#14151: Update GMP-ECM to 6.4.4
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Reporter: zimmerma | Owner: tbd
Type: enhancement | Status: new
Priority: major | Milestone: sage-5.8
Component: packages | Resolution:
Keywords: spkg | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Comment (by leif):
Hi Paul,
I noticed a while ago that it is still necessary to ''explicitly''
`--disable-sse2` (`export ECM_CONFIGURE="--disable-sse2"` when building
Sage) on a Pentium III (which doesn't have SSE2). (In Sage, SSE2 also
gets disabled if one uses `SAGE_FAT_BINARY=yes` for 32-bit builds IIRC,
but vanilla GMP-ECM tries to use SSE2 even when configured for
`pentium3-*-*`, implicitly or explicitly.)
Unfortunately my Pentium III meanwhile died, and I haven't tried to revive
it yet, but this was true for the latest GMP-ECM 6.4.x at that time as
well. I vaguely remember the problem in the `configure` test was that it
only tries to ''compile'' with SSE2 instructions, but doesn't try to
''run'' the resulting program (if appropriate, i.e., when not cross-
compiling). Alternatively, or in addition, SSE2 should simply get
disabled if the target is `pentium-*-*|pentium2-*-*|pentium3-*-*` etc.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14151#comment:2>
Sage <http://www.sagemath.org>
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