$ ps -ef | grep -i httpd
    0   845     1   0 10:00AM ??         0:00.14 /usr/sbin/httpd -D FOREGROUND
   70   857   845   0 10:00AM ??         0:00.01 /usr/sbin/httpd -D FOREGROUND
  501   865   434   0 10:02AM ttys000    0:00.00 grep -i httpd

##</code><code>##

#!/usr/bin/perl          -> working
#!/usr/local/bin/perl -> NOT working

ls -l /usr/local/bin/perl 
lrwxr-xr-x  1 mstep  admin  55 Feb 24 07:12 /usr/local/bin/perl@ -> /Users/mstep/perl5/perlbrew/perls/perl-5.25.10/bin/perl

##</code><code>##

[Sun Mar 05 10:00:35.350898 2017] [cgi:error] [pid 857] [client ::1:49249] AH01215: BEGIN failed--compilation aborted at /Library/WebServer/CGI-Executables/todo04.pl line 28.: /Library/WebServer/CGI-Executables/todo04.pl
[Sun Mar 05 10:00:35.350982 2017] [cgi:error] [pid 857] [client ::1:49249] End of script output before headers: todo04.pl