nios2-elf-gcc.exe: error: CreateProcess: No such file or directory

As a solution to the issue nios2-elf-gcc.exe: fatal error: cannot execute 'cc1': CreateProcess: No such file or directory we have found useful what follows.

Before running make.exe on the generated Makefile, add this to your bash script:

export WSLENV=PATH/l:${WSLENV}
sed -i 's/\(adjust-path[-mixed]*\) = .*/\1 = $1/' Makefile

WSLEN fixes missing pathnames, while sed basically removes the effect of adjust-path.

This is an issue introduced by a Windows update but I still believe Intel should provide a fix or patch for it. We wasted several days on it.