#!/bin/sh

#

# Generate dependencies from a list of source files

# Check to make sure our environment variables are set

if test x"$INCLUDE" = x -o x"$SOURCES" = x -o x"$output" = x; then

    echo "SOURCES, INCLUDE, and output needs to be set"

    exit 1

fi

cache_prefix=".#$$"

generate_var()

{

    echo $1 | sed -e 's|^.*/||' -e 's|\.|_|g'

}

search_deps()

{

    base=`echo $1 | sed 's|/[^/]*$||'`

    grep '#include "' <$1 | sed -e 's|.*"\([^"]*\)".*|\1|' | \

    while read file

    do cache=${cache_prefix}_`generate_var $file`

       if test -f $cache; then

          : # We already ahve this cached

       else

           : >$cache

           for path in $base `echo $INCLUDE | sed 's|-I||g'`

           do dep="$path/$file"

              if test -f "$dep"; then

                 echo "	$dep \\" >>$cache

                 search_deps $dep >>$cache

                 break

              fi

           done

       fi

       cat $cache

    done

}

:>${output}.new

for src in $SOURCES

do  echo "Generating dependencies for $src"

    ext=`echo $src | sed 's|.*\.\(.*\)|\1|'`

    echo "\$(objects)/$obj: $src \\" >>${output}.new

    search_deps $src | sort | uniq >>${output}.new

    case $ext in

        c) cat >>${output}.new <<__EOF__

	\$(LIBTOOL) --mode=compile \$(CC) \$(CFLAGS) \$(EXTRA_CFLAGS) -c $src  -o \$@

__EOF__

        ;;

        cc) cat >>${output}.new <<__EOF__

	\$(LIBTOOL) --mode=compile \$(CC) \$(CFLAGS) \$(EXTRA_CFLAGS) -c $src  -o \$@

__EOF__

        ;;

        m) cat >>${output}.new <<__EOF__

	\$(LIBTOOL) --mode=compile \$(CC) \$(CFLAGS) \$(EXTRA_CFLAGS) -c $src  -o \$@

__EOF__

        ;;

        asm) cat >>${output}.new <<__EOF__

	\$(LIBTOOL) --tag=CC --mode=compile \$(auxdir)/strip_fPIC.sh \$(NASM) $src -o \$@

__EOF__

        ;;

        S) cat >>${output}.new <<__EOF__

	\$(LIBTOOL)  --mode=compile \$(CC) \$(CFLAGS) \$(EXTRA_CFLAGS) -c $src  -o \$@

__EOF__

        ;;

        *)   echo "Unknown file extension: $ext";;

    esac

    echo "" >>${output}.new

done

mv ${output}.new ${output}

rm -f ${cache_prefix}*