WSL2中通过cpan安装Perl::LanguageServer失败求助

尝试给VS Code安装Perl::LanguageServer，执行命令：

sudo cpan install Perl::LanguageServer

出现错误，日志提示当前Perl版本不适配IO::AIO，但不确定降级Perl会不会破坏其他程序。关键错误片段：

checking for gcc... x86_64-linux-gnu-gcc
checking whether the C compiler works... no  <-- 我之前成功编译过C代码生成可执行文件
Warning: No success on command[/usr/bin/perl Makefile.PL INSTALLDIRS=site]

完整日志：

Continue anyways?  [y] y
checking for gcc... x86_64-linux-gnu-gcc
checking whether the C compiler works... no
Warning: No success on command[/usr/bin/perl Makefile.PL INSTALLDIRS=site]
  MLEHMANN/IO-AIO-4.8.tar.gz
  /usr/bin/perl Makefile.PL INSTALLDIRS=site -- NOT OK
  MLEHMANN/AnyEvent-AIO-1.1.tar.gz
  Has already been unwrapped into directory /root/.local/share/.cpan/build/AnyEvent-AIO-1.1-2
  MLEHMANN/AnyEvent-AIO-1.1.tar.gz
  Has already been prepared
Running make for M/ML/MLEHMANN/AnyEvent-AIO-1.1.tar.gz
The content of '/root/.local/share/.cpan/build/AnyEvent-AIO-1.1-2/META.yml' is not a HASH reference. Cannot use it.
Warning: Prerequisite 'IO::AIO => 3' for 'MLEHMANN/AnyEvent-AIO-1.1.tar.gz' failed when processing 'MLEHMANN/IO-AIO-4.8.tar.gz' with 'writemakefile => NO '/usr/bin/perl Makefile.PL INSTALLDIRS=site' returned status 19712'. Continuing, but chances to succeed are limited.
cp AIO.pm blib/lib/AnyEvent/AIO.pm
Manifying 1 pod document
  MLEHMANN/AnyEvent-AIO-1.1.tar.gz
  /usr/bin/make -- OK
Running make test for MLEHMANN/AnyEvent-AIO-1.1.tar.gz
PERL_DL_NONLAZY=1 "/usr/bin/perl" "-MExtUtils::Command::MM" "-MTest::Harness" "-e" "undef *Test::Harness::Switches; test_harness(0, 'blib/lib', 'blib/arch')" t/*.t
t/00_load.t .. 
Dubious, test returned 2 (wstat 512, 0x200)
Failed 1/1 subtests

解决办法 #

1. 绝对不要降级系统Perl #

系统自带Perl绑定了大量系统工具，降级必然破坏依赖，优先用隔离环境解决：

• 用perlbrew安装独立Perl版本：

  curl -L https://install.perlbrew.pl | bash
  source ~/perl5/perlbrew/etc/bashrc
  perlbrew install perl-5.36.0  # 选择IO::AIO兼容的版本，比如5.36
  perlbrew switch perl-5.36.0
  # 无需sudo，直接安装目标模块
  cpan install Perl::LanguageServer
  

  该方式完全隔离系统Perl，所有模块都安装在独立环境中，不影响系统工具。

2. 排查并修复IO::AIO编译问题 #

如果不想更换Perl版本，先定位编译失败原因：

• 验证gcc可用性：执行gcc --version和echo 'int main(){}' | gcc -o test test.c && ./test，确认编译链正常。
• 安装IO::AIO依赖库：Debian/Ubuntu系统执行sudo apt-get install libaio-dev，RedHat/CentOS执行sudo yum install libaio-devel。
• 尝试安装兼容版本的IO::AIO：比如cpan install MLEHMANN/IO-AIO-4.7.tar.gz。

3. 用cpanm替代原生cpan #

cpanm错误提示更清晰，依赖处理更高效，先安装：

# Debian/Ubuntu直接安装
sudo apt-get install cpanminus
# 或通过perl脚本安装
curl -L https://cpanmin.us | perl - --sudo App::cpanminus

然后执行：

cpanm Perl::LanguageServer

内容的提问来源于stack exchange，提问作者darkfrobozz