Karl E. Jorgensen wrote:
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?
Yes, I discovered that yesterday and it works in the Makefile:
HOST=`hostname`
and I just use $(HOST) later in the Makefile.
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?
Yes. Typo while writing the above message.
Thanks,
->HS
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