Question

我一直在使用LLVM作为后端编写编译器。到目前为止，我编写的CMake文件已在Linux上运行，但在Windows上却没有运气。该项目分为一个库和“驱动程序”可执行文件，它们在单独的子目录中具有自己的CMakeLists.txt。顶层CMakeLists.txt如下所示：

cmake_minimum_required (VERSION 3.7.0)
project (compiler)

set (CMAKE_CXX_STANDARD 14)
set (CMAKE_CXX_STANDARD_REQUIRED ON)
set (CMAKE_CXX_EXTENSIONS OFF)

find_package (LLVM REQUIRED CONFIG)
message (STATUS "Found LLVM ${LLVM_PACKAGE_VERSION}")
message (STATUS "Using LLVMConfig.cmake in: ${LLVM_DIR}")

include_directories (${LLVM_INCLUDE_DIRS})
add_definitions(${LLVM_DEFINITIONS})

add_subdirectory (Compiler_Lib)
add_subdirectory (Compiler_exe)

该库的CMakeLists.txt：

cmake_minimum_required (VERSION 3.7.0)

add_library (compiler_lib 
        AST.cpp
        AST.h
        parser.cpp
        parser.h
        scanner.cpp
        scanner.h
        token.cpp
        token.h
        visualizer.cpp
        visualizer.h
        codegen.cpp
        codegen.h)

target_include_directories (compiler_lib PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})

target_link_libraries(compiler_lib LLVM)

可执行文件的CMakeLists.txt（链接到库失败的地方）：

cmake_minimum_required (VERSION 3.7.0)
project (compiler_exe)

add_executable (compiler_exe Compiler_exe.cpp getopt.h getopt.cpp)
target_link_libraries (compiler_exe LINK_PUBLIC LLVM compiler_lib)

我运行命令"c:\Program Files\CMake\bin\cmake.exe" .. -G"MinGW Makefiles" -DCMAKE_PREFIX_PATH=C:\Users\James\llvm+clang-7.0.0-win64-msvc-release，其中C:\Users\James\llvm+clang-7.0.0-win64-msvc-release是预建LLVM库的路径。但是，之后运行mingw32-make会失败，并显示输出

Scanning dependencies of target compiler_lib
[ 10%] Building CXX object Compiler_Lib/CMakeFiles/compiler_lib.dir/AST.cpp.obj
[ 20%] Building CXX object Compiler_Lib/CMakeFiles/compiler_lib.dir/parser.cpp.obj
[ 30%] Building CXX object Compiler_Lib/CMakeFiles/compiler_lib.dir/scanner.cpp.obj
[ 40%] Building CXX object Compiler_Lib/CMakeFiles/compiler_lib.dir/token.cpp.obj
[ 50%] Building CXX object Compiler_Lib/CMakeFiles/compiler_lib.dir/visualizer.cpp.obj
[ 60%] Building CXX object Compiler_Lib/CMakeFiles/compiler_lib.dir/codegen.cpp.obj
[ 70%] Linking CXX static library libcompiler_lib.a
[ 70%] Built target compiler_lib
Scanning dependencies of target compiler_exe
[ 80%] Building CXX object Compiler_exe/CMakeFiles/compiler_exe.dir/Compiler_exe.cpp.obj
[ 90%] Building CXX object Compiler_exe/CMakeFiles/compiler_exe.dir/getopt.cpp.obj
[100%] Linking CXX executable compiler_exe.exe
c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: cannot find -lLLVM
collect2.exe: error: ld returned 1 exit status
Compiler_exe\CMakeFiles\compiler_exe.dir\build.make:102: recipe for target 'Compiler_exe/compiler_exe.exe' failed
mingw32-make[2]: *** [Compiler_exe/compiler_exe.exe] Error 1
CMakeFiles\Makefile2:176: recipe for target 'Compiler_exe/CMakeFiles/compiler_exe.dir/all' failed
mingw32-make[1]: *** [Compiler_exe/CMakeFiles/compiler_exe.dir/all] Error 2
Makefile:82: recipe for target 'all' failed
mingw32-make: *** [all] Error 2

这是我第一次使用CMake，所以我可能会错过一些显而易见的东西，但是正如我所说的，它似乎可以在Linux上运行。

Answer 1

要使链接成功，必须做两件事：

1）文件libLLVM.a需要存在 2）该文件必须位于库搜索路径中的目录中

应该有一种方法可以让cmake告诉您它搜索库的位置列表，并且您需要找到一种方法来获取libLLVM.a在该目录列表中的位置。

对部分答案表示歉意，但这是故障排除的路径...

将Windows上的LLVM库与CMake和MinGW链接

1 个答案: