Link error with 1.38.30

[Jérémy Sorant]

Hello,

I try to generate a WASM library but the build fails at link step. It seems that we are linking with the wrong standard library as we fail to find "std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> >::compare(unsigned int, unsigned int, char const*, unsigned int) const".

Do someone know how to fix this ?

Here is the command that fails and the error log:

cmd.exe /C "cd . && C:\dev\emsdk\emscripten\1.38.30\em++.bat -std=c++17 -Oz --llvm-lto 1 -std=c++17 -s DISABLE_EXCEPTION_CATCHING=0 -s MODULARIZE=1 -s ALLOW_MEMORY_GROWTH=1 -s WASM=1 -s EXPORT_NAME="'WASM_StormshieldData'" -DNDEBUG -O2 --bind -s MODULARIZE=1 -s ALLOW_MEMORY_GROWTH=1 -s WASM=1 -s EXPORT_NAME="'WASM_StormshieldData'" -O2 JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/binarystream.cpp.o JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/binding.cpp.o JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/aescbc.cpp.o JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/aesctr.cpp.o JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/random.cpp.o JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/hash.cpp.o JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/pbkdf2.cpp.o JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/aeskw.cpp.o JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/rsakeypair.cpp.o JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/rsakeygen.cpp.o JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/x509.cpp.o JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/rsapkcs1-5.cpp.o JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/rs256.cpp.o JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/p12parser.cpp.o JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/smime.cpp.o JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/fileencryptor.cpp.o JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/filedecryptor.cpp.o JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/ioc.cpp.o JsWrapper/CMakeFiles/JSWrapper-wasm.dir/src/exception.cpp.o -o OUTPUT\StormshieldData-wasm.js OUTPUT/libCoreCryptoSDS.a OUTPUT/libCoreCryptoFile.a C:/dev/SDS4C/../EXTERNAL_CACHE/SCM/1.0.2/web/Clang6.0.1/wasm/Release/lib/libSCMStatic.a OUTPUT/libCoreModel.a OUTPUT/libCoreCryptoInterface.a OUTPUT/libUtilities.a C:/dev/SDS4C/../EXTERNAL_CACHE/jsoncpp/1.8.4/web/Clang6.0.1/wasm/Release/lib/libjsoncpp.a C:/dev/SDS4C/../EXTERNAL_CACHE/openssl/1.1.1a/web/Clang6.0.1/wasm/Release/lib/libssl.a C:/dev/SDS4C/../EXTERNAL_CACHE/openssl/1.1.1a/web/Clang6.0.1/wasm/Release/lib/libcrypto.a && cd ."

error: undefined symbol: _ZNKSt3__212basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE7compareEjjPKcj

warning: To disable errors for undefined symbols use `-s ERROR_ON_UNDEFINED_SYMBOLS=0`

error: undefined symbol: _ZNSt3__212basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6__initEPKcj

error: undefined symbol: _ZNSt3__212basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6__initEjc

error: undefined symbol: _ZNSt3__212basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6appendEPKcj

error: undefined symbol: _ZNSt3__212basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6insertEjPKc

error: undefined symbol: _ZNSt3__212basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6resizeEjc

error: undefined symbol: _ZNSt3__212basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE7reserveEj

error: undefined symbol: _Znaj

error: undefined symbol: _Znwj

Error: Aborting compilation due to previous errors

shared:ERROR: 'C:/dev/emsdk/node/8.9.1_64bit/bin/node.exe C:\dev\emsdk\emscripten\1.38.30\src\compiler.js C:\Users\JEREMY~1.SOR\AppData\Local\Temp\tmpgl7y7z.txt C:\dev\emsdk\emscripten\1.38.30\src\embind\emval.js C:\dev\emsdk\emscripten\1.38.30\src\embind\embind.js C:\dev\emsdk\emscripten\1.38.30\src\library_pthread_stub.js' failed (1)

ninja: build stopped: subcommand failed.

[Jérémy Sorant]

Here is a full log with EMCC_DEBUG=2

https://pastebin.com/mD0JX4FV

[Gabriel Cuvillier]

Hello,

How did you compiled the lib*.a files that are linked with your project (for example: libSCMStatic.a or libcrypto.a) ? Maybe it is possible they were compiled with a slightly different version of the standard library (and version of emscripten). If you can, try to recompile everything from scratch using the same toolchain version as your JSWrapper project. Well, that's just a possibility.

Cheers,

Gabriel

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[Jérémy Sorant]

Hum, you're right, those lib were compiled with emscripten 1.38.6...

I will look at this more closely, thanks a lot.

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[Jérémy Sorant]

That's it ! 

The other libs where built with emsdk 1.38.6 and I tried to use them in my workspace that uses emsdk 1.38.30.

Thanks a lot !