Use the supported invocation of AC_INIT.

The 1-argument version of AC_INIT is obsolete since 2003. Moreover, it
prevents ./configure --version from giving a meaningful output.

Makefile.in

@@ -9,8 +9,6 @@
 #                                                                  #
 ####################################################################
 
-include Version
-
 VERBOSEMAKE ?= @enable_verbose_make@
 
 ifeq ($(VERBOSEMAKE),yes)
@@ -1870,7 +1868,7 @@ wc:
 # distrib
 #########
 
-NAME = why3-$(VERSION)
+NAME = why3-@VERSION@
 DISTRIB_DIR = distrib/$(NAME)
 DISTRIB_TAR = $(DISTRIB_DIR).tar.gz
 
@@ -2048,7 +2046,7 @@ clean::
 doc/version.tex: doc/version.tex.in config.status
 	./config.status chmod --file $@
 
-config.status: configure Version
+config.status: configure
 	./config.status --recheck
 
 opt byte: lib/why3/META
@@ -2056,7 +2054,7 @@ opt byte: lib/why3/META
 lib/why3/META: lib/why3/META.in config.status
 	./config.status chmod --file $@
 
-configure: configure.in
+configure: configure.in Version
 	autoconf
 
 ###################

Version

 # Why version
 VERSION=0.83+git
-
-
-
-
-
-

configure.in

@@ -39,11 +39,7 @@
 #   OCAMLVERSION  the ocaml version number
 #   OCAMLWEB      "ocamlweb" (not mandatory)
 
-
-# check for one particular file of the sources
-# ADAPT THE FOLLOWING LINE TO YOUR SOURCES!
-
-AC_INIT(src/)
+AC_INIT([Why3], m4_esyscmd([. ./Version; echo -n "$VERSION"]))
 
 # verbosemake
 
@@ -671,7 +667,7 @@ fi
 dnl AC_CHECK_PROGS(PSVIEWER,gv evince)
 dnl AC_CHECK_PROGS(PDFVIEWER,xpdf acroread evince)
 
-. ./Version
+VERSION=$PACKAGE_VERSION
 
 BUILDDATE="$(date)"