Why do I get "Process shell exited abnormally with code 1"?
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The most likely reason for this message is that the `env' program is
not properly installed. Compile this program for your architecture,
and install it with `a+x' permission in the architecture-dependent
Emacs program directory. (You can find what this directory is at your
site by inspecting the value of the variable `exec-directory' by typing
`C-h v exec-directory <RET>'.)
You should also check for other programs named `env' in your path
(e.g., SunOS has a program named `/usr/bin/env'). We don't understand
why this can cause a failure and don't know a general solution for
working around the problem in this case.
The `make clean' command will remove `env' and other vital programs,
so be careful when using it.
It has been reported that this sometimes happened when Emacs was
started as an X client from an xterm window (i.e., had a controlling
tty) but the xterm was later terminated.
See also `PROBLEMS' (in the `etc' subdirectory of the top-level
directory when you unpack the Emacs source) for other possible causes
of this message.