[llvm-dev] Supporting libunwind on Windows 10 (32bit; 64bit) for MSVC and Clang
Ivan Serdyuk via llvm-dev
llvm-dev at lists.llvm.org
Sat Aug 15 12:49:34 PDT 2020
I had no targets on Itanium - and I do not have such hardware around.
https://go.googlesource.com/gollvm/ depends on
https://github.com/ianlancetaylor/libbacktrace .
It was able to compile libbacktrace on x86_64 Linux (Intel)
https://github.com/ianlancetaylor/libbacktrace/blob/5a99ff7fed66b8ea8f09c9805c138524a7035ece/README.md
- and must say that Itanium related API was adopted to work on Linux.
So my issues are around searching for a replacement - I thought that LLVM's
subproject could be a modern option. Ian explained that he is not familiar
with what LLVM's sub-projects offer - but it is more modern, compared to
what GNU lib offers.
So it would allow me to get read of GNU related dependencies.
Back to the linking bug: the question is in a choice for Windows native
functionality (library), which would either give similar capabilities or it
would make sense to re-implemented unwinding API (Windows has its own
support for unwinding, according to MSDN).
So while patching the build config is a matter of the near future (just to
check API compatibility and allow gollvm to compile, during the next stage)
- alternative unwinding APIs could be proposed.
https://github.com/ianlancetaylor/libbacktrace/tree/5a99ff7fed66b8ea8f09c9805c138524a7035ece
doesn't have a Windows poty, so far. It would require re-designing, to use
LLVM oriented approach.
Ivan
On Sat, Aug 15, 2020 at 6:48 PM Shoaib Meenai <smeenai at fb.com> wrote:
> libunwind is only needed on Windows if you’re using the Itanium C++ ABI
> (e.g. with MinGW).
>
That does not explain why I saw x86_64 options, among the source code.
> What’s your end goal with building libunwind?
>
>
>
> *From: *llvm-dev <llvm-dev-bounces at lists.llvm.org> on behalf of Ivan
> Serdyuk via llvm-dev <llvm-dev at lists.llvm.org>
> *Reply-To: *Ivan Serdyuk <local.tourist.kiev at gmail.com>
> *Date: *Saturday, August 15, 2020 at 10:05 AM
> *To: *"llvm-dev at lists.llvm.org" <llvm-dev at lists.llvm.org>
> *Subject: *[llvm-dev] Supporting libunwind on Windows 10 (32bit; 64bit)
> for MSVC and Clang
>
>
>
>
>
> Hello.
>
> I was trying to compile
> https://github.com/llvm/llvm-project/tree/master/libunwind using:
>
> · MSVC
>
> · Clang
>
> I wasn't able to configure this project for using MSVC (directly or via
> clang-cl):
>
> >cmake -G Ninja -DLLVM_PATH="C:/Users/clang/llvm-project-10.0.1/llvm"
> -DCMAKE_BUILD_TYPE=Release
> -DCMAKE_INSTALL_PREFIX="C:\Users\clang\libunwind_llvm" ../libunwind
>
> -- The C compiler identification is MSVC 19.27.29109.0
>
> -- The CXX compiler identification is MSVC 19.27.29109.0
>
> -- Check for working C compiler: C:/Program Files/Microsoft Visual
> Studio/2019/Preview/VC/Tools/MSVC/14.27.29109/bin/Hostx86/x86/cl.exe
>
> -- Check for working C compiler: C:/Program Files/Microsoft Visual
> Studio/2019/Preview/VC/Tools/MSVC/14.27.29109/bin/Hostx86/x86/cl.exe --
> works
>
> -- Detecting C compiler ABI info
>
> -- Detecting C compiler ABI info - done
>
> -- Detecting C compile features
>
> -- Detecting C compile features - done
>
> -- Check for working CXX compiler: C:/Program Files/Microsoft Visual
> Studio/2019/Preview/VC/Tools/MSVC/14.27.29109/bin/Hostx86/x86/cl.exe
>
> -- Check for working CXX compiler: C:/Program Files/Microsoft Visual
> Studio/2019/Preview/VC/Tools/MSVC/14.27.29109/bin/Hostx86/x86/cl.exe --
> works
>
> -- Detecting CXX compiler ABI info
>
> -- Detecting CXX compiler ABI info - done
>
> -- Detecting CXX compile features
>
> -- Detecting CXX compile features - done
>
> -- Using Release VC++ CRT: MD
>
> -- Looking for os_signpost_interval_begin
>
> -- Looking for os_signpost_interval_begin - not found
>
> -- Looking for fopen in c
>
> -- Looking for fopen in c - not found
>
> -- Looking for __gcc_personality_v0 in gcc_s
>
> -- Looking for __gcc_personality_v0 in gcc_s - not found
>
> -- Looking for __absvdi2 in gcc
>
> -- Looking for __absvdi2 in gcc - not found
>
> -- Performing Test LIBUNWIND_HAS_NODEFAULTLIBS_FLAG
>
> -- Performing Test LIBUNWIND_HAS_NODEFAULTLIBS_FLAG - Failed
>
> -- Performing Test LIBUNWIND_HAS_NOSTDINCXX_FLAG
>
> -- Performing Test LIBUNWIND_HAS_NOSTDINCXX_FLAG - Failed
>
> -- Looking for __arm__
>
> -- Looking for __arm__ - not found
>
> -- Looking for __USING_SJLJ_EXCEPTIONS__
>
> -- Looking for __USING_SJLJ_EXCEPTIONS__ - not found
>
> -- Looking for __ARM_DWARF_EH__
>
> -- Looking for __ARM_DWARF_EH__ - not found
>
> -- Looking for dladdr in dl
>
> -- Looking for dladdr in dl - not found
>
> -- Looking for pthread_once in pthread
>
> -- Looking for pthread_once in pthread - not found
>
> -- Performing Test LIBUNWIND_SUPPORTS_WERROR_EQ_RETURN_TYPE_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WERROR_EQ_RETURN_TYPE_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_W_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_W_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_WALL_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WALL_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WCHAR_SUBSCRIPTS_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WCHAR_SUBSCRIPTS_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_WCONVERSION_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WCONVERSION_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_WMISMATCHED_TAGS_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WMISMATCHED_TAGS_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_WMISSING_BRACES_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WMISSING_BRACES_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_WNEWLINE_EOF_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WNEWLINE_EOF_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_WNO_UNUSED_FUNCTION_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WNO_UNUSED_FUNCTION_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSHADOW_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSHADOW_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSHORTEN_64_TO_32_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSHORTEN_64_TO_32_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSIGN_COMPARE_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSIGN_COMPARE_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSIGN_CONVERSION_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSIGN_CONVERSION_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSTRICT_ALIASING_EQ_2_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSTRICT_ALIASING_EQ_2_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSTRICT_OVERFLOW_EQ_4_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSTRICT_OVERFLOW_EQ_4_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_WUNUSED_PARAMETER_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WUNUSED_PARAMETER_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_WUNUSED_VARIABLE_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WUNUSED_VARIABLE_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_WWRITE_STRINGS_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WWRITE_STRINGS_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_WUNDEF_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WUNDEF_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_WNO_ERROR_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WNO_ERROR_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_WX_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WX_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_PEDANTIC_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_PEDANTIC_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_FSTRICT_ALIASING_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_FSTRICT_ALIASING_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_EHSC_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_EHSC_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_FUNWIND_TABLES_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_FUNWIND_TABLES_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_FNO_EXCEPTIONS_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_FNO_EXCEPTIONS_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_FNO_RTTI_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_FNO_RTTI_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_NODEFAULTLIBS_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_NODEFAULTLIBS_FLAG - Failed
>
> CMake Error at src/CMakeLists.txt:86 (message):
>
> Compiler doesn't support generation of unwind tables if exception support
>
> is disabled. Building libunwind DSO with runtime dependency on C++ ABI
>
> library is not supported.
>
>
>
>
>
> -- Configuring incomplete, errors occurred!
>
> See also "C:/Users/clang/libunwind2/CMakeFiles/CMakeOutput.log".
>
> See also "C:/Users/clang/libunwind2/CMakeFiles/CMakeError.log".
>
>
>
> So I am attaching these logs.
>
>
>
> I tried to compile using Clang.
>
> I have configured libunwind:
>
>
>
> >cmake -G Ninja -DLLVM_PATH="C:/Users/clang/llvm-project-10.0.1/llvm"
> -DCMAKE_BUILD_TYPE=Release
> -DCMAKE_INSTALL_PREFIX="C:\Users\clang\libunwind_llvm"
> -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ ../libunwind
>
> -- The C compiler identification is Clang 10.0.0 with GNU-like command-line
>
> -- The CXX compiler identification is Clang 10.0.0 with GNU-like
> command-line
>
> -- Check for working C compiler: C:/Program Files/LLVM/bin/clang.exe
>
> -- Check for working C compiler: C:/Program Files/LLVM/bin/clang.exe --
> works
>
> -- Detecting C compiler ABI info
>
> -- Detecting C compiler ABI info - done
>
> -- Detecting C compile features
>
> -- Detecting C compile features - done
>
> -- Check for working CXX compiler: C:/Program Files/LLVM/bin/clang++.exe
>
> -- Check for working CXX compiler: C:/Program Files/LLVM/bin/clang++.exe
> -- works
>
> -- Detecting CXX compiler ABI info
>
> -- Detecting CXX compiler ABI info - done
>
> -- Detecting CXX compile features
>
> -- Detecting CXX compile features - done
>
> -- Performing Test C_SUPPORTS_WERROR_DATE_TIME
>
> -- Performing Test C_SUPPORTS_WERROR_DATE_TIME - Success
>
> -- Performing Test CXX_SUPPORTS_WERROR_DATE_TIME
>
> -- Performing Test CXX_SUPPORTS_WERROR_DATE_TIME - Success
>
> -- Performing Test C_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW
>
> -- Performing Test C_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW - Success
>
> -- Performing Test CXX_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW
>
> -- Performing Test CXX_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW - Success
>
> -- Performing Test CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG
>
> -- Performing Test CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG - Success
>
> -- Performing Test C_SUPPORTS_IMPLICIT_FALLTHROUGH_FLAG
>
> -- Performing Test C_SUPPORTS_IMPLICIT_FALLTHROUGH_FLAG - Success
>
> -- Performing Test CXX_SUPPORTS_IMPLICIT_FALLTHROUGH_FLAG
>
> -- Performing Test CXX_SUPPORTS_IMPLICIT_FALLTHROUGH_FLAG - Success
>
> -- Performing Test C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG
>
> -- Performing Test C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG - Success
>
> -- Performing Test CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG
>
> -- Performing Test CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG - Success
>
> -- Performing Test CXX_SUPPORTS_CLASS_MEMACCESS_FLAG
>
> -- Performing Test CXX_SUPPORTS_CLASS_MEMACCESS_FLAG - Failed
>
> -- Performing Test CXX_SUPPORTS_NOEXCEPT_TYPE_FLAG
>
> -- Performing Test CXX_SUPPORTS_NOEXCEPT_TYPE_FLAG - Success
>
> -- Performing Test C_SUPPORTS_DELETE_NON_VIRTUAL_DTOR_FLAG
>
> -- Performing Test C_SUPPORTS_DELETE_NON_VIRTUAL_DTOR_FLAG - Success
>
> -- Performing Test CXX_SUPPORTS_DELETE_NON_VIRTUAL_DTOR_FLAG
>
> -- Performing Test CXX_SUPPORTS_DELETE_NON_VIRTUAL_DTOR_FLAG - Success
>
> -- Performing Test C_WCOMMENT_ALLOWS_LINE_WRAP
>
> -- Performing Test C_WCOMMENT_ALLOWS_LINE_WRAP - Success
>
> -- Performing Test C_SUPPORTS_STRING_CONVERSION_FLAG
>
> -- Performing Test C_SUPPORTS_STRING_CONVERSION_FLAG - Success
>
> -- Performing Test CXX_SUPPORTS_STRING_CONVERSION_FLAG
>
> -- Performing Test CXX_SUPPORTS_STRING_CONVERSION_FLAG - Success
>
> -- Looking for os_signpost_interval_begin
>
> -- Looking for os_signpost_interval_begin - not found
>
> -- Looking for fopen in c
>
> -- Looking for fopen in c - not found
>
> -- Looking for __gcc_personality_v0 in gcc_s
>
> -- Looking for __gcc_personality_v0 in gcc_s - not found
>
> -- Looking for __absvdi2 in gcc
>
> -- Looking for __absvdi2 in gcc - not found
>
> -- Performing Test LIBUNWIND_HAS_NODEFAULTLIBS_FLAG
>
> -- Performing Test LIBUNWIND_HAS_NODEFAULTLIBS_FLAG - Success
>
> -- Performing Test LIBUNWIND_HAS_COMMENT_LIB_PRAGMA
>
> -- Performing Test LIBUNWIND_HAS_COMMENT_LIB_PRAGMA - Failed
>
> -- Performing Test LIBUNWIND_HAS_NOSTDINCXX_FLAG
>
> -- Performing Test LIBUNWIND_HAS_NOSTDINCXX_FLAG - Success
>
> -- Looking for __arm__
>
> -- Looking for __arm__ - not found
>
> -- Looking for __USING_SJLJ_EXCEPTIONS__
>
> -- Looking for __USING_SJLJ_EXCEPTIONS__ - not found
>
> -- Looking for __ARM_DWARF_EH__
>
> -- Looking for __ARM_DWARF_EH__ - not found
>
> -- Looking for dladdr in dl
>
> -- Looking for dladdr in dl - not found
>
> -- Looking for pthread_once in pthread
>
> -- Looking for pthread_once in pthread - not found
>
> -- Performing Test LIBUNWIND_SUPPORTS_WERROR_EQ_RETURN_TYPE_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WERROR_EQ_RETURN_TYPE_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_W_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_W_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WALL_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WALL_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WCHAR_SUBSCRIPTS_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WCHAR_SUBSCRIPTS_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WCONVERSION_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WCONVERSION_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WMISMATCHED_TAGS_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WMISMATCHED_TAGS_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WMISSING_BRACES_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WMISSING_BRACES_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WNEWLINE_EOF_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WNEWLINE_EOF_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WNO_UNUSED_FUNCTION_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WNO_UNUSED_FUNCTION_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSHADOW_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSHADOW_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSHORTEN_64_TO_32_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSHORTEN_64_TO_32_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSIGN_COMPARE_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSIGN_COMPARE_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSIGN_CONVERSION_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSIGN_CONVERSION_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSTRICT_ALIASING_EQ_2_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSTRICT_ALIASING_EQ_2_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSTRICT_OVERFLOW_EQ_4_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WSTRICT_OVERFLOW_EQ_4_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WUNUSED_PARAMETER_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WUNUSED_PARAMETER_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WUNUSED_VARIABLE_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WUNUSED_VARIABLE_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WWRITE_STRINGS_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WWRITE_STRINGS_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WUNDEF_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WUNDEF_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WNO_ERROR_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WNO_ERROR_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_WX_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_WX_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_PEDANTIC_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_PEDANTIC_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_FSTRICT_ALIASING_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_FSTRICT_ALIASING_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_EHSC_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_EHSC_FLAG - Failed
>
> -- Performing Test LIBUNWIND_SUPPORTS_FUNWIND_TABLES_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_FUNWIND_TABLES_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_FNO_EXCEPTIONS_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_FNO_EXCEPTIONS_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_FNO_RTTI_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_FNO_RTTI_FLAG - Success
>
> -- Performing Test LIBUNWIND_SUPPORTS_NODEFAULTLIBS_FLAG
>
> -- Performing Test LIBUNWIND_SUPPORTS_NODEFAULTLIBS_FLAG - Success
>
> -- Configuring done
>
> -- Generating done
>
> -- Build files have been written to: C:/Users/clang/libunwind2
>
>
>
> Then I tried to build it:
>
>
>
> >ninja -w dupbuild=warn
>
> ninja: warning: multiple rules generate lib/unwind.lib. builds involving
> this target will not be correct; continuing anyway [-w dupbuild=warn]
>
> [4/9] Building C object src/CMakeFiles/unwind_shared.dir/Unwind-sjlj.c.obj
>
> In file included from C:/Users/clang/libunwind/src/Unwind-sjlj.c:19:
>
> C:/Users/clang/libunwind/src/config.h:26:11: warning: keyword is hidden by
> macro definition [-Wkeyword-macro]
>
> #define static_assert(__b, __m) \
>
> ^
>
> 1 warning generated.
>
> [5/9] Building C object src/CMakeFiles/unwind_shared.dir/UnwindLevel1.c.obj
>
> In file included from C:/Users/clang/libunwind/src/UnwindLevel1.c:28:
>
> C:/Users/clang/libunwind/src/config.h:26:11: warning: keyword is hidden by
> macro definition [-Wkeyword-macro]
>
> #define static_assert(__b, __m) \
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1.c:350:1: warning: redeclaration
> of '_Unwind_RaiseException' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _Unwind_RaiseException(_Unwind_Exception *exception_object) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:174:5: note: previous
> declaration is here
>
> _Unwind_RaiseException(_Unwind_Exception *exception_object);
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1.c:385:1: warning: redeclaration
> of '_Unwind_Resume' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _Unwind_Resume(_Unwind_Exception *exception_object) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:175:13: note: previous
> declaration is here
>
> extern void _Unwind_Resume(_Unwind_Exception *exception_object);
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1.c:408:1: warning: redeclaration
> of '_Unwind_ForcedUnwind' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _Unwind_ForcedUnwind(_Unwind_Exception *exception_object,
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:277:5: note: previous
> declaration is here
>
> _Unwind_ForcedUnwind(_Unwind_Exception *exception_object,
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1.c:428:1: warning: redeclaration
> of '_Unwind_GetLanguageSpecificData' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _Unwind_GetLanguageSpecificData(struct _Unwind_Context *context) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:270:5: note: previous
> declaration is here
>
> _Unwind_GetLanguageSpecificData(struct _Unwind_Context *context);
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1.c:449:1: warning: redeclaration
> of '_Unwind_GetRegionStart' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _Unwind_GetRegionStart(struct _Unwind_Context *context) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:268:18: note: previous
> declaration is here
>
> extern uintptr_t _Unwind_GetRegionStart(struct _Unwind_Context *context);
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1.c:465:1: warning: redeclaration
> of '_Unwind_DeleteException' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _Unwind_DeleteException(_Unwind_Exception *exception_object) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:177:13: note: previous
> declaration is here
>
> extern void _Unwind_DeleteException(_Unwind_Exception *exception_object);
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1.c:475:1: warning: redeclaration
> of '_Unwind_GetGR' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _Unwind_GetGR(struct _Unwind_Context *context, int index) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:221:18: note: previous
> declaration is here
>
> extern uintptr_t _Unwind_GetGR(struct _Unwind_Context *context, int index);
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1.c:485:24: warning: redeclaration
> of '_Unwind_SetGR' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_EXPORT void _Unwind_SetGR(struct _Unwind_Context *context, int
> index,
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:222:13: note: previous
> declaration is here
>
> extern void _Unwind_SetGR(struct _Unwind_Context *context, int index,
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1.c:495:29: warning: redeclaration
> of '_Unwind_GetIP' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_EXPORT uintptr_t _Unwind_GetIP(struct _Unwind_Context *context)
> {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:224:18: note: previous
> declaration is here
>
> extern uintptr_t _Unwind_GetIP(struct _Unwind_Context *context);
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1.c:507:24: warning: redeclaration
> of '_Unwind_SetIP' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_EXPORT void _Unwind_SetIP(struct _Unwind_Context *context,
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:225:13: note: previous
> declaration is here
>
> extern void _Unwind_SetIP(struct _Unwind_Context *, uintptr_t new_value);
>
> ^
>
> 11 warnings generated.
>
> [6/9] Building C object
> src/CMakeFiles/unwind_shared.dir/UnwindLevel1-gcc-ext.c.obj
>
> In file included from
> C:/Users/clang/libunwind/src/UnwindLevel1-gcc-ext.c:19:
>
> C:/Users/clang/libunwind/src/config.h:26:11: warning: keyword is hidden by
> macro definition [-Wkeyword-macro]
>
> #define static_assert(__b, __m) \
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1-gcc-ext.c:33:1: warning:
> redeclaration of '_Unwind_Resume_or_Rethrow' should not add 'dllexport'
> attribute [-Wdll-attribute-on-redeclaration]
>
> _Unwind_Resume_or_Rethrow(_Unwind_Exception *exception_object) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:299:5: note: previous
> declaration is here
>
> _Unwind_Resume_or_Rethrow(_Unwind_Exception *exception_object);
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1-gcc-ext.c:70:1: warning:
> redeclaration of '_Unwind_GetDataRelBase' should not add 'dllexport'
> attribute [-Wdll-attribute-on-redeclaration]
>
> _Unwind_GetDataRelBase(struct _Unwind_Context *context) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:356:18: note: previous
> declaration is here
>
> extern uintptr_t _Unwind_GetDataRelBase(struct _Unwind_Context *context)
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1-gcc-ext.c:80:1: warning:
> redeclaration of '_Unwind_GetTextRelBase' should not add 'dllexport'
> attribute [-Wdll-attribute-on-redeclaration]
>
> _Unwind_GetTextRelBase(struct _Unwind_Context *context) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:358:18: note: previous
> declaration is here
>
> extern uintptr_t _Unwind_GetTextRelBase(struct _Unwind_Context *context)
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1-gcc-ext.c:89:25: warning:
> redeclaration of '_Unwind_FindEnclosingFunction' should not add 'dllexport'
> attribute [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_EXPORT void *_Unwind_FindEnclosingFunction(void *pc) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:352:14: note: previous
> declaration is here
>
> extern void *_Unwind_FindEnclosingFunction(void *pc);
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1-gcc-ext.c:108:1: warning:
> redeclaration of '_Unwind_Backtrace' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _Unwind_Backtrace(_Unwind_Trace_Fn callback, void *ref) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:307:28: note: previous
> declaration is here
>
> extern _Unwind_Reason_Code _Unwind_Backtrace(_Unwind_Trace_Fn, void *);
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1-gcc-ext.c:187:31: warning:
> redeclaration of '_Unwind_Find_FDE' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_EXPORT const void *_Unwind_Find_FDE(const void *pc,
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:344:20: note: previous
> declaration is here
>
> extern const void *_Unwind_Find_FDE(const void *pc, struct dwarf_eh_bases
> *);
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1-gcc-ext.c:208:29: warning:
> redeclaration of '_Unwind_GetCFA' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_EXPORT uintptr_t _Unwind_GetCFA(struct _Unwind_Context
> *context) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:312:18: note: previous
> declaration is here
>
> extern uintptr_t _Unwind_GetCFA(struct _Unwind_Context *);
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1-gcc-ext.c:221:29: warning:
> redeclaration of '_Unwind_GetIPInfo' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_EXPORT uintptr_t _Unwind_GetIPInfo(struct _Unwind_Context
> *context,
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:321:18: note: previous
> declaration is here
>
> extern uintptr_t _Unwind_GetIPInfo(struct _Unwind_Context *context,
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1-gcc-ext.c:241:24: warning:
> redeclaration of '__register_frame' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_EXPORT void __register_frame(const void *fde) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:331:13: note: previous
> declaration is here
>
> extern void __register_frame(const void *fde);
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1-gcc-ext.c:251:24: warning:
> redeclaration of '__deregister_frame' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_EXPORT void __deregister_frame(const void *fde) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:332:13: note: previous
> declaration is here
>
> extern void __deregister_frame(const void *fde);
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1-gcc-ext.c:266:24: warning:
> redeclaration of '__register_frame_info_bases' should not add 'dllexport'
> attribute [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_EXPORT void __register_frame_info_bases(const void *fde, void
> *ob,
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:364:13: note: previous
> declaration is here
>
> extern void __register_frame_info_bases(const void *fde, void *ob, void
> *tb,
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1-gcc-ext.c:277:24: warning:
> redeclaration of '__register_frame_info' should not add 'dllexport'
> attribute [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_EXPORT void __register_frame_info(const void *fde, void *ob) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:366:13: note: previous
> declaration is here
>
> extern void __register_frame_info(const void *fde, void *ob)
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1-gcc-ext.c:284:24: warning:
> redeclaration of '__register_frame_info_table_bases' should not add
> 'dllexport' attribute [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_EXPORT void __register_frame_info_table_bases(const void *fde,
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:368:13: note: previous
> declaration is here
>
> extern void __register_frame_info_table_bases(const void *fde, void *ob,
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1-gcc-ext.c:296:24: warning:
> redeclaration of '__register_frame_info_table' should not add 'dllexport'
> attribute [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_EXPORT void __register_frame_info_table(const void *fde, void
> *ob) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:371:13: note: previous
> declaration is here
>
> extern void __register_frame_info_table(const void *fde, void *ob)
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1-gcc-ext.c:303:24: warning:
> redeclaration of '__register_frame_table' should not add 'dllexport'
> attribute [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_EXPORT void __register_frame_table(const void *fde) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:373:13: note: previous
> declaration is here
>
> extern void __register_frame_table(const void *fde)
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1-gcc-ext.c:309:25: warning:
> redeclaration of '__deregister_frame_info' should not add 'dllexport'
> attribute [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_EXPORT void *__deregister_frame_info(const void *fde) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:375:14: note: previous
> declaration is here
>
> extern void *__deregister_frame_info(const void *fde)
>
> ^
>
> C:/Users/clang/libunwind/src/UnwindLevel1-gcc-ext.c:316:25: warning:
> redeclaration of '__deregister_frame_info_bases' should not add 'dllexport'
> attribute [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_EXPORT void *__deregister_frame_info_bases(const void *fde) {
>
> ^
>
> C:/Users/clang/libunwind/include\unwind.h:377:14: note: previous
> declaration is here
>
> extern void *__deregister_frame_info_bases(const void *fde)
>
> ^
>
> 18 warnings generated.
>
> [8/9] Building CXX object
> src/CMakeFiles/unwind_shared.dir/libunwind.cpp.obj
>
> In file included from C:/Users/clang/libunwind/src/libunwind.cpp:22:
>
> In file included from C:/Users/clang/libunwind/src/UnwindCursor.hpp:67:
>
> In file included from C:/Users/clang/libunwind/src/CompactUnwinder.hpp:19:
>
> C:/Users/clang/libunwind/include\mach-o/compact_unwind_encoding.h:45:5:
> warning: enumerator value is not representable in the underlying type 'int'
> [-Wmicrosoft-enum-value]
>
> UNWIND_IS_NOT_FUNCTION_START = 0x80000000,
>
> ^
>
> C:/Users/clang/libunwind/src/libunwind.cpp:29:36: warning: redeclaration
> of 'unw_local_addr_space' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_EXPORT unw_addr_space_t unw_local_addr_space =
>
> ^
>
> C:/Users/clang/libunwind/include\libunwind.h:125:25: note: previous
> declaration is here
>
> extern unw_addr_space_t unw_local_addr_space;
>
> ^
>
> C:/Users/clang/libunwind/src/libunwind.cpp:76:41: warning: redeclaration
> of 'unw_init_local' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_WEAK_ALIAS(__unw_init_local, unw_init_local)
>
> ^
>
> C:/Users/clang/libunwind/include\libunwind.h:104:12: note: previous
> declaration is here
>
> extern int unw_init_local(unw_cursor_t *, unw_context_t *) LIBUNWIND_AVAIL;
>
> ^
>
> C:/Users/clang/libunwind/src/libunwind.cpp:91:38: warning: redeclaration
> of 'unw_get_reg' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_WEAK_ALIAS(__unw_get_reg, unw_get_reg)
>
> ^
>
> C:/Users/clang/libunwind/include\libunwind.h:106:12: note: previous
> declaration is here
>
> extern int unw_get_reg(unw_cursor_t *, unw_regnum_t, unw_word_t *)
> LIBUNWIND_AVAIL;
>
> ^
>
> C:/Users/clang/libunwind/src/libunwind.cpp:123:38: warning: redeclaration
> of 'unw_set_reg' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_WEAK_ALIAS(__unw_set_reg, unw_set_reg)
>
> ^
>
> C:/Users/clang/libunwind/include\libunwind.h:108:12: note: previous
> declaration is here
>
> extern int unw_set_reg(unw_cursor_t *, unw_regnum_t, unw_word_t)
> LIBUNWIND_AVAIL;
>
> ^
>
> C:/Users/clang/libunwind/src/libunwind.cpp:138:40: warning: redeclaration
> of 'unw_get_fpreg' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_WEAK_ALIAS(__unw_get_fpreg, unw_get_fpreg)
>
> ^
>
> C:/Users/clang/libunwind/include\libunwind.h:107:12: note: previous
> declaration is here
>
> extern int unw_get_fpreg(unw_cursor_t *, unw_regnum_t, unw_fpreg_t *)
> LIBUNWIND_AVAIL;
>
> ^
>
> C:/Users/clang/libunwind/src/libunwind.cpp:157:40: warning: redeclaration
> of 'unw_set_fpreg' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_WEAK_ALIAS(__unw_set_fpreg, unw_set_fpreg)
>
> ^
>
> C:/Users/clang/libunwind/include\libunwind.h:109:12: note: previous
> declaration is here
>
> extern int unw_set_fpreg(unw_cursor_t *, unw_regnum_t, unw_fpreg_t)
> LIBUNWIND_AVAIL;
>
> ^
>
> C:/Users/clang/libunwind/src/libunwind.cpp:165:35: warning: redeclaration
> of 'unw_step' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_WEAK_ALIAS(__unw_step, unw_step)
>
> ^
>
> C:/Users/clang/libunwind/include\libunwind.h:105:12: note: previous
> declaration is here
>
> extern int unw_step(unw_cursor_t *) LIBUNWIND_AVAIL;
>
> ^
>
> C:/Users/clang/libunwind/src/libunwind.cpp:178:44: warning: redeclaration
> of 'unw_get_proc_info' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_WEAK_ALIAS(__unw_get_proc_info, unw_get_proc_info)
>
> ^
>
> C:/Users/clang/libunwind/include\libunwind.h:119:12: note: previous
> declaration is here
>
> extern int unw_get_proc_info(unw_cursor_t *, unw_proc_info_t *)
> LIBUNWIND_AVAIL;
>
> ^
>
> C:/Users/clang/libunwind/src/libunwind.cpp:187:37: warning: redeclaration
> of 'unw_resume' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_WEAK_ALIAS(__unw_resume, unw_resume)
>
> ^
>
> C:/Users/clang/libunwind/include\libunwind.h:110:12: note: previous
> declaration is here
>
> extern int unw_resume(unw_cursor_t *) LIBUNWIND_AVAIL;
>
> ^
>
> C:/Users/clang/libunwind/src/libunwind.cpp:200:44: warning: redeclaration
> of 'unw_get_proc_name' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_WEAK_ALIAS(__unw_get_proc_name, unw_get_proc_name)
>
> ^
>
> C:/Users/clang/libunwind/include\libunwind.h:122:12: note: previous
> declaration is here
>
> extern int unw_get_proc_name(unw_cursor_t *, char *, size_t, unw_word_t *)
> LIBUNWIND_AVAIL;
>
> ^
>
> C:/Users/clang/libunwind/src/libunwind.cpp:210:39: warning: redeclaration
> of 'unw_is_fpreg' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_WEAK_ALIAS(__unw_is_fpreg, unw_is_fpreg)
>
> ^
>
> C:/Users/clang/libunwind/include\libunwind.h:120:12: note: previous
> declaration is here
>
> extern int unw_is_fpreg(unw_cursor_t *, unw_regnum_t) LIBUNWIND_AVAIL;
>
> ^
>
> C:/Users/clang/libunwind/src/libunwind.cpp:220:38: warning: redeclaration
> of 'unw_regname' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_WEAK_ALIAS(__unw_regname, unw_regname)
>
> ^
>
> C:/Users/clang/libunwind/include\libunwind.h:118:20: note: previous
> declaration is here
>
> extern const char *unw_regname(unw_cursor_t *, unw_regnum_t)
> LIBUNWIND_AVAIL;
>
> ^
>
> C:/Users/clang/libunwind/src/libunwind.cpp:229:46: warning: redeclaration
> of 'unw_is_signal_frame' should not add 'dllexport' attribute
> [-Wdll-attribute-on-redeclaration]
>
> _LIBUNWIND_WEAK_ALIAS(__unw_is_signal_frame, unw_is_signal_frame)
>
> ^
>
> C:/Users/clang/libunwind/include\libunwind.h:121:12: note: previous
> declaration is here
>
> extern int unw_is_signal_frame(unw_cursor_t *) LIBUNWIND_AVAIL;
>
> ^
>
> C:/Users/clang/libunwind/src/libunwind.cpp:293:12: warning: 'getenv' is
> deprecated: This function or variable may be unsafe. Consider using
> _dupenv_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See
> online help for details. [-Wdeprecated-declarations]
>
> log = (getenv("LIBUNWIND_PRINT_APIS") != NULL);
>
> ^
>
> C:\Program Files\Windows
> Kits\10\include\10.0.18362.0\ucrt\stdlib.h:1190:20: note: 'getenv' has been
> explicitly marked deprecated here
>
> _Check_return_ _CRT_INSECURE_DEPRECATE(_dupenv_s)
>
> ^
>
> C:\Program Files\Microsoft Visual
> Studio\2019\Preview\VC\Tools\MSVC\14.27.29109\include\vcruntime.h:320:55:
> note: expanded from macro '_CRT_INSECURE_DEPRECATE'
>
> #define _CRT_INSECURE_DEPRECATE(_Replacement)
> _CRT_DEPRECATE_TEXT( \
>
> ^
>
> C:\Program Files\Microsoft Visual
> Studio\2019\Preview\VC\Tools\MSVC\14.27.29109\include\vcruntime.h:310:47:
> note: expanded from macro '_CRT_DEPRECATE_TEXT'
>
> #define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
>
> ^
>
> C:/Users/clang/libunwind/src/libunwind.cpp:305:12: warning: 'getenv' is
> deprecated: This function or variable may be unsafe. Consider using
> _dupenv_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See
> online help for details. [-Wdeprecated-declarations]
>
> log = (getenv("LIBUNWIND_PRINT_UNWINDING") != NULL);
>
> ^
>
> C:\Program Files\Windows
> Kits\10\include\10.0.18362.0\ucrt\stdlib.h:1190:20: note: 'getenv' has been
> explicitly marked deprecated here
>
> _Check_return_ _CRT_INSECURE_DEPRECATE(_dupenv_s)
>
> ^
>
> C:\Program Files\Microsoft Visual
> Studio\2019\Preview\VC\Tools\MSVC\14.27.29109\include\vcruntime.h:320:55:
> note: expanded from macro '_CRT_INSECURE_DEPRECATE'
>
> #define _CRT_INSECURE_DEPRECATE(_Replacement)
> _CRT_DEPRECATE_TEXT( \
>
> ^
>
> C:\Program Files\Microsoft Visual
> Studio\2019\Preview\VC\Tools\MSVC\14.27.29109\include\vcruntime.h:310:47:
> note: expanded from macro '_CRT_DEPRECATE_TEXT'
>
> #define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
>
> ^
>
> C:/Users/clang/libunwind/src/libunwind.cpp:317:12: warning: 'getenv' is
> deprecated: This function or variable may be unsafe. Consider using
> _dupenv_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See
> online help for details. [-Wdeprecated-declarations]
>
> log = (getenv("LIBUNWIND_PRINT_DWARF") != NULL);
>
> ^
>
> C:\Program Files\Windows
> Kits\10\include\10.0.18362.0\ucrt\stdlib.h:1190:20: note: 'getenv' has been
> explicitly marked deprecated here
>
> _Check_return_ _CRT_INSECURE_DEPRECATE(_dupenv_s)
>
> ^
>
> C:\Program Files\Microsoft Visual
> Studio\2019\Preview\VC\Tools\MSVC\14.27.29109\include\vcruntime.h:320:55:
> note: expanded from macro '_CRT_INSECURE_DEPRECATE'
>
> #define _CRT_INSECURE_DEPRECATE(_Replacement)
> _CRT_DEPRECATE_TEXT( \
>
> ^
>
> C:\Program Files\Microsoft Visual
> Studio\2019\Preview\VC\Tools\MSVC\14.27.29109\include\vcruntime.h:310:47:
> note: expanded from macro '_CRT_DEPRECATE_TEXT'
>
> #define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
>
> ^
>
> 17 warnings generated.
>
> [9/9] Linking C shared library lib\unwind.dll
>
> FAILED: lib/unwind.dll lib/unwind.lib
>
> cmd.exe /C "cd . && C:\PROGRA~1\LLVM\bin\clang.exe -nostartfiles
> -nostdlib -Werror=date-time -Werror=unguarded-availability-new -Wextra
> -Wno-unused-parameter -Wwrite-strings -Wmissing-field-initializers
> -Wimplicit-fallthrough -Wcovered-switch-default -Wdelete-non-virtual-dtor
> -Wstring-conversion -O3 -DNDEBUG -D_DLL -D_MT -Xclang
> --dependent-lib=msvcrt -nodefaultlibs -shared -o lib\unwind.dll -Xlinker
> /implib:lib\unwind.lib -Xlinker /pdb:lib\unwind.pdb -Xlinker /version:1.0
> src/CMakeFiles/unwind_shared.dir/libunwind.cpp.obj
> src/CMakeFiles/unwind_shared.dir/Unwind-EHABI.cpp.obj
> src/CMakeFiles/unwind_shared.dir/Unwind-seh.cpp.obj
> src/CMakeFiles/unwind_shared.dir/UnwindLevel1.c.obj
> src/CMakeFiles/unwind_shared.dir/UnwindLevel1-gcc-ext.c.obj
> src/CMakeFiles/unwind_shared.dir/Unwind-sjlj.c.obj
> src/CMakeFiles/unwind_shared.dir/UnwindRegistersRestore.S.obj
> src/CMakeFiles/unwind_shared.dir/UnwindRegistersSave.S.obj -lkernel32
> -luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32
> -ladvapi32 -loldnames && cd ."
>
> Creating library lib\unwind.lib and object lib\unwind.exp
>
> libunwind.cpp.obj :
>
> error LNK2019: *unresolved external symbol "public: void __thiscall
> libunwind::Registers_x86::jumpto(void)"
> (?jumpto at Registers_x86@libunwind@@QAEXXZ) referenced in function "public:
> virtual void __thiscall libunwind::UnwindCursor<class
> libunwind::LocalAddressSpace,class libunwind::Registers_x86*>::jumpto(void)"
> (?jumpto@?$UnwindCursor at VLocalAddressSpace@libunwind@@VRegisters_x86 at 2
> @@libunwind@@UAEXXZ)
>
> lib\unwind.dll : fatal error LNK1120: 1 unresolved externals
>
> clang: error: linker command failed with exit code 1120 (use -v to see
> invocation)
>
> ninja: build stopped: subcommand failed.
>
>
>
> So there were some linking issues.
>
> Some assistance would be much appreciated.
>
>
>
> Microsoft's linker has it's version 14.27.29109.0 (VS 2019).
>
> Clang's version is clang version 10.0.0 (Target: i686-pc-windows-msvc)
>
> Ninja's version is 1.10.0.git.kitware.jobserver-1
>
>
>
> Ivan
>
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