当我尝试使用OpenPose Building时，出现错误：标识符“ nullptr”未定义。
我按照站点上的说明安装OpenPose，并且在“ OpenPose Building”中出错。 https://github.com/CMU-Perceptual-Computing-Lab/openpose/blob/master/doc/installation.md#clone-openpose
my@PC:~/openpose/build$ make -j`nproc`
Scanning dependencies of target openpose_caffe
[ 12%] Creating directories for 'openpose_caffe'
[ 25%] No download step for 'openpose_caffe'
[ 37%] [ 50%] No patch step for 'openpose_caffe'
No update step for 'openpose_caffe'
[ 62%] Performing configure step for 'openpose_caffe'
-- The C compiler identification is GNU 4.9.4
-- The CXX compiler identification is GNU 4.9.4
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Boost version: 1.54.0
-- Found the following Boost libraries:
-- system
-- thread
-- filesystem
-- Looking for include file pthread.h
-- Looking for include file pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - not found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE
-- Found GFlags: /usr/include
-- Found gflags (include: /usr/include, library: /usr/lib/x86_64-linux-gnu/libgflags.so)
-- Found Glog: /usr/include
-- Found glog (include: /usr/include, library: /usr/lib/x86_64-linux-gnu/libglog.so)
-- Found PROTOBUF: /usr/lib/x86_64-linux-gnu/libprotobuf.so
-- Found PROTOBUF Compiler: /usr/bin/protoc
-- Found HDF5: /usr/lib/x86_64-linux-gnu/libhdf5_hl.so;/usr/lib/x86_64-linux-gnu/libhdf5.so
-- CUDA detected: 8.0
-- Found cuDNN: ver. 5.1.10 found (include: /usr/include, library: /usr/lib/x86_64-linux-gnu/libcudnn.so)
-- Automatic GPU detection failed. Building for all known architectures.
-- Added CUDA NVCC flags for: sm_30 sm_35 sm_50 sm_52 sm_60 sm_61
-- Found Atlas: /usr/include
-- Found Atlas (include: /usr/include library: /usr/lib/libatlas.so lapack: /usr/lib/liblapack.so
-- Python interface is disabled or not all required dependencies found. Building without it...
-- Found Git: /usr/bin/git (found version "1.9.1")
--
-- ******************* Caffe Configuration Summary *******************
-- General:
-- Version : 1.0.0
-- Git : 1.0-141-g974172c
-- System : Linux
-- C++ compiler : /usr/bin/c++
-- Release CXX flags : -O3 -DNDEBUG -fPIC -Wall -std=c++11 -Wno-sign-compare -Wno-uninitialized
-- Debug CXX flags : -g -fPIC -Wall -std=c++11 -Wno-sign-compare -Wno-uninitialized
-- Build type : Release
--
-- BUILD_SHARED_LIBS : ON
-- BUILD_python : OFF
-- BUILD_matlab : OFF
-- BUILD_docs : OFF
-- CPU_ONLY : OFF
-- USE_OPENCV : OFF
-- USE_LEVELDB : OFF
-- USE_LMDB : OFF
-- USE_NCCL : OFF
-- ALLOW_LMDB_NOLOCK : OFF
-- USE_HDF5 : ON
--
-- Dependencies:
-- BLAS : Yes (Atlas)
-- Boost : Yes (ver. 1.54)
-- glog : Yes
-- gflags : Yes
-- protobuf : Yes (ver. 2.5.0)
-- CUDA : Yes (ver. 8.0)
--
-- NVIDIA CUDA:
-- Target GPU(s) : Auto
-- GPU arch(s) : sm_30 sm_35 sm_50 sm_52 sm_60 sm_61
-- cuDNN : Yes (ver. 5.1.10)
--
-- Install:
-- Install path : /home/miyo/openpose/build/caffe
--
CMake Warning (dev) in src/caffe/CMakeLists.txt:
Policy CMP0022 is not set: INTERFACE_LINK_LIBRARIES defines the link
interface. Run "cmake --help-policy CMP0022" for policy details. Use the
cmake_policy command to set the policy and suppress this warning.
Target "caffe" has an INTERFACE_LINK_LIBRARIES property which differs from
its LINK_INTERFACE_LIBRARIES properties.
INTERFACE_LINK_LIBRARIES:
caffeproto;/usr/lib/x86_64-linux-gnu/libboost_system.so;/usr/lib/x86_64-linux-gnu/libboost_thread.so;/usr/lib/x86_64-linux-gnu/libboost_filesystem.so;/usr/lib/x86_64-linux-gnu/libpthread.so;/usr/lib/x86_64-linux-gnu/libglog.so;/usr/lib/x86_64-linux-gnu/libgflags.so;$<$<NOT:$<CONFIG:DEBUG>>:/usr/lib/x86_64-linux-gnu/libprotobuf.so>;$<$<CONFIG:DEBUG>:/usr/lib/x86_64-linux-gnu/libprotobuf.so>;-lpthread;/usr/lib/x86_64-linux-gnu/libhdf5_hl.so;/usr/lib/x86_64-linux-gnu/libhdf5.so;/usr/lib/x86_64-linux-gnu/libhdf5_hl.so;/usr/lib/x86_64-linux-gnu/libhdf5.so;/usr/lib/x86_64-linux-gnu/libhdf5_hl.so;/usr/lib/x86_64-linux-gnu/libhdf5.so;/usr/lib/x86_64-linux-gnu/libhdf5_hl.so;/usr/lib/x86_64-linux-gnu/libhdf5.so;/usr/local/cuda-8.0/lib64/libcudart.so;/usr/local/cuda-8.0/lib64/libcurand.so;/usr/local/cuda-8.0/lib64/libcublas.so;/usr/lib/x86_64-linux-gnu/libcudnn.so;/usr/lib/liblapack.so;/usr/lib/libcblas.so;/usr/lib/libatlas.so
LINK_INTERFACE_LIBRARIES:
caffeproto;/usr/lib/x86_64-linux-gnu/libboost_system.so;/usr/lib/x86_64-linux-gnu/libboost_thread.so;/usr/lib/x86_64-linux-gnu/libboost_filesystem.so;/usr/lib/x86_64-linux-gnu/libpthread.so;/usr/lib/x86_64-linux-gnu/libglog.so;/usr/lib/x86_64-linux-gnu/libgflags.so;/usr/lib/x86_64-linux-gnu/libprotobuf.so;-lpthread;/usr/lib/x86_64-linux-gnu/libhdf5_hl.so;/usr/lib/x86_64-linux-gnu/libhdf5.so;/usr/lib/x86_64-linux-gnu/libhdf5_hl.so;/usr/lib/x86_64-linux-gnu/libhdf5.so;/usr/lib/x86_64-linux-gnu/libhdf5_hl.so;/usr/lib/x86_64-linux-gnu/libhdf5.so;/usr/lib/x86_64-linux-gnu/libhdf5_hl.so;/usr/lib/x86_64-linux-gnu/libhdf5.so;/usr/local/cuda-8.0/lib64/libcudart.so;/usr/local/cuda-8.0/lib64/libcurand.so;/usr/local/cuda-8.0/lib64/libcublas.so;/usr/lib/x86_64-linux-gnu/libcudnn.so;/usr/lib/liblapack.so;/usr/lib/libcblas.so;/usr/lib/libatlas.so
This warning is for project developers. Use -Wno-dev to suppress it.
-- Configuring done
-- Generating done
-- Build files have been written to: /home/miyo/openpose/build/caffe/src/openpose_caffe-build
[ 75%] Performing build step for 'openpose_caffe'
[ 1%] Running C++/Python protocol buffer compiler on /home/miyo/openpose/3rdparty/caffe/src/caffe/proto/caffe.proto
Scanning dependencies of target caffeproto
[ 1%] Building CXX object src/caffe/CMakeFiles/caffeproto.dir/__/__/include/caffe/proto/caffe.pb.cc.o
Linking CXX static library ../../lib/libcaffeproto.a
[ 1%] Built target caffeproto
[ 1%] [ 1%] [ 2%] [ 2%] [ 4%] [ 5%] [ 6%] [ 6%] [ 6%] Building NVCC (Device) object src/caffe/CMakeFiles/cuda_compile.dir/solvers/./cuda_compile_generated_sgd_solver.cu.o
Building NVCC (Device) object src/caffe/CMakeFiles/cuda_compile.dir/util/./cuda_compile_generated_math_functions.cu.o
[ 6%] Building NVCC (Device) object src/caffe/CMakeFiles/cuda_compile.dir/solvers/./cuda_compile_generated_adam_solver.cu.o
Building NVCC (Device) object src/caffe/CMakeFiles/cuda_compile.dir/layers/./cuda_compile_generated_deconv_layer.cu.o
Building NVCC (Device) object src/caffe/CMakeFiles/cuda_compile.dir/util/./cuda_compile_generated_im2col.cu.o
Building NVCC (Device) object src/caffe/CMakeFiles/cuda_compile.dir/solvers/./cuda_compile_generated_adagrad_solver.cu.o
Building NVCC (Device) object src/caffe/CMakeFiles/cuda_compile.dir/solvers/./cuda_compile_generated_rmsprop_solver.cu.o
Building NVCC (Device) object src/caffe/CMakeFiles/cuda_compile.dir/solvers/./cuda_compile_generated_nesterov_solver.cu.o
Building NVCC (Device) object src/caffe/CMakeFiles/cuda_compile.dir/solvers/./cuda_compile_generated_adadelta_solver.cu.o
[ 8%] [ 8%] Building NVCC (Device) object src/caffe/CMakeFiles/cuda_compile.dir/layers/./cuda_compile_generated_lrn_layer.cu.o
Building NVCC (Device) object src/caffe/CMakeFiles/cuda_compile.dir/layers/./cuda_compile_generated_hdf5_data_layer.cu.o
Building NVCC (Device) object src/caffe/CMakeFiles/cuda_compile.dir/layers/./cuda_compile_generated_cudnn_sigmoid_layer.cu.o
/usr/lib/gcc/x86_64-linux-gnu/4.9/include/stddef.h(432): error: identifier "nullptr" is undefined
/usr/lib/gcc/x86_64-linux-gnu/4.9/include/stddef.h(432): error: expected a ";"
/usr/lib/gcc/x86_64-linux-gnu/4.9/include/stddef.h(432): error: identifier "nullptr" is undefined
/usr/lib/gcc/x86_64-linux-gnu/4.9/include/stddef.h(432): error: expected a ";"
...
/usr/include/c++/4.9/cmath(202): error: variable "std::constexpr" has already been defined
/usr/include/c++/4.9/cmath(202): error: expected a ";"
/usr/include/c++/4.9/cmath(221): error: inline specifier allowed on function declarations only
/usr/include/c++/4.9/cmath(221): error: variable "std::constexpr" has already been defined
/usr/include/c++/4.9/cmath(221): error: expected a ";"
/usr/include/c++/4.9/cmath(240): error: inline specifier allowed on function declarations only
/usr/include/c++/4.9/cmath(240): error: variable "std::constexpr" has already been defined
/usr/include/c++/4.9/cmath(240): error: expected a ";"
Error limit reached.
100 errors detected in the compilation of "/tmp/tmpxft_00001d71_00000000-17_math_functions.compute_61.cpp1.ii".
Compilation terminated.
CMake Error at cuda_compile_generated_math_functions.cu.o.cmake:264 (message):
Error generating file
/home/miyo/openpose/build/caffe/src/openpose_caffe-build/src/caffe/CMakeFiles/cuda_compile.dir/util/./cuda_compile_generated_math_functions.cu.o
make[5]: *** [src/caffe/CMakeFiles/cuda_compile.dir/util/./cuda_compile_generated_math_functions.cu.o] Error 1
make[4]: *** [src/caffe/CMakeFiles/caffe.dir/all] Error 2
make[3]: *** [all] Error 2
make[2]: *** [caffe/src/openpose_caffe-stamp/openpose_caffe-build] Error 2
make[1]: *** [CMakeFiles/openpose_caffe.dir/all] Error 2
make: *** [all] Error 2
请告诉我如何解决此问题。
Ubuntu 14.04， CUDA 8.0， cudnn 5.1， gcc 4.9， g ++ 4.9
我在这里多人张贴。 https://github.com/CMU-Perceptual-Computing-Lab/openpose/issues/981 https://ja.stackoverflow.com/questions/51408/openpose%e3%81%ae%e3%83%93%e3%83%ab%e3%83%89%e6%99%82%e3%81%aberror-identifier-nullptr-is-undefined%e3%81%ae%e3%82%a8%e3%83%a9%e3%83%bc%e3%81%8c%e7%99%ba%e7%94%9f%e3%81%99%e3%82%8b
我运行了以下代码，但无法解决此问题。
sudo apt-get update && sudo apt-get upgrade && sudo apt-get dist-upgrade && sudo apt-get autoremove
附加说明２-
my @ PC：〜$ cc --version cc（Ubuntu 4.9.4-2ubuntu1〜14.04.1）4.9.4 版权所有（C）2015自由软件基金会，Inc. 这是免费软件；请参阅复制条件的来源。没有 保证;甚至不是出于适销性或针对特定目的的适用性。
my @ PC：〜$ c ++-版本 c ++（Ubuntu 4.9.4-2ubuntu1〜14.04.1）4.9.4 版权所有（C）2015自由软件基金会，Inc. 这是免费软件；请参阅复制条件的来源。没有 保证;甚至不是出于适销性或针对特定目的的适用性。
答案 0 :(得分：2)
我认为GCC 4.9应该足够了。需要注意的是，默认情况下它不使用C ++ 11 ，因此必须在定义--std=c++11的{{1}}中的某个地方添加Makefile。软件包的开发人员可能会使用较新版本的GCC，默认情况下会使用C ++ 14，例如GCC 8.2。
由于这是CMake项目，因此您可以添加
CXXFLAGS添加到add_definitions('--std=c++11')
或添加
CMakeLists.txt如果您的CMake版本支持它。