[swift-users] Compile error trying to follow Swift for Windows MSVC instructions

[Michael Gottesman]

+CC Compnerd

> On Nov 9, 2017, at 10:36 AM, Eric Wing via swift-users <swift-users at swift.org> wrote:
> 
> I'm trying to build Swift for Windows with Visual Studio using the
> directions found here:
> https://github.com/apple/swift/blob/master/docs/Windows.md
> 
> I'm following the MSVC section for directions. I am stuck in step 6.
> LLVM/Clang/Compiler-RT
> 
> I seem to be hitting a C++ error in the code in IndexDataStore.h. Any
> ideas on how to get around this?
> 
> 
> C:\PROGRA~2\MICROS~1\2017\COMMUN~1\VC\Tools\MSVC\1411~1.255\bin\Hostx64\x64\cl.exe
> /nologo /TP -DGTEST_HAS_RTTI=0 -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE
> -D_CRT_NONSTDC_NO_WARNINGS -D_CRT_SECURE_NO_DEPRECATE
> -D_CRT_SECURE_NO_WARNINGS -D_GNU_SOURCE -D_HAS_EXCEPTIONS=0
> -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE
> -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
> -Itools\clang\lib\Index -IC:\Source\SWIFT\llvm\tools\clang\lib\Index
> -IC:\Source\SWIFT\llvm\tools\clang\include -Itools\clang\include
> -Iinclude -IC:\Source\SWIFT\llvm\include /DWIN32 /D_WINDOWS
> /Zc:inline /Zc:strictStrings /Oi /Zc:rvalueCast /W4 -wd4141 -wd4146
> -wd4180 -wd4244 -wd4258 -wd4267 -wd4291 -wd4345 -wd4351 -wd4355
> -wd4456 -wd4457 -wd4458 -wd4459 -wd4503 -wd4624 -wd4722 -wd4800
> -wd4100 -wd4127 -wd4512 -wd4505 -wd4610 -wd4510 -wd4702 -wd4245
> -wd4706 -wd4310 -wd4701 -wd4703 -wd4389 -wd4611 -wd4805 -wd4204
> -wd4577 -wd4091 -wd4592 -wd4319 -wd4324 -w14062 -we4238 /MD /O1 /Ob1
> -UNDEBUG  /EHs-c- /GR- /showIncludes
> /Fotools\clang\lib\Index\CMakeFiles\clangIndex.dir\IndexDataStore.cpp.obj
> /Fdtools\clang\lib\Index\CMakeFiles\clangIndex.dir\clangIndex.pdb /FS
> -c C:\Source\SWIFT\llvm\tools\clang\lib\Index\IndexDataStore.cpp
> C:\Source\SWIFT\llvm\tools\clang\include\clang/Index/IndexDataStore.h(41):
> error C3646: 'ModTime': unknown override specifier
> C:\Source\SWIFT\llvm\tools\clang\include\clang/Index/IndexDataStore.h(41):
> error C4430: missing type specifier - int assumed. Note: C++ does not
> support default-int
> C:\Source\SWIFT\llvm\tools\clang\include\clang/Index/IndexDataStore.h(74):
> error C3646: 'ModTime': unknown override specifier
> C:\Source\SWIFT\llvm\tools\clang\include\clang/Index/IndexDataStore.h(74):
> error C4430: missing type specifier - int assumed. Note: C++ does not
> support default-int
> C:\Source\SWIFT\llvm\tools\clang\lib\Index\IndexDataStore.cpp(164):
> error C2039: 'ModTime': is not a member of
> 'clang::index::AbstractDirectoryWatcher::Event'
> C:\Source\SWIFT\llvm\tools\clang\include\clang/Index/IndexDataStore.h(38):
> note: see declaration of
> 'clang::index::AbstractDirectoryWatcher::Event'
> C:\Source\SWIFT\llvm\tools\clang\lib\Index\IndexDataStore.cpp(164):
> error C2039: '__this': is not a member of
> 'clang::index::AbstractDirectoryWatcher::Event'
> C:\Source\SWIFT\llvm\tools\clang\include\clang/Index/IndexDataStore.h(38):
> note: see declaration of
> 'clang::index::AbstractDirectoryWatcher::Event'
> [2723/3603] Building CXX object
> tools\clang\lib\Index\CMakeFiles\clangIndex.dir\IndexingContext.cpp.obj
> ninja: build stopped: subcommand failed.
> 
> 
> Note: I'm using VS2017 instead of VS2015 because it's supposed to have
> better C++ conformance.
> 
> I also want to note, building Debug hits a different fatal error where
> MSVC aborts saying you must compile with /bigobj because the files are
> too large. I changed my build and then hit the above compile error
> with IndexDataStore.h. I then tried building a release version without
> /bigobj, but I hit the same compile error with IndexDataStore.h.
> 
> 
> 
> 
> 
> Also, can somebody clarify what the differences are between the
> different build approaches in the document (clang vs. MSVC vs.
> clang-cl). Will these all produce binaries that are interoperable with
> each other and allow me to link against regular MSVC built C
> libraries? And do one of these clang options need MSVC's clang-C2?
> 
> And also, what is Compiler-RT and since it is optional, what do I lose
> if I skip it?
> 
> And finally, why is the Win10 SDK needed? Doesn't that mean it won't
> work on Win7 or Win8? What could Swift need that requires Win10 APIs?
> 
> Thanks,
> Eric
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