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This question is mostly related to node-gyp, GCC and the NDK toolchain, but I will add the full context because it may be necessary.

Context

I am building an App using React Native. Since I need to use node native libraries in this App, I am using this node module nodejs-mobile for running a Node.js process on Android and iOS.

When adding the composer-admin module, I am having compilation issues for Android.

Error

The compiler is failing when linking the grpc_node module which is required by a composer-admin dependency. The error is:


[LIB 1 PATH OMITTED] requires unsupported dynamic reloc R_ARM_REL32; recompile with -fPIC
...
[LIB N PATH OMITTED] requires unsupported dynamic reloc R_ARM_REL32; recompile with -fPIC
clang70++: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [grpc_node.target.mk:189: Release/obj.target/grpc_node.node] Error 1
make: Leaving directory '/home/vanclief/Cacao_repos/react-app/android/build/nodejs-native-assets-temp-build/nodejs-native-assets-armeabi-v7a/nodejs-project/node_modules/fabric-client/node_modules/grpc/build'


The weird thing is the -fPIC flag is being used as specified in the common.gypi:


/home/vanclief/Cacao_repos/react-app/android/build/standalone-toolchains/arm-linux-androideabi/bin/arm-linux-androideabi-clang++ -shared -g -rdynamic -fPIC -Wl,-soname=grpc_node.node -o


This is the full compilation log

common.gypi is wrong. It has -fPIC in ldflags. It needs to be in cflags.

How did you edit the common.gypi?
I am having a very similar issue with very same error requires unsupported dynamic reloc R_ARM_REL32; recompile with -fPIC

I see that common.gypi has ldflags for -fPIC. I changed to following but still get the same issue.
Please provide your fix

['OS=="android"', {

        'conditions': [

          [ 'node_shared=="true"', {

            'ldflags': [ '-fPIC' ],

'cflags': [ '-fPIC' ], #Change 1

          }]

        ],

        'target_conditions': [

          ['_toolset=="target"', {

            'defines': [ '_GLIBCXX_USE_C99_MATH' ],

            'libraries': [ '-llog' ],

          }],

          [ '_type=="loadable_module"', {

            'ldflags': [ '-fPIC' ],

'cflags': [ '-fPIC' ], #Change 2

            'conditions': [

              # While loading a native node module, Android needs to have a

              # (NEEDED) entry for libnode.so, or it won't be able to locate

              # referenced symbols.

              # We link to the binary libraries that are distributed with the

              # nodejs-mobile headers so the (NEEDED) entry is created

              [ 'target_arch=="arm"', {

                'libraries': ['>(node_root_dir)/bin/armeabi-v7a/libnode.so'],

              }],

              [ 'target_arch=="arm64"', {

                'libraries': ['>(node_root_dir)/bin/arm64-v8a/libnode.so'],

              }],

              [ 'target_arch=="x86"', {

                'libraries': ['>(node_root_dir)/bin/x86/libnode.so'],

              }],

              [ 'target_arch=="x86_64"', {

                'libraries': ['>(node_root_dir)/bin/x86_64/libnode.so'],

              }],

            ],

          }],

        ],

      }],