cmake - 如何仅在cmake中匹配主要版本

Question

我正在尝试构建一个需要 LLVM 11 作为依赖项的项目。他们捆绑了一份 LLVM 11.0.1。我想针对系统版本构建它，即 LLVM 11.1.0。在 cmake 构建文件中，它们具有:

find_package(LLVM 11.0 CONFIG)

如果您尝试使用系统 LLVM，您会收到以下错误:

CMake Warning at 3rdparty/llvm.cmake:42 (find_package):
  Could not find a configuration file for package "LLVM" that is compatible
  with requested version "11.0".

  The following configuration files were considered but not accepted:

    /usr/lib/llvm/11/lib64/cmake/llvm/LLVMConfig.cmake, version: 11.1.0
    /usr/lib/llvm/11/lib/cmake/llvm/LLVMConfig.cmake, version: 11.1.0

Call Stack (most recent call first):
  3rdparty/CMakeLists.txt:436 (include)

我认为将行更改为这样可以解决问题:

find_package(LLVM 11 CONFIG)

但它没有，我得到了完全相同的错误:

CMake Warning at 3rdparty/llvm.cmake:42 (find_package):
  Could not find a configuration file for package "LLVM" that is compatible
  with requested version "11".

  The following configuration files were considered but not accepted:

    /usr/lib/llvm/11/lib64/cmake/llvm/LLVMConfig.cmake, version: 11.1.0
    /usr/lib/llvm/11/lib/cmake/llvm/LLVMConfig.cmake, version: 11.1.0

Call Stack (most recent call first):
  3rdparty/CMakeLists.txt:436 (include)

我错过了什么？这是代码的完整链接:https://github.com/RPCS3/rpcs3/blob/master/3rdparty/llvm.cmake

Answer 1

一个版本是否被认为与所请求的版本兼容由您要查找的包指定。我没有查看 LLVM 配置，但我怀疑它指定只有确切的版本兼容，而不是具有相同主要版本的所有版本。

如果您运行的是 CMake 3.19 或更高版本，您可以将版本范围传递给 find_package , 所以你可以试试 find_package(LLVM 11...<12 CONFIG)相反。