Created attachment 195755 [details]
Proposed patch (since 473539 revision)

Hello.

I noticed, that some ports, which have USES+=perl5 (and USE_PERL5=build), started to report about non existing "<..>/work/stage/usr/local/lib/perl5/site_perl" directory, when using some "find" command.
For example, x11-servers/xorg-server port:
-8<--
# cd /usr/ports/x11-servers/xorg-server
# make stage
<..>
find: /usr/ports/x11-servers/xorg-server/work/stage/usr/local/lib/perl5/site_perl: No such file or directory
install  -s -m 0644 /usr/ports/x11-servers/xorg-server/work/xorg-server-1.18.4/hw/xfree86/dixmods/.libs/libglx.so  /usr/ports/x11-servers/xorg-server/work/stage/usr/local/lib/xorg/modules/extensions/.xorg/
<..>
# make clean
===>  Cleaning for xorg-server-1.18.4_9,1
-->8-

ftp/wget port:
-8<--
# cd /usr/ports/ftp/wget
# make stage
<..>
Making install in testenv
find: /usr/ports/wget/work/stage/usr/local/lib/perl5/site_perl: No such file or directory
====> Compressing man pages (compress-man)
<..>
# make clean
===>  Cleaning for wget-1.19.5
-->8-

I found, that this is because of ports r473539 changes, which added removal of README.pod files, if they exists in "${STAGEDIR}${PREFIX}/${SITE_PERL_REL}" directory.

I propose to add some check for "${STAGEDIR}${PREFIX}/${SITE_PERL_REL}" directory before find command usage for this directory:
-8<--
@[ -d "${STAGEDIR}${PREFIX}/${SITE_PERL_REL}" ] && \
	${FIND} ${STAGEDIR}${PREFIX}/${SITE_PERL_REL} -name README.pod -delete || :
-->8-

Similar to what was used for "${STAGEDIR}${SITE_MAN3}" directory:
https://svnweb.freebsd.org/ports/head/Mk/Uses/perl5.mk?view=markup&pathrev=473539#l306
-8<--
@[ -d "${STAGEDIR}${SITE_MAN3}" ] && \
	${FIND} ${STAGEDIR}${SITE_MAN3} -name '*::README.3' -delete || :
-->8-

How to check:
% [ -d "/usr/ports" ] && echo exists || echo not exists
exists
% find /usr/ports -maxdepth 1 -name Makefile
/usr/ports/Makefile
% cd /usr/ports && find * -maxdepth 0 -name Makefile
Makefile
% [ -d "/usr/ports/nonexistent" ] && echo exists || echo not exists
not exists
% find /usr/ports/nonexistent -maxdepth 1 -name Makefile
find: /usr/ports/nonexistent: No such file or directory
% [ -d "/usr/ports/nonexistent" ] && find /usr/ports/nonexistent -maxdepth 1 -name Makefile

Also possible to redirect message about non-existing directory to /dev/null:
% sh -c "find /usr/ports/nonexistent -maxdepth 1 -name Makefile 2>/dev/null"
% sh -c "cd /usr/ports/nonexistent 2>/dev/null && find * -maxdepth 0 -name Makefile"

CC: mat@