ld: 4 duplicate symbols for architecture arm64

[cuibeihong]

i use Xcode10.1 run React native xcodeproj
error:

duplicate symbol __ZN5realm5_impl12partial_sync9WorkQueue13create_threadEv in:
/Users/div/Library/Developer/Xcode/DerivedData/.../Build/Products/Debug-iphoneos/libRealmReact.a(work_queue.o)
duplicate symbol __ZN5realm5_impl12partial_sync9WorkQueueD2Ev in:
/Users/div/Library/Developer/Xcode/DerivedData/.../Build/Products/Debug-iphoneos/libRealmReact.a(work_queue.o)
duplicate symbol __ZN5realm5_impl12partial_sync9WorkQueueD1Ev in:
/Users/div/Library/Developer/Xcode/DerivedData/.../Build/Products/Debug-iphoneos/libRealmReact.a(work_queue.o)
duplicate symbol __ZN5realm5_impl12partial_sync9WorkQueue7enqueueENSt3__18functionIFvvEEE in:
/Users/div/Library/Developer/Xcode/DerivedData/.../Build/Products/Debug-iphoneos/libRealmReact.a(work_queue.o)
ld: 4 duplicate symbols for architecture arm64

• Realm JS SDK Version: 2.21.1
• React Native: 0.57.4

i'm sure add & link realm success.
i need help!

[kneth]

@cuibeihong Building with Xcode 10 might be causing trouble. Please use Xcode 9.

[dakkafex]

Same issue as of Xcode 11.1, also still with 10, is there a fix for this, or a confirmation that xcode 9 is still the only way?

[madeeha96]

Facing same issue!

[kneth]

@dakkafex @madeeha96 Which version of Realm JS do you use? Older versions will probably require older versions of Xcode to build. Moreover, if you upgrade from one Realm JS version to a newer version, clearing the build folder can be a good idea.