Windows10 fails to compile llvm10.x with MinGW-64

[xmhwws]

Code downloaded from github, its upload time: GMT + 8 February 20, 2020 10:41 pm, commit ID: d75ce45, link: https://github.com/llvm/llvm-project/tree/d75ce45777d9802d43b555993fde8ed6562fb368

Compilation results:
[100%] Built target obj.clangAST
mingw32-make: *** [Makefile:168: all] Error 2

Related Information:
[100%] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ParentMap.cpp.obj
E:\llvm-project-release-10.x\llvm\tools\llvm-ar\llvm-ar.cpp:[100%]
In function 'bool comparePaths(llvm::StringRef, llvm::StringRef)':
E:\llvm-project-release-10.x\llvm\tools\llvm-ar\llvm-ar.cpp:524:10: error: 'CompareStringOrdinal' was not declared in this scope
return CompareStringOrdinal(WPath1.data(), WPath1.size(), WPath2.data(),
^~~~~~~~~~~~~~~~~~~~
[100%] Building CXX object tools/llvm-objcopy/CMakeFiles/llvm-objcopy.dir/MachO/MachOWriter.cpp.objE:\llvm-project-release-10.x\llvm\tools\llvm-ar\llvm-ar.cpp:524:10:
note: suggested alternative: 'CompareStringA'
return CompareStringOrdinal(WPath1.data(), WPath1.size(), WPath2.data(),
[100%] ^~~~~~~~~~~~~~~~~~~~Building CXX object tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/TestAfterDivZeroChecker.cpp.obj

CompareStringA
[100%] Built target sancov
[100%] mingw32-make[2]: *** [tools\llvm-ar\CMakeFiles\llvm-ar.dir\build.make:80: tools/llvm-ar/CMakeFiles/llvm-ar.dir/llvm-ar.cpp.obj] Error 1
mingw32-make[1]: *** [CMakeFiles\Makefile2:25090: tools/llvm-ar/CMakeFiles/llvm-ar.dir/all] Error 2
Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/PrintfFormatString.cpp.objmingw32-make[1]: *** Waiting for unfinished jobs....

Compilation process:

mkdir build
cd build
cmake -G "MinGW Makefiles" --enable-optimized --enable-targets=host-only -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_ASSERTIONS=ON -DLLVM_ENABLE_PROJECTS=clang ../llvm
mingw32-make -j10

[zmodem]

This sounds like https://bugs.llvm.org/show_bug.cgi?id=44907

[xmhwws]

This sounds like https://bugs.llvm.org/show_bug.cgi?id=44907

Thank you for your help, the problem has been resolved.
I have a little doubt. Since you already know this problem before, why not add the solution to the code?

[zmodem]

I have a little doubt. Since you already know this problem before, why not add the solution to the code?

There is a patch in review, but it hasn't been committed yet: https://reviews.llvm.org/D74599

[RKSimon]

I have a little doubt. Since you already know this problem before, why not add the solution to the code?

There is a patch in review, but it hasn't been committed yet: https://reviews.llvm.org/D74599

Fixed by 01f9abb