MacOS(Brew环境)运行davtest.pl遇Net::SSL缺失及安装失败求助

问题描述 #

在带Brew的MacOS系统中运行davtest.pl时，出现Perl模块缺失错误：

Can't locate Net/SSL.pm in @INC (you may need to install the Net::SSL module) (@INC contains: /Library/Perl/5.30/darwin-thread-multi-2level /Library/Perl/5.30 /Network/Library/Perl/5.30/darwin-thread-multi-2level /Network/Library/Perl/5.30 /Library/Perl/Updates/5.30.3/darwin-thread-multi-2level /Library/Perl/Updates/5.30.3 /System/Library/Perl/5.30/darwin-thread-multi-2level /System/Library/Perl/5.30 /System/Library/Perl/Extras/5.30/darwin-thread-multi-2level /System/Library/Perl/Extras/5.30) at davtest.pl line 49. BEGIN failed--compilation aborted at davtest.pl line 49.

尝试用cpan安装Net::SSL模块时，又触发OpenSSL头文件找不到的错误：

openssl-version.c:2:10: fatal error: 'openssl/opensslv.h' file not found #include <openssl/opensslv.h> ^~~~~~~~~~~~~~~~~~~~ 1 error generated. Failed to build and link a simple executable using OpenSSL No 'Makefile' created NANIS/Crypt-SSLeay-0.72.tar.gz /usr/bin/perl Makefile.PL -- NOT OK

解决方案 #

1. 用Brew安装最新版OpenSSL #

系统自带的OpenSSL路径无法被Perl的模块构建工具识别，先通过Brew安装：

brew install openssl

2. 指定OpenSSL路径安装依赖模块 #

Net::SSL依赖Crypt::SSLeay，需要让cpan找到Brew安装的OpenSSL的头文件和库：

• 先获取Brew安装的OpenSSL路径：

  brew --prefix openssl
  

  M系列芯片Mac输出通常是/opt/homebrew/opt/openssl，Intel芯片是/usr/local/opt/openssl

• 设置环境变量后安装Crypt::SSLeay：

  export OPENSSL_PREFIX=$(brew --prefix openssl)
  export CFLAGS="-I$OPENSSL_PREFIX/include"
  export LDFLAGS="-L$OPENSSL_PREFIX/lib"
  cpan Crypt::SSLeay
  

• 或者用更简洁的cpanm（未安装的话先执行brew install cpanm）：

  OPENSSL_PREFIX=$(brew --prefix openssl) cpanm Crypt::SSLeay
  

3. 验证安装 #

安装完成后，重新运行davtest.pl即可解决模块缺失问题。

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