I see that there was a report (and a workaround) for $(realpath foo//) on AIX, but AIX realpath has bigger problems. Paths containing //.. will confuse AIX realpath causing it to return ENOENT, so Make's realpath function returns nothing, e.g. with GNU Make 4.4.1
gcc119:~/tmp$ echo 'all: ; @echo ">>>" $(realpath /home/jwakely/tmp/../tmp)' | gmake -f- >>> /home/jwakely/tmp gcc119:~/tmp$ echo 'all: ; @echo ">>>" $(realpath /home/jwakely/tmp//../tmp)' | gmake -f- >>> I haven't been able to reproduce this with anything except "//.." but there might be other bugs with realpath on AIX.
