hdf5/configure.in

dnl Process this file with autoconf to produce configure.
dnl
dnl Copyright (C) 1997 National Center for Supercomputing Applications.
dnl                    All rights reserved.

dnl ----------------------------------------------------------------------
dnl Initialize configure.
dnl
AC_REVISION($Id$)
AC_INIT(src/H5.c)
AC_CONFIG_HEADER(src/H5config.h)
AC_CONFIG_AUX_DIR(bin)
AC_CANONICAL_HOST
AC_SUBST(CPPFLAGS)

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

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 $hdf5_cv_host = "none"; then
   hdf5_cv_host=$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 $host_os in
    aix4.*)
	host_os_novers=aix4.x
	;;
    freebsd*)
	host_os_novers=freebsd
	;;
    irix5.*)
	host_os_novers=irix5.x
	;;
    irix6.*)
	host_os_novers=irix6.x
	;;
    osf4.*)
	host_os_novers=osf4.x
	;;
    solaris2.*)
	host_os_novers=solaris2.x
	;;
    *)
	host_os_novers=$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 $f)
   if test -f config/$f; then
      host_config=config/$f
      AC_MSG_RESULT(found)
      break
   fi
   AC_MSG_RESULT(no)
done
if test $host_config != "none"; 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
CC_BASENAME="`echo $CC |cut -f1 -d' ' |xargs basename 2>/dev/null`"
AC_PROG_MAKE_SET
AC_PROG_INSTALL
AM_PROG_LIBTOOL

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

AC_MSG_CHECKING(for GNU Make)
if test "`${MAKE-make} --version -f /dev/null 2>/dev/null |\
  sed -n 1p|cut -c1-8`" = "GNU Make"; then
   AC_MSG_RESULT(yes)
   GMAKE=yes
else
   AC_MSG_RESULT(no)
fi

dnl ----------------------------------------------------------------------
dnl Turn on warning flags for gcc.
dnl
if test Xyes = "X$GCC"; then
   CFLAGS="$CFLAGS -Wall -W -Wshadow -Wpointer-arith -Wbad-function-cast -Wcast-qual -Wcast-align -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Winline"
fi

dnl ----------------------------------------------------------------------
dnl Production flags?
dnl
AC_MSG_CHECKING(for production mode)
AC_ARG_ENABLE(production,
  [  --enable-production     Determines how to run the compiler.])

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

dnl ----------------------------------------------------------------------
dnl Check for system libraries.
dnl
AC_CHECK_LIB(m,ceil)
AC_CHECK_LIB(nsl,xdr_int)	dnl ...for Solaris and hdf4
AC_CHECK_LIB(coug,main)		dnl ...for ASCI/Red
AC_CHECK_LIB(jpeg,main)		dnl ...required for linking hdf4 apps

dnl ----------------------------------------------------------------------
dnl Check for system header files.
dnl
AC_HEADER_STDC
AC_HEADER_TIME
dnl Unix
AC_CHECK_HEADERS(sys/resource.h sys/time.h unistd.h sys/ioctl.h sys/stat.h)
AC_CHECK_HEADERS(stddef.h setjmp.h)
dnl Windows
AC_CHECK_HEADERS(io.h winsock.h sys/timeb.h)

case $host in
    alpha*-dec*-osf*)
	dnl The <sys/sysinfo.h> and <sys/proc.h> are needed on the DEC
	dnl Alpha to turn off UAC fixing. We do *not* attempt to
	dnl locate these files on other systems because there are too
	dnl many problems with including them.
	AC_CHECK_HEADERS(sys/sysinfo.h sys/proc.h)
	;;
esac

dnl ----------------------------------------------------------------------
dnl Data types and their sizes.
dnl
AC_TYPE_OFF_T
AC_CHECK_TYPE(size_t, unsigned long)
AC_CHECK_TYPE(ssize_t, long)
AC_C_BIGENDIAN
AC_CHECK_SIZEOF(char, 1)
AC_CHECK_SIZEOF(short, 2)
AC_CHECK_SIZEOF(int, 4)
AC_CHECK_SIZEOF(long, 4)
AC_CHECK_SIZEOF(long long, 8)
AC_CHECK_SIZEOF(__int64, 8)
AC_CHECK_SIZEOF(float, 4)
AC_CHECK_SIZEOF(double, 8)
AC_CHECK_SIZEOF(long double, 8)

dnl Posix.1g types
cat >>confdefs.h <<\EOF
#include <sys/types.h>
EOF
AC_CHECK_SIZEOF(  int8_t, 1)
AC_CHECK_SIZEOF( uint8_t, 1)
AC_CHECK_SIZEOF( int16_t, 2)
AC_CHECK_SIZEOF(uint16_t, 2)
AC_CHECK_SIZEOF( int32_t, 4)
AC_CHECK_SIZEOF(uint32_t, 4)
AC_CHECK_SIZEOF( int64_t, 8)
AC_CHECK_SIZEOF(uint64_t, 8)

AC_CHECK_SIZEOF(size_t, 4)
cat >>confdefs.h <<\EOF
#include <sys/types.h> /*for off_t definition*/
EOF
AC_CHECK_SIZEOF(off_t, 4)

AC_ARG_ENABLE(hsizet,
  [  --disable-hsizet        Datasets can normally be larger than memory
                          and/or files but some compilers are unable to
                          handle this (including versions of GCC before
                          2.8.0).  Disabling the feature causes dataset
                          sizes to be restricted to the size of core memory,
                          or 'size_t'.],
  HSIZET=$enableval)
AC_MSG_CHECKING(for sizeof hsize_t and hssize_t)
case $HSIZET in
    no|small)
	AC_MSG_RESULT(small)
	;;
    *)
        AC_MSG_RESULT(large)
        AC_DEFINE(HAVE_LARGE_HSIZET)
	;;
esac

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 `--enable-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,[  --with-zlib=INC,LIB     Use the GNU zlib compression],
            ,withval=yes)
case $withval in
    yes)
	AC_CHECK_HEADERS(zlib.h)
	AC_CHECK_LIB(z, compress)
	;;
    no)
	AC_MSG_CHECKING(for GNU zlib)
	AC_MSG_RESULT(suppressed)
	;;
    *)
	zlib_inc="`echo $withval |cut -f1 -d,`"
	if test "X" != "$zlib_inc"; then
	    saved_CPPFLAGS="$CPPFLAGS"
	    CPPFLAGS="$CPPFLAGS -I$zlib_inc"
	    AC_CHECK_HEADERS(zlib.h,,CPPFLAGS="$saved_CPPFLAGS")
        else
	    AC_CHECK_HEADERS(zlib.h)
	fi

	zlib_lib="`echo $withval |cut -f2 -d, -s`"
	if test "X" != "$zlb_lib"; then
	    saved_LDFLAGS="$LDFLAGS"
	    LDFLAGS="$LDFLAGS -L$zlib_lib"
	    AC_CHECK_LIB(z, compress,,LDFLAGS="$saved_LDFLAGS")
	else
	    AC_CHECK_LIB(z, compress)
	fi
	;;
esac
	
dnl ----------------------------------------------------------------------
dnl Is HDF4 present?  If so then we can compile the h5toh4 converter. We
dnl assume h5toh4 can be compiled and then prove otherwise when we don't find
dnl a header file or library.
dnl
AC_SUBST(H5TOH4)
H5TOH4=h5toh4
AC_SUBST(TESTH5TOH4)
TESTH5TOH4=testh5toh4

AC_ARG_WITH(hdf4,[  --with-hdf4=INC,LIB     Use the HDF4 library],,withval=yes)
case $withval in
    yes)
	AC_CHECK_HEADERS(mfhdf.h,,unset H5TOH4 TESTH5TOH4)
	AC_CHECK_LIB(df,main,,unset H5TOH4 TESTH5TOH4)
	AC_CHECK_LIB(mfhdf,main,,unset H5TOH4 TESTH5TOH4)
	;;
    no)
	AC_MSG_CHECKING(for HDF4)
	AC_MSG_RESULT(suppressed)
	unset H5TOH4 TESTH5TOH4
	;;
    *)
	hdf4_inc="`echo $withval |cut -f1 -d,`"
	if test "X" != "$hdf4_inc"; then
	    saved_CPPFLAGS="$CPPFLAGS"
	    CPPFLAGS="$CPPFLAGS -I$hdf4_inc"
	    AC_CHECK_HEADERS(mfhdf.h,,
	        CPPFLAGS="$saved_CPPFLAGS"
	        unset H5TOH4 TESTH5TOH4
            )
	else
	    AC_CHECK_HEADERS(mfhdf.h)
	fi
	
	hdf4_lib="`echo $withval |cut -f2 -d, -s`"
	if test "X" != "$hdf4_lib"; then
	    saved_LDFLAGS="$LDFLAGS"
	    LDFLAGS="$LDFLAGS -L$hdf4_lib"
	    AC_CHECK_LIB(df,main,,unset H5TOH4 TESTH5TOH4)
	    AC_CHECK_LIB(mfhdf,main,,unset H5TOH4 TESTH5TOH4)
	else
	    AC_CHECK_LIB(df,main)
	    AC_CHECK_LIB(mfhdf,main)
	fi
	;;
esac


dnl ----------------------------------------------------------------------
dnl How does one figure out the local time zone?  Anyone know of a
dnl Posix way to do this?
dnl

dnl First check if `struct tm' has a `tm_gmtoff' member.
AC_MSG_CHECKING(for tm_gmtoff in struct tm)
AC_TRY_COMPILE([
#include <sys/time.h>
#include <time.h>],[struct tm tm; tm.tm_gmtoff=0;],
AC_DEFINE(HAVE_TM_GMTOFF)
AC_MSG_RESULT(yes),
AC_MSG_RESULT(no))

dnl check if `struct tm' has a `__tm_gmtoff' member.
AC_MSG_CHECKING(for __tm_gmtoff in struct tm)
AC_TRY_COMPILE([
#include <sys/time.h>
#include <time.h>],[struct tm tm; tm.__tm_gmtoff=0;],
AC_DEFINE(HAVE___TM_GMTOFF)
AC_MSG_RESULT(yes),
AC_MSG_RESULT(no))

dnl Check whether the global variable `timezone' is defined.
AC_MSG_CHECKING(for global timezone variable)
AC_TRY_LINK([
#include <sys/time.h>
#include <time.h>], [timezone=0;],
AC_DEFINE(HAVE_TIMEZONE)
AC_MSG_RESULT(yes),
AC_MSG_RESULT(no))

dnl Check whether `struct timezone' is defined.
AC_STRUCT_TIMEZONE
AC_MSG_CHECKING(for struct timezone)
AC_TRY_COMPILE([
#include <sys/types.h>
#include <sys/time.h>
#include <time.h>],[struct timezone tz; tz.tz_minuteswest=0;],
AC_DEFINE(HAVE_STRUCT_TIMEZONE)
AC_MSG_RESULT(yes),
AC_MSG_RESULT(no))

dnl ----------------------------------------------------------------------
dnl Does the struct stat have the st_blocks field?  This field is not Posix.
dnl
AC_MSG_CHECKING(for st_blocks in struct stat)
AC_TRY_COMPILE([
#include <sys/stat.h>],[struct stat sb; sb.st_blocks=0;],
AC_DEFINE(HAVE_STAT_ST_BLOCKS)
AC_MSG_RESULT(yes),
AC_MSG_RESULT(no))

dnl ----------------------------------------------------------------------
dnl How do we figure out the width of a tty in characters?
dnl
AC_CHECK_FUNCS(_getvideoconfig gettextinfo GetConsoleScreenBufferInfo)
AC_CHECK_FUNCS(_scrsize ioctl)

AC_MSG_CHECKING(for struct videoconfig)
AC_TRY_COMPILE(,[struct videoconfig w; w.numtextcols=0;],
AC_DEFINE(HAVE_STRUCT_VIDEOCONFIG)
AC_MSG_RESULT(yes),
AC_MSG_RESULT(no))

AC_MSG_CHECKING(for struct text_info)
AC_TRY_COMPILE(,[struct text_info w; w.screenwidth=0;],
AC_DEFINE(HAVE_STRUCT_TEXT_INFO)
AC_MSG_RESULT(yes),
AC_MSG_RESULT(no))

AC_MSG_CHECKING(for TIOCGWINSZ)
AC_TRY_COMPILE([#include <sys/ioctl.h>],[int w=TIOCGWINSZ;],
AC_DEFINE(HAVE_TIOCGWINSZ)
AC_MSG_RESULT(yes),
AC_MSG_RESULT(no))

AC_MSG_CHECKING(for TIOCGGETD)
AC_TRY_COMPILE([#include <sys/ioctl.h>],[int w=TIOCGETD;],
AC_DEFINE(HAVE_TIOCGETD)
AC_MSG_RESULT(yes),
AC_MSG_RESULT(no))


dnl ----------------------------------------------------------------------
dnl Check for functions.
dnl
AC_CHECK_FUNCS(getpwuid gethostname system getrusage fork waitpid)
AC_CHECK_FUNCS(gettimeofday BSDgettimeofday difftime snprintf)
AC_CHECK_FUNCS(compress2 setsysinfo longjmp signal sigaction)
AC_TRY_COMPILE([#include<sys/types.h>],
	       [off64_t n = 0;],
	       AC_CHECK_FUNCS(lseek64 fseek64),
	       AC_MSG_RESULT([skipping test for lseek64() and fseek64()]))


dnl ----------------------------------------------------------------------
dnl Check compiler characteristics
dnl

AC_C_CONST
AC_C_INLINE

AC_MSG_CHECKING(for __attribute__ extension)
AC_TRY_COMPILE(,[int __attribute__((unused)) x],
		     AC_DEFINE(HAVE_ATTRIBUTE)
		     AC_MSG_RESULT(yes),
		     AC_MSG_RESULT(no))

AC_MSG_CHECKING(for __FUNCTION__ extension)
AC_TRY_COMPILE(,[(void)__FUNCTION__],
		     AC_DEFINE(HAVE_FUNCTION)
		     AC_MSG_RESULT(yes),
		     AC_MSG_RESULT(no))

dnl ----------------------------------------------------------------------
dnl Try to figure out how to print `long long'.  Some machines use `%lld'
dnl and others use `%qd'.  There may be more!  The final `l' is a
dnl default in case none of the others work.
dnl
AC_MSG_CHECKING(how to print long long)
AC_CACHE_VAL(hdf5_cv_printf_ll,
             for hdf5_cv_printf_ll in l L q ll unknown; do
                AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
                  main() {char *s=malloc(128);
	             long long x = (long long)1048576 * (long long)1048576;
	             sprintf(s,"%${hdf5_cv_printf_ll}d",x);
	             exit (strcmp(s,"1099511627776"));}],
		 break)
	     done)
AC_MSG_RESULT(%${hdf5_cv_printf_ll}d and %${hdf5_cv_printf_ll}u)
AC_DEFINE_UNQUOTED(PRINTF_LL_WIDTH,"$hdf5_cv_printf_ll")

dnl ----------------------------------------------------------------------
dnl Turn on debugging by setting compiler flags
dnl
AC_MSG_CHECKING(for debug flags)
AC_ARG_ENABLE(debug,
  [  --enable-debug[=all]    Turn on debugging in all packages.  One may also
                          specify a comma-separated list of package names
                          without the leading H5 or the word no.  The default
                          is most packages.],
  DEBUG_PKG=$enableval)

all_packages="ac,b,d,e,f,g,hg,hl,i,mf,mm,o,p,s,t,v,z"
if test X = "X$DEBUG_PKG" -o Xyes = "X$DEBUG_PKG"; then
   DEBUG_PKG=ac,b,d,e,f,g,hg,i,mm,p,s,t,v,z
   CPPFLAGS="$CPPFLAGS -UNDEBUG"
   AC_MSG_RESULT(default ($DEBUG_PKG))
elif test Xall = "X$DEBUG_PKG"; then
   DEBUG_PKG=$all_packages
   CPPFLAGS="$CPPFLAGS -UNDEBUG"
   AC_MSG_RESULT(all ($DEBUG_PKG))
elif test Xno = "X$DEBUG_PKG" -o Xnone = "X$DEBUG_PKG"; then
   AC_MSG_RESULT(none)
   DEBUG_PKG=
   CPPFLAGS="$CPPFLAGS -DNDEBUG"
else
   AC_MSG_RESULT($DEBUG_PKG)
fi

if test "X" != "X$DEBUG_PKG"; then
   for pkg in `echo $DEBUG_PKG | tr 'a-z,' 'A-Z '`; do
      CPPFLAGS="$CPPFLAGS -DH5${pkg}_DEBUG"
   done
fi

dnl ----------------------------------------------------------------------
dnl Enable tracing of the API
dnl
AC_MSG_CHECKING(for API tracing);
AC_ARG_ENABLE(trace,
  [  --disable-trace         Disable API tracing capability],
  TRACE=$enableval)

if test X = "X$TRACE" -o Xyes = "X$TRACE"; then
   AC_MSG_RESULT(yes)
   CPPFLAGS="$CPPFLAGS -DH5_DEBUG_API"
else
   AC_MSG_RESULT(no)
   CPPFLAGS="$CPPFLAGS -UH5_DEBUG_API"
fi

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			   mpicc or mpcc) 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(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 `mpicc' the executable should be run with `mpirun' from
dnl the same directory as mpicc if it exists.
dnl
case "$CC_BASENAME" in
    mpicc)
	# The mpich compiler. Use mpirun from the same directory if it
	# exists.
	PARALLEL=yes
	AC_MSG_CHECKING(for mpirun)

	# Find the path where mpicc is located.
	cmd=`echo $CC |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

	# Is there an mpirun at that path?
	if test -x $path/mpirun; then
	    AC_MSG_RESULT($path/mpirun)
	    RUNSERIAL="${RUNSERIAL:-none}"
	    if test "X-" = "X-$RUNPARALLEL"; then
	        RUNPARALLEL="$path/mpirun -np \$\${NPROCS:=2}"
	    fi
	else
	    AC_MSG_RESULT(none)
        fi
	;;

    mpcc|mpcc_r)
	# The IBM compiler
	PARALLEL=yes
	;;

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

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,
  [  --enable-parallel=TYPE  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)
	# Either we are not compiling for parallel or the header and library
	# files and locations are known to the compiler (this is the case
	# for a correct installation of mpicc for instance).
	AC_MSG_RESULT(skipped)
	;;

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

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

	# Apparently mpicc isn't installed correctly so configure must search
	# for the header files and libraries. Actually we only have to search
	# for the libraries in order to get the onto the link line, the user
	# will have already told us about the locations. Fail if something
	# is missing.
	PARALLEL=yes
	AC_CHECK_LIB(mpich,MPI_Init,,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 "X-" != "X-$PARALLEL"; then
    TESTPARALLEL=testpar
fi

dnl ----------------------------------------------------------------------
dnl Print some other parallel information and do some sanity checks.
dnl
if test "X-" != "X-$PARALLEL"; then
    # We are building a parallel library
    AC_DEFINE(HAVE_PARALLEL)

    # 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)

    # Check that we can link a simple MPI and MPI-IO application
dnl    AC_MSG_CHECKING(whether a simple MPI-IO program can be linked)
dnl    AC_TRY_LINK(,[MPI_Init();MPI_File_open();],
dnl		AC_MSG_RESULT(yes),
dnl		AC_MSG_RESULT(no)
dnl	        AC_MSG_ERROR('unable to link a simple MPI-IO application'))


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

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

if test "X$GCC" = "Xyes" && test "X$GMAKE" = "Xyes"; then
   AC_SUBST_FILE(DEPEND1) DEPEND1=config/depend
   AC_SUBST_FILE(DEPEND2) DEPEND2=/dev/null
else
   AC_SUBST_FILE(DEPEND1) DEPEND1=src/.distdep
   AC_SUBST_FILE(DEPEND2) DEPEND2=test/.distdep
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 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.
if test -x /bin/pwd; then
   pwd=/bin/pwd
else
   pwd=pwd
fi
AC_SUBST(ROOT) ROOT=`$pwd`

dnl Touch the time-stamp files for src/H5config.h.in and src/H5config.h
dnl before we generate them or the Makefiles.
touch ./config/stamp1 ./config/stamp2

AC_OUTPUT(config/depend config/commence config/conclude \
          Makefile src/Makefile pablo/Makefile test/Makefile \
          testpar/Makefile tools/Makefile examples/Makefile)