Add the subversion revision number to the version info.

configure.ac

@@ -67,7 +67,6 @@ AC_CONFIG_FILES([
    libdivecomputer.pc
    Makefile
    src/Makefile
-   src/version.h
    src/libdivecomputer.rc
    examples/Makefile
 ])

src/Makefile.am

@@ -113,5 +113,25 @@ libdivecomputer.exp: libdivecomputer.symbols
 .rc.lo:
 	$(AM_V_GEN) $(LIBTOOL) --silent --tag=RC --mode=compile $(RC) $< -o $@
 
-CLEANFILES = libdivecomputer.exp 
-EXTRA_DIST = libdivecomputer.symbols
+FORCE:
+$(top_srcdir)/revision: FORCE
+	@if (test -d $(top_srcdir)/.svn && cd $(top_srcdir) \
+	     && svnversion | sed -e 's/[MSP]//g') > revision-t 2>/dev/null \
+	  && ! cmp -s revision-t $@; then \
+	  mv -f revision-t $@; \
+	else \
+	  rm -f revision-t; \
+	  if ! test -f $@; then touch $@; fi; \
+	fi
+
+version.h: $(top_srcdir)/revision version.h.in Makefile.am
+	$(AM_V_GEN) sed \
+		-e 's/\@DC_VERSION_MAJOR\@/@DC_VERSION_MAJOR@/' \
+		-e 's/\@DC_VERSION_MINOR\@/@DC_VERSION_MINOR@/' \
+		-e 's/\@DC_VERSION_MICRO\@/@DC_VERSION_MICRO@/' \
+		-e 's/\@DC_VERSION_EXTRA\@/'`cat $(top_srcdir)/revision`'/' \
+		$(srcdir)/version.h.in > $@
+
+BUILT_SOURCES = version.h
+EXTRA_DIST = libdivecomputer.symbols $(top_srcdir)/revision version.h.in
+CLEANFILES = libdivecomputer.exp revision-t

src/version.h.in

@@ -29,6 +29,7 @@ extern "C" {
 #define DC_VERSION_MAJOR @DC_VERSION_MAJOR@
 #define DC_VERSION_MINOR @DC_VERSION_MINOR@
 #define DC_VERSION_MICRO @DC_VERSION_MICRO@
+#define DC_VERSION_EXTRA "@DC_VERSION_EXTRA@"
 
 #ifdef __cplusplus
 }