#! /bin/sh
##
# Copyright by The HDF Group.
# Copyright by the Board of Trustees of the University of Illinois.
# All rights reserved.
#
# This file is part of HDF5.  The full HDF5 copyright notice, including
# terms governing use, modification, and redistribution, is contained in
# the files COPYING and Copyright.html.  COPYING can be found at the root
# of the source code distribution tree; Copyright.html can be found at the
# root level of an installed copy of the electronic HDF5 document set and
# is linked from the top-level documents page.  It can also be found at
# http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have
# access to either file, you may request a copy from help@hdfgroup.org.
##

# This tool is adapted from the mpicc command of the MPICH Software.

############################################################################
##                                                                        ##
## Things You May Have to Modify:                                         ##
##                                                                        ##
## If the following paths don't point to the place were HDF5 is installed ##
## on your system (i.e., you received a binary distribution or moved the  ##
## files from the originally installed directory to another directory)    ##
## then modify them accordingly to represent the new paths.               ##
##                                                                        ##
############################################################################
prefix="@prefix@"
exec_prefix="@exec_prefix@"
libdir="@libdir@"
includedir="@includedir@"
HL="@HL@"

############################################################################
##                                                                        ##
## Things You Can Modify to Override HDF5 Library Build Components:       ##
##                                                                        ##
## (Advanced usage - know what you're doing - you're on your own here.)   ##
## The four variables below can be used to insert paths and flags in      ##
## CPPFLAGS, CFLAGS, LDFLAGS, or LIBS in the h5cc compile line:           ##
##    $CLINKER $H5BLD_CPPFLAGS $CPPFLAGS $H5BLD_CFLAGS $CFLAGS $LDFLAGS   ##
##    $LIBS $clibpath $link_objs $link_args $shared_link                  ##
##                                                                        ##
## These settings can be overriden by setting HDF5_CFLAGS,                ##
## HDF5_CPPFLAGS, HDF5_LDFLAGS, or HDF5_LIBS in the environment.          ##
##                                                                        ##
############################################################################
CFLAGSBASE=""
CPPFLAGSBASE=""
LDFLAGSBASE=""
LIBSBASE=""

############################################################################
##                                                                        ##
## You shouldn't have to modify anything below this line.                 ##
##                                                                        ##
############################################################################

# Constants definitions
EXIT_SUCCESS=0
EXIT_FAILURE=1

host_os="@host_os@"

prog_name="`basename $0`"

allargs=""
compile_args=""
libraries=""
link_args=""
link_objs=""
clibpath=""

do_link="yes"
do_compile="no"
dash_o="no"
dash_c="no"
get_output_file="no"

SHOW="eval"
CCBASE="@CC@"
CLINKERBASE="@CC@"

# CFLAGS, CPPFLAGS and LDFLAGS are reserved for use by the script user.
# FLAGS brought from the hdf5 build are put in H5BLD_*FLAGS.

# User's CPPFLAGS and CFLAGS come after their H5BLD counterparts.  User's 
# LDFLAGS come just before clibpath, user's LIBS come after $link_objs and 
# before the hdf5 libraries in $link_args, followed by any external library 
# paths and libraries from AM_LDFLAGS, LDFLAGS, AM_LIBS or LIBS carried in 
# from the hdf5 build. The order of the flags is intended to give precedence
# to the user's flags.
H5BLD_CFLAGS="@AM_CFLAGS@ @CFLAGS@"
H5BLD_CPPFLAGS="@AM_CPPFLAGS@ @CPPFLAGS@"
H5BLD_LDFLAGS="@AM_LDFLAGS@ @LDFLAGS@"
H5BLD_LIBS="@LIBS@"

CC="${HDF5_CC:-$CCBASE}"
CLINKER="${HDF5_CLINKER:-$CLINKERBASE}"
CFLAGS="${HDF5_CFLAGS:-$CFLAGSBASE}"
CPPFLAGS="${HDF5_CPPFLAGS:-$CPPFLAGSBASE}"
LDFLAGS="${HDF5_LDFLAGS:-$LDFLAGSBASE}"
LIBS="${HDF5_LIBS:-$LIBSBASE}"

# If a static library is available, the default will be to use it.  If the only
# available library is shared, it will be used by default.  The user can 
# override either default, although choosing an unavailable library will result
# in link errors.  
STATIC_AVAILABLE="@enable_static@"
if test "${STATIC_AVAILABLE}" = "yes"; then
  USE_SHARED_LIB="${HDF5_USE_SHLIB:-no}"
else
  USE_SHARED_LIB="${HDF5_USE_SHLIB:-yes}"
fi


usage() {
  # A wonderfully informative "usage" message.
  echo "usage: $prog_name [OPTIONS] <compile line>"
  echo "  OPTIONS:"
  echo "    -help        This help message."
  echo "    -echo        Show all the shell commands executed"
  echo "    -prefix=DIR  Prefix directory to find HDF5 lib/ and include/"
  echo "                   subdirectories [default: $prefix]"
  # A wonderfully informative "usage" message.
  echo "usage: $prog_name [OPTIONS] <compile line>"
  echo "  OPTIONS:"
  echo "    -help        This help message."
  echo "    -echo        Show all the shell commands executed"
  echo "    -prefix=DIR  Prefix directory to find HDF5 lib/ and include/"
  echo "                   subdirectories [default: $prefix]"
  echo "    -show        Show the commands without executing them"
  echo "    -showconfig  Show the HDF5 library configuration summary"
  echo "    -shlib       Compile with shared HDF5 libraries [default for hdf5 built"
  echo "                                                     without static libraries]"
  echo "    -noshlib     Compile with static HDF5 libraries [default for hdf5 built"
  echo "                                                     with static libraries]"
  echo " "
  echo "  <compile line>  - the normal compile line options for your compiler."
  echo "                    $prog_name uses the same compiler you used to compile"
  echo "                    HDF5. Check with your compiler's man pages for more"
  echo "                    information on which options are needed."
  echo " "
  echo " You can override the compiler, linker, and whether or not to use static"
  echo " or shared libraries to compile your program by setting the following"
  echo " environment variables accordingly:"
  echo " "
  echo "   HDF5_CC                  -  use a different C compiler"
  echo "   HDF5_CLINKER             -  use a different linker"
  echo "   HDF5_USE_SHLIB=[yes|no]  -  use shared or static version of the HDF5 library"
  echo "                                 [default: no except when built with only" 
  echo "                                           shared libraries]"
  echo " "
  echo " You can also add or change paths and flags to the compile line using"
  echo " the following environment varibles or by assigning them to their counterparts"
  echo " in the 'Things You Can Modify to Override...'" section of $prog_name
  echo " "
  echo "  Variable              Current value to be replaced"
  echo "  HDF5_CPPFLAGS         \"$CPPFLAGSBASE\""
  echo "  HDF5_CFLAGS           \"$CFLAGSBASE\""
  echo "  HDF5_LDFLAGS          \"$LDFLAGSBASE\""
  echo "  HDF5_LIBS             \"$LIBSBASE\""
  echo " "
  echo " Note that adding library paths to HDF5_LDFLAGS where another hdf5 version"
  echo " is located may link your program with that other hdf5 library version."
  echo " "
  exit $EXIT_FAILURE
}

# Show the configuration summary of the library recorded in the
# libhdf5.settings file reside in the lib directory.
showconfigure()
{
  cat ${libdir}/libhdf5.settings
  status=$?
}

# Main
status=$EXIT_SUCCESS

if test "$#" = "0"; then
  # No parameters specified, issue usage statement and exit.
  usage
fi

case "$CC" in
  gcc)
    kind="gcc"
    ;;
  mpicc|mpcc|mpicc_r)
    # Is this gcc masquarading as an MPI compiler?
    if test "`${CC} -v 2>&1 | sed -n 2p | cut -c1-3`" = "gcc"; then
      kind="gcc"
    else
      # Nope
      kind="$host_os"
    fi
    ;;
  *)
    kind="$host_os"
    ;;
esac

for arg in $@ ; do
  if test "x$get_output_file" = "xyes"; then
    link_args="$link_args $arg"
    output_file="$arg"
    get_output_file="no"
    continue
  fi

  case "$arg" in
    -c)
      allargs="$allargs $arg"
      compile_args="$compile_args $arg"

      if test "x$do_link" = "xyes" -a -n "$output_file"; then
        compile_args="$compile_args -o $outputfile"
      fi

      do_link="no"
      dash_c="yes"
      ;;
    -o)
      allargs="$allargs $arg"
      dash_o="yes"

      if test "x$dash_c" = "xyes"; then
        compile_args="$compile_args $arg"
      else
        link_args="$link_args $arg"
        do_link="yes"
        get_output_file="yes"
      fi
      ;;
    -E|-M|-MT)
      allargs="$allargs $arg"
      compile_args="$compile_args $arg"
      dash_c="yes"
      do_link="no"
      ;;
    -l*)
      libraries=" $libraries $arg "
      allargs="$allargs $arg"
      ;;
    -prefix=*)
      prefix="`expr "$arg" : '-prefix=\(.*\)'`"
      ;;
    -echo)
      set -x
      ;;
    -show)
      SHOW="echo"
      ;;
    -showconfig)
      showconfigure
      exit $status
      ;;
    -shlib)
      USE_SHARED_LIB="yes"
      ;;
    -noshlib)
      USE_SHARED_LIB="no"
      ;;
    -help)
      usage
      ;;
    *\"*)
      qarg="'"$arg"'"
      allargs="$allargs $qarg"
      ;;
    *\'*)
      qarg='\"'"$arg"'\"'
      allargs="$allargs $qarg"
      ;;
    *)
      allargs="$allargs $qarg"

      if test -s "$arg"; then
        ext=`expr "$arg" : '.*\(\..*\)'`

        if test "x$ext" = "x.c"; then
          do_compile="yes"
          compile_args="$compile_args $arg"
          fname=`basename $arg .c`
          link_objs="$link_objs $fname.o"
        elif test "x$ext" = "x.o"; then
          if test "x$dash_c" = "xyes"; then
            compile_args="$compile_args $arg"
          else
            do_link="yes"
            link_objs="$link_objs $arg"
          fi
        elif test "x$ext" = "x.a"; then
          # This is an archive that we're linking in
          libraries=" $libraries $arg "
        else
          compile_args="$compile_args $arg"
          link_args="$link_args $arg"
        fi
      else
        compile_args="$compile_args $arg"
        link_args="$link_args $arg"
      fi
      ;;
  esac
done

if test "$dash_c" = "yes" -a "$do_compile" = no -a "$do_link" = no ; then
    # -c was specified.  Force do_compile on.
    do_compile=yes
fi

if test "x$do_compile" = "xyes"; then
  if test "x$dash_c" != "xyes"; then
    compile_args="-c $compile_args"
  fi

  $SHOW $CC -I$includedir $H5BLD_CPPFLAGS $CPPFLAGS $H5BLD_CFLAGS $CFLAGS $compile_args
  status=$?

  if test "$status" != "0"; then
    exit $status
  fi
fi

if test "x$do_link" = "xyes"; then
  shared_link=""
# conditionnaly link with the hl library  
  if test "X$HL" = "Xhl"; then
   libraries=" $libraries -lhdf5_hl -lhdf5 "
  else
   libraries=" $libraries  -lhdf5 "
  fi
  link_args="$link_args -L${libdir}"

  case "$kind" in
    gcc|linux*)
      # MacOS X doesn't support the "-Wl,-rpath -Wl," style of linker flags.
      # It appears to want none of them specified.
      case "$host_os" in
        darwin*)          flag="" ;;
        *)                flag="-Wl,-rpath -Wl," ;;
      esac
      ;;
    hpux*)                flag="-Wl,+b -Wl," ;;
    freebsd*|solaris*)    flag="-R" ;;
    rs6000*|aix*)         flag="-L" ;;
    sgi)                  flag="-rpath " ;;
    *)                    flag="" ;;
  esac

  if test -n "$flag"; then
    shared_link="${flag}${libdir}"
  fi

  if test "x$USE_SHARED_LIB" != "xyes"; then
    # The "-lhdf5" & "-lhdf5_hl" flags are in here already...This is a static
    # compile though, so change it to the static version (.a) of the library.
    new_libraries=""
    for lib in $libraries; do
      case "$lib" in
        -lhdf5)
          new_libraries="$new_libraries ${libdir}/libhdf5.a"
          ;;
        -lhdf5_hl)
          new_libraries="$new_libraries ${libdir}/libhdf5_hl.a"
          ;;
        *)
          new_libraries="$new_libraries $lib"
          ;;
      esac
    done
    libraries="$new_libraries"
  fi

  for lib in $libraries; do
    if echo $link_args | grep " $lib " > /dev/null ||
       echo $link_args | grep " $lib$" > /dev/null; then
      :
    else
      link_args="$link_args $lib "
    fi
  done

  # The LIBS are just a bunch of -l* libraries necessary for the HDF5
  # module. It's okay if they're included twice in the compile line.
  link_args="$link_args $H5BLD_LDFLAGS $H5BLD_LIBS"

  # User's CPPFLAGS and CFLAGS come after their H5BLD counterparts.  User's 
  # LDFLAGS come just before clibpath, user's LIBS come after $link_objs and 
  # before the hdf5 libraries in $link_args, followed by any external library 
  # paths and libraries from AM_LDFLAGS, LDFLAGS, AM_LIBS or LIBS carried in 
  # from the hdf5 build. The order of the flags is intended to give precedence
  # to the user's flags.
  $SHOW $CLINKER $H5BLD_CPPFLAGS $CPPFLAGS $H5BLD_CFLAGS $CFLAGS $LDFLAGS $clibpath $link_objs $LIBS $link_args $shared_link
  status=$?
fi

exit $status
