core dump on 0.64.2 SPARC/Solaris 2.6 in eigen (PR#223)

[Kurt Hornik]

>>>>> ripley  writes:

> On 10 Jul 1999, Peter Dalgaard BSA wrote:
>> > On Fri, 9 Jul 1999 bates@stat.wisc.edu wrote:
>> > 
>> > > ..
>> > > R is now configured for sparc-sun-solaris2.6
>> > > 
>> > >   Source directory:         .
>> > >   Installation directory:   /unsup/R-0.64.2
>> > >   C compiler:               gcc -g -O2
>> > >   FORTRAN compiler:         g77 -O2

> (Why is the default to have -g for C but not Fortran? That has puzzled me
> before now. At least for gcc/g77 we could be consistent.)

Simply an omission.  Autoconf does almost everything for the C compiler
and basically nothing for the Fortran compiler.  R_PROG_F77 now sets
FFLAGS to "-g -O2" for g77 unless FFLAGS is already set.

> The remedy (as usual) seems to be not to optimize when compiling eigen.f
> under egcs-1.1.2.

Should we special-case this into configure?

-k
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