[Rd] Problems building R 2.9.0... on SGI and Sun once again
atossava at cc.helsinki.fi
Wed Apr 29 11:55:44 CEST 2009
(This is really in response to Peter Dalgaard, not to myself)
> This seems to come from constructions of the form
> for i in $FOO : do .... ; done
> If $FOO is empty, then the resulting "for i in ;" is a syntax error
> with some versions of bash and sh.
Given that one should generally be writing scripts for the Bourne
shell, it is IMHO the case that "for i in ;" is a syntax error, period.
> Current Linux versions of bash do not have that behaviour.
...violating Bourne shell compatibility in yet another way...
> One workaround could be to upgrade bash.
If R is to be an application that is not specific to (recent distributions
of) Linux, one should expect and code for systems that may not have bash
at all but only the Bourne shell.
> Another workaround could be to safeguard the for-loop with
> test "$FOO" != "" && for i in $FOO : do .... ; done
> in all of the Makefiles where this can be an issue.
That is one of the possible ways in which R developers could, I
suppose, address the issue.
Atro Tossavainen (Mr.) / The Institute of Biotechnology at
Systems Analyst, Techno-Amish & / the University of Helsinki, Finland,
+358-9-19158939 UNIX Dinosaur / employs me, but my opinions are my own.
< URL : http : / / www . helsinki . fi / %7E atossava / > NO FILE ATTACHMENTS
More information about the R-devel