in with 1 comment

如题,记录一下在 macOS High Sierra 中编译代码找不到OpenSSL头文件的解决方案


在安装 Perl 模块 Crypt::OpenSSL::Bignum 的时候,一直在报错,日志如下:

cc -c   -arch x86_64 -arch i386 -g -pipe -fno-common -DPERL_DARWIN -fno-strict-aliasing -fstack-protector -Os   -DVERSION=\"0.09\" -DXS_VERSION=\"0.09\"  "-I/System/Library/Perl/5.18/darwin-thread-multi-2level/CORE"  -DPERL5 -DOPENSSL_NO_KRB5 Bignum.c
Bignum.xs:5:10: fatal error: 'openssl/err.h' file not found
#include <openssl/err.h>
1 error generated.
make: *** [Bignum.o] Error 1
-> FAIL Installing Crypt::OpenSSL::Bignum failed. See /Volumes/Akvo/.cpanm/work/1530693447.26452/build.log for details. Retry with --force to force install it.
-> FAIL Installing the dependencies failed: Module 'Crypt::OpenSSL::Bignum' is not installed
-> FAIL Bailing out the installation for Webqq-Encryption-1.7.

显而易见,是没有找到 OpenSSL 的头文件导致。


虽然 MacOS 已经自带了 OpenSSL ,但是我们依旧需要执行以下代码以安装新版。

brew install openssl


A CA file has been bootstrapped using certificates from the SystemRoots
keychain. To add additional certificates (e.g. the certificates added in
the System keychain), place .pem files in

and run

This formula is keg-only, which means it was not symlinked into /usr/local,
because Apple has deprecated use of OpenSSL in favor of its own TLS and crypto libraries.

If you need to have this software first in your PATH run:
  echo 'export PATH="/usr/local/opt/openssl/bin:$PATH"' >> ~/.zshrc

For compilers to find this software you may need to set:
    LDFLAGS:  -L/usr/local/opt/openssl/lib
    CPPFLAGS: -I/usr/local/opt/openssl/include

意思就是,这个自行安装的新版并不会覆盖掉系统自带的版本。如果你希望你的程序优先调用这个版本,需要自行将之链接到环境变量;如果需要使用此版本编译软件,则需要自行在 Makefile 中设置 LDFLAGS 与 CPPFLAGS 。

brew link openssl --force

但是经过测试后发现 brew 拒绝链接,提示如下:

Warning: Refusing to link: openssl
Linking keg-only openssl means you may end up linking against the insecure,
deprecated system OpenSSL while using the headers from Homebrew's openssl.
Instead, pass the full include/library paths to your compiler e.g.:
  -I/usr/local/opt/openssl/include -L/usr/local/opt/openssl/lib

通过 brew 安装的 OpenSSL 的头文件位于 /usr/local/Cellar/openssl/版本号/include/openssl 文件夹内,以我的版本为例,即 /usr/local/Cellar/openssl/1.0.2o_2/include/openssl ,在终端内执行下列代码:

ln -s /usr/local/Cellar/openssl/1.0.2o_2/include/openssl /usr/local/include


cpanm Crypt::OpenSSL::Bignum


Responses / Cancel Reply
  1. 谢谢分享,找了好久才找到解决办法