Since one depender has multiple dependees, depend makefile generated
same depender line by line, to reduce file size and refine make file
parse speed, merge same dependers to one. And add a testcase for
large depend.make which generated source file includes 20000 header
files and run build and incremental build
Signed-off-by: Wangkai <wangkai86@huawei.com>
Signed-off-by: Zhaoyingdong <zhaoyingdong@huawei.com>
Otherwise an #include directive on the first line of a source file is
ignored if the file contains a Byte-Order-Mark.
Suggested-by: Aleksey Konovalov <konovalov.aleks@gmail.com>
Kai Wang