On VCS-independent ways of identifying commits, and why they are desirable.

[bpt/emacs.git] / Makefile.in

diff --git a/Makefile.in b/Makefile.in
index c2871d6..852a134 100644 (file)
--- a/Makefile.in
+++ b/Makefile.in
@@ -1,6 +1,6 @@
 ### @configure_input@
 
-# Copyright (C) 1992-2013 Free Software Foundation, Inc.
+# Copyright (C) 1992-2014 Free Software Foundation, Inc.
 
 # This file is part of GNU Emacs.
 
@@ -373,6 +373,11 @@ lib lib-src lisp nt: Makefile FRC
 # file src/foo.c forces dumping a new bootstrap-emacs, then re-byte-compiling
 # all preloaded elisp files, and only then dump the actual src/emacs, which
 # is not wrong, but is overkill in 99.99% of the cases.
+#
+# Note the use of single quotes in the value of vcswitness.
+# This passes an unexpanded $srcdir to src's Makefile, which then
+# expands it using its own value of srcdir (which points to the
+# source directory of src/).
 src: Makefile FRC
        dirstate='.bzr/checkout/dirstate';                              \
        vcswitness='$$(srcdir)/../'$$dirstate;                          \
@@ -380,6 +385,7 @@ src: Makefile FRC
        cd $@ || exit;                                                  \
        boot=bootstrap-emacs$(EXEEXT);                                  \
        [ ! -x "$$boot" ] || boot='';                                   \
+       echo "VCSWITNESS: $$vcswitness";\
        $(MAKE) all $(MFLAGS)                                           \
          CC='${CC}' CFLAGS='${CFLAGS}' CPPFLAGS='${CPPFLAGS}'          \
          LDFLAGS='${LDFLAGS}' MAKE='${MAKE}' BOOTSTRAPEMACS="$$boot"   \