On Fri, 4 Mar 2011, Dr. David Kirkby wrote:
The R manual says R will not build with gcc on 64-bit Solaris x86 with gcc
http://cran.r-project.org/doc/manuals/R-admin.html#Solaris
"Tests with gcc32 on ‘x86’ and ‘amd64’ have been less successful: ‘x86’
builds have failed on tests using complex arithmetic33, whereas on ‘amd64’
the builds have failed to complete in several different ways, most recently
with relocation errors for libRblas.so. "
I know what the "relocation errors" problem is. That library (and in fact two
other R libraries) all have non-PIC code in them, despite the fact the source
is compiled with the -fPIC option.
http://blogs.sun.com/rie/entry/my_relocations_don_t_fit
shows how to prove this. If one runs this command on Solaris:
$ elfdump -d libRblas.so | fgrep TEXTREL
there is some output showing that theres non-PIC code present in the R
library.
R is compiled with -fPIC on Solaris, but certain things can cause non-PIC
code to be generated even with that option. One is by the use of "computed
gotos" which is a gcc extension. I'm wondering if R uses any of these.
Yes -- in the byte code interpreter in eval.c
luke
I'd love to track down this problem, so R can build with gcc. R is used in
the Sage maths project
http://www.sagemath.org/
and R is the only component of Sage which will not build with gcc on 64-bit
Solaris x86. Many components will not build with Sun Studio, but this R issue
means we need to have two compilers, not just one.
--
Luke Tierney
Statistics and Actuarial Science
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa Phone: 319-335-3386
Department of Statistics and Fax: 319-335-3017
Actuarial Science
241 Schaeffer Hall email: l...@stat.uiowa.edu
Iowa City, IA 52242 WWW: http://www.stat.uiowa.edu
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