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> Native Compilation
post Nov 1 2006, 11:49 AM
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From: Brugg, Schweiz
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Hi together,
once or twice a year I try to compile R (www.r-project.org) for my C760. For compilation of R gcc and g77 are needed and later the R-binary is used to compile further modules (which makes it diffult to build with a cross-compiler
My latest attempt was a native compilation based on OZ (gpe) and the native sdk + additional packages as listed in the OZ wiki.
Configuration and compilation was without problems until linking of the main R binary.
Linking failed with the following message:

gcc -Wl,--export-dynamic -L/usr/local/lib -o R.bin Rmain.o CConverters.o CommandLineArgs.o Rdynload.o Renviron.o RNG.o apply.o arithmetic.o apse.o array.o attrib.o base.o bind.o builtin.o character.o coerce.o colors.o complex.o connections.o context.o cov.o cum.o dcf.o datetime.o debug.o deparse.o deriv.o dotcode.o dounzip.o dstruct.o duplicate.o engine.o envir.o errors.o eval.o format.o fourier.o gevents.o gram.o gram-ex.o graphics.o identical.o internet.o iosupport.o lapack.o list.o localecharset.o logic.o main.o mapply.o match.o memory.o model.o names.o objects.o optim.o optimize.o options.o par.o paste.o pcre.o platform.o plot.o plot3d.o plotmath.o print.o printarray.o printvector.o printutils.o qsort.o random.o regex.o registration.o relop.o rlocale.o saveload.o scan.o seq.o serialize.o size.o sort.o source.o split.o sprintf.o startup.o subassign.o subscript.o subset.o summary.o sysutils.o unique.o util.o version.o vfonts.o xxxpr.o ../unix/libunix.a ../appl/libappl.a ../nmath/libnmath.a -L../../lib -lRblas -lg2c -lm -lgcc_s ../extra/zlib/libz.a ../extra/bzip2/libbz2.a ../extra/pcre/libpcre.a -lreadline -ldl -lm
/lib/ld-linux.so.2: undefined reference to `errno'
collect2: ld returned 1 exit status

At the moment I have no idea if this is related to R or if it is a OZ problem. Did someone encounter a similar problem before?
Many thanks, Georg
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post Nov 8 2006, 07:22 AM
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One (random) point to note.

The need to pass ac_cv_c_bigendian=yes to configure is related to the fact that the current OZ soft-float implementation, fpa, keeps all fp numbers in bigendian format in memory. Therefore R needs to be told this. I do wonder what this will do when writing to files as R will think it's on a bigendian system. The same is true of Octave, but it automatically checks the endianness (iirc), again by looking at an fp number, so the same problem will probably manifest itself.

This will be sorted out when we move to Angstrom as eabi uses vfp, which keeps fp numbers in the same endianness as the processor.

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post Nov 30 2007, 12:26 AM
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QUOTE(lardman @ Nov 8 2006, 09:22 AM) *
This will be sorted out when we move to Angstrom as eabi uses vfp, which keeps fp numbers in the same endianness as the processor.

indeed in Angstrom, configure: loading site script /home/gordon/oe/org.openembedded.dev/site/endian-little
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