I'm trying to compile the new version of OpenCV 3.3 (released on Aug 3, 2017) but I'm getting an error of C++11
This is my cmake command line:
cmake -D CMAKE_BUILD_TYPE=RELEASE \
-D CMAKE_INSTALL_PREFIX=/usr/local \
-D WITH_CUDA=ON \
-D ENABLE_FAST_MATH=1 \
-D CUDA_FAST_MATH=1 \
-D WITH_CUBLAS=1 \
-DINSTALL_C_EXAMPLES=OFF \
-D INSTALL_PYTHON_EXAMPLES=ON \
-D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-3.3/modules \
-D BUILD_SHARED_LIBS=ON \
-D WITH_GTK=ON /
-D BUILD_EXAMPLES=ON ..
I've edited CMakeLists by turning ON some components (even without making any changes, the error remain the same):
OCV_OPTION(WITH_OPENGL "Include OpenGL support" ON IF (NOT ANDROID AND NOT WINRT) )
OCV_OPTION(WITH_OPENVX "Include OpenVX support" ON)
OCV_OPTION(WITH_OPENNI "Include OpenNI support" ON IF (NOT ANDROID AND NOT IOS AND NOT WINRT) )
OCV_OPTION(WITH_OPENNI2 "Include OpenNI2 support" ON IF (NOT ANDROID AND NOT IOS AND NOT WINRT) )
OCV_OPTION(WITH_OPENMP "Include OpenMP support" ON)
OCV_OPTION(WITH_OPENCL_SVM "Include OpenCL Shared Virtual Memory support" ON ) # experimental
And here my CMakeError.log file:
Compilation failed:
source file: '/home/jhros/opencv-3.3.0/cmake/checks/cxx11.cpp'
check option: ''
===== BUILD LOG =====
Change Dir: /home/jhros/opencv-3.3.0/build/CMakeFiles/CMakeTmp
Run Build Command:"/usr/bin/make" "cmTC_f915e/fast"
/usr/bin/make -f CMakeFiles/cmTC_f915e.dir/build.make CMakeFiles/cmTC_f915e.dir/build
make[1]: Entering directory '/home/jhros/opencv-3.3.0/build/CMakeFiles/CMakeTmp'
Building CXX object CMakeFiles/cmTC_f915e.dir/cxx11.cpp.o
/usr/bin/c++ -o CMakeFiles/cmTC_f915e.dir/cxx11.cpp.o -c /home/jhros/opencv-3.3.0/cmake/checks/cxx11.cpp
/home/jhros/opencv-3.3.0/cmake/checks/cxx11.cpp:4:2: error: #error "C++11 is not supported"
#error "C++11 is not supported"
^
/home/jhros/opencv-3.3.0/cmake/checks/cxx11.cpp: In function ‘int main()’:
/home/jhros/opencv-3.3.0/cmake/checks/cxx11.cpp:11:10: error: ‘res’ does not name a type
auto res = test();
^
/home/jhros/opencv-3.3.0/cmake/checks/cxx11.cpp:12:12: error: ‘res’ was not declared in this scope
return res;
^
CMakeFiles/cmTC_f915e.dir/build.make:65: recipe for target 'CMakeFiles/cmTC_f915e.dir/cxx11.cpp.o' failed
make[1]: *** [CMakeFiles/cmTC_f915e.dir/cxx11.cpp.o] Error 1
make[1]: Leaving directory '/home/jhros/opencv-3.3.0/build/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_f915e/fast' failed
make: *** [cmTC_f915e/fast] Error 2
And my CMakeLists (not all of it):
# ----------------------------------------------------------------------------
# Root CMake file for OpenCV
#
# From the off-tree build directory, invoke:
# $ cmake <PATH_TO_OPENCV_ROOT>
#
# ----------------------------------------------------------------------------
# Disable in-source builds to prevent source tree corruption.
if(" ${CMAKE_SOURCE_DIR}" STREQUAL " ${CMAKE_BINARY_DIR}")
message(FATAL_ERROR "
FATAL: In-source builds are not allowed.
You should create separate directory for build files.
")
endif()
include(cmake/OpenCVMinDepVersions.cmake)
if(CMAKE_GENERATOR MATCHES Xcode AND XCODE_VERSION VERSION_GREATER 4.3)
cmake_minimum_required(VERSION 3.0 FATAL_ERROR)
elseif(CMAKE_SYSTEM_NAME MATCHES WindowsPhone OR CMAKE_SYSTEM_NAME MATCHES WindowsStore)
cmake_minimum_required(VERSION 3.1 FATAL_ERROR)
#Required to resolve linker error issues due to incompatibility with CMake v3.0+ policies.
#CMake fails to find _fseeko() which leads to subsequent linker error.
#See details here: http://www.cmake.org/Wiki/CMake/Policies
cmake_policy(VERSION 2.8)
else()
cmake_minimum_required(VERSION "${MIN_VER_CMAKE}" FATAL_ERROR)
endif()
# Following block can broke build in case of cross-compilng
# but CMAKE_CROSSCOMPILING variable will be set only on project(OpenCV) command
# so we will try to detect crosscompiling by presense of CMAKE_TOOLCHAIN_FILE
if(NOT DEFINED CMAKE_INSTALL_PREFIX)
if(NOT CMAKE_TOOLCHAIN_FILE)
# it _must_ go before project(OpenCV) in order to work
if(WIN32)
set(CMAKE_INSTALL_PREFIX "${CMAKE_BINARY_DIR}/install" CACHE PATH "Installation Directory")
else()
set(CMAKE_INSTALL_PREFIX "/usr/local" CACHE PATH "Installation Directory")
endif()
else(NOT CMAKE_TOOLCHAIN_FILE)
#Android: set output folder to ${CMAKE_BINARY_DIR}
set( LIBRARY_OUTPUT_PATH_ROOT ${CMAKE_BINARY_DIR} CACHE PATH "root for library output, set this to change where android libs are compiled to" )
# any crosscompiling
set(CMAKE_INSTALL_PREFIX "${CMAKE_BINARY_DIR}/install" CACHE PATH "Installation Directory")
endif(NOT CMAKE_TOOLCHAIN_FILE)
endif()
if(CMAKE_SYSTEM_NAME MATCHES WindowsPhone OR CMAKE_SYSTEM_NAME MATCHES WindowsStore)
set(WINRT TRUE)
endif(CMAKE_SYSTEM_NAME MATCHES WindowsPhone OR CMAKE_SYSTEM_NAME MATCHES WindowsStore)
if(WINRT)
add_definitions(-DWINRT -DNO_GETENV)
# Making definitions available to other configurations and
# to filter dependency restrictions at compile time.
if(CMAKE_SYSTEM_NAME MATCHES WindowsPhone)
set(WINRT_PHONE TRUE)
add_definitions(-DWINRT_PHONE)
elseif(CMAKE_SYSTEM_NAME MATCHES WindowsStore)
set(WINRT_STORE TRUE)
add_definitions(-DWINRT_STORE)
endif()
if(CMAKE_SYSTEM_VERSION MATCHES 10)
set(WINRT_10 TRUE)
add_definitions(-DWINRT_10)
elseif(CMAKE_SYSTEM_VERSION MATCHES 8.1)
set(WINRT_8_1 TRUE)
add_definitions(-DWINRT_8_1)
elseif(CMAKE_SYSTEM_VERSION MATCHES 8.0)
set(WINRT_8_0 TRUE)
add_definitions(-DWINRT_8_0)
endif()
endif()
if(POLICY CMP0020)
cmake_policy(SET CMP0020 OLD)
endif()
if(POLICY CMP0022)
cmake_policy(SET CMP0022 OLD)
endif()
if(POLICY CMP0023)
cmake_policy(SET CMP0023 NEW)
endif()
if(POLICY CMP0026)
# silence cmake 3.0+ warnings about reading LOCATION attribute
cmake_policy(SET CMP0026 OLD)
endif()
if(POLICY CMP0042)
cmake_policy(SET CMP0042 NEW)
endif()
if(POLICY CMP0046)
cmake_policy(SET CMP0046 OLD)
endif()
if(POLICY CMP0051)
cmake_policy(SET CMP0051 NEW)
endif()
if(POLICY CMP0056)
cmake_policy(SET CMP0056 NEW)
endif()
if(POLICY CMP0067)
cmake_policy(SET CMP0067 NEW)
endif()
include(cmake/OpenCVUtils.cmake)
# must go before the project command
ocv_update(CMAKE_CONFIGURATION_TYPES "Debug;Release" CACHE STRING "Configs" FORCE)
if(DEFINED CMAKE_BUILD_TYPE)
set_property( CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS ${CMAKE_CONFIGURATION_TYPES} )
endif()
enable_testing()
project(OpenCV CXX C)
if(MSVC)
set(CMAKE_USE_RELATIVE_PATHS ON CACHE INTERNAL "" FORCE)
endif()
ocv_cmake_eval(DEBUG_PRE ONCE)
ocv_clear_vars(OpenCVModules_TARGETS)
include(cmake/OpenCVDownload.cmake)
# ----------------------------------------------------------------------------
# Break in case of popular CMake configuration mistakes
# ----------------------------------------------------------------------------
if(NOT CMAKE_SIZEOF_VOID_P GREATER 0)
message(FATAL_ERROR "CMake fails to deterimine the bitness of target platform.
Please check your CMake and compiler installation. If you are crosscompiling then ensure that your CMake toolchain file correctly sets the compiler details.")
endif()
# ----------------------------------------------------------------------------
# Detect compiler and target platform architecture
# ----------------------------------------------------------------------------
OCV_OPTION(ENABLE_CXX11 "Enable C++11 compilation mode" "${OPENCV_CXX11}")
include(cmake/OpenCVDetectCXXCompiler.cmake)
# Add these standard paths to the search paths for FIND_LIBRARY
# to find libraries from these locations first
if(UNIX AND NOT ANDROID)
if(X86_64 OR CMAKE_SIZEOF_VOID_P EQUAL 8)
if(EXISTS /lib64)
list(APPEND CMAKE_LIBRARY_PATH /lib64)
else()
list(APPEND CMAKE_LIBRARY_PATH /lib)
endif()
if(EXISTS /usr/lib64)
list(APPEND CMAKE_LIBRARY_PATH /usr/lib64)
else()
list(APPEND CMAKE_LIBRARY_PATH /usr/lib)
endif()
elseif(X86 OR CMAKE_SIZEOF_VOID_P EQUAL 4)
if(EXISTS /lib32)
list(APPEND CMAKE_LIBRARY_PATH /lib32)
else()
list(APPEND CMAKE_LIBRARY_PATH /lib)
endif()
if(EXISTS /usr/lib32)
list(APPEND CMAKE_LIBRARY_PATH /usr/lib32)
else()
list(APPEND CMAKE_LIBRARY_PATH /usr/lib)
endif()
endif()
endif()
# Add these standard paths to the search paths for FIND_PATH
# to find include files from these locations first
if(MINGW)
if(EXISTS /mingw)
list(APPEND CMAKE_INCLUDE_PATH /mingw)
endif()
if(EXISTS /mingw32)
list(APPEND CMAKE_INCLUDE_PATH /mingw32)
endif()
if(EXISTS /mingw64)
list(APPEND CMAKE_INCLUDE_PATH /mingw64)
endif()
endif()
EDIT
CMake version -3.5
Compiler GNU 5.4.1
EDIT2
I'm compiling with GNU 7.1.0 now but I get different error
Build output check failed:
Regex: 'command line option .* is valid for .* but not for C\+\+'
Output line: 'cc1plus: warning: command line option ‘-Wmissing-prototypes’ is valid for C/ObjC but not for C++'
Compilation failed:
source file: '/home/jhros/opencv-3.3.0/build/CMakeFiles/CMakeTmp/src.cxx'
check option: ' -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes'
答案 0 :(得分：13)
我最终成功地从源代码编译OpenCV 3.3，但是我仍然不知道它为什么以前不会编译。我修改的所有内容都是OPENCV_EXTRA_MODULES_PATH模块的源文件所在的引用标记opencv_contrib 3.3.0，如下所示：
$ cmake \
-D CMAKE_BUILD_TYPE=RELEASE \
-D CMAKE_INSTALL_PREFIX=/usr/local \
-D WITH_CUDA=ON \
-D ENABLE_FAST_MATH=1 \
-D CUDA_FAST_MATH=1 \
-D WITH_CUBLAS=1 \
-D INSTALL_C_EXAMPLES=OFF \
-D INSTALL_PYTHON_EXAMPLES=ON \
-D OPENCV_EXTRA_MODULES_PATH=/home/jhros/opencv-3.3.0/opencv_contrib-3.3.0/modules \
-D BUILD_SHARED_LIBS=ON \
-D WITH_GTK=ON \
-D BUILD_EXAMPLES=ON ..
我收到了无数的善意警告（以及其他许多警告）：
warning: dynamic exception specifications are deprecated in C++11
此外，您可能会遇到cuda不支持GCC更新版本的错误：
#error -- unsupported GNU version! gcc versions later than 5 are not supported!
但这可以通过在编译cmake
GCC设置为使用旧版OpenCV来解决
CMAKE_C_COMPILER=/usr/bin/gcc-5
答案 1 :(得分：2)
我也有此错误，并向opencv_contrib添加参数OPENCV_EXTRA_MODULES_PATH指向了
答案 2 :(得分：1)
这里的问题并不在于您尝试使用C ++ 11而是完全相反，源代码依赖于它（根据auto res = test();给出的错误判断，这是一个C ++ 11特性）
对于GCC 5.4，默认的C ++标准是带有GNU扩展的C ++ 98，如documentation中所述，尽管您可以明确设置C ++ 11标准（GCC 5.4中几乎完全支持）使用-std=c++11标志。这可能可能解决了这个问题，但是更新到GCC 7.1（正如Mark Setchell建议的那样）是更好的主意并且解决了开箱即用的问题（7.1中的默认标准是带有GNU扩展的C ++ 14 ）。
关于如何传递标志：您只需要将set(CMAKE_CXX_FLAGS "-std=c++11")添加到CMakeLists.txt的开头，或者在CMake GUI中添加一个字符串条目，其名称为CMAKE_CXX_FLAGS，值为-std=c++11。
答案 3 :(得分：1)
我在Linux Mint 18.2上安装了OpenCV 3.3.1，接下来是本文（https://www.learnopencv.com/install-opencv3-on-ubuntu/），我遇到了同样的问题。我从
改变了cmake命令cmake -D CMAKE_BUILD_TYPE=RELEASE \
-D CMAKE_INSTALL_PREFIX=/usr/local \
-D INSTALL_C_EXAMPLES=ON \
-D INSTALL_PYTHON_EXAMPLES=ON \
-D WITH_TBB=ON \
-D WITH_V4L=ON \
-D WITH_QT=ON \
-D WITH_OPENGL=ON \
-D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib/modules \
-D BUILD_EXAMPLES=ON ..
到
cmake -D CMAKE_BUILD_TYPE=RELEASE \
-DCMAKE_INSTALL_PREFIX=/usr/local \
-D INSTALL_C_EXAMPLES=OFF \
-D INSTALL_PYTHON_EXAMPLES=OFF \
-D WITH_TBB=ON \
-D WITH_V4L=ON \
-D WITH_QT=ON \
-D WITH_OPENGL=ON \
-D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib/modules \
-D BUILD_EXAMPLES=OFF ..
（从-D CMAKE_INSTALL_PREFIX=/usr/local \更改为-DCMAKE_INSTALL_PREFIX=/usr/local \），它对我有用。希望有用。
注意：3.3.0不起作用。
（抱歉我的英文）
答案 4 :(得分：0)
添加-DENABLE_CXX11 = ON为我解决