我无法让< code>boost::asio在我的c程序中使用cmake。事实上，我已经试着在谷歌上搜索了好几个小时，但是我不能让它工作！

我想在Ubuntu 18.04下的c项目中包含增强::asio和cmake文件。

所以我安装了最新的CMake (cmake版本3.19.4)，下载了boost版本1.74并执行

./bootstrap.sh --prefix=/usr/
sudo ./b2 install

安装目录是 /home/boost/boost_1_74_0。我的CMake文件看起来像这样：

cmake_minimum_required (VERSION 3.1.0)
# Project name
project (machine_tryout VERSION 1.0)

# Boost (header only)
#set(Boost_DEBUG 1)
set(BOOST_ROOT "$ENV{HOME}/boost/boost_1_74_0")
set(Boost_INCLUDE_DIR  "$ENV{HOME}/boost/boost_1_74_0")
set(Boost_LIBRARY_DIR "$ENV{HOME}/boost/boost_1_74_0/libs")
find_package(Boost REQUIRED Components asio) 
    
# Set Executable
add_executable(${PROJECT_NAME} source/tryout.cpp)

但我得到的一切都是：

vm-umic@vm:~/Projects/tryout/build$ cmake ..
CMake Warning at /snap/cmake/775/share/cmake-3.19/Modules/FindBoost.cmake:2034 (message):
  No header defined for asio; skipping header check (note: header-only
  libraries have no designated component)
Call Stack (most recent call first):
  CMakeLists.txt:27 (find_package)


CMake Error at /snap/cmake/775/share/cmake-3.19/Modules/FindPackageHandleStandardArgs.cmake:218 (message):
  Could NOT find Boost (missing: asio) (found version "1.74.0")
Call Stack (most recent call first):
  /snap/cmake/775/share/cmake-3.19/Modules/FindPackageHandleStandardArgs.cmake:582 (_FPHSA_FAILURE_MESSAGE)
  /snap/cmake/775/share/cmake-3.19/Modules/FindBoost.cmake:2193 (find_package_handle_standard_args)
  CMakeLists.txt:27 (find_package)


-- Configuring incomplete, errors occurred!
See also "/home/vm-umic/Projects/tryout/build/CMakeFiles/CMakeOutput.log".

我到底做错了什么？CMake不是告诉我它找到了Boost 1.74吗？如果我尝试＜code＞find_package（Boost REQUIRED）＜/code＞，CMake不会抛出任何错误，但链接也不起作用。我明确告诉CMake在哪里可以找到库，所以为什么CMake找不到Boost？