Merge branch 'fix-compilation-gcc9' into 'master'

Fix compilation + doc switch.
 
# Scribo compiles with GCC 9

Scribo in now compiling with GCC 9 with no error.

# Doc configure switch

Documentation build can be disabled with the switch:

```
./configure --enable-doc=no
```

See merge request olena/olena!3

Makefile.am

@@ -30,7 +30,9 @@ endif ENABLE_SCRIBO
 # We rely on Automake to ensure that the documentions are generated in
 # the right order.  Here, we make sure that the general documentation
 # will be generated after Milena's and Scribo's documentation.
-SUBDIRS += doc
+if ENABLE_DOC
+  SUBDIRS += doc
+endif ENABLE_DOC
 
 # Target shortcuts delegating the actual action to milena/Makefile.
 LOCAL_RECURSIVE_TARGETS = tests

configure.ac

@@ -170,8 +170,15 @@ fi
 ## Documentation.  ##
 ## --------------- ##
 
+# Switch to enable doc
+AC_ARG_ENABLE([doc],
+              [AS_HELP_STRING([--enable-doc],
+                              [build documentation])])
+AM_CONDITIONAL([ENABLE_DOC], [test "x$enable_doc" = xyes])
+
 # Tools used to build the documentation.
 
+
 # rst2html can have many names, especially in the MacPorts, where
 # py-docutils binaries include their version numbers in their names.
 AC_ARG_VAR([RST2HTML], [reStructuredText-to-HTML translator])
@@ -215,6 +222,7 @@ AC_ARG_ENABLE([all],
      enable_scribo=yes
      enable_apps=yes
      enable_tools=yes
+     enable_doc=yes
    fi])
 
 
@@ -733,6 +741,7 @@ Swilena                 --enable-swilena        $enable_swilena
 -------------------------------------------------------------------------------
 Apps                    --enable-apps           $enable_apps
 Tools                   --enable-tools          $enable_tools
+Doc                     --enable-doc            $enable_doc
 -------------------------------------------------------------------------------
 
 

milena/Makefile.am

@@ -15,7 +15,12 @@
 # You should have received a copy of the GNU General Public License
 # along with Olena.  If not, see <http://www.gnu.org/licenses/>.
 
-SUBDIRS = . doc mesh tests
+
+SUBDIRS = . $(DOCDIR) mesh tests
+
+if ENABLE_DOC
+  SUBDIRS += doc
+endif ENABLE_DOC
 
 if ENABLE_APPS
   SUBDIRS += apps

scribo/Makefile.am

@@ -15,7 +15,12 @@
 # You should have received a copy of the GNU General Public License
 # along with Olena.  If not, see <http://www.gnu.org/licenses/>.
 
-SUBDIRS = demo doc tests src
+SUBDIRS = demo $(DOCDIR) tests src
+
+if ENABLE_DOC
+  SUBDIRS += doc
+endif ENABLE_DOC
+
 
 .PHONY: bin
 bin:

scribo/scribo/debug/logger.hh

@@ -170,13 +170,8 @@ namespace scribo
 				const Image<I>& ima, const char *name);
 
 	template <unsigned n, typename I>
-	void
-	log_image_dispatch(const value::label<n>&,
-			   const Image<I>& ima, const char *name);
-
-	template <typename I>
-	void log_image_dispatch(const mln_value(I)&,
-				const Image<I>& ima, const char *name);
+	void log_image_dispatch(const value::label<n>&,
+                                const Image<I>& ima, const char *name);
 
 	template <typename I>
 	void log_image_dispatch(const value::rgb8&,