After hours of debugging, I have the following minimalist .proto file:
syntax = "proto3";
message PbCaptureResult {
bool checkedValid = 1;
}
message PbCaptureResultSequence {
PbCaptureResult captureResults = 1;
}
It compiles and links successfully. But, if I add a "repeated" like:
syntax = "proto3";
message PbCaptureResult {
bool checkedValid = 1;
}
message PbCaptureResultSequence {
repeated PbCaptureResult captureResults = 1;
}
then I have a link error and get:
cmd.exe /C "cd . &&
C:\Android\Sdk\ndk\22.0.6917172\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++.exe
--target=aarch64-none-linux-android29
--gcc-toolchain=C:/Android/Sdk/ndk/22.0.6917172/toolchains/llvm/prebuilt/windows-x86_64
--sysroot=C:/Android/Sdk/ndk/22.0.6917172/toolchains/llvm/prebuilt/windows-x86_64/sysroot
-fPIC -g -DANDROID -fdata-sections -ffunction-sections -funwind-tables
-fstack-protector-strong -no-canonical-prefixes -D_FORTIFY_SOURCE=2
-Wformat -Werror=format-security -Wno-deprecated-declarations -O0
-fno-limit-debug-info -Wl,--exclude-libs,libgcc.a
-Wl,--exclude-libs,libgcc_real.a -Wl,--exclude-libs,libatomic.a
-Wl,--build-id=sha1 -Wl,--fatal-warnings -Wl,--no-undefined
-Qunused-arguments -shared -Wl,-soname,libnative-lib.so -o libnative-lib.so
@CMakeFiles/native-lib.rsp && cd ."
ld: error: undefined symbol:
google::protobuf::internal::RepeatedPtrFieldBase::AddOutOfLineHelper(void*)
>>> referenced by repeated_field.h:1767
(../../../../imported-lib/include\google/protobuf\repeated_field.h:1767)
>>>
CMakeFiles/native-lib.dir/src/main/cpp/authenticationLib/CaptureResultSequence.pb.cc.o:(google::protobuf::RepeatedPtrField<PbCaptureResult>::TypeHandler::Type*
google::protobuf::internal::RepeatedPtrFieldBase::Add<google::protobuf::RepeatedPtrField<PbCaptureResult>::TypeHandler>(google::protobuf::RepeatedPtrField<PbCaptureResult>::TypeHandler::Type*))
clang++: error: linker command failed with exit code 1 (use -v to see
invocation)
If the "repeated" come before a "standard type" such as string then it
compiles:
syntax = "proto3";
message PbCaptureResult {
bool checkedValid = 1;
}
message PbCaptureResultSequence {
repeated string captureResults = 1;
}
it's only if I try to repeat a custom message that I have an issue.
But in the protobuf website I found the following example:
message SearchResponse {
repeated Result results = 1;
}
message Result {
string url = 1;
string title = 2;
repeated string snippets = 3;
}
I have put the example as is in my .proto file and it failed to compile
with the same linking error. I concluded that it's not a .proto syntax
problem.
It's protobuf 3.15.5.
The generating command is: ./bin/protoc.exe --cpp_out=..
CaptureResultSequence.proto
I am static linking against libprotobuf.a (not libprotobuf-lite.a)
I have cross compiled protobuf myself
I initially thought that the issue was related to linking, but for me it
doesn't explain why I can link without "repeated" but can't link with it.
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