On Fedora Linux, I fetched nhc98-1.18.tar.gz (Linux executable).
Got some relatively innocuous diagnostics from configure and make install, but one stood out:
./configure: line 594: src/runtime/nhc98heap.c: No such file or directory
Bulling through anyway, I did an installation. and compiled a hello world program.
The result appears to be related to the configure trouble:
OS allocated a heap in high memory (>0x80000000)
which breaks this program's run-time system.
hpStart=0xb7d96008, hpEnd=0xb7e0b308
