<lenovo@root 11:48:03> /cygdrive/d/liuhang/GitHub/rpi_linux/linux
$make help
1 [main] make 4472 child_info_fork::abort: C:cygwinincygiconv-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:cygwinincygiconv-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:cygwinincygiconv-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:cygwinincygiconv-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:cygwinincygiconv-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:cygwinincygiconv-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:cygwinincygiconv-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。
开始以为是刚装了curses导致的系统错乱，于是资源管理器杀死所有cygwin相关进程，如bash、mitty，甚至vim。重启cygwin，再试，不行，error依旧。
怀疑电脑内存出问题，于是重启电脑，再试，还是不行。
于是检查刚才安装的curses相关软件工具，发现装了一个64为的ncurses，而电脑是32位win7，于是果断卸载，再试，ok！！！