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function(target_create _target _lib)
add_library(${_target} STATIC IMPORTED)
set_target_properties(
${_target} PROPERTIES IMPORTED_LOCATION
"${opentelemetry_BINARY_DIR}/${_lib}")
endfunction()
function(build_opentelemetry)
set(opentelemetry_SOURCE_DIR "${PROJECT_SOURCE_DIR}/src/jaegertracing/opentelemetry-cpp")
set(opentelemetry_BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}/opentelemetry-cpp")
set(opentelemetry_cpp_targets opentelemetry_trace opentelemetry_exporter_jaeger_trace)
set(opentelemetry_CMAKE_ARGS -DCMAKE_POSITION_INDEPENDENT_CODE=ON
-DWITH_JAEGER=ON
-DBUILD_TESTING=OFF
-DCMAKE_BUILD_TYPE=Release
-DWITH_EXAMPLES=OFF)
set(opentelemetry_libs
${opentelemetry_BINARY_DIR}/sdk/src/trace/libopentelemetry_trace.a
${opentelemetry_BINARY_DIR}/sdk/src/resource/libopentelemetry_resources.a
${opentelemetry_BINARY_DIR}/sdk/src/common/libopentelemetry_common.a
${opentelemetry_BINARY_DIR}/exporters/jaeger/libopentelemetry_exporter_jaeger_trace.a
${opentelemetry_BINARY_DIR}/ext/src/http/client/curl/libopentelemetry_http_client_curl.a
${CURL_LIBRARIES}
)
set(opentelemetry_include_dir ${opentelemetry_SOURCE_DIR}/api/include/
${opentelemetry_SOURCE_DIR}/exporters/jaeger/include/
${opentelemetry_SOURCE_DIR}/ext/include/
${opentelemetry_SOURCE_DIR}/sdk/include/)
# TODO: add target based propogation
set(opentelemetry_deps opentelemetry_trace opentelemetry_resources opentelemetry_common
opentelemetry_exporter_jaeger_trace http_client_curl
${CURL_LIBRARIES})
if(CMAKE_MAKE_PROGRAM MATCHES "make")
# try to inherit command line arguments passed by parent "make" job
set(make_cmd $(MAKE) ${opentelemetry_cpp_targets})
else()
set(make_cmd ${CMAKE_COMMAND} --build <BINARY_DIR> --target
${opentelemetry_cpp_targets})
endif()
if(WITH_SYSTEM_BOOST)
list(APPEND opentelemetry_CMAKE_ARGS -DBOOST_ROOT=${BOOST_ROOT})
else()
list(APPEND dependencies Boost)
list(APPEND opentelemetry_CMAKE_ARGS -DBoost_INCLUDE_DIR=${CMAKE_BINARY_DIR}/boost/include)
endif()
include(ExternalProject)
ExternalProject_Add(opentelemetry-cpp
SOURCE_DIR ${opentelemetry_SOURCE_DIR}
PREFIX "opentelemetry-cpp"
CMAKE_ARGS ${opentelemetry_CMAKE_ARGS}
BUILD_COMMAND ${make_cmd}
BINARY_DIR ${opentelemetry_BINARY_DIR}
INSTALL_COMMAND ""
BUILD_BYPRODUCTS ${opentelemetry_libs}
DEPENDS ${dependencies}
LOG_BUILD ON)
# CMake doesn't allow to add a list of libraries to the import property, hence
# we create individual targets and link their libraries which finally
# interfaces to opentelemetry target
target_create("opentelemetry_trace" "sdk/src/trace/libopentelemetry_trace.a")
target_create("opentelemetry_resources"
"sdk/src/resource/libopentelemetry_resources.a")
target_create("opentelemetry_common"
"sdk/src/common/libopentelemetry_common.a")
target_create("opentelemetry_exporter_jaeger_trace"
"exporters/jaeger/libopentelemetry_exporter_jaeger_trace.a")
target_create("http_client_curl"
"ext/src/http/client/curl/libopentelemetry_http_client_curl.a")
# will do all linking and path setting fake include path for
# interface_include_directories since this happens at build time
file(MAKE_DIRECTORY ${opentelemetry_include_dir})
add_library(opentelemetry::libopentelemetry INTERFACE IMPORTED)
add_dependencies(opentelemetry::libopentelemetry opentelemetry-cpp)
set_target_properties(
opentelemetry::libopentelemetry
PROPERTIES
INTERFACE_LINK_LIBRARIES "${opentelemetry_deps}"
INTERFACE_INCLUDE_DIRECTORIES "${opentelemetry_include_dir}")
endfunction()
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