How do I compile for 64bit using G++ w/ CodeBlocks?
I'm currently working on creating a shared lib DLL but I need to load it at runtime in a 64 bit environment so it currently doesn't work.
How can I compile 64bit dlls from code blocks using g++ ?
I've tried compiler options like -m64 but none seem to work.
Answer
To compile 64-bit programs on windows using g++, you need MinGW64. I believe that Code::Blocks comes with MinGW32.
To install it onto Code::Blocks, extract the zip file to a folder without spaces, such as C:\MinGW64
Open Code::Blocks and click on Settings -> Compiler and debugger. Under Selected Compiler, click Copy. In the next box, type something like "MinGW 64-bit Compiler" and click OK.
Then on the Toolchain executables tab, click the Browse button beside each option and browse to the folder you copied MinGW64 to ( C:\MinGW64 ) and go into the bin folder. Set each option as follows:
Compiler's installation directory: The path you specified( C:\MinGW64 )
C compiler: gcc.exe
C++ compiler: g++.exe (If you used my link above it will be g++64.exe, thanks Super Cat for reminding me)
Linker for dynamic libs: g++.exe (g++64.exe if you used my link)
Linker for static libs: ar.exe
Debugger: There isn't one for MinGW64 yet, clear this and leave it blank
Resource compiler: windres.exe
Make program: make.exe
Once you have the compiler set up, compile your DLL with the same settings, only using the 64 bit compiler.