Build freezes on macOS 15: `Your compiler chokes on the "volatile" modifier`

[barracuda156]

make: Entering directory `/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_mosml/mosml/work/mosml-13c581aec46eea134e478f2e2b6456278e36ecce/src'
cd config; /Library/Developer/CommandLineTools/usr/bin/make all
make[1]: Entering directory `/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_mosml/mosml/work/mosml-13c581aec46eea134e478f2e2b6456278e36ecce/src/config'
sh autoconf /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_mosml/mosml/work/compwrap/cc/usr/bin/clang
Checking the sizes of integers and pointers...
Wow! A 64 bit architecture!
Something went wrong during endianness determination.
You'll have to figure out endianness yourself
(option MOSML_BIG_ENDIAN in m.h).
Your compiler chokes on the "volatile" modifier.
Never mind, we'll do without it.
Your compiler chokes on the "volatile" modifier.
Never mind, we'll do without it.

Then the final lines keep repeating indefinitely.

See also: https://trac.macports.org/ticket/71070

[andrey-perevitskiy]

You can try build with GNU C89 the standard:

CC="gcc --std=gnu89" make --environment-overrides world

Possibly, it is just due to an error in ./config/auto-aux/endian.c, where arbitrary argument quantity supposing in main(). (Probably, it should be void) C89 will not error implicit integer as return value of main(), but GNU C89 also allows c++ comments.