Android Compile Error

[ghost]

• Version: v10.9.0
• Platform: Android

/home/rsplwe/node_build/node-v10.9.0/android-toolchain/bin/arm-linux-androideabi-g++ '-DV8_GYP_BUILD' '-DV8_TYPED_ARRAY_MAX_SIZE_IN_HEAP=0' '-DV8_TARGET_ARCH_ARM' '-DCAN_USE_ARMV7_INSTRUCTIONS' '-DCAN_USE_VFP3_INSTRUCTIONS' '-DCAN_USE_VFP32DREGS' '-DV8_EMBEDDER_STRING="-node.14"' '-DENABLE_DISASSEMBLER' '-DV8_PROMISE_INTERNAL_FIELD_COUNT' '-Dv8_promise_internal_field_count' '-DV8_INTL_SUPPORT' '-DV8_CONCURRENT_MARKING' '-DDISABLE_UNTRUSTED_CODE_MITIGATIONS' '-DANTLR4CPP_STATIC' -I../deps/v8/third_party/antlr4/runtime/Cpp/runtime/src -I../deps/v8/src/torque -I../deps/v8  -Wall -Wextra -Wno-unused-parameter -march=armv7-a -mfpu=vfpv3 -marm -fdata-sections -ffunction-sections -O2 -fno-omit-frame-pointer -fPIE -std=gnu++1y -MMD -MF /home/rsplwe/node_build/node-v10.9.0/out/Release/.deps//home/rsplwe/node_build/node-v10.9.0/out/Release/obj.host/torque/deps/v8/src/torque/ast-generator.o.d.raw  -I/home/rsplwe/Android/Sdk/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a/include -I/home/rsplwe/Android/Sdk/ndk-bundle/sources/cxx-stl/llvm-libc++/libcxx/include -fPIE -pie  -c -o /home/rsplwe/node_build/node-v10.9.0/out/Release/obj.host/torque/deps/v8/src/torque/ast-generator.o ../deps/v8/src/torque/ast-generator.cc
In file included from ../deps/v8/src/torque/ast-generator.h:9:0,
                 from ../deps/v8/src/torque/ast-generator.cc:8:
../deps/v8/src/torque/ast.h: In member function 'std::string v8::internal::torque::SourceFileMap::PositionAsString(v8::internal::torque::SourcePosition)':
../deps/v8/src/torque/ast.h:199:42: error: 'to_string' is not a member of 'std'
     return GetSource(pos.source) + ":" + std::to_string(pos.line) + ":" +
                                          ^
../deps/v8/src/torque/ast.h:200:12: error: 'to_string' is not a member of 'std'
            std::to_string(pos.column);
            ^
In file included from ../deps/v8/src/torque/global-context.h:10:0,
                 from ../deps/v8/src/torque/ast-generator.h:10,
                 from ../deps/v8/src/torque/ast-generator.cc:8:
../deps/v8/src/torque/declarable.h: In constructor 'v8::internal::torque::Label::Label(const string&)':
../deps/v8/src/torque/declarable.h:163:44: error: 'to_string' is not a member of 'std'
         generated_("label_" + name + "_" + std::to_string(next_id_++)),
                                            ^
In file included from ../deps/v8/src/torque/declarations.h:11:0,
                 from ../deps/v8/src/torque/global-context.h:11,
                 from ../deps/v8/src/torque/ast-generator.h:10,
                 from ../deps/v8/src/torque/ast-generator.cc:8:
../deps/v8/src/torque/scope.h: In member function 'void v8::internal::torque::Scope::Stream(std::ostream&) const':
../deps/v8/src/torque/scope.h:26:27: error: 'to_string' is not a member of 'std'
     stream << "scope " << std::to_string(scope_number_) << " {";
                           ^
deps/v8/gypfiles/torque.host.mk:276: recipe for target '/home/rsplwe/node_build/node-v10.9.0/out/Release/obj.host/torque/deps/v8/src/torque/ast-generator.o' failed
make[1]: *** [/home/rsplwe/node_build/node-v10.9.0/out/Release/obj.host/torque/deps/v8/src/torque/ast-generator.o] Error 1
rm 384f9c5c253bbc588c63d66c04a230edc0a146b5.intermediate 29f598d02843dc7efafdbc9308c6852050dc9336.intermediate
Makefile:87: recipe for target 'node' failed
make: *** [node] Error 2

[addaleax]

Since nobody has weighed in here … @Rsplwe this problem is most likely caused either because your system headers don’t provide std::to_string, even though it is part of C++11, or because there is some header file named string that gets included by accident.

I’m not sure how to address any of this, and it probably requires some digging around in your header files. Having the preprocessed source for one of the failing compile commands might help?

[ghost]

@addaleax I built with ndk according to the documentation's build method.

[lundibundi]

@Rsplwe Ok, so I've found this android/ndk#82 and https://stackoverflow.com/questions/22774009/android-ndk-stdto-string-support which tells us that android-ndk uses 'gnustl' cpp lib by default which doens't include some functions (std::to_string) in particular.
Therefore you have a few options here that are dependent on your situation:

• Use libc++ std library for ndk (just LOCAL_CFLAGS := -std=c++11 in Android.mk should work, otherwise refer to https://developer.android.com/ndk/guides/cpp-support)
• implement your own/copy from somewhere to_string (and possibly other functions) in project-local-file

Also, libc++ will soon (ndk r18) be the default and the gnustl will be removed completely (https://developer.android.com/ndk/guides/cpp-support).

[addaleax]

@Rsplwe Does @lundibundi’s answer help you?

[ghost]

@lundibundi thank you

[lundibundi]

I think this is resolved based on @Rsplwe comment. If you experience any more problems feel free to reopen.

[sruetzler]

@Rsplwe
How did you solve the problem?
I was not able to build nodejs for android. Even with the ndk 18 or with the -std=c++11 flags and something else.