#12347: make install broken in Sage 4.8
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Reporter: zimmerma | Owner: GeorgSWeber
Type: defect | Status: needs_work
Priority: major | Milestone: sage-5.0
Component: build | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Comment(by jhpalmieri):
Replying to [comment:9 ppurka]:
> @jhpalmieri: I added -u to make sure that the second time `make install`
is run, cp does not go around copying the files all over again.
Solaris is a supported platform for Sage on which the `-u` option is not
recognized, so it doesn't matter too much why you added it: it's not going
to work.
> The options `-r`, `-v` were all present from before.
But while you're fixing other things, you might as well fix this. Just
use `-R` or `-pR` instead.
> `ln -f` was needed in case the user ran `make install` yet again,
otherwise ln would give error. If the first invocation of make install
doesn't fail, then there is no need to use -f with ln.
Same comment as before: it's not going to work this way, so you should do
it a different way. (For example, first run 'rm -f ...' on the link, then
do 'ln -s ...'.)
> If `cp` is unreliable then what is the alternative (it is actually quite
reliable on linux with the `-a` option, that is, it copies symlinks
properly)? Alternatively, can we assume that `rsync` is available on all
platforms and use rsync instead?
I think that 'cp -pR' is reliable on all platforms. Note also that the
'make install' option says "Experimental use only!", so I don't think it's
been well-maintained or supported, or even used much, which is why, for
example, the `-v` option for cp wasn't removed earlier. But if you're
working on this, you should do it right, so that it works on all supported
platforms. Using POSIX-standard commands should be completely reliable;
every platform's version of 'cp' should support the POSIX-standard options
for cp.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12347#comment:10>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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