#14406: Various prereq fixes
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Reporter: jdemeyer | Owner: drkirkby
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-5.9
Component: porting | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Jeroen Demeyer | Merged in:
Dependencies: | Stopgaps:
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Comment (by jpflori):
Replying to [comment:21 jpflori]:
> Replying to [comment:20 jpflori]:
> > Replying to [comment:19 leif]:
> > > Replying to [comment:15 jdemeyer]:
> > > > Replying to [comment:9 leif]:
> > > > > Actually, we need both `sqrtl()` and `[lt]gammal()` unless we
build Cephes
> > > > It seems not, Cygwin doesn't have `sqrtl()`, nor does it build
Cephes. Despite this, Sage builds.
> > >
> > > IIRC, because we (still) have some special-casing on Cygwin w.r.t.
at least (just?) the (`long double`) gamma functions.
> > I'll have a look.
> Indeed, we cheat for logl/sqrtl/tgammal/lgammal in
sage/symbolic/pynac_cc.h just as we do with the R patch for logl.
And as we only cheat on Cygwin, this implies Cephes is definitively needed
on FreeBSD for this file already.
> > >
> > > [[BR]]
> > >
> > > To repeat Karl-Dieter's question: What is Cephes then needed for at
all [on e.g. FreeBSD]?
> > >
> > Maybe for complex functions "c*" (which are now in Cygwin libm but
used not to be)?
> > > I.e., we should probably check for those functions Cephes provides
(and Sage needs) [unless we're on FreeBSD where Cephes gets built anyway,
or `SAGE_PORT` is set].
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14406#comment:22>
Sage <http://www.sagemath.org>
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