为什么当make代码中的命令抛出错误时make: *** No targets. Stop.
代码：
NAME := program
FLAG := -std=c11 -Wall -Wextra -Werror -Wpedantic
all: $(NAME)
$(NAME): *.c
clang $(FLAG) -o $(NAME) *.c -lm
clean:
rm -rf $(NAME)
reinstall: clean all
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