Visual Studio 2017編譯LLVM7.0
1、編譯環境
Win7 64位
Visual studio 2017 15.6
Windows Kits 10.0.14393.0
2、原始碼
2.1 llvm
llvm-7.0.0.src.tar.xz
解壓至llvm
2.2 Clang
cfe-7.0.0.src.tar.xz
解壓重新命名為：clang
放入：llvm/tools
2.3 clang-extra
clang-tools-extra-7.0.0.src.tar.xz
解壓重新命名為：extra
放入：llvm/tools/clang/tools
2.4 LLD linker
lld-7.0.0.src.tar.xz
解壓重新命名為：lld
放入：llvm/tools
2.5 Polly Loop Optimizer
lld-7.0.0.src.tar.xz
解壓重新命名為：polly
放入：llvm/tools
2.6 Compiler-RT
compiler-rt-7.0.0.src.tar.xz
解壓重新命名為：compiler-rt
放入：llvm/projects
2.7 Libomp
openmp-7.0.0.src.tar.xz
解壓重新命名為：openmp
放入：llvm/projects
2.8 libcxx and libcxxabi
libcxx-7.0.0.src.tar.xz
libcxxabi-7.0.0.src.tar.xz
解壓重新命名為：libcxx 、libcxxabi
放入：llvm/projects
2.9 Test Suite Source Code
test-suite-7.0.0.src.tar.xz
解壓重新命名為：test-suite
放入：llvm/projects
3、編譯準備
3.1 安裝CMake
cmake-3.12.3-win32-x86.zip
最低版本要求：3.4.3
3.2 安裝python
新增PATH
3.3 安裝perl
strawberry-perl-5.28.0.1-32bit.msi
新增PATH
3.4 生成sln
用CMake生成sln
４、編譯
開啟LLVM.sln，建議先檢視5修正錯誤，選擇ALL_BUILD生成即可。
5、除錯錯誤解決
5.1 clang_rt.asan-dynamic-i386
Windows下，Compiler-RT Libraries\RTAsan.i386\asan_malloc_win.cc
中無MemalignFromLocalPool（）函式，新增一個空的。
void* MemalignFromLocalPool(uptr alignment, uptr size) {
return NULL;
}
解決問題。當然空函式對程式的影響未知。
5.2 clangDaemon
Clang libraries\clangDaemon\CodeComplete.h
將檔案編碼另存為：
解決問題。
5.3 OMP
後期生成事件語句錯誤：
setlocal
E:\LLVM\cmake-3.12.3-win32-x86\cmake-3.12.3-win32-x86\bin\cmake.exe -E make_directory E:/LLVM/llvm-7.0.0.src/projects/openmp/runtime/exports/common.50/include
if %errorlevel% neq 0 goto :cmEnd
E:\LLVM\cmake-3.12.3-win32-x86\cmake-3.12.3-win32-x86\bin\cmake.exe -E copy omp.h E:/LLVM/llvm-7.0.0.src/projects/openmp/runtime/exports/common.50/include
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
setlocal
E:\LLVM\cmake-3.12.3-win32-x86\cmake-3.12.3-win32-x86\bin\cmake.exe -E make_directory E:/LLVM/llvm-7.0.0.src/projects/openmp/runtime/exports/win_32.50/lib
if %errorlevel% neq 0 goto :cmEnd
E:\LLVM\cmake-3.12.3-win32-x86\cmake-3.12.3-win32-x86\bin\cmake.exe -E copy E:/LLVM/dist/bin/libomp.dll E:/LLVM/llvm-7.0.0.src/projects/openmp/runtime/exports/win_32.50/lib
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
將標紅部分修改為：
E:\LLVM\cmake-3.12.3-win32-x86\cmake-3.12.3-win32-x86\bin\cmake.exe -E copy E:/LLVM/dist/bin/$(ConfigurationName)/libomp.dll
5.4 ompip
A、包含庫路徑錯誤
由於專案檔案中：libomp.dll.lib路徑有誤。
刪除相應的檔案，按如下目錄新增，或修改
dist\projects\openmp\runtime\src\ompimp.vcxpro檔案中：
<Object Include="E:\LLVM\dist\lib\Debug\libomp.dll.lib" />
B、後期生成事件語句錯誤
setlocal
E:\LLVM\cmake-3.12.3-win32-x86\cmake-3.12.3-win32-x86\bin\cmake.exe -E make_directory E:/LLVM/llvm-7.0.0.src/projects/openmp/runtime/exports/win_32.50/lib
if %errorlevel% neq 0 goto :cmEnd
E:\LLVM\cmake-3.12.3-win32-x86\cmake-3.12.3-win32-x86\bin\cmake.exe -E copy E:/LLVM/dist/lib/libomp.lib E:/LLVM/llvm-7.0.0.src/projects/openmp/runtime/exports/win_32.50/lib
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
將標紅部分修改為：
E:\LLVM\cmake-3.12.3-win32-x86\cmake-3.12.3-win32-x86\bin\cmake.exe -E copy E:/LLVM/dist/lib/$(ConfigurationName)/libomp.lib E:/LLVM/llvm-7.0.0.src/projects/openmp/runtime/exports/win_32.50/lib