dnl ----------------------------------------------------------------------
dnl Process this file with autoconf to produce configure.
dnl
dnl Copyright (C) 2000 National Center for Supercomputing Applications.
dnl                    All rights reserved.
dnl ----------------------------------------------------------------------

dnl ----------------------------------------------------------------------
dnl Initialize configure.
dnl
AC_REVISION($Id$)
AC_INIT(src/HDF5.f90)
AC_CONFIG_HEADER(src/H5config.h)
AC_CONFIG_AUX_DIR(bin)
AC_CANONICAL_HOST
AC_SUBST(CPPFLAGS)

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 "$host_os" in
   aix4.*)
      host_os_novers=aix4.x
      ;;
   freebsd*)
      host_os_novers=freebsd
      ;;
   irix5.*)
      host_os_novers=irix5.x
      ;;
   irix6.*)
      host_os_novers=irix6.x
      ;;
   osf4.*)
      host_os_novers=osf4.x
      ;;
   solaris2.*)
      host_os_novers=solaris2.x
      ;;
   *)
      host_os_novers=$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 $srcdir/config/$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

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.o
   
foo: H5.o
	/bin/rm -f H5.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.o
   
foo: H5.o
	/bin/rm -f H5.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.o
   
foo: H5.o
	/bin/rm -f H5.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 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 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 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.
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 $withval |cut -f1 -d,`"
      if test -n "$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 $withval |cut -f2 -d, -s`"
      if test -n "$zlib_lib"; then
         saved_LDFLAGS="$LDFLAGS"
         LDFLAGS="$LDFLAGS -L$zlib_lib"
         ZLIB_DIR=$zlib_lib
         AC_CHECK_LIB(z, compress,,LDFLAGS="$saved_LDFLAGS")
      else
         AC_CHECK_LIB(z, compress)
      fi
      ;;
esac

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

dnl Checkpoint the cache
AC_CACHE_SAVE

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

      dnl 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

      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
      ;;

   mpcc|mpcc_r)
      dnl The IBM compiler
      PARALLEL="$CC_BASENAME"
      ;;

   *)
      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 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)
      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_LINK(,MPI_Init(),,AC_CHECK_LIB(mpi,MPI_Init,,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_LINK(,MPI_File_open(),,
                     AC_CHECK_LIB(mpio,MPI_File_open,,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_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 -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 We are building a parallel library
   AC_DEFINE(HAVE_PARALLEL)

   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_LINK(,[MPI_Init();MPI_File_open();],
               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"
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 
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
AC_SUBST(DYNAMIC_DIRS)

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

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

dnl Then the stamp2 file for H5config.h
touch ./config/stamp2

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