build failure on NetBSD 9.0

Hi, On NetBSD 9.0/x86_64, the newest release m4-1.4.18 exhibits a "make check" failure: CC test-localename.o ../../tests/test-localename.c: In function 'test_locale_name': ../../tests/test-localename.c:74:3: warning: implicit declaration of function 'uselocale'; did you mean 'setlocale'?

test failure on FreeBSD 12.0

Hi, On FreeBSD 12.0/x86, the newest release m4-1.4.18 and the newest snapshot from https://gitlab.com/gnu-m4/ci-distcheck/ both exhibit a "make check" failure: Checking ../../checks/189.eval @ ../doc/m4.texi:6405: Origin of test ../../checks/189.eval: stdout mismatch --- m4-tmp.17036/m4-xout

build failure on OpenBSD 6.5

Hi, On OpenBSD 6.5/x86_64, the newest release m4-1.4.18 exhibits a "make check" failure of 'test-localename': FAIL: test-localename = ../../tests/test-localename.c:183: assertion 'strcmp (name, "fr_FR.UTF-8") == 0' failed Abort trap (core dumped) FAIL test-localename (exit

build failure on Solaris 11.4

Hi, On Solaris 11.4/x86_64, the newest release m4-1.4.18 exhibits a "make check" failure of 'test-localename': FAIL: test-localename = ../../tests/test-localename.c:183: assertion 'strcmp (name, "fr_FR.UTF-8") == 0' failed ../../build-aux/test-driver: line 107: 14852: Abort(