使用 CPAN 安装 perl 开关失败

Question

我粘贴了下面的输出（最初发布到 http://pastebin.com/Sh7a8tHK）

cpan[1]> install Switch
Reading '/.cpan/Metadata'
Database was generated on Tue, 11 Dec 2012 05:55:05 GMT
Running install for module 'Switch'
Running make for R/RG/RGARCIA/Switch-2.16.tar.gz
Checksum for /.cpan/sources/authors/id/R/RG/RGARCIA/Switch-2.16.tar.gz ok
Scanning cache /.cpan/build for sizes
............................................................................DONE
CPAN.pm: Building R/RG/RGARCIA/Switch-2.16.tar.gz
Checking if your kit is complete...
Looks good
Writing Makefile for Switch
Writing MYMETA.yml and MYMETA.json
cp Switch.pm blib/lib/Switch.pm
Manifying blib/man3/Switch.3
RGARCIA/Switch-2.16.tar.gz
/usr/ccs/bin/make -- OK
Running make test
PERL_DL_NONLAZY=1 /opt/perl/bin/perl "-MExtUtils::Command::MM" "-e" "test_harness(0, 'blib/lib', 'blib/arch')" t/*.t
t/given.t ... Useless use of numeric gt (>) in void context at t/given.t line 19.
t/given.t ... Failed 2/293 subtests
t/nested.t .. ok
t/switch.t .. ok
Test Summary Report
-------------------
t/given.t (Wstat: 0 Tests: 293 Failed: 2)
Failed tests:  2-3
Files=3, Tests=590,  1 wallclock secs ( 0.07 usr  0.01 sys +  0.47 cusr  0.00 csys =  0.55 CPU)
Result: FAIL
Failed 1/3 test programs. 2/590 subtests failed.
*** Error code 255
make: Fatal error: Command failed for target `test_dynamic'
RGARCIA/Switch-2.16.tar.gz
/usr/ccs/bin/make test -- NOT OK
//hint// to see the cpan-testers results for installing this module, try:
reports RGARCIA/Switch-2.16.tar.gz
Running make install
make test had returned bad status, won't install without force
Failed during this command:
RGARCIA/Switch-2.16.tar.gz                   : make_test NO
cpan[2]>

该模块似乎存在问题，如"无用地使用数字 gt....."所证明的那样，但是我使用 CPAN 在另一台机器上很好地安装了这个模块。 这是CPAN在安装时唯一抱怨的模块。

我使用的是最新版本的perl 5.16：

This is perl 5, version 16, subversion 2 (v5.16.2) built for i86pc-solaris

如何安装此模块？

注意：请不要告诉我交换机已弃用。 我明白这一点。

Answer 1

尝试这样做：

use feature qw/switch/;

看

perldoc -q switch

Answer 2

如果您可以使用 Perl v5.10 或更高版本，请参阅有效的 Perler 文章 Use for（） 而不是 given（）。

Answer 3

补丁：

--- Switch-2.16-wjgfvU/Switch.pm 2009-10-23 00:52:51.000000000 -0700

+++ Switch-2.16-wjgfvUcopy/Switch.pm 2010-08-15 17:41:38.000000000 -0700

@@ -146,7 +146,7 @@ sub filter_blocks
die "Bad $keyword statement (problem in the code block?) near $Switch::file line ", line(substr($source,0, pos $source), $line), "n";
        };
my $code = filter_blocks(substr($source,$pos[0],$pos[4]-$pos[0]),line(substr($source,0,$pos[0]),$line));
-           $code =~ s/{/{ local $::_S_W_I_T_C_H; Switch::switch $arg;/;
+           $code =~ s/{/{ local $::_S_W_I_T_C_H; Switch::switch($arg);/;
            $text .= $code . 'continue {last}';
            next component;
        }