opentelemetry-cpp : library mismatch causes link error?

I'm having issues with what appears to be a nostd:: std:: clash in libraries under ubuntu 22. opentelemetry-cpp was configured with:

cmake -DBUILD_TESTING=OFF -DWITH_EXAMPLES=OFF -DCMAKE_POSITION_INDEPENDENT_CODE=ON -DBUILD_SHARED_LIBS=ON -DWITH_OTLP_HTTP=ON -DWITH_OTLP_GRPC=ON -DWITH_ABI_VERSION_1=OFF -DWITH_ABI_VERSION_2=ON -DWITH_STL=ON -DCMAKE_CXX_STANDARD=17 ..

this built successfully. The test app uses a otlp grpc log exporter, and the problem seems to be that the application wants the 1st parameter to LoggerProvider::GetLogger to be opentelemetry::v2::nostd::string_view, while libopentelemetry_logs.so shows a std::basic_string_view for the first parameter. (see make and nm output below)

$ make
g++ otel_test.o -L/home/mandrews/downloads/github/opentelemetry-cpp/build/exporters/otlp -lopentelemetry_common -L/home/mandrews/downloads/github/opentelemetry-cpp/build/sdk/src/common -lopentelemetry_exporter_otlp_grpc -lopentelemetry_exporter_otlp_grpc_client -lopentelemetry_exporter_otlp_grpc_log -lopentelemetry_exporter_otlp_http_log -L/home/mandrews/downloads/github/opentelemetry-cpp/build/sdk/src/logs -lopentelemetry_logs -L/home/mandrews/downloads/github/opentelemetry-cpp/build/sdk/src/trace -lopentelemetry_trace -L/home/mandrews/downloads/github/opentelemetry-cpp/build/_deps/grpc-build/third_party/protobuf -lprotobuf  -o otel_test
/usr/bin/ld: otel_test.o: in function `main':
/home/mandrews/dev/otel_test.cpp:41: undefined reference to `opentelemetry::v2::sdk::logs::LoggerProvider::GetLogger(opentelemetry::v2::nostd::string_view, opentelemetry::v2::nostd::string_view, opentelemetry::v2::nostd::string_view, opentelemetry::v2::nostd::string_view, opentelemetry::v2::common::KeyValueIterable const&)'
collect2: error: ld returned 1 exit status
make: *** [Makefile:45: otel_test] Error 1


$ nm ./sdk/src/logs/libopentelemetry_logs.so | grep GetLogger
00000000001ff854 T _ZN13opentelemetry2v23sdk4logs14LoggerProvider9GetLoggerESt17basic_string_viewIcSt11char_traitsIcEES7_S7_S7_RKNS0_6common16KeyValueIterableE
00000000001fc8ea W _ZN13opentelemetry2v24logs18NoopLoggerProvider9GetLoggerESt17basic_string_viewIcSt11char_traitsIcEES6_S6_S6_RKNS0_6common16KeyValueIterableE
00000000002499b4 T _ZNK13opentelemetry2v23sdk4logs13LoggerContext21GetLoggerConfiguratorEv

How did the app get the idea it should want the nostd:: version ? Don't know how to fix this...

here is the Makefile:

oteldir=/home/mandrews/downloads/github/opentelemetry-cpp
otellibdir=$(oteldir)/build

appanalysisdir=$(projectdir)/app_analysis
zlibdir=$(thirdpartydir)/zlib

module_defs= -D_LINUX -DOPENTELEMETRY_ABI_VERSION_NO=2

sources=\
    otel_test.cpp

objects=$(sources:.cpp=.o)

cppflags=\
    -std=c++20 \
    -fno-omit-frame-pointer \
    -fpermissive \
    -Wno-unused-local-typedefs \
    $(module_defs) \
    -I. \
    -I$(oteldir)/ext/include \
    -I$(oteldir)/api/include \
    -I$(oteldir)/sdk/include \
    -I$(oteldir)/exporters/otlp/include

ldflags=\
    -L$(otellibdir)/exporters/otlp -lopentelemetry_common \
    -L$(otellibdir)/sdk/src/common -lopentelemetry_exporter_otlp_grpc -lopentelemetry_exporter_otlp_grpc_client \
    -lopentelemetry_exporter_otlp_grpc_log -lopentelemetry_exporter_otlp_http_log \
    -L$(otellibdir)/sdk/src/logs -lopentelemetry_logs \
    -L$(otellibdir)/sdk/src/trace -lopentelemetry_trace \
    -L$(otellibdir)/_deps/grpc-build/third_party/protobuf -lprotobuf 

ifeq ($(BUILD),DEBUG)
cppflags += -ggdb3 -O0 -D_DEBUG
else
cppflags += -g -Wall -O2 -DNDEBUG
endif

executable=otel_test
all: $(executable)

otel_test: $(objects)
    g++ $^ $(ldflags) -o $@

%.o: %.cpp
    g++ $(cppflags) -c -o $@ $<

clean:
    rm -f $(objects)
    rm -f $(executable)

what to do to compile successfully?

It's expected that you use cmake and target_link_libraries() that would bring the required compiler definitions to the target. Since you don't use cmake, you must add -DOPENTELEMETRY_STL_VERSION=2017 to cppflags:

cppflags += -DOPENTELEMETRY_STL_VERSION=2017

BTW, -DWITH_STL=ON -DCMAKE_CXX_STANDARD=17 are inconsistent: the first one defines OPENTELEMETRY_STL_VERSION=2023, but the compiler standard is set to C++17. -DWITH_STL=CXX17 -DCMAKE_CXX_STANDARD=17 should be passed.