dnl dolt, a replacement for libtool

dnl Copyright © 2007-2008 Josh Triplett <josh@freedesktop.org>

dnl Copying and distribution of this file, with or without modification,

dnl are permitted in any medium without royalty provided the copyright

dnl notice and this notice are preserved.

dnl

dnl To use dolt, invoke the DOLT macro immediately after the libtool macros.

dnl Optionally, copy this file into acinclude.m4, to avoid the need to have it

dnl installed when running autoconf on your project.

AC_DEFUN([DOLT], [

AC_REQUIRE([AC_CANONICAL_HOST])

# dolt, a replacement for libtool

# Josh Triplett <josh@freedesktop.org>

AC_PATH_PROG(DOLT_BASH, bash)

AC_MSG_CHECKING([if dolt supports this host])

dolt_supported=yes

if test x$DOLT_BASH = x -o x$SBOX_UNAME_MACHINE != x; then

    dolt_supported=no

fi

if test x$GCC != xyes; then

    dolt_supported=no

fi

case $host in

i?86-*-linux*|x86_64-*-linux*|powerpc-*-linux* \

|amd64-*-freebsd*|i?86-*-freebsd*|ia64-*-freebsd*)

    pic_options='-fPIC'

    ;;

i?86-apple-darwin*)

    pic_options='-fno-common'

    ;;

*)

    dolt_supported=no

    ;;

esac

if test x$dolt_supported = xno ; then

    AC_MSG_RESULT([no, falling back to libtool])

    LTCOMPILE='$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(COMPILE)'

    LTCXXCOMPILE='$(LIBTOOL) --tag=CXX $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CXXCOMPILE)'

else

    AC_MSG_RESULT([yes, replacing libtool])

dnl Start writing out doltcompile.

    cat <<__DOLTCOMPILE__EOF__ >doltcompile

#!$DOLT_BASH

__DOLTCOMPILE__EOF__

    cat <<'__DOLTCOMPILE__EOF__' >>doltcompile

args=("$[]@")

for ((arg=0; arg<${#args@<:@@@:>@}; arg++)) ; do

    if test x"${args@<:@$arg@:>@}" = x-o ; then

        objarg=$((arg+1))

        break

    fi

done

if test x$objarg = x ; then

    echo 'Error: no -o on compiler command line' 1>&2

    exit 1

fi

lo="${args@<:@$objarg@:>@}"

obj="${lo%.lo}"

if test x"$lo" = x"$obj" ; then

    echo "Error: libtool object file name \"$lo\" does not end in .lo" 1>&2

    exit 1

fi

objbase="${obj##*/}"

__DOLTCOMPILE__EOF__

dnl Write out shared compilation code.

    if test x$enable_shared = xyes; then

        cat <<'__DOLTCOMPILE__EOF__' >>doltcompile

libobjdir="${obj%$objbase}.libs"

if test ! -d "$libobjdir" ; then

    mkdir_out="$(mkdir "$libobjdir" 2>&1)"

    mkdir_ret=$?

    if test "$mkdir_ret" -ne 0 && test ! -d "$libobjdir" ; then

	echo "$mkdir_out" 1>&2

        exit $mkdir_ret

    fi

fi

pic_object="$libobjdir/$objbase.o"

args@<:@$objarg@:>@="$pic_object"

__DOLTCOMPILE__EOF__

    cat <<__DOLTCOMPILE__EOF__ >>doltcompile

"\${args@<:@@@:>@}" $pic_options -DPIC || exit \$?

__DOLTCOMPILE__EOF__

    fi

dnl Write out static compilation code.

dnl Avoid duplicate compiler output if also building shared objects.

    if test x$enable_static = xyes; then

        cat <<'__DOLTCOMPILE__EOF__' >>doltcompile

non_pic_object="$obj.o"

args@<:@$objarg@:>@="$non_pic_object"

__DOLTCOMPILE__EOF__

        if test x$enable_shared = xyes; then

            cat <<'__DOLTCOMPILE__EOF__' >>doltcompile

"${args@<:@@@:>@}" >/dev/null 2>&1 || exit $?

__DOLTCOMPILE__EOF__

        else

            cat <<'__DOLTCOMPILE__EOF__' >>doltcompile

"${args@<:@@@:>@}" || exit $?

__DOLTCOMPILE__EOF__

        fi

    fi

dnl Write out the code to write the .lo file.

dnl The second line of the .lo file must match "^# Generated by .*libtool"

    cat <<'__DOLTCOMPILE__EOF__' >>doltcompile

{

echo "# $lo - a libtool object file"

echo "# Generated by doltcompile, not libtool"

__DOLTCOMPILE__EOF__

    if test x$enable_shared = xyes; then

        cat <<'__DOLTCOMPILE__EOF__' >>doltcompile

echo "pic_object='.libs/${objbase}.o'"

__DOLTCOMPILE__EOF__

    else

        cat <<'__DOLTCOMPILE__EOF__' >>doltcompile

echo pic_object=none

__DOLTCOMPILE__EOF__

    fi

    if test x$enable_static = xyes; then

        cat <<'__DOLTCOMPILE__EOF__' >>doltcompile

echo "non_pic_object='${objbase}.o'"

__DOLTCOMPILE__EOF__

    else

        cat <<'__DOLTCOMPILE__EOF__' >>doltcompile

echo non_pic_object=none

__DOLTCOMPILE__EOF__

    fi

    cat <<'__DOLTCOMPILE__EOF__' >>doltcompile

} > "$lo"

__DOLTCOMPILE__EOF__

dnl Done writing out doltcompile; substitute it for libtool compilation.

    chmod +x doltcompile

    LTCOMPILE='$(top_builddir)/doltcompile $(COMPILE)'

    LTCXXCOMPILE='$(top_builddir)/doltcompile $(CXXCOMPILE)'

dnl automake ignores LTCOMPILE and LTCXXCOMPILE when it has separate CFLAGS for

dnl a target, so write out a libtool wrapper to handle that case.

dnl Note that doltlibtool does not handle inferred tags or option arguments

dnl without '=', because automake does not use them.

    cat <<__DOLTLIBTOOL__EOF__ > doltlibtool

#!$DOLT_BASH

__DOLTLIBTOOL__EOF__

    cat <<'__DOLTLIBTOOL__EOF__' >>doltlibtool

top_builddir_slash="${0%%doltlibtool}"

: ${top_builddir_slash:=./}

args=()

modeok=false

tagok=false

for arg in "$[]@"; do

    case "$arg" in

        --mode=compile) modeok=true ;;

        --tag=CC|--tag=CXX) tagok=true ;;

        *) args+=("$arg")

    esac

done

if $modeok && $tagok ; then

    . ${top_builddir_slash}doltcompile "${args@<:@@@:>@}"

else

    exec ${top_builddir_slash}libtool "$[]@"

fi

__DOLTLIBTOOL__EOF__

dnl Done writing out doltlibtool; substitute it for libtool.

    chmod +x doltlibtool

    LIBTOOL='$(top_builddir)/doltlibtool'

fi

AC_SUBST(LTCOMPILE)

AC_SUBST(LTCXXCOMPILE)

# end dolt

])

DOLT