g++

问题 I'm trying to compile a program that depends on a lot of things. I use and modify the makefile provided to stand for my computer settings, but I keep getting a lot of undefined references in the last step of compilation. The command line that causes the troubles is: gfortran -o ../cosmomc ParamNames.o Matrix_utils.o settings.o IO.o cmbtypes.o Planck_like.o cmbdata.o WeakLen.o & bbn.o lrggettheory.o mpk.o bao.o supernovae.o HST.o SDSSLy-a-v3.o CMB_Cls_simple.o paramdef.o propose.o params_CMB.o

问题 What does 0x4 from the following assembly line mean? cmp 0x4(%esi),%ebx je ... When this compare returns equal and the jump is performed the registers have the values: %esi 0xe944d6d0 %ebx 0xe94ceccc Sorry for asking such a simple question but I'm having a hard time searching such paranthesis notation with google. Spent more than half an hour while under time pressure. 回答1: That is AT&T syntax, in Intel syntax it would be: cmp ebx,[esi+4] Note that the order of operands is reversed. In Intel

问题 I have a software framework compiled and running successfully on both mac and linux. I am now trying to port it to windows (using mingw). So far, I have the software compiling and running under windows but its inevitably buggy. In particular, I have an issue with reading data that was serialized in macos (or linux) into the windows version of the program (segfaults). The serialization process serializes values of primitive variables (longs, ints, doubles etc.) to disk. This is the code I am

问题 I am looking for some function that will return the total capacity of a micro SD card mounted to /dev/sdb. I do not care so much about free space I care about total capacity of the drive. I need a reliable and accurate function. If there is none in existence how would I go about creating one? Thanks! 回答1: strace for blockdev tells me you could use: #include <iostream> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <sys/ioctl.h> #include <linux/fs.h> int main() {

问题 std::put_time does not seem to work. The following snippet is taken directly from en.cpp.reference.com. #include <iostream> #include <iomanip> #include <ctime> int main() { std::time_t t = std::time(nullptr); std::tm tm = *std::localtime(&t); std::cout.imbue(std::locale("ru_RU.utf8")); std::cout << "ru_RU: " << std::put_time(&tm, "%c %Z") << '\n'; std::cout.imbue(std::locale("ja_JP.utf8")); std::cout << "ja_JP: " << std::put_time(&tm, "%c %Z") << '\n'; } Several compilers agree that put_time

问题 I'm making a project and in order to assist in building, I'm using CMake . However, I notice that I can't debug. Here's my launch.json: { "version": "0.2.0", "configurations": [ { "name": "Debug", "type": "gdb", "request": "launch", "target": "./build/bin/CHIP8", "cwd": "${workspaceRoot}", "preLaunchTask": "build" } ] } And here's my tasks.json: { "version": "2.0.0", "tasks": [ { "label": "build", "type": "shell", "command": "cd build && cmake .. && make" } ] } I can't find anything online to

问题 I am Compiling this using g++ and a makefile. The g++ version is 4.1.2 20080704. Here is the simplified code which still contains the error: #ifdef __cplusplus extern "C" { #endif class MyClass { public: MyClass() {}; MyClass& operator=(MyClass&); static MyClass& instance() { return log; }; private: static MyClass log; }; //MyClass MyClass::log; int main() { MyClass& myClass = MyClass::instance(); return 0; } #ifdef __cplusplus } //extern "C" #endif When I compile with 'g++ MyClass.cpp" I get

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: pthread Function from a Class I have this code that I can't get to compile because of the pthread_create line: void* gtk_functor::_threaded_run(void* win) { Gtk::Window* w = static_cast<Gtk::Window*>(win); Gtk::Main::run(*w); delete w; } void gtk_functor::operator ()(Gtk::Window& win, bool threaded) { if (threaded) { pthread_t t_num; pthread_create(&t_num, NULL, (void* (*)(void*))&gtk_functor::_threaded_run,

问题 I've searched existing questions, but I can't seem to solve this. I have a blur_mask.cc file with: #include <iostream> #include <ctime> #include <opencv2/highgui/highgui.hpp> #include <opencv2/gpu/gpu.hpp> #include <vector_types.h> #include <cuda.h> #include <cuda_runtime.h> extern "C" void gpuBlurMask(unsigned char* srcData, int srcStep, uchar3* dst, int dstStep, int width, int height, float *mask, int maskStep, int maskWidth, int maskHeight, int blockSize=16); using namespace std; using

问题 this is my first time trying to build a C++ application, so I'm kind of lost. I've looked at some examples but I still dont really know what's wrong. #include <iostream> #include <stdio.h> #include <windows.h> #include <pcrecpp.h> #include <string> #include <cstring> using namespace std; int main() { char title[256]; char url[256]; string song, diff; HWND hwnd = FindWindow("WindowsForms10.Window.8.app.0.33c0d9d", NULL); GetWindowTextA(hwnd, title, 255); pcrecpp::RE re("^osu! - (.*) \\[(.*)\\]