我正在尝试在Ubuntu 17.10上安装(py)caffe
然而，当我执行 make all 时，我遇到了以下错误：
./include/caffe/common.hpp(84): error: namespace "std" has no member "isnan"
./include/caffe/common.hpp(85): error: namespace "std" has no member "isinf"
2 errors detected in the compilation of "/tmp/tmpxft_00004921_00000000-19_nesterov_solver.compute_61.cpp1.ii".
Makefile:594: recipe for target '.build_release/cuda/src/caffe/solvers/nesterov_solver.o' failed
或者当我使用cmake时
/home/thijser/caffe/include/caffe/common.hpp(84): error: namespace "std" has no member "isnan"
/home/thijser/caffe/include/caffe/common.hpp(85): error: namespace "std" has no member "isinf"
2 errors detected in the compilation of "/tmp/tmpxft_00004e32_00000000-7_math_functions.cpp1.ii".
CMake Error at cuda_compile_1_generated_math_functions.cu.o.Release.cmake:282 (message):
Error generating file
/home/thijser/caffe/build/src/caffe/CMakeFiles/cuda_compile_1.dir/util/./cuda_compile_1_generated_math_functions.cu.o
请注意，我不仅是要执行sudo apt-get install caffe，因为这样做并不能安装pycaffe，任何同时安装pycaffe的解决方案都是有效的。我知道std中的isnan可能通过boost实现，或者这涉及c++版本之间的差异？我不是很擅长c++，所以不确定它的工作原理，我在此使用gcc4.9，因为nvcc不喜欢更新的gcc版本。我知道caffe在其他人的机器上和我安装的较旧版本的ubuntu上都可以运行，所以这表明这是一个配置问题。
有人知道如何解决这个问题吗？
编辑：使用cmake的详细模式，我能够找出它正在执行以下操作
/usr/bin/cmake -E remove /home/thijser/caffe/build/src/caffe/CMakeFiles/cuda_compile_1.dir/util/cuda_compile_1_generated_math_functions.cu.o.depend.tmp /home/thijser/caffe/build/src/caffe/CMakeFiles/cuda_compile_1.dir/util/cuda_compile_1_generated_math_functions.cu.o.NVCC-depend
-- Generating /home/thijser/caffe/build/src/caffe/CMakeFiles/cuda_compile_1.dir/util/./cuda_compile_1_generated_math_functions.cu.o
/usr/bin/nvcc /home/thijser/caffe/src/caffe/util/math_functions.cu -c -o /home/thijser/caffe/build/src/caffe/CMakeFiles/cuda_compile_1.dir/util/./cuda_compile_1_generated_math_functions.cu.o -ccbin /usr/bin/cc -m64 -DCAFFE_VERSION=1.0.0 -Xcompiler ,\"-fPIC\",\"-Wall\",\"-Wno-sign-compare\",\"-Wno-uninitialized\",\"-O3\",\"-DNDEBUG\" -gencode arch=compute_61,code=sm_61 -Xcudafe --diag_suppress=cc_clobber_ignored -Xcudafe --diag_suppress=integer_sign_change -Xcudafe --diag_suppress=useless_using_declaration -Xcudafe --diag_suppress=set_but_not_used -DUSE_LMDB -DUSE_LEVELDB -DUSE_OPENCV -DWITH_PYTHON_LAYER -Xcompiler -fPIC -DNVCC -I/home/thijser/caffe/include -I/home/thijser/caffe/src -I/usr/include -I/usr/include/hdf5/serial -I/usr/include/opencv -I/usr/include/x86_64-linux-gnu -I/usr/include/python2.7 -I/usr/local/lib/python2.7/dist-packages/numpy/core/include -I/home/thijser/caffe/build/include -I/home/thijser/caffe/build
/home/thijser/caffe/include/caffe/common.hpp(84): error: namespace "std" has no member "isnan"
/home/thijser/caffe/include/caffe/common.hpp(85): error: namespace "std" has no member "isinf"
以下是针对下面代码的测试： https://ideone.com/Yxvt5m
使用命令 $ gcc -std=c++11 test.cpp 和 g++ test.cpp 相同，结果为：
test.cpp: In function ‘int main()’:
test.cpp:7:15: error: ‘__builtin_isnan’ is not a member of ‘std’
cout << std::isnan(42.0) << std::isinf(42.0);
^
test.cpp:7:15: note: suggested alternative:
<built-in>: note: ‘__builtin_isnan’
test.cpp:7:35: error: ‘__builtin_isinf_sign’ is not a member of ‘std’
cout << std::isnan(42.0) << std::isinf(42.0);
^
test.cpp:7:35: note: suggested alternative:
<built-in>: note: ‘__builtin_isinf_sign’
建议我的机器存在配置问题，然而clang++ test.cpp没有给出任何错误提示，这表明我们可以使用它来安装caffe吗？ $ gcc --version
gcc (Ubuntu 4.8.5-4ubuntu6) 4.8.5
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$gcc -xc++ -E -v -
Using built-in specs.
COLLECT_GCC=gcc
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.8.5-4ubuntu6' --with-bugurl=file:///usr/share/doc/gcc-4.8/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.8 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.8 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-libmudflap --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.8.5 (Ubuntu 4.8.5-4ubuntu6)
COLLECT_GCC_OPTIONS='-E' '-v' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/4.8/cc1plus -E -quiet -v -imultiarch x86_64-linux-gnu -D_GNU_SOURCE - -mtune=generic -march=x86-64 -fstack-protector -Wformat -Wformat-security
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/4.8"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/4.8
/usr/include/x86_64-linux-gnu/c++/4.8
/usr/include/c++/4.8/backward
/usr/lib/gcc/x86_64-linux-gnu/4.8/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/4.8/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
编辑：感谢@EliahKagan在askubuntu聊天室中的建议，我发现在Makefile中添加CXXFLAGS += g++ -D_GLIBCXX_USE_C99_MATH -std=c++11一行解决了这个问题，但不可避免地会引发下一个错误。
thijser@AI-core-Regain:~/caffe/build$ make all
[ 0%] Building CXX object src/caffe/CMakeFiles/caffeproto.dir/__/__/include/caffe/proto/caffe.pb.cc.o
In file included from /home/thijser/caffe/build/include/caffe/proto/caffe.pb.cc:5:
/home/thijser/caffe/build/include/caffe/proto/caffe.pb.h:7:10: fatal error:
'string' file not found
#include <string>
^~~~~~~~
生成了1个错误。
std::isnan和std::isinf是C++11的特性。gcc4.9默认使用c++98标准。你可能需要升级gcc或者在编译选项中添加-std=c++11。 - n. m.gcc -std=c++11 test.cpp。 - n. m.