This is a package, so it is not using config.h. It is using
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#else
extern char *alloca(size_t);
#endif
and hence will have whatever the problem is with having that declaration.
The basic problem is that autoconf assumes that if alloca is defined
anywhere, it is defined in alloca.h. So we need to use something other
than the standard macros.
Is there a macro FreeBSD defines? If so it may be easiest to just make
use of it.
On Tue, 7 Jun 2005, Simon Urbanek wrote:
On Jun 7, 2005, at 12:36 PM, Rainer Hurling wrote:
One first reaction to your suggestions.
[EMAIL PROTECTED] wrote:
On Mon, 23 May 2005 [EMAIL PROTECTED] wrote:
R-2.1.0 fails to compile on the newest release of FreeBSD, complaining
about
undefined references to __builtin_alloca. On FreeBSD, alloca() is
declared in
stdlib.h, not alloca.h as the R sources expect. Therefore,
HAVE_DECL_ALLOCA
does not get set, so the R sources declare alloca() after it has already
been
#defined by stdlib.h.
A possible fix is to modify the configure script to look for the
declaration of
alloca() in stdlib.h (perhaps after it fails to find it in alloca.h).
It is already supposed to, so it is not finding the declaration there
either. If you look up the definition of
AC_CHECK_DECLS([alloca], , , [#include <alloca.h>])
it searches in stdlib.h. Can you please send us the appropriate part of
config.log? It may be that this is failing because alloca.h is not found
(but AC_FUNC_ALLOCA is making the same assumptions).
Perhaps the easiest way out is to override the setting on FreeBSD: can you
please confirm that manually changing
#define HAVE_DECL_ALLOCA 1
in config.h works?
Changing "#define HAVE_DECL_ALLOCA" to 1
in line 81 of R-2.1.0/src/include/config.h
gives me the following stopping:
mkdir ../../../../library/grDevices/libs
building package 'graphics'
mkdir ../../../library/graphics
mkdir ../../../library/graphics/R
mkdir ../../../library/graphics/demo
mkdir ../../../library/graphics/po
mkdir ../../../library/graphics/man
Error in dyn.load(x, as.logical(local), as.logical(now)) :
unable to load shared library '/usr/local/R-2.1.0/library/
grDevices/libs/grDevices.so':
/usr/local/R-2.1.0/library/grDevices/libs/grDevices.so: Undefined symbol
"__builtin_alloca"
Execution halted
Did you run a new, clean build? From the output it seems as if you just
changed the file in your old build and typed make - obviously that doesn't
help at all, because the setting must the changed *before* you start
building. So if you didn't do so, please remove the build, unpack the sources
again, run configure, change the ALLOCA define and then build.
Cheers,
Simon
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--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
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