[ruby-talk:444148] How to load ruby-openssl headers in a C extension
Hi, I'm writing a C extension which interfaces with ruby-openssl objects, and the openssl API. In the process, I'm needing access to some functions which ruby-openssl declares in the header file: https://github.com/ruby/openssl/blob/ea0a112a0c6a0498629e778af7991c9b4e34956... (example: ossl_raise). However, it's not clear to me how should I declare the #include in order to access it, for a header file coming from stdlib. Seems that ruby itself correctly places its header files (examples: ruby.h, or ruby/io.h), but I don't see the openssl gem ones. The beginning of my C file looks like: ```C #include <ruby.h> #include <openssl/evp.h> #include <pathto/openssl/ossl.h> // how to do this? ``` Thx, Tiago
Hi Tiago, On 2023-2-27 7:27 pm, Tiago Cardoso via ruby-talk wrote:
I'm writing a C extension which interfaces with ruby-openssl objects, and the openssl API. In the process, I'm needing access to some functions which ruby-openssl declares in the header file: https://github.com/ruby/openssl/blob/ea0a112a0c6a0498629e778af7991c9b4e34956... (example: ossl_raise). However, it's not clear to me how should I declare the #include in order to access it, for a header file coming from stdlib. Seems that ruby itself correctly places its header files (examples: ruby.h, or ruby/io.h), but I don't see the openssl gem ones.
The beginning of my C file looks like:
```C #include <ruby.h> #include <openssl/evp.h>
#include <pathto/openssl/ossl.h> // how to do this? ```
What is the error that you are getting? I would have that it should just work with "#include <openssl/ossl.h>" on the idea that it's relative to the system include directory but I am still exploring how C native extensions work but I thought it should have worked since I see other gems (e.g., grpc) include other items like: #include <ruby/ruby.h> #include <sys/time.h> Best regards, Mohit.
Hi Mohit, Thx for the reply. "#include <openssl/ossl.h>" is to access headers from openssl "the library", whereas I want to access the headers of openssl "the ruby library", or more specifically its C extension headers. Both "#include <ruby/ruby.h>" and "#include <sys/time.h>" do not apply to my use-case: the first is a header file from the ruby distribution, not an stdlib, whereas the latter is a (non-ruby related) system library. Best regards, Tiago Mohit Sindhwani <mo_mail@onghu.com> escreveu no dia segunda, 27/02/2023 à(s) 16:35:
Hi Tiago,
On 2023-2-27 7:27 pm, Tiago Cardoso via ruby-talk wrote:
I'm writing a C extension which interfaces with ruby-openssl objects, and the openssl API. In the process, I'm needing access to some functions which ruby-openssl declares in the header file: https://github.com/ruby/openssl/blob/ea0a112a0c6a0498629e778af7991c9b4e34956... (example: ossl_raise). However, it's not clear to me how should I declare the #include in order to access it, for a header file coming from stdlib. Seems that ruby itself correctly places its header files (examples: ruby.h, or ruby/io.h), but I don't see the openssl gem ones.
The beginning of my C file looks like:
```C #include <ruby.h> #include <openssl/evp.h>
#include <pathto/openssl/ossl.h> // how to do this? ```
What is the error that you are getting? I would have that it should just work with "#include <openssl/ossl.h>" on the idea that it's relative to the system include directory but I am still exploring how C native extensions work but I thought it should have worked since I see other gems (e.g., grpc) include other items like:
#include <ruby/ruby.h> #include <sys/time.h>
Best regards, Mohit.
On 2/27/23, Tiago Cardoso via ruby-talk <ruby-talk@ml.ruby-lang.org> wrote:
Hi Mohit, ... I want to access the headers of openssl "the ruby library", or more specifically its C extension headers.
So, you mean, e.g., these: https://github.com/ruby/openssl/blob/master/ext/openssl/ https://github.com/ruby/openssl/blob/master/ext/openssl/ossl.h It doesn't look like the extension installs those headers: https://github.com/ruby/openssl/blob/master/ext/openssl/extconf.rb E.g., ruby/digest installs digest.h https://github.com/ruby/digest/blob/master/ext/digest/extconf.rb $INSTALLFILES = { "digest.h" => "$(HDRDIR)" } if $extmk
Hi, In <CAD489_xmJUsZkPzzbhJPXi3naKn18fpt+Dj1_uVYf945p9FeZA@mail.gmail.com> "[ruby-talk:444148] How to load ruby-openssl headers in a C extension" on Mon, 27 Feb 2023 11:27:52 +0000, Tiago Cardoso via ruby-talk <ruby-talk@ml.ruby-lang.org> wrote:
I'm writing a C extension which interfaces with ruby-openssl objects, and the openssl API. In the process, I'm needing access to some functions which ruby-openssl declares in the header file: https://github.com/ruby/openssl/blob/ea0a112a0c6a0498629e778af7991c9b4e34956... (example: ossl_raise). However, it's not clear to me how should I declare the #include in order to access it, for a header file coming from stdlib. Seems that ruby itself correctly places its header files (examples: ruby.h, or ruby/io.h), but I don't see the openssl gem ones.
You can use Gem::Specification for it in your extconf.rb: spec = Gem::Specification.find_by_name("openssl") source_dir = File.join(spec.full_gem_path, "ext", "openssl") $INCFLAGS += " -I#{source_dir}" See also: https://github.com/groonga/mysql2-replication/blob/main/ext/mysql2-replicati... Thanks, -- kou
participants (4)
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Frank J. Cameron -
Mohit Sindhwani -
Sutou Kouhei -
Tiago Cardoso