即使 Boost_DEBUG 输出显示正确的路径，CMake 也无法在从源代码编译的 Boost 文件夹中找到 Boost 库

Question

我已经使用以下命令成功使用 emscripten 构建了 boost

git clone --recursive https://github.com/boostorg/boost.git --branch 1.85.0
cd boost
./bootstrap.sh
source ~/emsdk/emsdk_env.sh
./b2 toolset=emscripten --with-graph --with-filesystem --with-program_options

现在，我想让一个 CMake 项目使用这个本地 boost 构建。我正在做的是：

git clone https://.../cmakeproject.git cmakeproject
mkdir binaries
cd binaries
emcmake cmake -DBoost_DEBUG=1 -DBOOST_ROOT=/home/andy/boost ../cmakeproject

不幸的是，我收到以下错误：

-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1673 ] _boost_TEST_VERSIONS = "1.77.0;1.77;...;1.33.0;1.33"
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1674 ] Boost_USE_MULTITHREADED = "TRUE"
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1675 ] Boost_USE_STATIC_LIBS = <unset>
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1676 ] Boost_USE_STATIC_RUNTIME = <unset>
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1677 ] Boost_ADDITIONAL_VERSIONS = <unset>
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1678 ] Boost_NO_SYSTEM_PATHS = <unset>
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1710 ] BOOST_ROOT = "/home/andy/boost"
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1711 ] ENV{BOOST_ROOT} = <unset>
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1712 ] BOOST_INCLUDEDIR = <unset>
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1713 ] ENV{BOOST_INCLUDEDIR} = <unset>
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1714 ] BOOST_LIBRARYDIR = <unset>
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1715 ] ENV{BOOST_LIBRARYDIR} = <unset>
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1787 ] _boost_INCLUDE_SEARCH_DIRS = "/home/andy/boost/include;/home/andy/boost;PATHS;C:/boost/include;C:/boost;/sw/local/include"
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1788 ] _boost_PATH_SUFFIXES = "boost-1_77_0;boost_1_77_0;...;boost/boost-1_33;boost/boost_1_33"
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1873 ] Boost_LIB_PREFIX = ""
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1874 ] Boost_NAMESPACE = "boost"
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:953 ] _boost_COMPILER = "-clang190" (guessed)
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1910 ] _boost_MULTITHREADED = "-mt"
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1988 ] _boost_ARCHITECTURE_TAG = "" (detected)
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1992 ] _boost_RELEASE_ABI_TAG = "-"
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:1993 ] _boost_DEBUG_ABI_TAG = "-d"
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:2053 ] _boost_LIBRARY_SEARCH_DIRS_RELEASE = "/home/andy/boost/lib;/home/andy/boost/stage/lib;Boost_INCLUDE_DIR-NOTFOUND/lib;Boost_INCLUDE_DIR-NOTFOUND/../lib;Boost_INCLUDE_DIR-NOTFOUND/stage/lib;PATHS;C:/boost/lib;C:/boost;/sw/local/lib"
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:2054 ] _boost_LIBRARY_SEARCH_DIRS_DEBUG = "/home/andy/boost/lib;/home/andy/boost/stage/lib;Boost_INCLUDE_DIR-NOTFOUND/lib;Boost_INCLUDE_DIR-NOTFOUND/../lib;Boost_INCLUDE_DIR-NOTFOUND/stage/lib;PATHS;C:/boost/lib;C:/boost;/sw/local/lib"
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:2239 ] Searching for FILESYSTEM_LIBRARY_RELEASE: boost_filesystem-clang190-mt-;boost_filesystem-clang190-mt;boost_filesystem-clang190-mt;boost_filesystem-mt-;boost_filesystem-mt;boost_filesystem-mt;boost_filesystem-mt;boost_filesystem
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:2294 ] Searching for FILESYSTEM_LIBRARY_DEBUG: boost_filesystem-clang190-mt-d-;boost_filesystem-clang190-mt-d;boost_filesystem-clang190-mt-d;boost_filesystem-mt-d-;boost_filesystem-mt-d;boost_filesystem-mt-d;boost_filesystem-mt;boost_filesystem
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:2239 ] Searching for GRAPH_LIBRARY_RELEASE: boost_graph-clang190-mt-;boost_graph-clang190-mt;boost_graph-clang190-mt;boost_graph-mt-;boost_graph-mt;boost_graph-mt;boost_graph-mt;boost_graph
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:2294 ] Searching for GRAPH_LIBRARY_DEBUG: boost_graph-clang190-mt-d-;boost_graph-clang190-mt-d;boost_graph-clang190-mt-d;boost_graph-mt-d-;boost_graph-mt-d;boost_graph-mt-d;boost_graph-mt;boost_graph
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:2239 ] Searching for PROGRAM_OPTIONS_LIBRARY_RELEASE: boost_program_options-clang190-mt-;boost_program_options-clang190-mt;boost_program_options-clang190-mt;boost_program_options-mt-;boost_program_options-mt;boost_program_options-mt;boost_program_options-mt;boost_program_options
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:2294 ] Searching for PROGRAM_OPTIONS_LIBRARY_DEBUG: boost_program_options-clang190-mt-d-;boost_program_options-clang190-mt-d;boost_program_options-clang190-mt-d;boost_program_options-mt-d-;boost_program_options-mt-d;boost_program_options-mt-d;boost_program_options-mt;boost_program_options
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:2239 ] Searching for SYSTEM_LIBRARY_RELEASE: boost_system-clang190-mt-;boost_system-clang190-mt;boost_system-clang190-mt;boost_system-mt-;boost_system-mt;boost_system-mt;boost_system-mt;boost_system
-- [ /usr/share/cmake-3.22/Modules/FindBoost.cmake:2294 ] Searching for SYSTEM_LIBRARY_DEBUG: boost_system-clang190-mt-d-;boost_system-clang190-mt-d;boost_system-clang190-mt-d;boost_system-mt-d-;boost_system-mt-d;boost_system-mt-d;boost_system-mt;boost_system
CMake Error at /usr/share/cmake-3.22/Modules/FindPackageHandleStandardArgs.cmake:230 (message):
  Could NOT find Boost (missing: filesystem graph program_options system)
  (found version "1.85.0")
Call Stack (most recent call first):
  /usr/share/cmake-3.22/Modules/FindPackageHandleStandardArgs.cmake:594 (_FPHSA_FAILURE_MESSAGE)
  /usr/share/cmake-3.22/Modules/FindBoost.cmake:2360 (find_package_handle_standard_args)
  cmake/FindDependencies.cmake:7 (find_package)
  CMakeLists.txt:99 (include)

构建过程似乎看不到我构建的库。上面的

_boost_LIBRARY_SEARCH_DIRS_RELEASE

和

_boost_LIBRARY_SEARCH_DIRS_DEBUG

在库搜索路径中都有

/home/andy/boost/stage/lib

。

$ ls /home/andy/boost/stage/lib
cmake               libboost_atomic.so.1.85.0  libboost_filesystem.so.1.85.0  libboost_graph.so.1.85.0     libboost_program_options.so.1.85.0  libboost_regex.so.1.85.0  libboost_system.so.1.85.0
libboost_atomic.a   libboost_filesystem.a      libboost_graph.a               libboost_program_options.a   libboost_regex.a                    libboost_system.a
libboost_atomic.so  libboost_filesystem.so     libboost_graph.so              libboost_program_options.so  libboost_regex.so                   libboost_system.so

构建过程确实检测到我构建了版本 1.85.0，这表明 include 目录已正确读取（我猜，version.hpp 已正确解析）。

我使用 Ubuntu 22.04 发行版从 WSL 进行构建。为了安全起见，我从头开始尝试从两台不同的机器（新的 Ubuntu WSL 发行版）进行构建，并且总是获得相同的结果。

Answer 1

我看不到你的 CMakeLists 是什么样子，但我已经能够将我的以前的演示变成这样的 CMake 项目

建筑提升

与之前的演示相同，但没有

--with-graph

，因此它构建了默认启用的所有库：

git clone --recursive https://github.com/boostorg/boost.git --branch boost-1.85.0 --depth=1 emboost --jobs=16
cd emboost
./bootstrap.sh
./b2 toolset=emscripten # --with-graph

环境

我不使用 emcmake，我更喜欢让 CMake 默认解决它：

• 文件

  CMakeLists.txt

   cmake_minimum_required(VERSION 3.5)
   project(test_build)
  
   set(CMAKE_EXPORT_COMPILE_COMMANDS On)
   set(CMAKE_CXX_STANDARD 17)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -pedantic -fwasm-exceptions")
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fwasm-exceptions")
  
   set(Boost_USE_STATIC_LIBS On)
   find_package(Boost 1.85.0 REQUIRED COMPONENTS graph)
  
   add_executable(test_build.js main.cpp)
   target_link_libraries(test_build.js Boost::graph)
  

除了

Boost_USE_STATIC_LIBS

和

-fwasm-exceptions

之外，所有选项都是可选的，这似乎是使链接正常工作所必需的。

演示程序不变：

• 文件

  main.cpp

   #include <boost/graph/adjacency_list.hpp>
   #include <boost/graph/graph_utility.hpp>
   #include <boost/graph/graphviz.hpp>
  
   struct Vertex {
     int id;
   };
  
   using G = boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS, Vertex>;
  
   int main() {
       G g;
       boost::dynamic_properties dp;
       dp.property("node_id", get(&Vertex::id, g));
  
       std::istringstream dot(R"(digraph G {
           0;
           1;
           2;
           0 -> 1;
           1 -> 2;
           2 -> 0;
       })");
  
       read_graphviz(dot, g, dp);
  
       print_graph(g, get(&Vertex::id, g));
   }
  

我们有现场演示：

export CXX=em++
export CC=emcc
export Boost_DIR=$PWD/../emboost/stage/lib/cmake 
cmake -B build .
make -C build/
node ./build/test_build.js 

打印

0 --> 1 
1 --> 2 
2 --> 0 

证明该链接已被使用，因为

read_graphviz_new.cpp

是一个库对象。