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Ruby users
27. Feb. 2023, 22:24 MEZ
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/ea0a112a0c6a0498629e778af7991c9b4e349565/ext/openssl/ossl.h
> (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")
$INCFLAGS += " -I#{source_dir}"See also:
https://github.com/groonga/mysql2-replication/blob/main/ext/mysql2-replication/extconf.rb#L46-L48Thanks,
--
kou
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Ruby users
27. Feb. 2023, 21:28 MEZ
On 2/27/23, Tiago Cardoso via ruby-talk <ruby-talk@ml.ruby-lang.org> wrote:
> Hi Mohit,
> ... I want to access the headers of openssl "the ruby library", or more specifically its C extension headers.So, you mean, e.g., these:
https://github.com/ruby/openssl/blob/master/ext/openssl/
https://github.com/ruby/openssl/blob/master/ext/openssl/ossl.hIt doesn't look like the extension installs those headers:
https://github.com/ruby/openssl/blob/master/ext/openssl/extconf.rbE.g., ruby/digest installs digest.h
https://github.com/ruby/digest/blob/master/ext/digest/extconf.rb$INSTALLFILES = {
"digest.h" => "$(HDRDIR)"
} if $extmk
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Ruby users
27. Feb. 2023, 20:34 MEZ
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,
TiagoMohit 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/ea0a112a0c6a0498629e778af7991c9b4e349565/ext/openssl/ossl.h (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.
Ruby users
27. Feb. 2023, 12:28 MEZ
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/ea0a112a0c6a0498629e778af7991c9b4e349565/ext/openssl/ossl.h (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
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