[BUILD] Fix opentracing-shim when added in super project #2356
+7
−4
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Fixes #2355
Changes
Change the opentracing-shim include paths to be relative to opentelemetry-cpp directory, rather than the root cmake project directory. Those two directories will be different if opentelemetry-cpp is added to a larger project.
I also switched
include_directories
totarget_include_directories
as my understanding is that the latter is current best-practice. This necessitated gating the includes with a BUILD_INTERFACE generator expression. However, I don't think this change is required for this fix. I just wanted to improve it a little bit.