AC_MSG_RESULT(all ($FILTERS))
    ;;
  X-no|X-none)
    AC_MSG_RESULT(none)
    FILTERS="none"
    ;;
  *)
    AC_MSG_RESULT($FILTERS)
    ;;
esac

if test -n "$FILTERS"; then
  for filter in `echo $FILTERS | tr 'a-z,' 'A-Z '`; do
dnl ----------------------------------------------------------------------
dnl Have to use separate 'if' construct for each filter, so that autoheader
dnl can detect the AC_DEFINE for each one...
dnl
    if test $filter = "SHUFFLE"; then
        AC_DEFINE(HAVE_FILTER_SHUFFLE, 1,
                [Define if support for shuffle filter is enabled])
    fi
    if test $filter = "FLETCHER32"; then
        AC_DEFINE(HAVE_FILTER_FLETCHER32, 1,
                [Define if support for Fletcher32 checksum is enabled])
    fi
  done
fi

dnl ----------------------------------------------------------------------
dnl What header files and libraries do we have to look for for parallel
dnl support?  For the most part, search paths are already specified with
dnl CPPFLAGS and LDFLAGS or are known to the compiler.  If the user says
dnl `--disable-parallel' but specifies a known parallel compiler (like mpicc
dnl or mpcc) then parallel support is enabled but configure doesn't search
dnl for any parallel header files or libraries.
dnl
AC_ARG_ENABLE([parallel],
              [AC_HELP_STRING([--enable-parallel],
                              [Search for MPI-IO and MPI support files])])

AC_MSG_CHECKING(for parallel support files)
case "X-$enable_parallel" in
  X-|X-no|X-none)
    dnl Either we are not compiling for parallel or the header and library
    dnl files and locations are known to the compiler (this is the case
    dnl for a correct installation of mpicc for instance).
    AC_MSG_RESULT(skipped)
    ;;

  X-yes)
    dnl We want to compile a parallel library with a compiler that
    dnl may already know how to link with MPI and MPI-IO.
    AC_MSG_RESULT(provided by compiler)
    PARALLEL=yes

    dnl Try link a simple MPI program.  If fail, try again with -lmpi.
    AC_TRY_FLINK(mpif.h, [
        call mpi_file_open( ierr )],,
        AC_CHECK_FLIB(mpi, [
          include 'mpif.h'
          call mpi_file_open( ierr )],, PARALLEL=no))

    dnl Then try link a simple MPI-IO program.  If fail, try again with
    dnl -lmpio.
    if test "X$PARALLEL" = "Xyes"; then
      AC_TRY_FLINK(mpif.h, [
          call mpi_file_open( ierr )],,
          AC_CHECK_FLIB(mpio, [
            include 'mpif.h'
            call mpi_file_open( ierr )],, PARALLEL=no))
    fi

    dnl Set RUNPARALLEL to mpirun if not set yet.
    if test "X$PARALLEL" = "Xyes" && test -z "$RUNPARALLEL"; then
      RUNPARALLEL="mpirun -np \$\${NPROCS:=2}"
    fi
    ;;

  X-mpich)
    dnl For normal mpich installation the compiler, mpicc, should know
    dnl where the MPI and MPI-IO header files are located and know which
    dnl extra libraries need to be linked and will supply appropriate
    dnl flags to the underlying compiler.
    AC_MSG_RESULT(mpich)
    AC_MSG_WARN(*** Why aren't you using an mpicc compiler? ***)

    dnl Apparently mpicc isn't installed correctly so configure must
    dnl search for the header files and libraries. Actually we only
    dnl have to search for the libraries in order to get the onto the
    dnl link line, the user will have already told us about the
    dnl locations. Fail if something is missing.
    PARALLEL=mpich
    AC_CHECK_FLIB(fmpich, [
        include 'mpif.h'
        call mpi_file_open( ierr )],, AC_MSG_ERROR(no mpich library))
    ;;

  *)
    AC_MSG_RESULT(error)
    AC_MSG_ERROR(\'$enable_parallel\' is not a valid parallel search type)
    ;;
esac

dnl ----------------------------------------------------------------------
dnl Should the `testpar' directory participate in the build?
dnl
if test -n "$PARALLEL"; then
  TESTPARALLEL=testpar
fi

dnl ----------------------------------------------------------------------
dnl Print some other parallel information and do some sanity checks.
dnl
ADD_PARALLEL_FILES="no"
if test -n "$PARALLEL"; then
  dnl Display what we found about running programs
  AC_MSG_CHECKING(prefix for running on one processor)
  AC_MSG_RESULT($RUNSERIAL)
  AC_MSG_CHECKING(prefix for running in parallel)
  AC_MSG_RESULT($RUNPARALLEL)

  dnl Check that we can link a simple MPI and MPI-IO application
  AC_MSG_CHECKING(whether a simple MPI-IO program can be linked)
  AC_TRY_FLINK(mpif.h,[
      call mpi_file_open( ierr )],
            AC_MSG_RESULT(yes),
            AC_MSG_RESULT(no)
            AC_MSG_ERROR('unable to link a simple MPI-IO application'))

  dnl There *must* be some way to run in parallel even if it's just the
  dnl word `none'.
  if test -z "$RUNPARALLEL"; then
    AC_MSG_ERROR(no way to run a parallel program)
  fi

  dnl If RUNSERIAL or RUNPARALLEL is the word `none' then replace it with
  dnl the empty string.
  if test "X$RUNSERIAL" = "Xnone"; then
    RUNSERIAL=
  fi
  if test "X$RUNPARALLEL" = "Xnone"; then
    RUNPARALLEL=
  fi

  ADD_PARALLEL_FILES="yes"

  AC_MSG_CHECKING([for MPI_Comm_c2f and MPI_Comm_f2c functions])

  dnl Change to the C language
  AC_LANG_C

  AC_TRY_LINK([
#include <mpi.h>
  ],
    [MPI_Comm c_comm; MPI_Comm_c2f(c_comm)],
    AC_DEFINE(HAVE_MPI_MULTI_LANG_Comm, 1,
              [Define if \`MPI_Comm_c2f' and \`MPI_Comm_f2c' exists])
    AC_MSG_RESULT(yes),
    AC_MSG_RESULT(no)
  )

  AC_MSG_CHECKING([for MPI_Info_c2f and MPI_Info_f2c functions])
  AC_TRY_LINK([
#include <mpi.h>
  ],
    [MPI_Info c_info; MPI_Info_c2f(c_info)],
    AC_DEFINE(HAVE_MPI_MULTI_LANG_Info, 1,
              [Define if \`MPI_Info_c2f' and \`MPI_Info_f2c' exists])
    AC_MSG_RESULT(yes),
    AC_MSG_RESULT(no)
  )

  dnl Change to the Fortran 90 language
  AC_LANG_FORTRAN9X
fi
AC_SUBST(ADD_PARALLEL_FILES)

AC_MSG_CHECKING(make)
AC_SUBST_FILE(DEPEND)
if test "`${MAKE-make} --version -f /dev/null 2>/dev/null |\
      sed -n 1p|cut -c1-8`" = "GNU Make"; then
  AC_MSG_RESULT(GNU make)
  GMAKE=yes
  if test "X$GCC" = "Xyes"; then
    DEPEND=config/depend1
  else
    DEPEND=config/depend2
  fi
else
  AC_MSG_RESULT(generic)
fi

dnl How do we include another file into a Makefile?
if test -z "$DEPEND"; then
  AC_MSG_CHECKING(how to include a makefile)

  dnl The include file contains the target for `foo'
  cat >makeinc <<EOF
foo:
	@:
EOF

  while true; do dnl for break
    dnl pmake. We have to be careful because some pmake think that the
    dnl contents of the MAKE environment variable is a target.
    echo '.include <makeinc>' >maketest
    if (MAKE= ${MAKE-make} -f maketest foo) >/dev/null 2>&1; then
      AC_MSG_RESULT([.include <FILE>])
      DEPEND=config/depend3
      break
    fi
 
    dnl Most make's use `include FILE'
    echo 'include makeinc' >maketest
    if (${MAKE-make} -f maketest foo) >/dev/null 2>&1; then
      AC_MSG_RESULT(include FILE)
      DEPEND=config/depend4
      break;
    fi

    dnl default
    AC_MSG_RESULT(you have a deficient make command)
    DEPEND=config/dependN
    break
  done
  rm makeinc maketest
fi

dnl Some cleanup stuff
rm -f conftest core core.* *.core conftest.o conftest.c dummy.o $ac_clean_files

dnl ----------------------------------------------------------------------
dnl Determine the runtime libraries we may need to include in the
dnl libtools command so that executables will find the correct dynamic
dnl libraries.
dnl 
AC_SUBST(DYNAMIC_DIRS) DYNAMIC_DIRS=""
if test -n "$LDFLAGS"; then
  for d in $LDFLAGS ; do
    case "$d" in
      -L*)
        d=`echo $d | sed -e 's/-L//g'`
        case "$d" in
          .*)
            dnl If the path isn't absolute, make it so by prepending the
            dnl ROOT directory to it.
            d=${ROOT}/$d
            ;;
        esac
        DYNAMIC_DIRS="-R${d} $DYNAMIC_DIRS"
        ;;
    esac
  done
fi

dnl ----------------------------------------------------------------------
dnl Build the Makefiles.  Almost every Makefile.in will begin with the line
dnl `@COMMENCE@' and end with the line `@CONCLUDE@'.  These lines insert
dnl various files from the config directory into the Makefile.
dnl
AC_SUBST_FILE(COMMENCE) COMMENCE=config/commence
AC_SUBST_FILE(CONCLUDE) CONCLUDE=config/conclude

dnl The directory search list
if test -z "$SEARCH"; then
  AC_SUBST(SEARCH) SEARCH='$(srcdir) $(top_builddir)/src $(top_srcdir)/src'
  cmd='echo $SEARCH |sed "s/ /'$SEARCH_SEP'/g"'
  SEARCH="$SEARCH_RULE`eval $cmd`"
fi

dnl We don't need to say when we're entering directories if we're using
dnl GNU make becuase make does it for us.
if test "X$GMAKE" = "Xyes"; then
  AC_SUBST(SETX) SETX=":"
else
  AC_SUBST(SETX) SETX="set -x"
fi

dnl Some cleanup stuff
rm -f conftest conftest.o conftest.c core core.* *.core dummy.o

dnl Build config.status, touch the stamp files, and build all the Makefiles.
dnl The order is such that the first `make' does not need to update any
dnl configuration information. See config/commence.in for the order in which
dnl things need to be done.

dnl First the stamp1 file for H5config.h.in
mkdir ./config >/dev/null 2>&1
touch ./config/stamp1

PARALLEL_MAKE=

if test -n "$TESTPARALLEL"; then
  PARALLEL_MAKE=$TESTPARALLEL/Makefile
fi

dnl Then the config.status file (but not makefiles)
saved_no_create=$no_create
no_create=yes
AC_CONFIG_FILES([config/depend1    
                 config/depend2
                 config/depend3
                 config/depend4
                 config/dependN
                 config/commence
                 config/conclude
                 Makefile
                 src/H5fortran_types.f90
                 src/Makefile
                 test/Makefile
                 $PARALLEL_MAKE
                 examples/Makefile])
AC_OUTPUT
no_create=$saved_no_create

dnl Then the stamp2 file for H5config_fortran.h
touch ./config/stamp2

dnl Finally the makefiles
test "$no_create" = yes || ${CONFIG_SHELL-/bin/sh} $CONFIG_STATUS || exit 1