[LLVMdev] Linking C++ on Windows

[Paul J. Lucas]

I've followed all the LLVM+clang build-from-source instructions for Windows using MSVC++ 2008.  It all builds fine.  I initially had troubling getting any linking to work at all until I made sure to have the right environment variables set using a wrapper batch script. Now C programs compile, link, and execute fine, but C++ programs don't link, not even a simple "hello, world" program.  Error messages (with clang++ verbose output) below.

How can I get C++ programs to link?

- Paul

clang version 3.0 (tags/RELEASE_30/final)
Target: i686-pc-win32
Thread model: posix
 "C:/cygwin/usr/local/packages/llvm-3.0/bin/clang++.exe" -cc1 -triple i686-pc-win32 -emit-obj -mrelax-all -disable-free -main-file-name hello.cpp -mrelocation-model static -mdisable-fp-elim -masm-verbose -mconstructor-aliases -target-cpu pentium4 -momit-leaf-frame-pointer -v -resource-dir "C:/cygwin/usr/local/packages/llvm-3.0/bin\\..\\lib\\clang\\3.0" -fmodule-cache-path "C:\\cygwin\\tmp\\clang-module-cache" -internal-isystem C:/cygwin/usr/local/packages/llvm-3.0/bin/../lib/clang/3.0/include -internal-isystem "C:\\Program Files\\Microsoft Visual Studio 9.0\\VC\\include" -internal-isystem "C:\\Program Files\\Microsoft SDKs\\Windows\\v7.0\\\\include" -fdeprecated-macro -ferror-limit 19 -fmessage-length 0 -fms-extensions -fms-compatibility -fmsc-version=1300 -fdelayed-template-parsing -fgnu-runtime -fobjc-runtime-has-arc -fobjc-runtime-has-weak -fobjc-fragile-abi -fcxx-exceptions -fexceptions -fdiagnostics-show-option -o C:/cygwin/tmp/hello-066049.o -x c++ hello.cpp
clang -cc1 version 3.0 based upon llvm 3.0 hosted on i686-pc-win32
#include "..." search starts here:
#include <...> search starts here:
 C:/cygwin/usr/local/packages/llvm-3.0/bin/../lib/clang/3.0/include
 C:\Program Files\Microsoft Visual Studio 9.0\VC\include
 C:\Program Files\Microsoft SDKs\Windows\v7.0\\include
End of search list.
 "C:/Program Files/Microsoft Visual Studio 9.0/VC/BIN/link.exe" -out:a.out -defaultlib:libcmt -nologo C:/cygwin/tmp/hello-066049.o
hello-066049.o : error LNK2019: unresolved external symbol __ZSt4cout referenced in function _main
hello-066049.o : error LNK2019: unresolved external symbol __ZSt18uncaught_exceptionv referenced in function __ZNSo6sentryD2Ev
hello-066049.o : error LNK2019: unresolved external symbol __ZNSt6_Mutex7_UnlockEv referenced in function __ZNSt15basic_streambufIcSt11char_traitsIcEE7_UnlockEv
hello-066049.o : error LNK2019: unresolved external symbol ___cxa_rethrow referenced in function __ZNSt8ios_base5clearEib
hello-066049.o : error LNK2019: unresolved external symbol ___cxa_allocate_exception referenced in function __ZNSt8ios_base5clearEib
hello-066049.o : error LNK2019: unresolved external symbol ___cxa_throw referenced in function __ZNSt8ios_base5clearEib
hello-066049.o : error LNK2019: unresolved external symbol __ZdlPv referenced in function __ZNSaIcE10deallocateEPcj
hello-066049.o : error LNK2019: unresolved external symbol __ZNSt9exceptionD2Ev referenced in function __ZNSt13runtime_errorD2Ev
hello-066049.o : error LNK2019: unresolved external symbol __ZNSt12_String_base5_XranEv referenced in function __ZNSs6assignERKSsjj
hello-066049.o : error LNK2019: unresolved external symbol __ZNSt12_String_base5_XlenEv referenced in function __ZNSs5_GrowEjb
hello-066049.o : error LNK2019: unresolved external symbol __Znwj referenced in function __ZSt9_AllocateIcEPT_jS1_
hello-066049.o : error LNK2019: unresolved external symbol __ZNSt9exceptionC2ERKPKc referenced in function __ZNSt9bad_allocC2EPKc
hello-066049.o : error LNK2019: unresolved external symbol __ZNSt9exceptionC2Ev referenced in function __ZNSt13runtime_errorC2ERKSs
hello-066049.o : error LNK2019: unresolved external symbol __ZNSt6_Mutex5_LockEv referenced in function __ZNSt15basic_streambufIcSt11char_traitsIcEE5_LockEv
hello-066049.o : error LNK2001: unresolved external symbol __ZTVN10__cxxabiv120__si_class_type_infoE
hello-066049.o : error LNK2001: unresolved external symbol __ZTISt9exception
hello-066049.o : error LNK2001: unresolved external symbol __ZNKSt9exception4whatEv
a.out : fatal error LNK1120: 17 unresolved externals