Fixed the --enable-revision argument for configure

configure

@@ -749,6 +749,7 @@ with_aix_soname
 with_gnu_ld
 with_sysroot
 enable_libtool_lock
+enable_revision
 with_boost
 with_boost_libdir
 with_boost_iostreams
@@ -768,7 +769,6 @@ CC
 CFLAGS
 LT_SYS_LIBRARY_PATH
 DEBUG
-UPDATE_REVISION
 CCP4
 LIBZ_CPPFLAGS
 LIBZ_LDFLAGS
@@ -1403,6 +1403,7 @@ Optional Features:
   --enable-fast-install[=PKGS]
                           optimize for fast installation [default=yes]
   --disable-libtool-lock  avoid locking (might break parallel builds)
+  --enable-revision       Create a build number as revision
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -1449,8 +1450,6 @@ Some influential environment variables:
   LT_SYS_LIBRARY_PATH
               User-defined run-time library search path.
   DEBUG       Build a debug version of the library
-  UPDATE_REVISION
-              Update the revision.hpp file
   CCP4        The location where CCP4 is installed
   LIBZ_CPPFLAGS
               C preprocessor flags for LIBZ headers
@@ -16091,6 +16090,19 @@ LIBCIF_SEMANTIC_VERSION=1.0.0
 
 
 
+# Check whether --enable-revision was given.
+if test "${enable_revision+set}" = set; then :
+  enableval=$enable_revision;
+fi
+
+
+if test "x$enable_revision" != "xyes" ; then :
+
+	UPDATE_REVISION=1
+
+fi
+
+UPDATE_REVISION=$UPDATE_REVISION
 
 
 

configure.ac

@@ -77,7 +77,7 @@ AC_ARG_VAR([DEBUG], [Build a debug version of the library])
 dnl revision numbering is something used internally at the NKI
 AC_ARG_ENABLE(
 	revision,
-	[AS_HELP_STRING([--disable-revision], [Create a build number as revision])])
+	[AS_HELP_STRING([--enable-revision], [Create a build number as revision])])
 
 AS_IF([test "x$enable_revision" != "xyes" ], [
 	UPDATE_REVISION=1