#12954: Make MPIR support SAGE_FAT_BINARY on all systems
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Reporter: vbraun | Owner: tbd
Type: defect | Status: needs_work
Priority: blocker | Milestone: sage-5.0.1
Component: packages | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Jeroen Demeyer | Merged in:
Dependencies: | Stopgaps:
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Comment (by leif):
Replying to [comment:11 vbraun]:
> `SAGE_FAT_BINARY` should be synonymous with `SAGE_GENERIC_BINARY`,
though for historical reasons it isn't named well. From
http://www.sagemath.org/doc/installation/source.html:
>
> SAGE_FAT_BINARY - to prepare a binary distribution that will run on the
widest range of target machines, set this variable to "yes"
That description is certainly insufficient (or, to be more precise, one
shouldn't read it from right to left). One should in general not prepare
"fat" binaries on relatively new (e.g. Core i7) CPUs -- unless one knows
what one's doing... ;-)
IMHO the main purpose of `SAGE_FAT_BINARY` is to avoid the use of
processor-specific ("hand-written") ''assembly code'' (and prevent Sage
from using things like `-march=native`); it's still up to the
''distributor'' to make sure the compiler is targeted to the ''desired''
CPU family (whichever that is).
[[BR]]
Doing some "sanity check" upon `sage -bdist` isn't all bad, but of course
heavily depends on what (limited) architecture a specific binary
distribution is supposed to be run on.
----
I never liked `MPIR_EXTRA_OPTS` (for additional options to be passed to
MPIR's `configure`), but it's named like this for consistency with other
spkgs, i.e., historical reasons. A couple of spkgs (or every spkg that
supports such) use `${PKG_NAME}_EXTRA_OPTS`.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12954#comment:26>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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