Error when make -j #894

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1. robertroeser commented on Aug 7, 2019

   

   robertroeser

   on Aug 7, 2019

   Member

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   Does this fix your issue or is it something else?
   #888
2. xiongxiongjiang commented on Aug 8, 2019

   

   xiongxiongjiang

   on Aug 8, 2019

   Author

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   I tried, didn't work.
3. gf59ru commented on Aug 12, 2019

   

   gf59ru

   on Aug 12, 2019

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   Has same bug. Fix from #888 doesn't help.
4. timotheecour commented on Oct 16, 2019

   

   timotheecour

   on Oct 16, 2019

   Last edited by timotheecour

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   same error; this seems related to facebook/folly#1027
   here are the relevant code snippets from folly sources:

   template <>
   struct F14LinkCheck<getF14IntrinsicsMode()> {
     // The purpose of this method is to trigger a link failure if
     // compilation flags vary across compilation units.  The definition
     // is in F14Table.cpp, so only one of F14LinkCheck<None>::check,
     // F14LinkCheck<Simd>::check, or F14LinkCheck<SimdAndCrc>::check will
     // be available at link time.
     //
     // To cause a link failure the function must be invoked in code that
     // is not optimized away, so we call it on a couple of cold paths
     // (exception handling paths in copy construction and rehash).  LTO may
     // remove it entirely, but that's fine.
     static void check() noexcept;
   };

   // If you get a link failure that leads you here, your build has varying
   // compiler flags across compilation units in a way that would break F14.
   // SIMD (SSE2 or NEON) needs to be either on everywhere or off everywhere
   // that uses F14.  If SIMD is on then hardware CRC needs to be enabled
   // everywhere or disabled everywhere.
   void F14LinkCheck<getF14IntrinsicsMode()>::check() noexcept {}
5. iychche commented on Oct 22, 2020

   

   iychche

   on Oct 22, 2020

   Last edited by iychche

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   Is there a solution for this issue? I am new to C++ and I am trying to build this on Mac. Here is the error:

   Undefined symbols for architecture x86_64:
     "folly::f14::detail::F14LinkCheck<(folly::f14::detail::F14IntrinsicsMode)1>::check()", referenced from:
         folly::f14::detail::F14Table<folly::f14::detail::NodeContainerPolicy<folly::dynamic, folly::dynamic, folly::detail::DynamicHasher, folly::detail::DynamicKeyEqual, void> >::rehashImpl(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long)::'lambda'()::operator()() const in libreactivesocket_examples_util.a(ColdResumeManager.cpp.o)
   ld: symbol(s) not found for architecture x86_64
   clang: error: linker command failed with exit code 1 (use -v to see invocation)
   make[2]: *** [example_cold-resumption-client] Error 1
   make[1]: *** [CMakeFiles/example_cold-resumption-client.dir/all] Error 2
   make[1]: *** Waiting for unfinished jobs....
   Undefined symbols for architecture x86_64:
     "folly::f14::detail::F14LinkCheck<(folly::f14::detail::F14IntrinsicsMode)1>::check()", referenced from:
         folly::f14::detail::F14Table<folly::f14::detail::NodeContainerPolicy<folly::dynamic, folly::dynamic, folly::detail::DynamicHasher, folly::detail::DynamicKeyEqual, void> >::rehashImpl(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long)::'lambda'()::operator()() const in ColdResumeManager.cpp.o
   ld: symbol(s) not found for architecture x86_64
   clang: error: linker command failed with exit code 1 (use -v to see invocation)
   make[2]: *** [tests] Error 1
   make[1]: *** [CMakeFiles/tests.dir/all] Error 2
   make: *** [all] Error 2