MacOS: Build Error: no member named 'filesystem' in namespace 'boost'

farhanhubble commented 6 months ago

I'm following the steps given for MacOS and ran into a compilation error on the make step.

[ 25%] Building CXX object CMakeFiles/environment.dir/src/environment.cpp.o
In file included from /Users/farhan/devel/udacity/SFND_Lidar_Obstacle_Detection/src/environment.cpp:7:
/Users/farhan/devel/udacity/SFND_Lidar_Obstacle_Detection/src/processPointClouds.h:47:17: error: no member named 'filesystem' in namespace 'boost'; did you mean 'std::__fs::filesystem'?
    std::vector<boost::filesystem::path> streamPcd(std::string dataPath);
                ^~~~~~~~~~~~~~~~~
                std::__fs::filesystem
/Library/Developer/CommandLineTools/SDKs/MacOSX14.2.sdk/usr/include/c++/v1/__filesystem/u8path.h:32:1: note: 'std::__fs::filesystem' declared here
_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
^
/Library/Developer/CommandLineTools/SDKs/MacOSX14.2.sdk/usr/include/c++/v1/__config:724:62: note: expanded from macro '_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM'
      _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem {
                                                             ^
In file included from /Users/farhan/devel/udacity/SFND_Lidar_Obstacle_Detection/src/environment.cpp:9:
/Users/farhan/devel/udacity/SFND_Lidar_Obstacle_Detection/src/processPointClouds.cpp:132:13: error: no member named 'filesystem' in namespace 'boost'; did you mean 'std::__fs::filesystem'?
std::vector<boost::filesystem::path> ProcessPointClouds<PointT>::streamPcd(std::string dataPath)
            ^~~~~~~~~~~~~~~~~
            std::__fs::filesystem
/Library/Developer/CommandLineTools/SDKs/MacOSX14.2.sdk/usr/include/c++/v1/__filesystem/u8path.h:32:1: note: 'std::__fs::filesystem' declared here
_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
^
/Library/Developer/CommandLineTools/SDKs/MacOSX14.2.sdk/usr/include/c++/v1/__config:724:62: note: expanded from macro '_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM'
      _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem {
                                                             ^
In file included from /Users/farhan/devel/udacity/SFND_Lidar_Obstacle_Detection/src/environment.cpp:9:
/Users/farhan/devel/udacity/SFND_Lidar_Obstacle_Detection/src/processPointClouds.cpp:135:17: error: no member named 'filesystem' in namespace 'boost'; did you mean 'std::__fs::filesystem'?
    std::vector<boost::filesystem::path> paths(boost::filesystem::directory_iterator{dataPath}, boost::filesystem::directory_iterator{});
                ^~~~~~~~~~~~~~~~~
                std::__fs::filesystem
/Library/Developer/CommandLineTools/SDKs/MacOSX14.2.sdk/usr/include/c++/v1/__filesystem/u8path.h:32:1: note: 'std::__fs::filesystem' declared here
_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
^
/Library/Developer/CommandLineTools/SDKs/MacOSX14.2.sdk/usr/include/c++/v1/__config:724:62: note: expanded from macro '_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM'
      _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem {
                                                             ^
In file included from /Users/farhan/devel/udacity/SFND_Lidar_Obstacle_Detection/src/environment.cpp:9:
/Users/farhan/devel/udacity/SFND_Lidar_Obstacle_Detection/src/processPointClouds.cpp:135:48: error: no member named 'filesystem' in namespace 'boost'; did you mean 'std::__fs::filesystem'?
    std::vector<boost::filesystem::path> paths(boost::filesystem::directory_iterator{dataPath}, boost::filesystem::directory_iterator{});
                                               ^~~~~~~~~~~~~~~~~
                                               std::__fs::filesystem
/Library/Developer/CommandLineTools/SDKs/MacOSX14.2.sdk/usr/include/c++/v1/__filesystem/u8path.h:32:1: note: 'std::__fs::filesystem' declared here

farhanhubble commented 6 months ago

System information

MacOS Sonoma on Intel Silicon

boost: stable 1.84.0 (bottled), HEAD
Collection of portable C++ source libraries
https://www.boost.org/
/usr/local/Cellar/boost/1.84.0 (16,054 files, 500.8MB) *
  Poured from bottle using the formulae.brew.sh API on 2024-02-20 at 22:42:08
From: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/b/boost.rb
License: BSL-1.0
==> Dependencies
Required: icu4c ✔, xz ✔, zstd ✔

gcc: stable 13.2.0 (bottled), HEAD
GNU compiler collection
https://gcc.gnu.org/
/usr/local/Cellar/gcc/13.2.0 (1,590 files, 401.9MB) *
  Poured from bottle using the formulae.brew.sh API on 2024-02-20 at 22:42:25
From: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/g/gcc.rb
License: GPL-3.0-or-later with GCC-exception-3.1
==> Dependencies
Required: gmp ✔, isl ✔, libmpc ✔, mpfr ✔, zstd ✔

pcl: stable 1.14.0 (bottled), HEAD
Library for 2D/3D image and point cloud processing
https://pointclouds.org/
/usr/local/Cellar/pcl/1.14.0_1 (1,254 files, 146.7MB) *
  Poured from bottle using the formulae.brew.sh API on 2024-02-20 at 22:45:47
From: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/p/pcl.rb
License: BSD-3-Clause
==> Dependencies
Build: cmake ✔, pkg-config ✘
Required: boost ✔, cminpack ✔, eigen ✔, flann ✔, glew ✔, libpcap ✔, libusb ✔, qhull ✔, qt ✔, vtk ✔, libomp ✔

farhanhubble commented 6 months ago

Triage: The file SFND_Lidar_Obstacle_Detection/src/processPointClouds.h does not include boost/filesystem headers nor is there anything in the CmakeList.txt file. The could have been "accidentally working" due to another package, likely QT, importing boost headers in its previous versions.

farhanhubble commented 6 months ago

Adding an explicit #include <boost/filesystem.hpp> to processPointClouds.h solves the issue.

udacity / SFND_Lidar_Obstacle_Detection

MacOS: Build Error: no member named 'filesystem' in namespace 'boost' #54