g++

问题 I have one 3rd party c++ project which doesn't support windows and now I am looking for a way to do cross-compile that code and make a dll out of that so I can use that in my c# code. This is the 3rd party code(https://github.com/usnistgov/NFIQ2) am looking to make dll file for my windows c# project. Any suggestion or help ? 回答1: As stated in an issue on the official repository, the iso_wg3 branch supports Windows builds and the README.md includes build instructions. 来源： https://stackoverflow

问题 I want to install an OpenCV version locally on OSX in a folder without overwriting the old installation that I need for an old executable. I followed [these instructions][1], particularly the Building OpenCV from Source Using CMake, Using the Command Line section. So basically I: downloaded the source code with git and now it is in the subfolder openCV Created a new directory cmake_bin_dir Entered in cmake_bin_dir and created another subdirectory instDir From the cmake_bin_dir I launched the

问题 I am using Eclipse for a C project. I created a new Project by going to New->C project->Executable->Empty Project, Linux gcc toolchain. When I add a new .c file, I get "program 'g++' not found in path". How do I get rid of this? I'm not even using C++. 回答1: I had similar problem and it is solved by Installing g++ The GNU C++ complier using ubuntu software centre and Changing in - Window -> Preferences -> C/C++ -> Build -> Settings -> Discovery -> CDT GCC Build in Complier Settings [Shared]

问题 I am trying to learn to make 2d games using c++ with the SFML library. I am using windows, but I would prefer to use the Atom text editor instead of Visual Studio. I did a lot of research on how to do this, but I still do not know how to use the SFML library with Atom. So, how would I go about implementing the SFML library in my c++ project written in Atom. Thank you! 回答1: This answer supposes that you've downloaded the 32-bit MinGW version of SFML, and you'd like to compile programs written

问题 I'm working on some OpenCV code and developed it in VS 2008 on windows. I'm trying to run the code on Linux with g++ but I get the error "Cannot call constructor 'ImageProcessor::ImageProcessor' directly" for ImageProcessor and all of the other classes I have created. I've attempted to find a way to indirectly call the constructor, but to no avail. Any suggestion would be great. The code compiles and runs fine on Windows. if (x == 1){ cout <<"MODE SELECTED: IMAGE TESTING \n"; ImageProcessor*

问题 I work on a runtime system for an application domain that is very performance sensitive. We go to a lot of effort to maintain backward compatibility with older compiler versions, including avoiding more recently-implemented language constructs, and synthesizing them for the older versions. However, I'm concerned that this effort does a disservice to our users, by enabling them to continue to use compiler releases that are costing them huge amounts of performance. Unfortunately, I haven't been

问题 This is some of my actual code that deals with exposing C++ classes to Lua, exemplified: #include <lua5.1/lua.hpp> #include <tuple> //in actual code, lots of specializations of these C++<=>Lua's stack helper functions. Here it's just a sample. template<typename T> T to(lua_State*, int); template<> int to(lua_State* l, int i){ return lua_tointeger(l, i); } template<typename T> void push(lua_State*, T); template<> void push(lua_State* l, int val){ lua_pushinteger(l, val); } //in actual code,

问题 Working on Mac OS X 10.6.2, Intel, with i686-apple-darwin10-g++-4.2.1, and compiling with the -arch x86_64 flag, I just noticed that while... std::numeric_limits<long double>::max_exponent10 = 4932 ...as is expected, when a long double is actually set to a value with exponent greater than 308, it becomes inf--ie in reality it only has 64bit precision instead of 80bit. Also, sizeof() is showing long doubles to be 16 bytes, which they should be. Finally, using <limits.h> gives the same results

问题 My code is as simple as this: #include <mpi.h> int main(int argc, char**args) { MPI_Init(&argc, &args); int mpiSize; int mpiRank; MPI_Comm_size(MPI_COMM_WORLD, &mpiSize); MPI_Comm_rank(MPI_COMM_WORLD, &mpiRank); MPI_Finalize(); } I first compile it to object file: g++ -c src/mpitest.cpp -o src/mpitest.o Then I can easily use mpicxx: mpicxx src/mpitest.o -o mpi But I want to use g++ instead, because It's easier for automake, so I tried: mpicxx src/mpitest.o -o mpi -show It prints out: g++ src

问题 I have built the latest version of GCC in a directory. How do I point CLion to use it? 回答1: After doing some more research, I realized that what I need to configure is CMake. Since CLion has a bundled CMake, you can configure this inside CLion. Go to Settings -> Build, Execution, Deployment -> CMake. Under CMake options, add -D CMAKE_CXX_COMPILER=... and replace ... with the path to g++ . There are other ways to do this, which are probably better. I just did this and it worked, but if you