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Emacs is currently not compatible with the dynamic stack sizes in upcoming glibc 2.34 (soon to be imported into the buildroot). The build fails like this:

../../src/sysdep.c:1821:22: error: variably modified 'sigsegv_stack' at file scope
 1821 | static unsigned char sigsegv_stack[SIGSTKSZ];
      |                      ^~~~~~~~~~~~~
make[2]: Leaving directory '/builddir/build/BUILD/emacs-27.2/build-gtk/src'

This Fedora commit

commit 181aafcdb7ee2fded9fce4cfc448f27edccc927f
Author: Scott Talbert <swt>
Date:   Sat Mar 27 00:10:16 2021 -0400

    Fix FTBFS with glibc 2.34

backports upstream commit f97e07ea807cc6d38774a3888a15091b20645ac6 ("Port alternate signal stack to upcoming glibc 2.34"), addressing this issue for now.

You can test a fix before glibc 2.34 is merged using this command:

koji -p stream build --scratch c9s-build-side-102-stack-gate git+https://gitlab.com/redhat/centos-stream/rpms/emacs#origin/c9s

*** Bug 1991941 has been marked as a duplicate of this bug. ***

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (new packages: emacs), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:2369