使用vcpkg安装PCL后导入头文件出现__builtin_ia32_foo未声明编译错误

本人主要熟悉Python，对C++及编译知识陌生。按PCL官方推荐用vcpkg执行vcpkg install pcl:x64-windows安装PCL后，只要导入任意PCL库，就会出现大量__builtin_ia32前缀相关编译错误，疑似源于PCL依赖的Eigen库。此前未导入PCL的代码可正常编译。

编译错误示例 #

====================[ Build | FallingRockDetectionPC | Debug ]==================
"C:\Program Files\JetBrains\CLion 2022.3\bin\cmake\win\bin\cmake.exe" --build C:\...\Projects\FallingRockDetectionPC\cmake-build-debug --target FallingRockDetectionPC -j 16
[1/3] Building CXX object CMakeFiles/FallingRockDetectionPC.dir/main.cpp.obj
FAILED: CMakeFiles/FallingRockDetectionPC.dir/main.cpp.obj 
C:\PROGRA~1\JETBRA~1\CLION2~1.3\bin\mingw\bin\G__~1.EXE -DDISABLE_PNG -D__SSE2__ -D__SSE3__ -D__SSE4_1__ -D__SSE4_2__ -D__SSE__ -D__SSSE3__ -isystem C:/.../Programs/vcpkg/installed/x64-windows/include -isystem C:/.../Programs/vcpkg/installed/x64-windows/include/eigen3 -g -fdiagnostics-color=always -MD -MT CMakeFiles/FallingRockDetectionPC.dir/main.cpp.obj -MF CMakeFiles\FallingRockDetectionPC.dir\main.cpp.obj.d -o CMakeFiles/FallingRockDetectionPC.dir/main.cpp.obj -c C:/.../Projects/FallingRockDetectionPC/main.cpp

In file included from C:/Users/samue/Programs/vcpkg/installed/x64-windows/include/Eigen/src/Core/util/ConfigureVectorization.h:349,
                 from .../vcpkg/installed/x64-windows/include/Eigen/Core:22,
                 from .../vcpkg/installed/x64-windows/include/pcl/memory.h:48,
                 from .../vcpkg/installed/x64-windows/include/pcl/io/pcd_io.h:42,
                 .
                 .
                 .
...\mingw64\lib\gcc\x86_64-w64-mingw32\12.2.0\include\pmmintrin.h: In function '__m128 _mm_addsub_ps(__m128, __m128)':
...\mingw64\lib\gcc\x86_64-w64-mingw32\12.2.0\include\pmmintrin.h:53:19: error: '__builtin_ia32_addsubps' was not declared in this scope; did you mean '__builtin_ia32_subps'?
   53 |   return (__m128) __builtin_ia32_addsubps ((__v4sf)__X, (__v4sf)__Y);
      |                   ^~~~~~~~~~~~~~~~~~~~~~~
      |                   __builtin_ia32_subps

已尝试的解决步骤 #

• 使用x64版本CMake重新编译vcpkg中的PCL
• 将CLion自带MinGW替换为外部最新版本
• 彻底删除vcpkg及相关文件夹后重新安装PCL（此前误装x86版本包）

项目CMakeLists.txt内容 #

cmake_minimum_required(VERSION 3.24)
project(FallingRockDetectionPC)

find_package(PCL CONFIG REQUIRED)
include_directories(${PCL_INCLUDE_DIRS})
link_directories(${PCL_LIBRARY_DIRS})
add_definitions(${PCL_DEFINITIONS})

set(CMAKE_CXX_STANDARD 17)

add_executable(FallingRockDetectionPC main.cpp load_sequential_pc.cpp load_sequential_pc.h)
target_link_libraries(FallingRockDetectionPC PRIVATE ${PCL_LIBRARIES})

可行解决方案 #

错误根源是PCL通过${PCL_DEFINITIONS}传递了强制启用SSE指令集的宏，但MinGW在部分环境下无法正确识别这些指令集内置函数。可按以下步骤修复：

1. 移除自动添加的指令集宏 #

在CMakeLists.txt中删除add_definitions(${PCL_DEFINITIONS})，避免强制开启不兼容的指令集优化。

2. 手动指定兼容的编译选项 #

如果需要保留基础优化，可手动添加大部分CPU都支持的SSE2指令集：

# 替换原add_definitions(${PCL_DEFINITIONS})
target_compile_options(FallingRockDetectionPC PRIVATE -msse2)

3. 确保工具链一致性 #

使用MinGW专属的vcpkg triplet重新安装PCL，保证编译工具链统一：

set VCPKG_TARGET_TRIPLET=x64-windows-mingw
vcpkg install pcl:x64-windows-mingw

然后在CLion的CMake配置中指定vcpkg工具链文件：

set(CMAKE_TOOLCHAIN_FILE "C:/.../Programs/vcpkg/scripts/buildsystems/vcpkg.cmake" CACHE STRING "Vcpkg toolchain file")

4. 兜底方案：禁用Eigen向量优化 #

如果以上方法无效，可强制Eigen不使用SIMD优化：

add_definitions(-DEIGEN_DONT_VECTORIZE)

内容的提问来源于stack exchange，提问作者scrams