dnl ----------------------------------------------------------------------
dnl Process this file with autoconf to produce configure.
dnl
dnl Copyright (C) 2000, 2001, 2002
dnl     National Center for Supercomputing Applications.
dnl     All rights reserved.
dnl ----------------------------------------------------------------------

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 C++], [1.5.44], [hdfhelp@ncsa.uiuc.edu])
AC_CONFIG_SRCDIR([src/H5Library.cpp])

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 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 "$host_os" in
  aix4.*)
    host_os_novers=aix4.x
    ;;
  freebsd*)
    host_os_novers=freebsd
    ;;
  irix5.*)
    host_os_novers=irix5.x
    ;;
  irix6.*)
    host_os_novers=irix6.x
    ;;
  osf4.*)
    host_os_novers=osf4.x
    ;;
  osf5.*)
    host_os_novers=osf5.x
    ;;
  solaris2.*)
    host_os_novers=solaris2.x
    ;;
  *)
    host_os_novers=$host_os
    ;;
esac

dnl Different compilers may need default libraries. They are specified in
dnl the config/* files, so we put this statement here so that it'll be
dnl set by the code which follows...
dnl
AC_SUBST(DEFAULT_LIBS) DEFAULT_LIBS=""

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
  CXX_BASENAME="`echo $CXX |cut -f1 -d' ' |xargs basename 2>/dev/null`"
  . $host_config
fi

dnl ----------------------------------------------------------------------
dnl Check for programs.
dnl
AC_PROG_CXX
AC_PROG_CXXCPP	dnl this is checked for when AC_HEADER_STDC is done
CXX_BASENAME="`echo $CXX |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.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 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,
  [  --enable-production     Determines how to run the compiler.])

case "X-$enable_production" in
  X-yes)
    AC_MSG_RESULT("production")
    CONFIG_MODE=production
    CXXFLAGS="$CXXFLAGS $PROD_CXXFLAGS"
    CPPFLAGS="$CPPFLAGS $PROD_CPPFLAGS"
    ;;
  X-|X-no)
    AC_MSG_RESULT("development")
    CONFIG_MODE=development
    CXXFLAGS="$CXXFLAGS $DEBUG_CXXFLAGS"
    CPPFLAGS="$CPPFLAGS $DEBUG_CPPFLAGS"
    ;;
  X-pg|X-profile)
    AC_MSG_RESULT("profile")
    CONFIG_MODE=profile
    CXXFLAGS="$CXXFLAGS $PROFILE_CXXFLAGS"
    CPPFLAGS="$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)

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]])])

    case "X-$enable_linux_lfs" in
      X-yes)
        LINUX_LFS=yes
        ;;
      X-no)
        LINUX_LFS=no
        ;;
      X-|*)
        LINUX_LFS=no
        AC_CHECK_FUNCS([getdents64],
            dnl Add the large file support flags to the CXXFLAGS macro if
            dnl we're on a Linux system which austensibly supports LFS. (We
            dnl think it does if it has the `getdents64' syscall).
            [LINUX_LFS=yes])
        ;;
    esac

    AC_MSG_CHECKING([for large file support on linux mode])
    if test "X$LINUX_LFS" = "Xyes"; then
      AC_MSG_RESULT([enabled])
      CXXFLAGS="-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE ${CXXFLAGS}"
    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>
    CXXFLAGS="-D_POSIX_SOURCE ${CXXFLAGS}"

    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>
    CXXFLAGS="-D_BSD_SOURCE ${CXXFLAGS}"
    ;;
esac

dnl ----------------------------------------------------------------------
dnl Checks for compiler characteristics.
dnl
AC_LANG_CPLUSPLUS

AC_MSG_CHECKING(if $CXX needs old style header files in includes)
AC_TRY_RUN([
#include <iostream>

int main(void) { return 0; }
], [
  echo no
], [
  echo yes
  CXXFLAGS="${CXXFLAGS} -DOLD_HEADER_FILENAME"
])

AC_MSG_CHECKING(if $CXX can handle namespaces)
AC_TRY_RUN([
#ifdef OLD_HEADER_FILENAME
#include <iostream.h>
#else
#include <iostream>
#endif

using namespace std;

namespace H5 {
int fnord;
}

int main(void) {
   using namespace H5;
   fnord = 37;
   return 0;
} 
], [
  echo yes
], [
  echo no
  CXXFLAGS="${CXXFLAGS} -DH5_NO_NAMESPACE"
])

AC_MSG_CHECKING(if $CXX supports bool types)
AC_TRY_RUN([
int main(void) {
   bool flag;
   return 0;
}
], [
  echo yes
], [
  echo no
  CXXFLAGS="${CXXFLAGS} -DBOOL_NOTDEFINED"
])

AC_MSG_CHECKING(if $CXX can handle static cast)
AC_TRY_RUN([
int main(void) {
   float test_float;
   int test_int;
   test_float = 37.0;
   test_int = static_cast <int> (test_float);
   return 0;
}
], [
  echo yes
], [
  echo no
  CXXFLAGS="${CXXFLAGS} -DNO_STATIC_CAST"
])

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

dnl Checkpoint the cache
AC_CACHE_SAVE

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

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