Add tclstub support (flightaware#23)

* Add tclstub support

Initialize the stubs when needed.

* Bump version

* Add tclstub support

To build with tclstub library run.
You have to autogen.sh to create a fresh configure.

NOCONFIGURE=1 ./autogen.sh
./configure --enable-tclstub

And add any other flags you need.

We ship the configure script to help distro's that do not
run a full autogen.sh. But stubs is only available if you
run autogen.sh (or the automake process).

Makefile.am

@@ -17,9 +17,16 @@ include_HEADERS = tclreadline.h
 
 INCLUDES = -I$(TCL_INCLUDE_DIR) -I$(READLINE_INCLUDE_DIR)
 
-## libtclreadline_la_LIBADD = $(LIBS)
-libtclreadline_la_CFLAGS = -Wall
-libtclreadline_la_LIBADD = $(TCL_LIB_SPEC)
+if !USE_TCL_STUBS
+    libtclreadline_la_CFLAGS = -Wall
+else
+    libtclreadline_la_CFLAGS = -Wall -DUSE_TCL_STUBS
+endif
+if !USE_TCL_STUBS
+    libtclreadline_la_LIBADD = $(TCL_LIB_SPEC)
+else
+    libtclreadline_la_LIBADD = $(TCL_STUB_LIB_SPEC)
+endif
 libtclreadline_la_LDFLAGS = -release $(MAJOR).$(MINOR).$(PATCHLEVEL)
 
 tclrldir = @TCLRL_DIR@

configure

@@ -1,7 +1,7 @@
 #! /bin/sh
 # From configure.ac Revision.
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for tclreadline 2.3.6.
+# Generated by GNU Autoconf 2.69 for tclreadline 2.3.7.
 #
 #
 # Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
@@ -588,8 +588,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='tclreadline'
 PACKAGE_TARNAME='tclreadline'
-PACKAGE_VERSION='2.3.6'
-PACKAGE_STRING='tclreadline 2.3.6'
+PACKAGE_VERSION='2.3.7'
+PACKAGE_STRING='tclreadline 2.3.7'
 PACKAGE_BUGREPORT=''
 PACKAGE_URL=''
 
@@ -1344,7 +1344,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures tclreadline 2.3.6 to adapt to many kinds of systems.
+\`configure' configures tclreadline 2.3.7 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1415,7 +1415,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of tclreadline 2.3.6:";;
+     short | recursive ) echo "Configuration of tclreadline 2.3.7:";;
    esac
   cat <<\_ACEOF
 
@@ -1533,7 +1533,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-tclreadline configure 2.3.6
+tclreadline configure 2.3.7
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -1944,7 +1944,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by tclreadline $as_me 2.3.6, which was
+It was created by tclreadline $as_me 2.3.7, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -2327,9 +2327,9 @@ ac_configure="$SHELL $ac_aux_dir/configure"  # Please don't use this var.
 
 
 
-MAJOR="`echo '2.3.6' | cut -d. -f 1`"
-MINOR="`echo '2.3.6' | cut -d. -f 2`"
-PATCHLEVEL="`echo '2.3.6' | cut -d. -f 3`"
+MAJOR="`echo '2.3.7' | cut -d. -f 1`"
+MINOR="`echo '2.3.7' | cut -d. -f 2`"
+PATCHLEVEL="`echo '2.3.7' | cut -d. -f 3`"
 VERSION=$MAJOR.$MINOR
 PATCHLEVEL_STR=$VERSION.$PATCHLEVEL
 
@@ -2825,7 +2825,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='tclreadline'
- VERSION='2.3.6'
+ VERSION='2.3.7'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -13347,7 +13347,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by tclreadline $as_me 2.3.6, which was
+This file was extended by tclreadline $as_me 2.3.7, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -13413,7 +13413,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-tclreadline config.status 2.3.6
+tclreadline config.status 2.3.7
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 

configure.ac

@@ -8,7 +8,7 @@ dnl Copyright (c) 1998 - 2014, Johannes Zellner <johannes@zellner.org>
 dnl This software is copyright under the BSD license.
 dnl ---
 
-AC_INIT([tclreadline], [2.3.6])
+AC_INIT([tclreadline], [2.3.7])
 AC_CONFIG_SRCDIR([tclreadline.c])
 AC_CONFIG_HEADERS(config.h)
 AC_PREREQ(2.13)
@@ -258,6 +258,20 @@ int main () {
     AC_MSG_RESULT(no cross compiling)
 )
 
+AC_ARG_ENABLE(tclstub,
+    [  --enable-tclstub        build with TCL stub library],
+    [dnl action if given
+    case "${enableval}" in
+        yes) enable_tclstub=true ;; 
+        no)  enable_tclstub=false ;;
+        *)   AC_MSG_ERROR(bad value ${enableval} for --enable-tclstub) ;;
+    esac
+    ],
+    [dnl action if not given
+    enable_tclstub=false
+    ]
+)
+AM_CONDITIONAL(USE_TCL_STUBS, test x$enable_tclstub = xtrue)
 
 AC_ARG_ENABLE(tclshrl,
     [  --enable-tclshrl        build statically linked tclshrl],
@@ -294,8 +308,8 @@ AC_ARG_ENABLE(wishrl,
 )
 AM_CONDITIONAL(STATIC_WISHRL, test x$enable_static = xtrue)
 
-
 AC_SUBST(TCL_INCLUDE_DIR)
+AC_SUBST(TCL_STUB_LIB_SPEC)
 AC_SUBST(TCL_LIB_SPEC)
 AC_SUBST(READLINE_INCLUDE_DIR)
 AC_OUTPUT(Makefile tclreadline.h tclreadlineInit.tcl tclreadlineSetup.tcl tclreadline.n pkgIndex.tcl)

tclreadline.c

@@ -563,6 +563,9 @@ int
 Tclreadline_Init(Tcl_Interp *interp)
 {
     int status;
+ #ifdef USE_TCL_STUBS
+     Tcl_InitStubs(interp, "8.6", 0);
+#endif
     Tcl_CreateObjCommand(interp, "::tclreadline::readline", TclReadlineCmd,
         (ClientData) NULL, (Tcl_CmdDeleteProc *) NULL);
     tclrl_interp = interp;