From: "Randy Maddox" <rmaddox AT isicns DOT com>
To: <djgpp AT delorie DOT com>
Cc: "Randy Maddox" <rmaddox AT isicns DOT com>
Subject: make and environment variables
Date: Wed, 28 Nov 2001 08:49:21 -0500
Message-ID: <000801c17813$7b453750$3502a8c0@nancy>
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Reply-To: djgpp AT delorie DOT com

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Hello,

I am using the WinDoze 2K version of DJGPP as found in the zip archive
djdev204_alpha_win2k.zp and have encountered an issue with the make utility,
which seems to find environment variables only if the name used in the make
file is in all uppercase, regardless of the case used to name and set the
environment variable.  For example:

- set an environment variable using a mixed case name

> set EnvVariable=some_value

- display that variable using set to verify name is mixed case

> set
DJGPP=c:\djgpp\DJGPP.ENV
EnvVariable=some_value
HOMEDRIVE=C:

So far so good.  Now run make using the following makefile:

# sample make file

all:
        @echo EnvVariable = $(EnvVariable)
        @echo ENVVARIABLE = $(ENVVARIABLE)

#end of this file

This generates the following output:

>make
EnvVariable =
ENVVARIABLE = some_value

As you can see, the expression $(EnvVariable) evaluates to an empty string,
while $(ENVVARIABLE) evaluates to the value of EnvVariable.

Using make -v reports the following:

>make -v
GNU Make version 3.79.1, by Richard Stallman and Roland McGrath.
Built for i386-pc-msdosdjgpp
Copyright (C) 1988, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000
        Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.

Report bugs to <bug-make AT gnu DOT org>.

Is this a bug?  Is there a work-around?  I did report this to
bug-make AT gnu DOT org initially, but they bounced me back to you.

Thanks.

Randy Maddox
C++ Author, Architect, Developer
703-883-8088 ext. 119 (8 am to 4:30 pm Eastern USA time)
rmaddox AT isicns DOT com


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