[BUILD] DLL export interface for Metrics

ci/do_ci.ps1

@@ -58,7 +58,7 @@ switch ($action) {
     cmake $SRC_DIR `
       -DVCPKG_TARGET_TRIPLET=x64-windows `
       -DOPENTELEMETRY_BUILD_DLL=1 `
-      "-DCMAKE_TOOLCHAIN_FILE=$VCPKG_DIR/scripts/buildsystems/vcpkg.cmake"
+     "-DCMAKE_TOOLCHAIN_FILE=$VCPKG_DIR/scripts/buildsystems/vcpkg.cmake"
     $exit = $LASTEXITCODE
     if ($exit -ne 0) {
       exit $exit
@@ -79,6 +79,16 @@ switch ($action) {
     if ($exit -ne 0) {
       exit $exit
     }
+    examples\metrics_simple\Debug\metrics_ostream_example.exe
+    $exit = $LASTEXITCODE
+    if ($exit -ne 0) {
+      exit $exit
+    }
+    examples\logs_simple\Debug\example_logs_simple.exe
+    $exit = $LASTEXITCODE
+    if ($exit -ne 0) {
+      exit $exit
+    }
   }
   "cmake.maintainer.test" {
     cd "$BUILD_DIR"

examples/common/metrics_foo_library/CMakeLists.txt

@@ -1,6 +1,12 @@
 # Copyright The OpenTelemetry Authors
 # SPDX-License-Identifier: Apache-2.0
 
+if(DEFINED OPENTELEMETRY_BUILD_DLL)
+  add_definitions(-DOPENTELEMETRY_BUILD_IMPORT_DLL)
+endif()
+
 add_library(common_metrics_foo_library foo_library.h foo_library.cc)
 set_target_version(common_metrics_foo_library)
-target_link_libraries(common_metrics_foo_library PUBLIC opentelemetry_api)
+
+target_link_libraries(common_metrics_foo_library
+                      PUBLIC ${CMAKE_THREAD_LIBS_INIT} opentelemetry_api)

examples/metrics_simple/CMakeLists.txt

@@ -1,9 +1,20 @@
 # Copyright The OpenTelemetry Authors
 # SPDX-License-Identifier: Apache-2.0
 
+if(DEFINED OPENTELEMETRY_BUILD_DLL)
+  add_definitions(-DOPENTELEMETRY_BUILD_IMPORT_DLL)
+endif()
+
 include_directories(${CMAKE_SOURCE_DIR}/exporters/ostream/include)
+
 add_executable(metrics_ostream_example metrics_ostream.cc)
-target_link_libraries(
-  metrics_ostream_example ${CMAKE_THREAD_LIBS_INIT} opentelemetry_metrics
-  opentelemetry_exporter_ostream_metrics opentelemetry_resources
-  common_metrics_foo_library)
+target_link_libraries(metrics_ostream_example ${CMAKE_THREAD_LIBS_INIT}
+                      common_metrics_foo_library)
+
+if(DEFINED OPENTELEMETRY_BUILD_DLL)
+  target_link_libraries(metrics_ostream_example opentelemetry_cpp)
+else()
+  target_link_libraries(
+    metrics_ostream_example opentelemetry_metrics
+    opentelemetry_exporter_ostream_metrics opentelemetry_resources)
+endif()

examples/otlp/CMakeLists.txt

@@ -28,10 +28,15 @@ if(WITH_OTLP_GRPC)
 
   add_executable(example_otlp_grpc_metric grpc_metric_main.cc)
 
-  target_link_libraries(
-    example_otlp_grpc_metric ${CMAKE_THREAD_LIBS_INIT}
-    common_metrics_foo_library opentelemetry_metrics
-    opentelemetry_exporter_otlp_grpc_metrics)
+  target_link_libraries(example_otlp_grpc_metric ${CMAKE_THREAD_LIBS_INIT}
+                        common_metrics_foo_library)
+
+  if(DEFINED OPENTELEMETRY_BUILD_DLL)
+    target_link_libraries(example_otlp_grpc_metric opentelemetry_cpp)
+  else()
+    target_link_libraries(example_otlp_grpc_metric opentelemetry_metrics
+                          opentelemetry_exporter_otlp_grpc_metrics)
+  endif()
 
   # LOG
 
@@ -66,10 +71,17 @@ if(WITH_OTLP_HTTP)
   # METRIC
 
   add_executable(example_otlp_http_metric http_metric_main.cc)
-  target_link_libraries(
-    example_otlp_http_metric ${CMAKE_THREAD_LIBS_INIT}
-    common_metrics_foo_library opentelemetry_metrics
-    opentelemetry_exporter_otlp_http_metric)
+  target_link_libraries(example_otlp_http_metric ${CMAKE_THREAD_LIBS_INIT}
+                        common_metrics_foo_library)
+
+  if(DEFINED OPENTELEMETRY_BUILD_DLL)
+    target_link_libraries(example_otlp_http_metric opentelemetry_cpp
+                          opentelemetry_common)
+  else()
+    target_link_libraries(
+      example_otlp_http_metric common_metrics_foo_library opentelemetry_metrics
+      opentelemetry_exporter_otlp_http_metric)
+  endif()
 
   # LOG
 

exporters/otlp/include/opentelemetry/exporters/otlp/otlp_grpc_metric_exporter_factory.h

@@ -15,7 +15,7 @@ namespace otlp
 /**
  * Factory class for OtlpGrpcMetricExporter.
  */
-class OtlpGrpcMetricExporterFactory
+class OPENTELEMETRY_EXPORT OtlpGrpcMetricExporterFactory
 {
 public:
   /**

exporters/otlp/include/opentelemetry/exporters/otlp/otlp_http_metric_exporter_factory.h

@@ -17,7 +17,7 @@ namespace otlp
 /**
  * Factory class for OtlpHttpMetricExporter.
  */
-class OtlpHttpMetricExporterFactory
+class OPENTELEMETRY_EXPORT OtlpHttpMetricExporterFactory
 {
 public:
   /**

ext/src/dll/CMakeLists.txt

@@ -22,6 +22,20 @@ if(WITH_OTLP_HTTP)
                         PRIVATE opentelemetry_exporter_otlp_http)
 endif()
 
+target_link_libraries(
+  opentelemetry_cpp PRIVATE opentelemetry_metrics
+                            opentelemetry_exporter_ostream_metrics)
+
+if(WITH_OTLP_GRPC)
+  target_link_libraries(opentelemetry_cpp
+                        PRIVATE opentelemetry_exporter_otlp_grpc_metrics)
+endif()
+
+if(WITH_OTLP_HTTP)
+  target_link_libraries(opentelemetry_cpp
+                        PRIVATE opentelemetry_exporter_otlp_http_metric)
+endif()
+
 target_link_libraries(
   opentelemetry_cpp PRIVATE opentelemetry_logs
                             opentelemetry_exporter_ostream_logs)

ext/src/dll/opentelemetry_cpp.src

@@ -57,15 +57,48 @@ EXPORTS
     ?ForceFlush@TracerProvider@trace@sdk@v1@opentelemetry@@QEAA_NV?$duration@_JU?$ratio@$00$0PECEA@@std@@@chrono@std@@@Z
     ?ForceFlush@LoggerProvider@logs@sdk@v1@opentelemetry@@QEAA_NV?$duration@_JU?$ratio@$00$0PECEA@@std@@@chrono@std@@@Z
     ??0OStreamLogRecordExporter@logs@exporter@v1@opentelemetry@@QEAA@AEAV?$basic_ostream@DU?$char_traits@D@std@@@std@@@Z
+
+    // public: static class std::unique_ptr<class opentelemetry::v1::sdk::metrics::PushMetricExporter,struct std::default_delete<class opentelemetry::v1::sdk::metrics::PushMetricExporter> > __cdecl opentelemetry::v1::exporter::metrics::OStreamMetricExporterFactory::Create(void)
+    ?Create@OStreamMetricExporterFactory@metrics@exporter@v1@opentelemetry@@SA?AV?$unique_ptr@VPushMetricExporter@metrics@sdk@v1@opentelemetry@@U?$default_delete@VPushMetricExporter@metrics@sdk@v1@opentelemetry@@@std@@@std@@XZ
+    // public: static class std::unique_ptr<class opentelemetry::v1::sdk::metrics::MetricReader,struct std::default_delete<class opentelemetry::v1::sdk::metrics::MetricReader> > __cdecl opentelemetry::v1::sdk::metrics::PeriodicExportingMetricReaderFactory::Create(class std::unique_ptr<class opentelemetry::v1::sdk::metrics::PushMetricExporter,struct std::default_delete<class opentelemetry::v1::sdk::metrics::PushMetricExporter> >,struct opentelemetry::v1::sdk::metrics::PeriodicExportingMetricReaderOptions const & __ptr64)
+    ?Create@PeriodicExportingMetricReaderFactory@metrics@sdk@v1@opentelemetry@@SA?AV?$unique_ptr@VMetricReader@metrics@sdk@v1@opentelemetry@@U?$default_delete@VMetricReader@metrics@sdk@v1@opentelemetry@@@std@@@std@@V?$unique_ptr@VPushMetricExporter@metrics@sdk@v1@opentelemetry@@U?$default_delete@VPushMetricExporter@metrics@sdk@v1@opentelemetry@@@std@@@7@AEBUPeriodicExportingMetricReaderOptions@2345@@Z
+    // public: static class std::unique_ptr<class opentelemetry::v1::metrics::MeterProvider,struct std::default_delete<class opentelemetry::v1::metrics::MeterProvider> > __cdecl opentelemetry::v1::sdk::metrics::MeterProviderFactory::Create(void)
+    ?Create@MeterProviderFactory@metrics@sdk@v1@opentelemetry@@SA?AV?$unique_ptr@VMeterProvider@metrics@v1@opentelemetry@@U?$default_delete@VMeterProvider@metrics@v1@opentelemetry@@@std@@@std@@XZ
+    // public: static class std::unique_ptr<class opentelemetry::v1::sdk::metrics::MeterContext,struct std::default_delete<class opentelemetry::v1::sdk::metrics::MeterContext> > __cdecl opentelemetry::v1::sdk::metrics::MeterContextFactory::Create(void)
+    ?Create@MeterContextFactory@metrics@sdk@v1@opentelemetry@@SA?AV?$unique_ptr@VMeterContext@metrics@sdk@v1@opentelemetry@@U?$default_delete@VMeterContext@metrics@sdk@v1@opentelemetry@@@std@@@std@@XZ
+    // public: static class std::unique_ptr<class opentelemetry::v1::metrics::MeterProvider,struct std::default_delete<class opentelemetry::v1::metrics::MeterProvider> > __cdecl opentelemetry::v1::sdk::metrics::MeterProviderFactory::Create(class std::unique_ptr<class opentelemetry::v1::sdk::metrics::MeterContext,struct std::default_delete<class opentelemetry::v1::sdk::metrics::MeterContext> >)
+    ?Create@MeterProviderFactory@metrics@sdk@v1@opentelemetry@@SA?AV?$unique_ptr@VMeterProvider@metrics@v1@opentelemetry@@U?$default_delete@VMeterProvider@metrics@v1@opentelemetry@@@std@@@std@@V?$unique_ptr@VMeterContext@metrics@sdk@v1@opentelemetry@@U?$default_delete@VMeterContext@metrics@sdk@v1@opentelemetry@@@std@@@7@@Z
+    // public: static class std::unique_ptr<class opentelemetry::v1::sdk::metrics::View,struct std::default_delete<class opentelemetry::v1::sdk::metrics::View> > __cdecl opentelemetry::v1::sdk::metrics::ViewFactory::Create(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,enum opentelemetry::v1::sdk::metrics::AggregationType,class std::shared_ptr<class opentelemetry::v1::sdk::metrics::AggregationConfig>)
+    ?Create@ViewFactory@metrics@sdk@v1@opentelemetry@@SA?AV?$unique_ptr@VView@metrics@sdk@v1@opentelemetry@@U?$default_delete@VView@metrics@sdk@v1@opentelemetry@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@7@00W4AggregationType@2345@V?$shared_ptr@VAggregationConfig@metrics@sdk@v1@opentelemetry@@@7@@Z
+    // public: static class std::unique_ptr<class opentelemetry::v1::sdk::metrics::View,struct std::default_delete<class opentelemetry::v1::sdk::metrics::View> > __cdecl opentelemetry::v1::sdk::metrics::ViewFactory::Create(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,enum opentelemetry::v1::sdk::metrics::AggregationType)
+    ?Create@ViewFactory@metrics@sdk@v1@opentelemetry@@SA?AV?$unique_ptr@VView@metrics@sdk@v1@opentelemetry@@U?$default_delete@VView@metrics@sdk@v1@opentelemetry@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@7@00W4AggregationType@2345@@Z
+    // public: static class std::unique_ptr<class opentelemetry::v1::sdk::metrics::MeterSelector,struct std::default_delete<class opentelemetry::v1::sdk::metrics::MeterSelector> > __cdecl opentelemetry::v1::sdk::metrics::MeterSelectorFactory::Create(class opentelemetry::v1::nostd::string_view,class opentelemetry::v1::nostd::string_view,class opentelemetry::v1::nostd::string_view)
+    ?Create@MeterSelectorFactory@metrics@sdk@v1@opentelemetry@@SA?AV?$unique_ptr@VMeterSelector@metrics@sdk@v1@opentelemetry@@U?$default_delete@VMeterSelector@metrics@sdk@v1@opentelemetry@@@std@@@std@@Vstring_view@nostd@45@00@Z
+    // public: static class std::unique_ptr<class opentelemetry::v1::sdk::metrics::InstrumentSelector,struct std::default_delete<class opentelemetry::v1::sdk::metrics::InstrumentSelector> > __cdecl opentelemetry::v1::sdk::metrics::InstrumentSelectorFactory::Create(enum opentelemetry::v1::sdk::metrics::InstrumentType,class opentelemetry::v1::nostd::string_view,class opentelemetry::v1::nostd::string_view)
+    ?Create@InstrumentSelectorFactory@metrics@sdk@v1@opentelemetry@@SA?AV?$unique_ptr@VInstrumentSelector@metrics@sdk@v1@opentelemetry@@U?$default_delete@VInstrumentSelector@metrics@sdk@v1@opentelemetry@@@std@@@std@@W4InstrumentType@2345@Vstring_view@nostd@45@1@Z
+
+    // public: void __cdecl opentelemetry::v1::sdk::metrics::MeterContext::AddMetricReader(class std::shared_ptr<class opentelemetry::v1::sdk::metrics::MetricReader>)
+    ?AddMetricReader@MeterContext@metrics@sdk@v1@opentelemetry@@QEAAXV?$shared_ptr@VMetricReader@metrics@sdk@v1@opentelemetry@@@std@@@Z
+    // public: void __cdecl opentelemetry::v1::sdk::metrics::MeterProvider::AddMetricReader(class std::shared_ptr<class opentelemetry::v1::sdk::metrics::MetricReader>)
+    ?AddMetricReader@MeterProvider@metrics@sdk@v1@opentelemetry@@QEAAXV?$shared_ptr@VMetricReader@metrics@sdk@v1@opentelemetry@@@std@@@Z
+    // public: void __cdecl opentelemetry::v1::sdk::metrics::MeterProvider::AddView(class std::unique_ptr<class opentelemetry::v1::sdk::metrics::InstrumentSelector,struct std::default_delete<class opentelemetry::v1::sdk::metrics::InstrumentSelector> >,class std::unique_ptr<class opentelemetry::v1::sdk::metrics::MeterSelector,struct std::default_delete<class opentelemetry::v1::sdk::metrics::MeterSelector> >,class std::unique_ptr<class opentelemetry::v1::sdk::metrics::View,struct std::default_delete<class opentelemetry::v1::sdk::metrics::View> >)
+    ?AddView@MeterProvider@metrics@sdk@v1@opentelemetry@@QEAAXV?$unique_ptr@VInstrumentSelector@metrics@sdk@v1@opentelemetry@@U?$default_delete@VInstrumentSelector@metrics@sdk@v1@opentelemetry@@@std@@@std@@V?$unique_ptr@VMeterSelector@metrics@sdk@v1@opentelemetry@@U?$default_delete@VMeterSelector@metrics@sdk@v1@opentelemetry@@@std@@@7@V?$unique_ptr@VView@metrics@sdk@v1@opentelemetry@@U?$default_delete@VView@metrics@sdk@v1@opentelemetry@@@std@@@7@@Z
+
+
 #if defined(WITH_OTLP_GRPC) || defined(WITH_OTLP_HTTP)
     ?GetOtlpDefaultTracesTimeout@otlp@exporter@v1@opentelemetry@@YA?AV?$duration@_JU?$ratio@$00$0JIJGIA@@std@@@chrono@std@@XZ
     ?GetOtlpDefaultTracesHeaders@otlp@exporter@v1@opentelemetry@@YA?AV?$multimap@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V12@Ucmp_ic@otlp@exporter@v1@opentelemetry@@V?$allocator@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V12@@std@@@2@@std@@XZ
     ?GetOtlpDefaultLogsTimeout@otlp@exporter@v1@opentelemetry@@YA?AV?$duration@_JU?$ratio@$00$0JIJGIA@@std@@@chrono@std@@XZ
     ?GetOtlpDefaultLogsHeaders@otlp@exporter@v1@opentelemetry@@YA?AV?$multimap@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V12@Ucmp_ic@otlp@exporter@v1@opentelemetry@@V?$allocator@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V12@@std@@@2@@std@@XZ
+    ?GetOtlpDefaultMetricsTimeout@otlp@exporter@v1@opentelemetry@@YA?AV?$duration@_JU?$ratio@$00$0JIJGIA@@std@@@chrono@std@@XZ
+    ?GetOtlpDefaultMetricsHeaders@otlp@exporter@v1@opentelemetry@@YA?AV?$multimap@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V12@Ucmp_ic@otlp@exporter@v1@opentelemetry@@V?$allocator@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V12@@std@@@2@@std@@XZ
 #endif  // defined(WITH_OTLP_GRPC) || defined(WITH_OTLP_HTTP)
 #if defined(WITH_OTLP_GRPC)
     // public: static class std::unique_ptr<class opentelemetry::v1::sdk::logs::LogRecordExporter,struct std::default_delete<class opentelemetry::v1::sdk::logs::LogRecordExporter> > __cdecl opentelemetry::v1::exporter::otlp::OtlpGrpcLogRecordExporterFactory::Create(struct opentelemetry::v1::exporter::otlp::OtlpGrpcExporterOptions const & __ptr64)
     ?Create@OtlpGrpcLogRecordExporterFactory@otlp@exporter@v1@opentelemetry@@SA?AV?$unique_ptr@VLogRecordExporter@logs@sdk@v1@opentelemetry@@U?$default_delete@VLogRecordExporter@logs@sdk@v1@opentelemetry@@@std@@@std@@AEBUOtlpGrpcExporterOptions@2345@@Z
+    // public: static class std::unique_ptr<class opentelemetry::v1::sdk::metrics::PushMetricExporter,struct std::default_delete<class opentelemetry::v1::sdk::metrics::PushMetricExporter> > __cdecl opentelemetry::v1::exporter::otlp::OtlpGrpcMetricExporterFactory::Create(struct opentelemetry::v1::exporter::otlp::OtlpGrpcMetricExporterOptions const & __ptr64)
+    ?Create@OtlpGrpcMetricExporterFactory@otlp@exporter@v1@opentelemetry@@SA?AV?$unique_ptr@VPushMetricExporter@metrics@sdk@v1@opentelemetry@@U?$default_delete@VPushMetricExporter@metrics@sdk@v1@opentelemetry@@@std@@@std@@AEBUOtlpGrpcMetricExporterOptions@2345@@Z
+
     ?GetOtlpDefaultGrpcTracesEndpoint@otlp@exporter@v1@opentelemetry@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ
     ?GetOtlpDefaultGrpcTracesIsInsecure@otlp@exporter@v1@opentelemetry@@YA_NXZ
     ?GetOtlpDefaultTracesSslCertificatePath@otlp@exporter@v1@opentelemetry@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ
@@ -76,5 +109,9 @@ EXPORTS
     ?Create@OtlpHttpLogRecordExporterFactory@otlp@exporter@v1@opentelemetry@@SA?AV?$unique_ptr@VLogRecordExporter@logs@sdk@v1@opentelemetry@@U?$default_delete@VLogRecordExporter@logs@sdk@v1@opentelemetry@@@std@@@std@@AEBUOtlpHttpLogRecordExporterOptions@2345@@Z
     ?GetOtlpDefaultHttpTracesEndpoint@otlp@exporter@v1@opentelemetry@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ
     ?GetOtlpDefaultHttpLogsEndpoint@otlp@exporter@v1@opentelemetry@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ
+
+    // public: static class std::unique_ptr<class opentelemetry::v1::sdk::metrics::PushMetricExporter,struct std::default_delete<class opentelemetry::v1::sdk::metrics::PushMetricExporter> > __cdecl opentelemetry::v1::exporter::otlp::OtlpHttpMetricExporterFactory::Create(struct opentelemetry::v1::exporter::otlp::OtlpHttpMetricExporterOptions const &)
+    ?Create@OtlpHttpMetricExporterFactory@otlp@exporter@v1@opentelemetry@@SA?AV?$unique_ptr@VPushMetricExporter@metrics@sdk@v1@opentelemetry@@U?$default_delete@VPushMetricExporter@metrics@sdk@v1@opentelemetry@@@std@@@std@@AEBUOtlpHttpMetricExporterOptions@2345@@Z
+    ?GetOtlpDefaultHttpMetricsEndpoint@otlp@exporter@v1@opentelemetry@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ
 #endif  // defined(WITH_OTLP_HTTP)
 // clang-format on

sdk/include/opentelemetry/sdk/metrics/export/periodic_exporting_metric_reader_factory.h

@@ -16,7 +16,7 @@ namespace metrics
 class MetricReader;
 class PushMetricExporter;
 
-class PeriodicExportingMetricReaderFactory
+class OPENTELEMETRY_EXPORT PeriodicExportingMetricReaderFactory
 {
 public:
   static std::unique_ptr<MetricReader> Create(std::unique_ptr<PushMetricExporter> exporter,

sdk/include/opentelemetry/sdk/metrics/meter_context_factory.h

@@ -21,7 +21,7 @@ class ViewRegistry;
 /**
  * Factory class for MeterContext.
  */
-class MeterContextFactory
+class OPENTELEMETRY_EXPORT MeterContextFactory
 {
 public:
   /**

sdk/include/opentelemetry/sdk/metrics/meter_provider.h

@@ -30,7 +30,7 @@ class MeterContext;
 class MetricCollector;
 class MetricReader;
 
-class MeterProvider final : public opentelemetry::metrics::MeterProvider
+class OPENTELEMETRY_EXPORT MeterProvider final : public opentelemetry::metrics::MeterProvider
 {
 public:
   /**

sdk/include/opentelemetry/sdk/metrics/meter_provider_factory.h

@@ -56,7 +56,7 @@ namespace metrics
   even if this forces, temporarily, existing applications to use a downcast.
 */
 
-class MeterProviderFactory
+class OPENTELEMETRY_EXPORT MeterProviderFactory
 {
 public:
   static std::unique_ptr<opentelemetry::metrics::MeterProvider> Create();

sdk/include/opentelemetry/sdk/metrics/view/instrument_selector_factory.h

@@ -14,7 +14,7 @@ namespace metrics
 
 class InstrumentSelector;
 
-class InstrumentSelectorFactory
+class OPENTELEMETRY_EXPORT InstrumentSelectorFactory
 {
 public:
   static std::unique_ptr<InstrumentSelector> Create(

sdk/include/opentelemetry/sdk/metrics/view/meter_selector_factory.h

@@ -16,7 +16,7 @@ namespace metrics
 
 class MeterSelector;
 
-class MeterSelectorFactory
+class OPENTELEMETRY_EXPORT MeterSelectorFactory
 {
 public:
   static std::unique_ptr<MeterSelector> Create(opentelemetry::nostd::string_view name,