---
name: "Crypt::OpenSSL::Guess"
section: "3pm"
platform: "linux"
package: "perl-crypt-openssl-guess"
version: "0.15-7"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/Crypt::OpenSSL::Guess"
---

# Crypt::OpenSSL::Guess(3pm)

Guess OpenSSL include path

## NAME

Crypt::OpenSSL::Guess - Guess OpenSSL include path

## SYNOPSIS

```
    use ExtUtils::MakeMaker;
    use Crypt::OpenSSL::Guess;
    WriteMakefile(
        # ...
        LIBS => [openssl_lib_paths() . ' -lssl -lcrypto'],
        INC  => openssl_inc_paths(), # guess include path or get from $ENV{OPENSSL_PREFIX}
    );
```

## DESCRIPTION

Crypt::OpenSSL::Guess provides helpers to guess OpenSSL include path on any platforms.

Often macOS's homebrew OpenSSL cause a problem on installation due to include path is not added. Some CPAN module provides to modify include path with configure-args, but Carton or Module::CPANfile is not supported to pass configure-args to each modules. Crypt::OpenSSL::\* modules should use it on your Makefile.PL.

This module resolves the include path by Net::SSLeay's workaround. Original code is taken from `"inc/Module/Install/PRIVATE/Net/SSLeay.pm"` by Net::SSLeay.

## FUNCTIONS

- **openssl\_inc\_paths()**

  This functions returns include paths in the format passed to CC. If OpenSSL could not find, then empty string is returned.

  ```
      openssl_inc_paths(); # on macOS: "-I/usr/local/opt/openssl/include"
  ```

- **openssl\_lib\_paths()**

  This functions returns library paths in the format passed to CC. If OpenSSL could not find, then empty string is returned.

  ```
      openssl_lib_paths(); # on macOS: "-L/usr/local/opt/openssl/lib"
  ```

- find\_openssl\_prefix(\[$dir\])

  This function returns OpenSSL's prefix. If set `"OPENSSL_PREFIX"` environment variable, you can overwrite the return value.

  ```
      find_openssl_prefix(); # on macOS: "/usr/local/opt/openssl"
  ```

- find\_openssl\_exec($prefix)

  This functions returns OpenSSL's executable path.

  ```
      find_openssl_exec(); # on macOS: "/usr/local/opt/openssl/bin/openssl"
  ```

- ($major, $minor, $letter) = **openssl\_version()**

  This functions returns OpenSSL's version as major, minor, letter.

  ```
      openssl_version(); # ("1.0", "2", "n")
  ```

## SEE ALSO

Net::SSLeay

## LICENSE

Copyright (C) Takumi Akiyama.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

## AUTHOR

Takumi Akiyama \<t.akiym@gmail.com\>