README-hacking: re-configure from scratch during bootstrap.

When building autoconf from a git checkout, recommend running
‘make distclean’ and a second ‘./configure’ after regenerating
autoconf’s own configure script using the just-built autoconf.
If one only runs ‘make check’ at that point, some configure-time
tests will not be repeated using the new code, such as detection
of a “better” shell.

diff --git a/README-hacking b/README-hacking
index abf841b90d22bb2f958bdca61a9a7a28de070182..ab1cf679a954ba956f526aecdfe75d9ea3a01259 100644 (file)
--- a/README-hacking
+++ b/README-hacking
@@ -81,6 +81,8 @@ generated files are regenerated using the tools just built by "make"
   $ ./configure
   $ make
   $ ( PATH=`pwd`/tests:$PATH; autoreconf -vi )
+  $ make distclean
+  $ ./configure
   $ make check
 
 At this point, there should be no difference between your local copy,