Folks I'm trying to handle a linking problem coming out of linking a command line app to a c++ based library. But if I defined those methods inline with the class definition, no problem is there ...
Problem shows -- Ld Build/Products/Debug/COMM_Srv normal x86_64
cd /Users/prokash.sinha/mysrc/C++/COMM_Srv
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -target x86_64-apple-macos11.3 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.3.sdk -L/Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Products/Debug -L/Users/prokash.sinha/mysrc/C++/COMM-BUS/Build/Products/Debug -F/Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Products/Debug -filelist /Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Intermediates.noindex/COMM_Srv.build/Debug/COMM_Srv.build/Objects-normal/x86_64/COMM_Srv.LinkFileList -Xlinker -object_path_lto -Xlinker /Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Intermediates.noindex/COMM_Srv.build/Debug/COMM_Srv.build/Objects-normal/x86_64/COMM_Srv_lto.o -Xlinker -export_dynamic -Xlinker -no_deduplicate -stdlib=libc++ -v -lCOMM-BUS -Xlinker -dependency_info -Xlinker /Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Intermediates.noindex/COMM_Srv.build/Debug/COMM_Srv.build/Objects-normal/x86_64/COMM_Srv_dependency_info.dat -o /Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Products/Debug/COMM_Srv
Apple clang version 12.0.5 (clang-1205.0.22.11)
Target: x86_64-apple-macos11.3
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
"/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld" -demangle -lto_library /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/libLTO.dylib -dynamic -arch x86_64 -platform_version macos 11.3.0 11.3 -syslibroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.3.sdk -o /Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Products/Debug/COMM_Srv -L/Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Products/Debug -L/Users/prokash.sinha/mysrc/C++/COMM-BUS/Build/Products/Debug -filelist /Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Intermediates.noindex/COMM_Srv.build/Debug/COMM_Srv.build/Objects-normal/x86_64/COMM_Srv.LinkFileList -object_path_lto /Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Intermediates.noindex/COMM_Srv.build/Debug/COMM_Srv.build/Objects-normal/x86_64/COMM_Srv_lto.o -export_dynamic -no_deduplicate -lCOMM-BUS -dependency_info /Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Intermediates.noindex/COMM_Srv.build/Debug/COMM_Srv.build/Objects-normal/x86_64/COMM_Srv_dependency_info.dat -lc++ -lSystem /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/12.0.5/lib/darwin/libclang_rt.osx.a -F/Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Products/Debug
Undefined symbols for architecture x86_64:
"TCPStream::s_send(char*, long)", referenced from:
_main in main.o
"TCPStream::receive(char*, long)", referenced from:
_main in main.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
nm on the lib --
bash-3.2$ nm Products/Debug/libCOMM-BUS.dylib | grep TCPStream
0000000000003710 T __ZN9TCPStream6s_sendEPcl
00000000000037a0 T __ZN9TCPStream7receiveEPcl
0000000000003660 T __ZN9TCPStreamC1EiP11sockaddr_un
00000000000035a0 T __ZN9TCPStreamC2EiP11sockaddr_un
00000000000036f0 T __ZN9TCPStreamD1Ev
0000000000003690 T __ZN9TCPStreamD2Ev
Constructor and Destructor defines are fine in the cpp file. The s_send and receive methods are not like one or two liners, so was trying to put them in C++ implementation files.
Is there something more I need in terms of linking ?
TIA -P
