loading "libpcsclite_real.so.1" failed: Dynamic loading not supported

[areqq]

Platform

• Alpine Linux v3.21 x86_64
• pcsc-lite-2.2.3 ccid-1.5.5

Issue

I'm trying to build the application statically. Build wuth PCSC_LIB=/usr/lib/libpcsclite.a, the resulting binary doesn't contain any dynamic references. However, when I run it I get an error:
loading "libpcsclite_real.so.1" failed: Dynamic loading not supported
I tried linking libpcsclite_real.a, but it doesn't help.

How can I build the application full statically without reference to libpcsclite_real.so.1 ?

I think the problem is with versions newer than 2.0.3.

[LudovicRousseau]

Interesting question.
libpcsclite is not designed to be used statically.

How have you generated /usr/lib/libpcsclite.a?

[areqq]

I use Alpine Linux - their package pcsc-lite-static provides /usr/lib/libpcsclite.a
build log:
https://build.alpinelinux.org/buildlogs/build-edge-x86/main/pcsc-lite/pcsc-lite-2.3.0-r0.log
https://pkgs.alpinelinux.org/package/edge/main/x86/pcsc-lite

Up until version 2.0.3 I was using libpcsclite statically linking without any problems. I would appreciate any help in finding a solution for current and future versions.

[LudovicRousseau]

The Alpine build log does not contain the line used to configure & build pcsc-lite :-(
It looks like the argument -D default_library=both is used.
In this case I see both libpcsclite.so.1 and libpcsclite.a are generated.

But since pcsc-lite 2.1.0 a new mechanism has been added. See https://blog.apdu.fr/posts/2024/04/how-to-use-libpcsclite_delegate/
I would have to remove support of LIBPCSCLITE_DELEGATE and make other changes to get a working static library.

Why do you want to statically link with libpcsclite?

[areqq]

Thank you for your interest. I want to get the smallest possible binary that will work on virtually any x86_64 linux distribution without any dependences, that's why I build it staticly on alpine linux which has small libc musl, thanks to which the resulting binary is small and universal.

[LudovicRousseau]

I pushed some patches ed790dc to allow the build of libpcsclite as a static library.

Alpine Linux will have to specifically configure pcsc-lite with -Ddefault_library=static to generate the static version. It is not possible to generate both static and shared versions at the same time.
Someone will have to modify https://gitlab.alpinelinux.org/alpine/aports/-/blob/master/main/pcsc-lite/APKBUILD to add this support.

[areqq]

Thanks! Are you planning to release a new version soon? If yes, I’ll reach out to the Alpine package maintainer to request an update.

[LudovicRousseau]

Yes, "soon".

[LudovicRousseau]

New release available: https://blog.apdu.fr/posts/2024/12/new-version-of-pcsc-lite-231/

I changed my patch . The static library is now built by default. No need to use a special configuration argument.
It should be easy for the Alpine maintainer.

[LudovicRousseau]

See also https://blog.apdu.fr/posts/2024/12/static-library-libpcsclitea/

[areqq]

Thanks a lot for your quick response and solving my problem—really impressed!

By the way, I have a another question about static builds: is there a way to build a static pcscd + ccid that doesn’t require libccid.so?

[LudovicRousseau]

Please open a new issue for that.

[LudovicRousseau]

See #217 for the static pcscd + ccid issue.