How can I get more detailed output to debug a 'makefile.win' build error in Dev-C++?

Always thoroughly examine the 'Compile Log' window within Dev-C++; it contains specific compiler/linker commands and error messages. For more advanced debugging, you can open a command prompt in your project directory (after setting up your PATH to include MinGW's bin folder) and manually run 'mingw32-make.exe -f makefile.win' or 'make -f makefile.win'. Sometimes, adding a '-d' flag for debug info to the make command can provide very verbose output, though Dev-C++ GUI doesn't offer a direct 'verbose make' option.