The AIX build of the development version isn't quite working due to a
problem in the automatic symbol extraction process.
Compilation of R itself goes fine, but then in the script tools/ldAIX4
doesn't extract the symbols from arithmetic.o. This is because
bash-2.01$ nm arithmetic.o
nm: arithmetic.o: 0654-206 Cannot process the symbol table.
As a result, R_finite is not exported and the vfonts module cannot be
built. If the necessary symbols are added by hand to etc/R.exp then the
rest of the build proceeds normally.
Compiling arithmetic.c doesn't produce any errors (gcc) and the symbol
table problem doesn't seem to happen for any other object file.