linphone-sdk build error

[zxpgo]

** BUILD FAILED **

The following build commands failed:
CompileC /Users/a406/work/linphone-sdk/build-4.4.2/WORK/ios-x86_64/Build/bctoolbox/src/bctoolbox.build/Debug-iphonesimulator/bctoolbox.build/Objects-normal/x86_64/exception.o src/utils/exception.cc normal x86_64 c++ com.apple.compilers.llvm.clang.1_0.compiler
(1 failure)
make[1]: *** [/Users/a406/work/linphone-sdk/build-4.4.2/WORK/ios-x86_64/Stamp/EP_bctoolbox/Debug-iphonesimulator/EP_bctoolbox-build] Error 65

** BUILD FAILED **

The following build commands failed:
PhaseScriptExecution CMake\ Rules /Users/a406/work/linphone-sdk/build-4.4.2/ios-x86_64/Project.build/Debug-iphonesimulator/EP_bctoolbox.build/Script-22EFF921860B4679BF481F48.sh
(1 failure)
make: *** [/Users/a406/work/linphone-sdk/build-4.4.2/ios-x86_64-prefix/src/ios-x86_64-stamp/Debug/ios-x86_64-build] Error 65

** BUILD FAILED **

The following build commands failed:
PhaseScriptExecution CMake\ Rules build-4.4.2/linphone-sdk.build/Debug/ios-x86_64.build/Script-842D8FCD71DC4D8C951E5FFE.sh
(1 failure)