After installing MSYS2 installer 32bit for Windows 10, I followed the instructions given on http://scipy.github.io/devdocs/building/windows.html#building-openblas to build OpenBLAS. After an apparent successful installation, I open a MSYS2 MinGW terminal and type the following: pacman -S --needed base-devel mingw-w64-i686-toolchain mingw-w64-i686-cmake git. I got the error message:
MSYS ~ $ pacman -S --needed base-devel mingw-w64-i686-toolchain mingw-w64-i686-cmake git error: mingw32: key "5F944B027F7FE2091985AA2EFA11531AA0AA7F57" is unknown :: Import PGP key 5F944B027F7FE2091985AA2EFA11531AA0AA7F57? [Y/n] y error: key "5F944B027F7FE2091985AA2EFA11531AA0AA7F57" could not be looked up remotely error: mingw64: key "5F944B027F7FE2091985AA2EFA11531AA0AA7F57" is unknown :: Import PGP key 5F944B027F7FE2091985AA2EFA11531AA0AA7F57? [Y/n] ????????????????????????????????????????????????
This error occurs throughout using other command: pacman -Syu.
The version of MSYS2 installed is:
Mintty 3.1.4 (i686 -pc-msys) Created by Andy Koppe/Thomas Wolff
Any suggestions are welcome and appreciated for assistance to resolve the issue.