MantisBT - CMake
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IDProjectCategoryView StatusDate SubmittedLast Update
0016059CMakeCMakepublic2016-04-12 12:002016-06-10 14:31
ReporterAntonio 
Assigned ToKitware Robot 
PrioritynormalSeverityminorReproducibilityalways
StatusclosedResolutionmoved 
PlatformX86OSWindowsOS Version7
Product VersionCMake 3.4.1 
Target VersionFixed in Version 
Summary0016059: It is not possible to specify a linker different from the compiler to link a shared library
DescriptionIn some situations, it might be convenient to specify a different linker than the compiler. For example, for llvm combined with mingw, compiling with clang and linking with gcc would work. The workaround proposed here https://cmake.org/pipermail/cmake/2014-August/058268.html [^] does not seem to work.
Steps To ReproduceRequires 2 compilers to be there. In the attached project,
Configuring with
D:\dummyProj\build> cmake ..\src -G "Eclipse CDT4 - Ninja" -DCMAKE_TOOLCHAIN_FILE=..\src\Toolchain-LLVM.cmake -DCMAKE_LINKER=C:/Programs/mingw32_493_posix_dwarf/bin/g++.exe -DCMAKE_CXX_LINK_EXECUTABLE="<CMAKE_LINKER> <FLAGS> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>" -DCMAKE_CXX_CREATE_SHARED_LIBRARY="<CMAKE_LINKER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <SONAME_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>"

Building will anyway lead to the following commands to be generated:
[1/2] C:\Programs\LLVM\bin\clang++.exe -Ddummy_EXPORTS -MMD -MT CMakeFiles/dummy.dir/dummy.cpp.obj -MF CMakeFiles/dummy.dir/dummy.cpp.obj.d -o CMakeFiles/dummy.dir/dummy.cpp.obj -c D:/dummyProj/src/dummy.cpp
[2/2] cmd.exe /C "cd . && C:\Programs\LLVM\bin\clang++.exe -shared -o libdummy.dll -Wl,--out-implib,libdummy.dll.a -Wl,--major-image-version,0,--minor-image-version,0 CMakeFiles/dummy.dir/dummy.cpp.obj -lkernel32 -luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32 && cd ."
FAILED: cmd.exe /C "cd . && C:\Programs\LLVM\bin\clang++.exe -shared -o libdummy.dll -Wl,--out-implib,libdummy.dll.a -Wl,--major-image-version,0,--minor-image-version,0 CMakeFiles/dummy.dir/dummy.cpp.obj -lkernel32 -luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32 && cd ."
C:\Programs\mingw32_493_posix_dwarf\i686-w64-mingw32\lib/libmingw32.a(lib32_libmingw32_a-pseudo-reloc.o):pseudo-reloc.c:(.text+0x1d6): undefined reference to `__chkstk_ms'

clang++.exe: error: linker command failed with exit code 1 (use -v to see invocation)

ninja: build stopped: subcommand failed.

The first command is correct, the second doesn't use g++ to link as desired. Linking succeeds if g++ is replaced in the command line.
Additional Information
TagsClang, CMake, linker, LLVM
Relationships
Attached Fileszip dummyProj.zip (84,997) 2016-04-12 12:00
https://public.kitware.com/Bug/file/5673/*
Issue History
Date ModifiedUsernameFieldChange
2016-04-12 12:00AntonioNew Issue
2016-04-12 12:00AntonioFile Added: dummyProj.zip
2016-04-20 09:28AntonioTag Attached: Clang
2016-04-20 09:28AntonioTag Attached: linker
2016-04-20 09:28AntonioTag Attached: locale
2016-04-20 09:28AntonioTag Detached: locale
2016-04-20 09:29AntonioTag Attached: CMake
2016-04-20 09:29AntonioTag Attached: LLVM
2016-06-10 14:29Kitware RobotNote Added: 0042980
2016-06-10 14:29Kitware RobotStatusnew => resolved
2016-06-10 14:29Kitware RobotResolutionopen => moved
2016-06-10 14:29Kitware RobotAssigned To => Kitware Robot
2016-06-10 14:31Kitware RobotStatusresolved => closed

Notes
(0042980)
Kitware Robot   
2016-06-10 14:29   
Resolving issue as `moved`.

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