<lenovo@root 11:48:03> /cygdrive/d/liuhang/GitHub/rpi_linux/linux
$make help
1 [main] make 4472 child_info_fork::abort: C:\cygwin\bin\cygiconv-2.dll: Loaded to different address: parent(0x2D0000) != child(0x440000)
make: Makefile:225: fork: Resource temporarily unavailable
1 [main] make 4920 child_info_fork::abort: C:\cygwin\bin\cygiconv-2.dll: Loaded to different address: parent(0x2D0000) != child(0x4B0000)
make: Makefile:304: fork: Resource temporarily unavailable
Makefile:610: arch//Makefile: No such file or directory
2 [main] make 5968 child_info_fork::abort: C:\cygwin\bin\cygiconv-2.dll: Loaded to different address: parent(0x2D0000) != child(0x440000)
make: Makefile:669: fork: Resource temporarily unavailable
1 [main] make 2496 child_info_fork::abort: C:\cygwin\bin\cygiconv-2.dll: Loaded to different address: parent(0x2D0000) != child(0x440000)
make: Makefile:691: fork: Resource temporarily unavailable
1 [main] make 5992 child_info_fork::abort: C:\cygwin\bin\cygiconv-2.dll: Loaded to different address: parent(0x2D0000) != child(0x440000)
make: Makefile:707: fork: Resource temporarily unavailable
1 [main] make 4996 child_info_fork::abort: C:\cygwin\bin\cygiconv-2.dll: Loaded to different address: parent(0x2D0000) != child(0x440000)
make: Makefile:754: fork: Resource temporarily unavailable
1 [main] make 3592 child_info_fork::abort: C:\cygwin\bin\cygiconv-2.dll: Loaded to different address: parent(0x2D0000) != child(0x440000)
make: Makefile:769: fork: Resource temporarily unavailable
make: *** No rule to make target 'arch//Makefile'。 停止。
開始以為是剛裝了curses導致的系統錯亂，於是資源管理器殺死所有cygwin相關進程，如bash、mitty，甚至vim。重啟cygwin，再試，不行，error依舊。
懷疑電腦內存出問題，於是重啟電腦，再試，還是不行。
於是檢查剛才安裝的curses相關軟件工具，發現裝了一個64為的ncurses，而電腦是32位win7，於是果斷卸載，再試，ok！！！