Hello all: After test from the qemu, I found a tilegx gcc issue, and file Bug71331 "target-tilegx: nested-function-4.c: r10 is conflict which is both in function frame and in parameter." The related link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71331 And I shall try to fix it within next month. Welcome any ideas, suggestions, and completions. Thanks. -- Chen Gang (陈刚) Managing Natural Environments is the Duty of Human Beings.