Good evening, guys! I suppose mingw build would be stable, though, I would like some patches to be picked up. * RC1 LLVM and clang can be built on either msys/autoconf, msys/cmake and mingw/cmake. By CMake, all tests can run but 37 of LLVM and 5 of clang tests would fail. On mingw by configure tests cannot be executed. [PR9505] For compiling, I saw a warning, in llvm-bcanalyzer.cpp. (fixed in r127858) * RC1 3-stage build Please note configure and cmake will set optimizer option to -O2 by default even if clang++ were used. I overwrote for clang --with-optimize-option=-O3. Generated clang would be stable. But stage2-bin and stage3-bin will not match. Investigating. [PR6270] Without r127723, generated clang would be unavailable for parallel build. [PR9505] With -Asserts, I saw more two warnings, lib/Analysis/LazyValueInfo.cpp and lib/Transforms/Instrumentation/PathProfiling.cpp. * RC1 with patches. I have committed many patches for MSYS and mingw. With them, clang and llvm can pass tests without any failures. (On TOT, we can run mingw tests without failures!) [LLVM] - r127239, r127240 Availability of Lit on MSYS configure. - r127723 [PR6270] PathV1::makeUnique() - r127726 Fix failure in test/Other/close-stderr.ll on Windows 7 - r127730 [PR9234] Fix test/CodeGen/X86/dyn-stackalloc.ll with MSYS bash - r127731, r127732, r127733, r127734, r127775 [PR9234] test/CodeGen/X86 tweaks. - r127858 [PR9505] Warning in llvm-bcanalyzer.cpp - r127872 [PR6745] format("%e") [clang] - r127284 Availability of Lit on MSYS configure. - r127729 test/Driver/hello.c: Tweak for cygming. - r127860, r127861 tweak 2 tests for MSYS bash. ...Takumi