On Thu, Apr 26, 2007 at 10:06:40PM -0400, H.S. wrote: > > In a makefile, if I have a rule to: > echo $(HOSTNAME); > > it return a blank line, as if the variable is not set. Echoing $(HOME) > works, $(LANG) works, what is the deal with $(HOSTNAME)?
HOSTNAME is a variable that bash(1) sets - but it is *not* exported. You
can force it to be exported by
$ export HOSTNAME
in your login script.
But ... relying on bash is decidedly non-portable. Why not use
`hostname`
instead?
> Echoing $(HOSTNAME) on a command prompt works though.
It does? Perhaps you're not using bash after all? I get:
-bash: HOSTNAME: command not found
Note: the $(command) construct in bash is functionally identical to
`command` ...
Perhaps you meant ${HOSTNAME} (note the curly brackets) at the command
prompt?
--
Karl E. Jorgensen
[EMAIL PROTECTED] http://www.jorgensen.org.uk/
[EMAIL PROTECTED] http://karl.jorgensen.com
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