configure.ac: Do the dolt

Use dolt instead of libtool whereever practical.  See:
http://lists.debian.org/debian-devel/2008/04/msg00286.html

1 files changed, 141 insertions, 0 deletions

diff --git a/acinclude.m4 b/acinclude.m4
index f3d8734f3..822adbe0d 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -1,3 +1,144 @@
+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.
+dnl
+dnl git snapshot: 198a3026b347b9220a2f2e2ae23a3049c35af262
+
+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 libtool sucks])
+AC_MSG_RESULT([yup, it does])
+AC_MSG_CHECKING([if dolt supports this host])
+dolt_supported=yes
+if test x$DOLT_BASH = x; then
+    dolt_supported=no
+fi
+if test x$GCC != xyes; then
+    dolt_supported=no
+fi
+case $host in
+i?86-*-linux*|x86_64-*-linux*) ;;
+*) dolt_supported=no ;;
+esac
+if test x$dolt_supported = xno ; then
+    AC_MSG_RESULT([no, falling back to libtool])
+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 "$libobjdir"
+    mkdir_ret=$?
+    if test "$mkdir_ret" -ne 0 && test ! -d "$libobjdir" ; then
+        exit $mkdir_ret
+    fi
+fi
+pic_object="$libobjdir/$objbase.o"
+args@<:@$objarg@:>@="$pic_object"
+"${args@<:@@@:>@}" -fPIC -DPIC
+__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
+__DOLTCOMPILE__EOF__
+        else
+            cat <<'__DOLTCOMPILE__EOF__' >>doltcompile
+"${args@<:@@@:>@}"
+__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='$pic_object'"
+__DOLTCOMPILE__EOF__
+    else
+        cat <<'__DOLTCOMPILE__EOF__' >>doltcompile
+echo pic_object=none
+__DOLTCOMPILE__EOF__
+    fi
+
+    if test x$enable_static = xyes; then
+        cat <<'__DOLTCOMPILE__EOF__' >>doltcompile
+echo "non_pic_object='$non_pic_object'"
+__DOLTCOMPILE__EOF__
+    else
+        cat <<'__DOLTCOMPILE__EOF__' >>doltcompile
+echo non_pic_object=none
+__DOLTCOMPILE__EOF__
+    fi
+
+    cat <<'__DOLTCOMPILE__EOF__' >>doltcompile
+} > "$lo"
+__DOLTCOMPILE__EOF__
+
+dnl Done writing out doltcompile; substitute it for libtool compilation.
+    chmod +x doltcompile
+    LTCOMPILE='$(top_builddir)/doltcompile $(COMPILE)'
+    AC_SUBST(LTCOMPILE)
+    LTCXXCOMPILE='$(top_builddir)/doltcompile $(CXXCOMPILE)'
+    AC_SUBST(LTCXXCOMPILE)
+fi
+# end dolt
+])
+
+
+
+
 ##### http://autoconf-archive.cryp.to/ac_define_dir.html
 #
 # SYNOPSIS