[CMAKE] add generated protobuf headers to the opentelemetry_proto target #3400
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…t instead of using include_directories
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## main #3400 +/- ##
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lalitb
approved these changes
May 15, 2025
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opentelemetry-proto.cmakegenerates the protobuf headers for opentelemetry-proto and includes them withinclude_directories. To propagate the headers to targets linking toopentelemetry_proto(throughopentelemetry-cpp::otlp_recordable) these headers need to be included on the target.As is, using
FetchContent_MakeAvailable(opentelemetry-cpp)withopentelemetry-cpp-contribfails here:exporters/user_events/CMakeFiles/opentelemetry_exporter_user_events_metrics.dir/src/metrics_exporter.cc.o In file included from /workspaces/opentelemetry-cpp-contrib/exporters/user_events/include/opentelemetry/exporters/user_events/metrics/exporter.h:6, from /workspaces/opentelemetry-cpp-contrib/exporters/user_events/src/metrics_exporter.cc:4: /workspaces/opentelemetry-cpp/exporters/otlp/include/opentelemetry/exporters/otlp/otlp_metric_utils.h:14:10: fatal error: opentelemetry/proto/metrics/v1/metrics.pb.h: No such file or directory 14 | #include "opentelemetry/proto/metrics/v1/metrics.pb.h"Changes
include_directorieswithtarget_include_directoriesforGENERATED_PROTOBUF_PATHPlease provide a brief description of the changes here.
For significant contributions please make sure you have completed the following items:
CHANGELOG.mdupdated for non-trivial changes