【发布时间】：2014-02-01 05:17:23
【问题描述】：
我是新手，学习 Perl 编程。我对 cpan 感到困惑，我知道有上千个库支持 perl，但是，如何从 cpan 安装库？我在linux中使用cpan，当我尝试安装switch时，我有错误消息
cpan[1]> install Switch
安装时出错：
Reading '/root/.cpan/Metadata'
Database was generated on Mon, 13 Jan 2014 08:29:02 GMT
Running install for module 'Switch'
Running make for R/RG/RGARCIA/Switch-2.16.tar.gz
Checksum for /root/.cpan/sources/authors/id/R/RG/RGARCIA/Switch-2.16.tar.gz ok
Scanning cache /root/.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/bin/make -- OK
'YAML' not installed, will not store persistent state
Running make test
PERL_DL_NONLAZY=1 /usr/bin/perl5.18.1 "-MExtUtils::Command::MM" "-e" "test_harness(0, 'blib/lib', 'blib/arch')" t/*.t
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, 4 wallclock secs ( 0.31 usr 0.01 sys + 2.38 cusr 0.03 csys = 2.73 CPU)
Result: FAIL
Failed 1/3 test programs. 2/590 subtests failed.
make: *** [test_dynamic] Error 255
RGARCIA/Switch-2.16.tar.gz
/usr/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
如何安装开关？ 谢谢
【问题讨论】：
-
两个子测试失败。无论如何，不推荐
Switch作为源过滤器。如果可以避免，请使用Switch::Plain。use feature 'switch'在 5.18 中被标记为实验性的。