Solve the error of compiling automake project in cygwin

Compiling open source project on cygwin platform, running configure script encounters the following error:

configure: error: cannot guess build type; you must specify one

Solution:

1. Check the current automake version

$ automake --version
automake (GNU automake) 1.16.5

Show the current version is 1.16.5

1. Enter /usr/share to find the automake directory with version 1.16.5
2. Copy the config.guess and config.sub files in the automake directory to the source directory

cp /usr/share/automake-1.16/config.guess /src

cp /usr/share/automake-1.16/config.sub /src

3. Enter the source directory and run config.guess to get the platform

$ ./config.guess
x86_64-pc-cygwin

4. Run configure

./configure --build=x86_64-pc-cygwin

5. Run make