Hello all,
I have spent the last week going through the configure/configure.ac
file, basically line-by-line.
I am finding things related to AIX that have not been working well
(i.e., cleanly) for 32-bit builds and are a "root-cause" for 64-bit
builds to finish cleanly.
Trying to keep this short - you can also just skip to end to see my
question!
With regard to AIX, there is a lot of difficulty re: 64-bit and default
libraries.
a) AIX aka IBM built-libraries contain both 32 and 64 bit members, so
there is no need for lib64
b) AIX Toolbox (-like) distros, built on GCC do have 32 and 64 bit
directories, and while they may use lib64 the gcc compiler uses ppc64
for it's 64-bit libraries. "Happy standardization"
c) IMHO - as I cannot speak for IBM - the "preference" for AIX is to not
use /usr/local (Someone, maybe it
was BULL, opted for /opt/freeware as a prefix. That is where AIXTOOLBOX
(family) install files. And the fun here is - some packages have mixed
32 and 64 bit members, others use the lib64 convention.
In any case, forcing /usr/local (when $prefix is defined to something
else) may break things (it has in earlier 'package' builds at least.)
and the way it is now, /usr/local gets put in front of anything else).
${rhome} - not 'simple' to find where it is defined (not in config.ac,
not in m4/R.m4 - that I understand)
Guessing here, but for 64-bit I expect this may be introducing one of
the problems I have had:
## As from R 3.2.0 split up -L... and -lR
if test "${want_R_shlib}" = yes; then
LIBR0="-L\$(R_HOME)/lib\$(R_ARCH)"
LIBR1=-lR
else
LIBR0=
LIBR1=
fi
And then, ignoring the rest until I get to:
## <FIXME>
## Completely disable using libtool for building shlibs until libtool
## fully supports Fortran and C++.
## AC_ARG_WITH([libtool],
## [AS_HELP_STRING([--with-libtool],[use libtool for building shared
libraries [yes]])],
## [use_libtool="${withval}"],
## [use_libtool=yes])
## AM_CONDITIONAL(USE_LIBTOOL, [test "x${use_libtool}" = xyes])
## </FIXME>
Hence the question - is there a real interest on someone (like me) to
examine libtool usage on a slightly used platform?
Michael
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