Build failure due to MINSIGSTKSZ with glibc 2.33

[nalimilan]

glibc 2.33 deprecated the MINSIGSTKSZ constant in favor of sysconf (_SC_MINSIGSTKSZ):
https://sourceware.org/git/?p=glibc.git;a=commit;h=6c57d320484988e87e446e2e60ce42816bf51d53

This makes the build fail on Fedora Rawhide due to these lines (both on 1.6.0-rc1 and master):

julia/src/task.c

Lines 67 to 73 in a12d0ff

	// empirically, jl_finish_task needs about 64k stack space to infer/run
	// and additionally, gc-stack reserves 64k for the guard pages
	#if defined(MINSIGSTKSZ) && MINSIGSTKSZ > 131072
	#define MINSTKSZ MINSIGSTKSZ
	#else
	#define MINSTKSZ 131072
	#endif

make -j2
[...]
    CC src/task.o
In file included from /usr/include/signal.h:315,
                 from /home/fedora/nalimilan/julia/src/task.c:31:
/home/fedora/nalimilan/julia/src/task.c:69:29: error: missing binary operator before token "("
   69 | #if defined(MINSIGSTKSZ) && MINSIGSTKSZ > 131072
      |                             ^~~~~~~~~~~

FWIW, this only happens with -D_GNU_SOURCE, but AFAICT Julia needs it.

(See also https://bugzilla.redhat.com/show_bug.cgi?id=1928696.)

Cc: @vtjnash who touched these lines last.

[tpapp]

I am getting this error on Ubuntu 21.10, is there a workaround?

[tpapp]

I think that #41860 fixes this but it wasn't backported into release-1.7, which I was trying to compile.

[nalimilan]

Cool. #39822 has been marked for backport, so closing.

EDIT(vtjnash): that link should be to #41860, instead of linking this issue to itself