Hello,
On Fri, Oct 15, 2004 at 10:13:15AM +0200, [EMAIL PROTECTED] wrote:
> > WEBDIR=${WEBDIR-\$(pkgdatadir)}
>
> Isn't it ${WEBDIR:-\$(pkgdatadir)}?
> ^^^
``man bash'' says:
... omitting the colon results in a test only for a parameter that is unset.
As for the portability, autoconf manual says:
`${VAR:-VALUE}'
Old BSD shells, including the Ultrix `sh', don't accept the colon
for any shell substitution, and complain and die.
And it doesn't seem to have anything against plain ${VAR-VALUE}.
We usually want to respect a parameter if it is set to empty string.
This, together with the small portability issue, probably led to the
decision to use ${VAR-VALUE} in autoconf.
HTH,
Stepan Kasal
