libgloss: move to ../config/multi.m4 for multilib logic

The current libgloss multilib logic is almost exactly the same as the
config/multi.m4, and the differences should be minor, so switch over
to that to delete custom logic on ourside.

The insertions here look larger and that's because none of the scripts
were declaring --enable-multilib explicitly even though they checked the
flag and changed behavior.

3 files changed, 67 insertions, 24 deletions

diff --git a/libgloss/mn10300/aclocal.m4 b/libgloss/mn10300/aclocal.m4
index 24271f381..fab8217a4 100644
--- a/libgloss/mn10300/aclocal.m4
+++ b/libgloss/mn10300/aclocal.m4
@@ -379,5 +379,6 @@ AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])
 
 m4_include([../../config/depstand.m4])
 m4_include([../../config/lead-dot.m4])
+m4_include([../../config/multi.m4])
 m4_include([../../config/override.m4])
 m4_include([../acinclude.m4])
diff --git a/libgloss/mn10300/configure b/libgloss/mn10300/configure
index 971885587..4ddb539fa 100755
--- a/libgloss/mn10300/configure
+++ b/libgloss/mn10300/configure
@@ -584,6 +584,7 @@ PACKAGE_URL=
 ac_unique_file="crt0.S"
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
+multi_basedir
 bsp_list
 script_list
 part_specific_obj
@@ -665,6 +666,7 @@ target_makefile_frag'
 ac_user_opts='
 enable_option_checking
 enable_dependency_tracking
+enable_multilib
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1292,6 +1294,7 @@ Optional Features:
                           do not reject slow dependency extractors
   --disable-dependency-tracking
                           speeds up one-time build
+  --enable-multilib       build many library versions (default)
 
 Some influential environment variables:
   CCAS        assembler compiler command (defaults to CC)
@@ -2565,6 +2568,44 @@ target_makefile_frag_path=$target_makefile_frag
 
 
 
+# Default to --enable-multilib
+# Check whether --enable-multilib was given.
+if test "${enable_multilib+set}" = set; then :
+  enableval=$enable_multilib; case "$enableval" in
+  yes) multilib=yes ;;
+  no)  multilib=no ;;
+  *)   as_fn_error $? "bad value $enableval for multilib option" "$LINENO" 5 ;;
+ esac
+else
+  multilib=yes
+fi
+
+
+# We may get other options which we leave undocumented:
+# --with-target-subdir, --with-multisrctop, --with-multisubdir
+# See config-ml.in if you want the gory details.
+
+if test "$srcdir" = "."; then
+  if test "$with_target_subdir" != "."; then
+    multi_basedir="$srcdir/$with_multisrctop../../.."
+  else
+    multi_basedir="$srcdir/$with_multisrctop../.."
+  fi
+else
+  multi_basedir="$srcdir/../.."
+fi
+
+
+# Even if the default multilib is not a cross compilation,
+# it may be that some of the other multilibs are.
+if test $cross_compiling = no && test $multilib = yes \
+   && test "x${with_multisubdir}" != x ; then
+   cross_compiling=maybe
+fi
+
+ac_config_commands="$ac_config_commands default-1"
+
+
 ac_config_files="$ac_config_files Makefile"
 
 cat >confcache <<\_ACEOF
@@ -3281,12 +3322,20 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 # INIT-COMMANDS
 #
 AMDEP_TRUE="$AMDEP_TRUE" ac_aux_dir="$ac_aux_dir"
-srcdir=${srcdir}
-target=${target}
-with_multisubdir=${with_multisubdir}
-ac_configure_args="${ac_configure_args} --enable-multilib"
-CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
 
+srcdir="$srcdir"
+host="$host"
+target="$target"
+with_multisubdir="$with_multisubdir"
+with_multisrctop="$with_multisrctop"
+with_target_subdir="$with_target_subdir"
+ac_configure_args="${multilib_arg} ${ac_configure_args}"
+multi_basedir="$multi_basedir"
+CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
+CC="$CC"
+CXX="$CXX"
+GFORTRAN="$GFORTRAN"
+GCJ="$GCJ"
 
 _ACEOF
 
@@ -3297,6 +3346,7 @@ for ac_config_target in $ac_config_targets
 do
   case $ac_config_target in
     "depfiles") CONFIG_COMMANDS="$CONFIG_COMMANDS depfiles" ;;
+    "default-1") CONFIG_COMMANDS="$CONFIG_COMMANDS default-1" ;;
     "Makefile") CONFIG_FILES="$CONFIG_FILES Makefile" ;;
 
   *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5;;
@@ -3853,10 +3903,14 @@ $as_echo X"$file" |
   done
 }
  ;;
-    "Makefile":F) if test -n "$CONFIG_FILES"; then
-  unset ac_file
-  . ${srcdir}/../../config-ml.in
-fi ;;
+    "default-1":C)
+# Only add multilib support code if we just rebuilt the top-level
+# Makefile.
+case " $CONFIG_FILES " in
+ *" Makefile "*)
+   ac_file=Makefile . ${multi_basedir}/config-ml.in
+   ;;
+esac ;;
 
   esac
 done # for ac_tag
@@ -3895,5 +3949,3 @@ if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then
 $as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
 fi
 
-
-
diff --git a/libgloss/mn10300/configure.ac b/libgloss/mn10300/configure.ac
index 9526576b0..88af0f948 100644
--- a/libgloss/mn10300/configure.ac
+++ b/libgloss/mn10300/configure.ac
@@ -61,17 +61,7 @@ AC_SUBST(part_specific_obj)
 AC_SUBST(script_list)
 AC_SUBST(bsp_list)
 
-AC_CONFIG_FILES([Makefile],
-[if test -n "$CONFIG_FILES"; then
-  unset ac_file
-  . ${srcdir}/../../config-ml.in
-fi],
-srcdir=${srcdir}
-target=${target}
-with_multisubdir=${with_multisubdir}
-ac_configure_args="${ac_configure_args} --enable-multilib"
-CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
-)
-AC_OUTPUT
-
+AM_ENABLE_MULTILIB(, ../..)
 
+AC_CONFIG_FILES([Makefile])
+AC_OUTPUT