#13348: Set CPATH in sage-env
----------------------------------+-----------------------------------------
       Reporter:  jdemeyer        |         Owner:  GeorgSWeber   
           Type:  enhancement     |        Status:  closed        
       Priority:  major           |     Milestone:  sage-5.4      
      Component:  build           |    Resolution:  fixed         
       Keywords:                  |   Work issues:                
Report Upstream:  N/A             |     Reviewers:  Volker Braun  
        Authors:  Jeroen Demeyer  |     Merged in:  sage-5.4.beta2
   Dependencies:                  |      Stopgaps:                
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Description changed by jdemeyer:

Old description:

> Since we're setting `LIBRARY_PATH` in `sage-env` (which is the ''compile-
> time'' equivalent of `LD_LIBRARY_PATH`, corresponding to the compiler
> flag `-L`), we should analogously set `CPATH` to `SAGE_LOCAL/include`
> (corresponding to the compiler flag `-I`).  This is already done in the
> `spkg-install` file for `sagenb-0.10.2`.
>
> Within Sage, `SAGE_LOCAL` effectively acts as installation prefix, so
> this is the logical thing to do.  A GCC compiled within Sage will already
> look at `SAGE_LOCAL/include` by default.
>
> This doesn't immediately change anything, but it will allow simplifying
> many `spkg-install` files by not having to care about
> `-I$SAGE_LOCAL/include` anymore.

New description:

 Since we're setting `LIBRARY_PATH` in `sage-env` (which is the ''compile-
 time'' equivalent of `LD_LIBRARY_PATH`, corresponding to the compiler flag
 `-L`), we should analogously set `CPATH` to `SAGE_LOCAL/include`
 (corresponding to the compiler flag `-I`).  This is already done in the
 `spkg-install` file for `sagenb-0.10.2`.

 Within Sage, `SAGE_LOCAL` effectively acts as installation prefix, so this
 is the logical thing to do.  A GCC compiled within Sage will already look
 at `SAGE_LOCAL/include` by default.

 This doesn't immediately change anything, but it will allow simplifying
 many `spkg-install` files by not having to care about
 `-I$SAGE_LOCAL/include` anymore.

 '''Apply''' [attachment:13348_CPATH.patch] to `SAGE_ROOT`.

--

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13348#comment:8>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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