Newbie question: How to build shared libraries without modifying CMakeLists?

[yxiang92128]

Is there a way to build Shared libraries instead of the static libraries straight from the source?

thanks,

Yang

[Jinming-Hu]

I always have the same problem. I remember building dll worked some time ago, then some day it didn't work anymore. @RickWinter Can you have somebody take a look?

I tested again, now it works.

[Jinming-Hu]

Hi @yxiang92128 , I just tested on ubuntu 20. I built with command cmake .. -DCMAKE_BUILD_TYPE=Debug -DBUILD_SHARED_LIBS=ON. It works.

Can you share your env and the command you used?

[steve-madden]

When targeting windows, static linkage for opentelemetry-cpp is required as the sdk is header-only. See open-telemetry/opentelemetry-cpp#1105

This is enforced in the vcpkg port. (see https://github.com/microsoft/vcpkg/blob/master/ports/opentelemetry-cpp/portfile.cmake)

Attempting to build the default cmake target fails:

C:\Users\smadden\dev\Azure\azure-sdk-for-cpp\build❯ cmake ..
No transport adapter was selected, using WinHTTP as the default option for Windows.
-- Running vcpkg install
Error: opentelemetry-cpp:[email protected] is only supported on '!(windows & !static)'

-- Running vcpkg install - failed
CMake Error at build/_deps/vcpkg-src/scripts/buildsystems/vcpkg.cmake:850 (message):
  vcpkg install failed.  See logs for more information:
  C:\Users\smadden\dev\Azure\azure-sdk-for-cpp\build\vcpkg-manifest-install.log
Call Stack (most recent call first):
  C:/Program Files/CMake/share/cmake-3.20/Modules/CMakeDetermineSystem.cmake:123 (include)
  CMakeLists.txt:26 (project)

[Jinming-Hu]

@steve-madden Yes, I am aware of this problem. But @yxiang92128 is working on Linux, so I assume he's referring to a different problem.

@steve-madden Do you mind opening a separate issue to track the one caused by opentelemetry?

[yxiang92128]

cmake .. -DCMAKE_BUILD_TYPE=Debug -DBUILD_SHARED_LIBS=ON

@Jinming-Hu your sample command line worked!! I forgot to put a "D" in front of the BUILD_SHARED_LIBS. My misteake.
Thanks!