I built Emacs 27.2 on Solaris 10 sparc with Oracle Studio 12.6 and ran 
into several test failures.

Configuration was via the following, since libjpeg etc. are not available:

./configure MAKE=/usr/sfw/bin/gmake --with-jpeg=ifavailable 
--with-png=ifavailable --with-gif=ifavailable --with-tiff=ifavailable 
--with-gnutls=ifavailable

"make check" did not terminate. Its output is attached as 
"make-check-log.txt". As can be seen, the following tests failed:

lisp/cedet/semantic-utest-ia
lisp/comint-tests
lisp/net/nsm-tests
lisp/progmodes/xref-tests
lisp/so-long-tests/so-long-tests
lisp/vc/diff-mode-tests
src/emacs-module-tests (segmentation violation)
src/process-tests (appears to be looping; 3 CPU hours so far)

I'm attaching logfiles.tgz, a tarball of the failing tests' log files.