#7873: Fix 'gap' to remove usage of '$RM' and replace wth 'rm'
------------------------+---------------------------------------------------
   Reporter:  drkirkby  |       Owner:  GeorgSWeber 
       Type:  defect    |      Status:  needs_review
   Priority:  major     |   Milestone:  sage-4.3.1  
  Component:  build     |    Keywords:              
Work_issues:            |      Author:  David Kirkby
   Upstream:  N/A       |    Reviewer:              
     Merged:            |  
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Comment(by drkirkby):

 Replying to [comment:3 jhpalmieri]:
 > Two comments: you've changed "$CP" to "cp" even though $CP is still
 defined in sage-env.  Does this matter?

 No. I looked at that before deciding to replace them, but could see no
 reason not to in this case. One was a simple copy
 {{{
 cp patches/gap_cygwin "$SAGE_LOCAL"/bin/gap
 }}}
 the other was recursive, but simply used the POSIX compatible '-r' option.
 There seemed to be no reason to use any other version of cp in such cases.

 The GNU verison of 'cp' has some non-POSIX options (-a being one of them).
 Had that be iused in gap, then I would have left the $CP, but in this
 case, with only a very standard option used, there is no reason not to use
 whatever version of 'cp' is in the path first. Any 'cp' will work.

 > Also (and this is not new -- it happens with the old spkg, too): when I
 install the spkg, I get this at the end:
 > {{{
 > cp: ../../bin is a directory (not copied).
 > cp: cp: No such file or directory
 > }}}
 > Any ideas why?  Anyway, since gap works, maybe we shouldn't worry about
 this right now.

 Looking at the 'cp' (or $CP) command I could not work out what spkg-
 install was trying to do (I just posted something on sage-devel about it).
 The code simply makes no sense to me.

 Since
  * The package functions, despite the errors.
  * I wanted to do it asap, in case it caused an issue with the sage-env
 ticket (#7818)
  * I could not work out what was the intended behavior. 'cp' is used in a
 way I'd never use it.
  * There is talk on sage-devel of updating gap

 it seemed like it was best left to another day. Like the fact CC and CXX
 get unset. I think it would be wise to find a way around the issues this
 creates, but again I did not attempt to fix it. That will certainly
 present a problem if one tried to use a Sun compiler to build gap.

 I'm not even convinced this will work in 64-bit mode on OS X, as it does
 not have the SAGE64 stuff which every other spkg-install file has.

 So, overall, the changes I made were only necessary ones, and no others.

 Dave

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7873#comment:4>
Sage <http://www.sagemath.org>
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