bison 3.7.1 failing to build on Centos 7: verify_NSIG_constraint

[Paul Smith]

The latest Bison release 3.7.1 is not compiling for me, and it appears
to be a gnulib issue.

Here's the failure:

gcc -DEXEEXT=\"\" -I. -I./lib -Ibison-3.7.1 -Ibison-3.7.1/lib \
  -DDEFAULT_TEXT_DOMAIN=\"bison-gnulib\" -march=nehalem -mtune=intel \
  -ffile-prefix-map=bison-3.7.1/= -O2 -fPIC -static-libgcc \
  -MT lib/libbison_a-quotearg.o -MD -MP \
  -MF lib/.deps/libbison_a-quotearg.Tpo -c -olib/libbison_a-quotearg.o \
  `test -f 'lib/quotearg.c' || echo 'bison-3.7.1/'`lib/quotearg.c
In file included from /usr/include/sys/param.h:28,
                 from bison-3.7.1/lib/minmax.h:34,
                 from bison-3.7.1/lib/quotearg.c:33:
./lib/signal.h:682:13: error: size of array 'verify_NSIG_constraint' is negative
  682 | typedef int verify_NSIG_constraint[NSIG <= 32 ? 1 : -1];
      |             ^~~~~~~~~~~~~~~~~~~~~~
make[2]: *** [Makefile:5457: lib/libbison_a-quotearg.o] Error 1

All of these files (quotearg.c, minmax.h, signal.h) are coming from
gnulib.

Obviously, Linux has a lot more than 32 signals defined normally... so
I feel like I'm missing something here about what this check is
supposed to do and how it's supposed to work...

Anyone have any ideas?