How to Compile mingw-w64-crt

Question

I'm on Windows 10 and using the latest version of MSYS2 (with gcc installed: pacman -S gcc )

I'm trying to compile mingw-w64-headers and mingw-w64-crt from mingw-w64-v7.0.0

Inside of my MSYS2 installation directory C:\msys2 I have created the folder mingw-w64 which I reference in the prefix argument below.

To compile each of these I use the same steps (replace name of library where appropriate):

mkdir mingw-w64-crt && cd mingw-w64-crt
../mingw-w64-v7.0.0/mingw-w64-crt/configure --prefix=/mingw-w64
make
make install

This works for mingw-w64-headers however for mingw-w64-crt I encounter errors at the make step. Specifically: incompatible types when assigning to type ' mbstate_t ' {aka ' struct anonymous '} from type 'int'. A more detailed error image can be found here .

I would appreciate some guidance as to how to proceed.

Answer 1

I suggest that you just open one of MSYS2's MinGW environments (by running mingw32.exe or mingw64.exe) and then install the complete MinGW-w64 toolchain by running this:

pacman -S $MINGW_PACKAGE_PREFIX-toolchain

The toolchain includes GCC, the MinGW-w64 libraries, and the MinGW-w64 headers. If those prebuilt MinGW-w64 things are good enough for you, then you're done.

If you want to compile your own MinGW-w64, then should be able to use the environment you just installed to do it. To double-check that you are using the right toolchain, run which gcc and make sure it returns /mingw64/bin/gcc or /mingw32/bin/gcc .

Answer 2

Performing the following has allowed me to successfully compile:

pacman -S $MINGW_PACKAGE_PREFIX-toolchain
mkdir mingw-w64-crt && cd mingw-w64-crt
../mingw-w64-v7.0.0/mingw-w64-crt/configure --prefix=/mingw-w64 --with-sysroot=/mingw64
make -j %NUMBER_OF_PROCESSORS%
make install