Martin Maechler <[EMAIL PROTECTED]> writes:
> and compilation (of course) goes fine till the crucial linking
> stage :
>
> gcc -shared -o libRlapack.so dlapack0.lo dlapack1.lo dlapack2.lo dlapack3.lo
> cmplx.lo -lf77blas -latlas -L/usr/lib64
> -L/usr/lib/gcc-lib/x86_64-redhat-linux/3.2.3
> -L/usr/lib/gcc-lib/x86_64-redhat-linux/3.2.3/../../../../lib64
> -L/usr/lib/gcc-lib/x86_64-redhat-linux/3.2.3/../../.. -L/lib/../lib64
> -L/usr/lib/../lib64 -lfrtbegin -lg2c -lm -lgcc_s
> /usr/bin/ld: /usr/local/lib/libf77blas.a(xerbla.o): relocation R_X86_64_32 can not
> be used when making a shared object; recompile with -fPIC
> /usr/local/lib/libf77blas.a: could not read symbols: Bad value
> collect2: ld returned 1 exit status
>
> and I'm stuck to some extent.
> Note that the "recompile with -fPIC" must related to the
> contents of ATLAS' libf77blas.a itself (or to "xerbla.o" more
> concretely), since all of R's dlapack[0-3].lo are of course
> compile with -fPIC.
>
> I tend to conclude that I do need shared versions of ATLAS'
> libraries? If yes, I think I've seen instructions on how to
> build these. Where?
> If these are really needed, I think I should add them to the
> corresponding "R administration manual" section, right?
I don't think we actually got them written down (thank you for
volunteering...) but it isn't terribly hard. There are just two basic
tricks:
- add -fPIC all over the place during configure.
- after building you'll get a bunch of .a files. These can be
converted to .so using
ld -shared -o libfoo.so --whole-archive libfoo.a
One thing I haven't gotten around to yet is the ATLAS/LAPACK
integration mentioned on
http://math-atlas.sourceforge.net/errata.html#completelp
--
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907
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