GUB fails to rebuild, configure issues?

[Graham Percival]

Odd behavior: if I rm -rf target/*/build/lilypond*,
target/*/src/lilypond*, target/*/status/lilypond*, and
target/*/installer/lilypond*   (I'm trying to be safe), it seems
to build ok.  But if I try to rebuild with "make lilypond", or if
I forget to clean one directory, it fails.

I thought that I'd seen error messages about needing to remove
config.hh, but this last time that I cleaned things out and
generated the error, there's no such message.


Here's the error from target/linux-x86/log/build.log:

----
 *** Stage: compile (lilypond, darwin-ppc)
invoking cd
/home/lilypond/gub/target/darwin-ppc/build/lilypond-git.sv.gnu.org--lilypond.git-master
&& make -j1   TARGET_PYTHON="/usr/bin/env python"
************************************************************
configure.in and/or stepmake/aclocal.m4 changed!
Please regenerate configure with autogen.sh.
************************************************************
make: ***
[/home/lilypond/gub/target/darwin-ppc/src/lilypond-git.sv.gnu.org--lilypond.git-master/configure]
Error 1
Command barfed: cd
/home/lilypond/gub/target/darwin-ppc/build/lilypond-git.sv.gnu.org--lilypond.git-master
&& make -j1   TARGET_PYTHON="/usr/bin/env python"
Traceback (most recent call last):
...

Cheers,
- Graham