Hey,
I have an issue while trying to link some clang compiled code. When I compile my test dll with clang I get a new operator like this:
__Znwj
I guess this is conformant with GCC’s naming.
But when compiling with visual studio the new operator is:
Searching libraries
Searching C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\LIB\MSVCRTD.lib:
Found __purecall
Referenced in ConsoleApplication2.obj
Loaded MSVCRTD.lib(MSVCR110D.dll)
Found “void * __cdecl operator new(unsigned int)” (??2@YAPAXI@Z)
Referenced in ConsoleApplication2.obj
Loaded MSVCRTD.lib(MSVCR110D.dll)
Found “void __cdecl operator delete(void *)” (??3@YAXPAX@Z)
Referenced in ConsoleApplication2.obj
Loaded MSVCRTD.lib(MSVCR110D.dll)
I also noticed that with Clang I get a symbol for pure call catches called:
___cxa_pure_virtual
I assume the __purecall above is the visual studio version.
When I try to link the clang compiled object file using link.exe I get unresolved symbol errors because of this.
F:\LLVM-fresh\vs11\bin\Debug>clang++ -c testdll.cpp -o testdll.o -v
clang version 3.5 (trunk)
Target: i686-pc-win32
Thread model: posix
“F:\LLVM-fresh\vs11\bin\Debug\clang++.exe” -cc1 -triple i686-pc-win32 -emit-obj
-mrelax-all -disable-free -main-file-name testdll.cpp -mrelocation-model static
-mdisable-fp-elim -fmath-errno -masm-verbose -mconstructor-aliases -target-cpu
pentium4 -v -coverage-file “F:\LLVM-fresh\vs11\bin\Debug\testdll.o” -resour
ce-dir “F:\LLVM-fresh\vs11\bin\Debug\…\lib\clang\3.5” -internal-isystem
“F:\LLVM-fresh\vs11\bin\Debug\…\lib\clang\3.5\include” -internal-isys
tem “C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE” -intern
al-isystem “C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\ATLMFC\I
NCLUDE” -internal-isystem “C:\Program Files (x86)\Microsoft SDKs\Windows\v7.
0A\include” -std=c++11 -fdeprecated-macro -fdebug-compilation-dir “F:\LLVM-fre
sh\vs11\bin\Debug” -ferror-limit 19 -fmessage-length 80 -mstackrealign -fms-e
xtensions -fms-compatibility -fmsc-version=1700 -fdelayed-template-parsing -fobj
c-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -fcolor-di
agnostics -vectorize-slp -o testdll.o -x c++ testdll.cpp
clang -cc1 version 3.5 based upon LLVM 3.5svn default target i686-pc-win32
#include “…” search starts here:
#include <…> search starts here:
F:\LLVM-fresh\vs11\bin\Debug..\lib\clang\3.5\include
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\ATLMFC\INCLUDE
C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\include
End of search list.
F:\LLVM-fresh\vs11\bin\Debug>nm testdll.o
00000000 t .text
00000000 t .text
00000001 a @feat.00
00000000 T __ZN7testOneC2Ev
U __Znwj
00000000 T _whatever
F:\LLVM-fresh\vs11\bin\Debug>
C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\bin>link /DLL /NOENTRY te
stdll.o /VERBOSE
Microsoft (R) Incremental Linker Version 11.00.50727.1
Copyright (C) Microsoft Corporation. All rights reserved.
Starting pass 1
Searching libraries
Finished searching libraries
Finished pass 1
testdll.o : error LNK2019: unresolved external symbol __Znwj referenced in funct
ion _whatever
testdll.dll : fatal error LNK1120: 1 unresolved externals
How can I get this to link? Thanks.