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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.
TagsClang, CMake, linker, LLVM
Attached Fileszip file icon dummyProj.zip [^] (84,997 bytes) 2016-04-12 12:00

 Relationships

  Notes
(0042980)
Kitware Robot (administrator)
2016-06-10 14:29

 Resolving issue as `moved`.

This issue tracker is no longer used. Further discussion of this issue may take place in the current CMake Issues page linked in the banner at the top of this page.

 Issue History
Date Modified Username Field Change
2016-04-12 12:00 Antonio New Issue
2016-04-12 12:00 Antonio File Added: dummyProj.zip
2016-04-20 09:28 Antonio Tag Attached: Clang
2016-04-20 09:28 Antonio Tag Attached: linker
2016-04-20 09:28 Antonio Tag Attached: locale
2016-04-20 09:28 Antonio Tag Detached: locale
2016-04-20 09:29 Antonio Tag Attached: CMake
2016-04-20 09:29 Antonio Tag Attached: LLVM
2016-06-10 14:29 Kitware Robot Note Added: 0042980
2016-06-10 14:29 Kitware Robot Status new => resolved
2016-06-10 14:29 Kitware Robot Resolution open => moved
2016-06-10 14:29 Kitware Robot Assigned To => Kitware Robot
2016-06-10 14:31 Kitware Robot Status resolved => closed

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