In How to make a CPAN module Ditribution I noted that there are issues with ^M ie the CR part or CRLF that you get for a line ending on Win32 when you move such a script to Linux. A monk just noted that he was less than convinced. I was thinking scripts (rather than Modules but you always have test scripts in a distro). Here is the evidence relating to the problem I get: 

[root@devel3 root]# cat bad.pl
#!/usr/bin/perl
print "Hello Errors!\n"

[root@devel3 root]# perl -pe 's/\015/^M/' bad.pl
#!/usr/bin/perl^M
print "Hello Errors!\n"^M

[root@devel3 root]# ./bad.pl
: bad interpreter: No such file or directory

[root@devel3 root]# perl -pi -e 's/\015//' bad.pl
[root@devel3 root]# ./bad.pl
Hello Errors!

[root@devel3 root]# perl -pe 's/\015/^M/' bad.pl
#!/usr/bin/perl
print "Hello Errors!"

[root@devel3 root]#

[download]

So you can see that the \015 is present and causes the breakage shown which goes away when you make the \015s go away. Q: Why is it so?

cheers

tachyon

In reply to Why does Perl choke on \015 ^M chars by tachyon

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