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/H5Library.C)
dnl AC_CONFIG_HEADER(config.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 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
   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

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 Checks for compiler characteristics.
dnl
AC_LANG_CPLUSPLUS

AC_MSG_CHECKING(if $CXX can handle namespaces)
AC_TRY_RUN([
using namespace std;

namespace H5 {

int main(void) { return 0; } 

}
], [
echo yes
], [
echo no
CXXFLAGS="${CXXFLAGS} -DH5_NO_NAMESPACE"
])

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"
])

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 -rf conftest* confdefs* 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=$no_create
no_create=yes
AC_OUTPUT(config/depend1 config/depend2 config/depend3 config/depend4	\
	  config/dependN config/commence config/conclude Makefile	\
	  src/Makefile test/Makefile examples/Makefile)
no_create=$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