GnuTLS 3.8.1 fails to (cross-)build for GNU/Hurd

CC common.lo

CC key_encode.lo

CC key_decode.lo

CC time.lo

In file included from ./../system.h:47,

from ./../gnutls_int.h:85,

from common.c:24:

./../pathbuf.h:28:25: error: 'PATH_MAX' undeclared here (not in a function)

28 | #define GNUTLS_PATH_MAX PATH_MAX

| ^~~~~~~~

./../pathbuf.h:31:19: note: in expansion of macro 'GNUTLS_PATH_MAX'

31 | char base[GNUTLS_PATH_MAX + 1];

| ^~~~~~~~~~~~~~~

In file included from ./../system.h:47,

from ./../gnutls_int.h:85,

from time.c:24:

./../pathbuf.h:28:25: error: 'PATH_MAX' undeclared here (not in a function)

28 | #define GNUTLS_PATH_MAX PATH_MAX

| ^~~~~~~~

./../pathbuf.h:31:19: note: in expansion of macro 'GNUTLS_PATH_MAX'

31 | char base[GNUTLS_PATH_MAX + 1];

| ^~~~~~~~~~~~~~~

In file included from ./../system.h:47,

from ./../gnutls_int.h:85,

from key_decode.c:24:

./../pathbuf.h:28:25: error: 'PATH_MAX' undeclared here (not in a function)

28 | #define GNUTLS_PATH_MAX PATH_MAX

| ^~~~~~~~

./../pathbuf.h:31:19: note: in expansion of macro 'GNUTLS_PATH_MAX'

31 | char base[GNUTLS_PATH_MAX + 1];

| ^~~~~~~~~~~~~~~

In file included from ./../system.h:47,

from ./../gnutls_int.h:85,

from key_encode.c:24:

./../pathbuf.h:28:25: error: 'PATH_MAX' undeclared here (not in a function)

28 | #define GNUTLS_PATH_MAX PATH_MAX

| ^~~~~~~~

./../pathbuf.h:31:19: note: in expansion of macro 'GNUTLS_PATH_MAX'

31 | char base[GNUTLS_PATH_MAX + 1];

| ^~~~~~~~~~~~~~~

make[5]: *** [Makefile:2330: time.lo] Error 1

make[5]: *** Waiting for unfinished jobs....

make[5]: *** [Makefile:2330: common.lo] Error 1

make[5]: *** [Makefile:2330: key_decode.lo] Error 1

make[5]: *** [Makefile:2330: key_encode.lo] Error 1

make[5]: Leaving directory '/tmp/guix-build-gnutls-3.8.1.drv-0/gnutls-3.8.1/lib/x509'