Make it possible not to build Python bindings.

* configure.ac: Add a --disable-python option tied to
a USE_PYTHON conditional.
* README: Document the option.
* wrap/Makefile.am: Use the conditional.

ChangeLog

@@ -1,3 +1,12 @@
+2012-01-17  Alexandre Duret-Lutz  <adl@lrde.epita.fr>
+
+	Make it possible not to build Python bindings.
+
+	* configure.ac: Add a --disable-python option tied to
+	a USE_PYTHON conditional.
+	* README: Document the option.
+	* wrap/Makefile.am: Use the conditional.
+
 2012-01-17  Alexandre Duret-Lutz  <adl@lrde.epita.fr>
 
 	Fix position of the Send button with WebKit.

NEWS

@@ -1,5 +1,7 @@
 New in spot 0.8.1a:
 
+  * configure now has a --disable-python option to disable
+    the compilation of Python bindings.
   * Bug fixes:
     - spot::ltl::length() forgot to count the '&' and '|' operators
       in an LTL formula.

README

@@ -18,7 +18,9 @@ Requirements
 ------------
 
 Spot requires a complete installation of Python (version 2.0 or
-later).  Especially, Python's headers files should be installed.
+later).  Especially, Python's headers files should be installed.  If
+you don't have Python installed, you should run configure with
+the --disable-python option (see below).
 
 Spot also uses modified versions of BuDDy (a binary decision diagram),
 and LBTT (an LTL to Büchi test bench).  You do not need to install
@@ -57,6 +59,13 @@ flags specific to Spot:
     build, and installation of the included versions of these package,
     even when compatible versions are already installed.
 
+  --disable-python
+    Turn off the compilation of Python bindings.  These bindings are
+    currently used to run a couple of tests, and to build the CGI
+    script that translates LTL formulae on-line.  You may safely
+    disable these, especially if you do not have a working Python
+    installation or if you are attempting some cross-compilation.
+
   --enable-devel
     Enable debugging symbols, turn off aggressive optimizations, and
     turn on assertions.  This option is effective by default in
@@ -172,3 +181,6 @@ End:
  LocalWords:  gtec Tarjan tgbaparse tgbatest doc html PDF spotref pdf cgi ELTL
  LocalWords:  CGI ltl iface BDD Couvreur's evtgba emptchk kripke Kripke saba vm
  LocalWords:  eltlparse eltltest SABA sabaalgos sabatest ssp ltlcouter scc SCC
+LocalWords:  formulae optimizations kripkeparse kripketest Automata
+LocalWords:  neverparse ltlcounter ltlclasses parallelizing automata
+LocalWords:  wdba WDBA ajax dve DiVinE ltdl Libtool's dlopen

configure.ac

@@ -1,4 +1,4 @@
-# Copyright (C) 2008, 2009, 2010, 2011 Laboratoire de Recherche et
+# Copyright (C) 2008, 2009, 2010, 2011, 2012 Laboratoire de Recherche et
 # Développement de l'Epita (LRDE).
 # Copyright (C) 2003, 2004, 2005, 2006, 2007 Laboratoire d'Informatique de
 # Paris 6 (LIP6), département Systèmes Répartis Coopératifs (SRC), Université
@@ -35,7 +35,19 @@ test -z "$CFLAGS" && CFLAGS=
 test -z "$CXXFLAGS" && CXXFLAGS=
 
 adl_ENABLE_DEVEL
-adl_CHECK_PYTHON
+
+AC_ARG_ENABLE([python],
+              [AC_HELP_STRING([--disable-python],
+                              [do not compile Python bindings])],
+              [], [enable_python=yes])
+
+AM_CONDITIONAL([USE_PYTHON], [test "x${enable_python:-yes}" = xyes])
+
+if test "x${enable_python:-yes}" = xyes; then
+  AC_MSG_NOTICE([You may configure with --disable-python ]dnl
+[if you do not need Python bindings.])
+  adl_CHECK_PYTHON
+fi
 
 AC_PROG_CC
 AM_PROG_CC_C_O

wrap/Makefile.am

@@ -1,3 +1,5 @@
+## Copyright (C) 2012 Laboratoire de Recherche et Developpement de
+## l'Epita (LRDE).
 ## Copyright (C) 2003  Laboratoire d'Informatique de Paris 6 (LIP6),
 ## département Systèmes Répartis Coopératifs (SRC), Université Pierre
 ## et Marie Curie.
@@ -19,4 +21,6 @@
 ## Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 ## 02111-1307, USA.
 
+if USE_PYTHON
 SUBDIRS = python
+endif