=> "/opt/local/bin/bmake" ["-C", "/data/jenkins/workspace/pkgsrc-trunk-x86_64/textproc/flycheck-mode", "all", "BATCH=1", "DEPENDS_TARGET=/nonexistent"]
===> Building for flycheck-mode-33.0
cd /tmp/work/textproc/flycheck-mode/work/flycheck-33.0 &&  /opt/local/bin/emacs --no-init-file --no-site-file -L . -batch  -f batch-byte-compile /tmp/work/textproc/flycheck-mode/work/flycheck-33.0/flycheck-ert.el

In flycheck-ert-should-errors:
flycheck-ert.el:402:6: Warning: value from call to `cl-mapcar' is unused
cd /tmp/work/textproc/flycheck-mode/work/flycheck-33.0 &&  /opt/local/bin/emacs --no-init-file --no-site-file -L . -batch  -f batch-byte-compile /tmp/work/textproc/flycheck-mode/work/flycheck-33.0/flycheck.el

In flycheck-rx-to-string:
flycheck.el:1572:11: Warning: `rx-constituents' is an obsolete variable (as of 30.1); use `rx-let', `rx-let-eval', or `rx-define' instead.
flycheck.el:1563:10: Warning: `rx-constituents' is an obsolete variable (as of 30.1); use `rx-let', `rx-let-eval', or `rx-define' instead.
flycheck.el:10091:11: Warning: in defcustom for `flycheck-perl-module-list': `repeat' without type specs

In end of data:
flycheck.el:3835:21: Warning: the function `flycheck--format-message' is not known to be defined.