mingw32

I am compiling the following code with the -ffast-math option: #include <limits> #include <cmath> #include <iostream> int main() { std::cout << std::isnan(std::numeric_limits<double>::quiet_NaN() ) << std::endl; } I am getting 0 as output. How can my code tell whether a floating point number is NaN when it is compiled with -ffast-math ? Note: On linux, std::isnan works even with -ffast-math. Since -ffast-math instructs GCC not to handle NaN s, it is expected that isnan() has an undefined behaviour. Returning 0 is therefore valid. You can use the following fast replacement for isnan() : #if

I have reduced the problem to the following basic function which should simply print the number of bytes in the file. When I execute it for a file of 83886080 bytes (80 MB) it prints the correct number. However for a file of 4815060992 bytes (4.48 GB) it prints 520093696 which is way to low. It seems to have something to do with the SEEK_END option because if I set the pointer to 4815060992 bytes manually (e.g. _fseeki64(fp, (__int64)4815060992, SEEK_SET) _ftelli64 does return the correct position. So a workaround would be to get the proper file size without using SEEK_END , how is this done?

I just installed Code::Blocks 12.11 and create a console application by the Wizard the hello world code was in there by default. I tried to compile it but I come across this build error: -------------- Build: Release in example (compiler: GNU GCC Compiler)--------------- mingw32-g++.exe -Wall -fexceptions -O2 -c "E:\Workspace\C++\Code Blocks\example\main.cpp" -o obj\Release\main.o mingw32-g++.exe: error: CreateProcess: No such file or directory Process terminated with status 1 (0 minutes, 0 seconds) 1 errors, 0 warnings (0 minutes, 0 seconds) What should I do to solve it? 来源： https:/

hey the title pretty much says it all. i have been trying different methods from internet sources, but whenever i try something goes wrong..this is where i got Box2D in cMake , i get a bunch of errors when building it(i was going through the steps in the readme.txt, but onfortunately, theyre for Visual C++...) so im wondering hot to set this up as i guess a library (.lib or .a) and use it in my project(my friend passed me his library and when i loaded it in and tried #include ing the box2D headers, they didnt read at all(i got a list of undefined errors) also his box2d was i believe made for

I am cross compiling from linux to windows using the mingw32 tools. I need to generate pdb files for debugging on windows. Is there a way to do this? this project gives you the ability to generate the pdb, it works in most cases for debuging : https://github.com/rainers/cv2pdb more details can help in this post about post mortem debugging http://blog.morlad.at/blah/mingw_postmortem GCC/MinGW produces debug info in its own format used by GNU GDB Debugger, there is no support for Microsoft PDB format. So you can: build application on Windows with MSVC use Windows version of GNU GDB try to

I try to compile (Allegro 5) on MinGW 4.7.1 (using Code::Blocks 12.11 on Win 7) with compiler flags (write them in Project :: Linker settings :: Other linker settings): -static-libgcc -static-libstdc++ Result: unrecognized command line option '-static-libstdc++' How to solve it? What does g++ --version say? I don't know the exact version when it was introduced, but -static-libstdc++ is a fairly recent addition. Before, you had to do something like -static -lstdc++ -dynamic . (If the compiler version is 4.7.1, this should not be a problem, but I don't know how MinGW versions map to the actual