Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!RENOIR.BERKELEY.EDU!mlvdv
From: mlvdv@RENOIR.BERKELEY.EDU (Michael Van De Vanter)
Newsgroups: gnu.emacs.bug
Subject: bug report
Message-ID: <8902151847.AA28072@renoir.Berkeley.EDU>
Date: 15 Feb 89 18:47:20 GMT
Sender: daemon@tut.cis.ohio-state.edu
Distribution: gnu
Organization: GNUs Not Usenet
Lines: 63


General nature:

This problem appears to involve some interaction among GNU Emacs,
make, and csh on Suns, while propagating csh environments.


Environment:

GNU Emacs version 18.51.3.  We have reproduced the bug on several Suns
(SunOS 3.4), under both SunView and X11R3.  Note that we CANNOT
reproduce it on our VAX (same Emacs version).  On our Suns, the
presence GNU Emacs in the chain of propagation is the only controlling
factor we've been able to isolate.

The bug occurs with no .emacs and .emacs_csh files present.


The behavior:

Create the following makefile, making sure you get the leading tabs on
lines 2 and 3.

-----test.Makefile-------------------------------------------------------
test :
	@echo In Makefile FOO=${FOO} and FOOB=${FOOB}
	@echo In csh FOO=$${FOO} and FOOB=$${FOOB}
----------------------------------------------------------------------

In an ordinary shell (e.g. SunView cmdtool or shelltool, under SUNos
3.4), the test runs as follows:

	1>setenv FOO value1
	2>setenv FOOB value2
	3>make -f test.Makefile
	In Makefile FOO=value1 and FOOB=value2
	In csh FOO=value1 and FOOB=value2
	4>

Then start emacs in the same shell, start a shell inside emacs, and
immediately execute the same makefile.  The result, inside the emacs
shell, is:

	manzanita.Berkeley.EDU% make -f test.Makefile
	In Makefile FOO=value1 and FOOB=value2
	In csh FOO=value1 and FOOB=
	manzanita.Berkeley.EDU%

The value of the environment variable with the longer name has gotten
lost along the way.  

Observation: in our trials, it seems to happen only when one variable
name is a prefix of the other, and the value of the longer is always
the one that gets lost.


	M. L. Van De Vanter
	Computer Science Division
	571 Evans Hall
	University of California, Berkeley
	Berkeley, CA  94720
	(415) 642-4611
	mlvdv@Renoir.Berkeley.Edu