#! /bin/sh

# 

# (C) 2006 by Argonne National Laboratory.

#     See COPYRIGHT in top-level directory.

#

# Update all of the derived files

# For best performance, execute this in the top-level directory.

# There are some experimental features to allow it to be executed in

# subdirectories

#

# Eventually, we want to allow this script to be executed anywhere in the

# mpich tree.  This is not yet implemented.

error_summary=""

acVersion=unknown

# finalStatus records whether there have been problems in updatefiles

# 1 = warning, 3 = fatal, 2 = reserved for future use, 

# 0 = no problems detected.

finalStatus=0

at_top=no

if [ -d maint -a -s maint/f77tof90.in ] ; then

    at_top=yes

fi

#

# Default choices

do_f77tof90=yes

do_build_configure=yes

do_makefiles=yes

# Allow MAKE to be set from the environment

MAKE=${MAKE-make}

# List of steps that we will consider

# (We do not include depend because the values for depend are not just yes/no)

AllSteps="f77tof90 build_configure makefiles"

stepsCleared=no

# Options for some steps

autoconfdir=""

# Extract the arguments intended for updatefiles.

temp_args=""

for arg in "$@" ; do

    case $arg in 

    -echo)

	set -x

	;;

    -do=*)

    opt=`echo A$arg | sed -e 's/A-do=//'`

    # Handle some synonyms

    case $opt in 

	build-configure|configure) opt=build_configure ;;

	makefile|Makefile|Makefiles) opt=makefiles;;

    esac

    var=do_$opt

    # Check that this opt is known

    eval oldval=\$"$var"

    if [ -z "$oldval" ] ; then

	echo "-do=$opt is unrecognized"

	exit 1

    else 

        if [ $stepsCleared = no ] ; then

	    for step in $AllSteps ; do

	        var=do_$step

	        eval $var=no

	    done

	    stepsCleared=yes

        fi

        var=do_$opt

        eval $var=yes

    fi

    ;;

    -with-autoconf=*|--with-autoconf=*)

    # Select a location for a different autoconf

    autoconfdir=`echo "A$arg" | sed -e 's/.*=//'`

    ;;

    -distrib)

    do_build_configure=no

    temp_args="$temp_args $arg"

    ;;

    -help|--help|-usage|--usage)

    cat <

    updatefiles [ --with-autoconf=dir ] [ -do=stepname ]

    Update the files in the MPICH build tree.  This file builds the 

    configure files, creates the Makefile.in files (using the autotools),

    and extracts the error messages.

    You can use --with-autoconf=dir to specify a directory that contains

    an alternate autoconf (and especially autoreconf).

    Use -do=stepname to update only a single step.  For example, 

    -do=build_configure only updates the configure scripts.  The available

    steps are

    $AllSteps

EOF

    exit

    ;;

    *)

    temp_args="$temp_args $arg"

    ;;

    esac

done

# Reset the arguments.  Note that this doesn't handle arguments that contain

# blanks.  I hope that we don't need those.

set -- $temp_args

#

#

if [ $at_top = "no" ] ; then

    echo "Must execute at top level directory for now"

    exit 1

fi

# Determine the autoconf to use.  If --with-autoconf was set, use 

# autoconf and autoheader from that directory

# This may also be needed for tools in the maint directory

if [ -n "$autoconfdir" ] ; then

    if [ -x $autoconfdir/autoreconf ] ; then

        autoreconf=$autoconfdir/autoreconf

        AUTORECONF=$autoreconf

        export AUTORECONF

    else

        echo "Could not find executable autoreconf in $autoconfdir"

	exit 1

    fi

else

    autoreconf=${AUTORECONF:-autoreconf}

fi

#

# Check that you have a working autoconf.  Autoconf 2.57 is not compatible with

# previous versions of autoconf (!!), even 2.52 (!!!).  

acVersion=ok

if [ -d .tmp ] ; then rm -rf .tmp ; fi

if [ -s .tmp ] ; then rm -f .tmp ; fi

if [ ! -d .tmp ] ; then

    mkdir .tmp 2>&1 >/dev/null

fi

# we require autoconf version 2.67 or greater

# acSubversion is the version number minus 2.  (we assume autoconf 2.xx)

# -1 is used for unknown

acSubversion=-1

acIncDirFlag=-I

for ver in 70 69 68 67 ; do

    rm -f .tmp/configure.ac .tmp/configure

    cat >.tmp/configure.ac <

AC_PREREQ(2.$ver)

EOF

    if (cd .tmp && $autoconf >/dev/null 2>&1 ) ; then

	acSubversion=$ver

	break

    fi

done

rm -f .tmp/configure.ac .tmp/configure

if [ "$acSubversion" -gt 0 ] ; then

    acVersion="2.$acSubversion"

    echo "You have autoconf version $acVersion."

else

    cat <

You either do not have autoconf in your path or updatefiles was unable to 

determine which version of autoconf you have.  You may be able to use

     autoconf --version

to see the version of autoconf (unfortunately, there is no standard 

format for the version output and it changes between autoconf versions.

In addition, some versions of autoconf choose among many versions and

provide incorrect output).

EOF

	error_summary="$error_summary \

No autoconf in path or unable to determine the version of autoconf."

        acVersion="Unknown"

fi

rm -rf .tmp

#

# Build scripts such as f77tof90 if necessary

run_configure=no

# Later versions of autoconf put the autoconf version into the autom4te*.cache

# name.

# Later versions of autoconf (2.57+?) will silently ignore the command to 

# rebuild the configure if it thinks that nothing has changed.  However,

# it does not accurately decide this (e.g., if aclocal.m4 includes files 

# that have changed, autoconf will ignore that and not regenerate the 

# configure file).  The information that autoconf uses is saved in the

# autom4te*.cache file; since this cache is not accurate, we delete it.

if [ ! -x maint/configure ] ; then

    (cd maint && $autoconf && rm -rf autom4te*.cache )

elif find maint -name 'configure.ac' -newer 'maint/configure' >/dev/null 2>&1 ; then

    # The above relies on the Unix find command

    (cd maint && $autoconf && rm -rf autom4te*.cache)

fi

if [ ! -x maint/f77tof90 ] ; then

    run_configure=yes

fi

#

# The following relies on the Unix find command

if [ -s maint/f77tof90 ] ; then

    if find maint -name 'f77tof90.in' -newer 'maint/f77tof90' >/dev/null 2>&1 ; then

        run_configure=yes

    fi

else

    run_configure=yes

fi

if [ "$run_configure" = "yes" ] ; then

    (cd maint && ./configure)

fi

# Create and/or update the f90 tests

if [ -x maint/f77tof90 -a $do_f77tof90 = "yes" ] ; then

    echo "Create or update the Fortran 90 tests derived from the Fortran 77 tests"

    for dir in f77/* ; do

        if [ ! -d $dir ] ; then continue ; fi

	leafDir=`basename $dir`

        if [ ! -d f90/$leafDir ] ; then

	    mkdir f90/$leafDir

        fi

        maint/f77tof90 $dir f90/$leafDir Makefile.sm Makefile.ap

    done

fi

#

# Create the Makefile.in files

# Make sure that these files exist so that the gcc dependency creation

# can work

rm_prepost=no

if [ ! -s src/include/mpidpre.h ] ; then

    rm_prepost=yes

fi

# Create the configure files and run autoheader

# Eventually, make this a test for find available.  Perhaps

# find . -name configure.ac > /dev/null 2>&1

# The problem is that even though cygwin has find, the DOS find

# is identified first.  We probably need a test for this case

fixBackWhackCtrlMBug=no

if [ $do_build_configure = yes ] ; then

    # If we don't delete the autom4te.cache files, bugs in 

    # autoconf may fail to correctly update configure

    # Gah. Some xargs don't accept -r, other break if there is no

    # input.  To avoid that, we do this in two steps: first the

    # find, then the rm (if there are any files)

    $autoreconf -vif $acIncDirFlag confdb

    if [ ! -x configure ] ; then 

        # Check for a few allowed exceptions

        echo "Could not build configure from configure.ac in $dir"

	echo "Aborting updatefiles!"

	exit 1

    fi

fi

#

# The following must be the last statements executed

if [ -n "$error_summary" ] ; then

    echo " "

    echo "Problems encountered while running updatefiles."

    echo "These may cause problems when configuring or building MPICH."

    echo "$error_summary"

fi

case $finalStatus in 

   0) # all is well

	;;

   1) # warnings

 	;;

   2) # reserved for future use

	;;

   3) # fatal, cannot continue

	echo "updatefiles step failed!  Review the output and fix the problem"

        echo "before continuing"

        exit 1

	;;	

   *) # unknown

	echo "Internal error in updatefiles; finalStatus=$finalStatus"

	exit 1

	;;

esac