On Wed, 2022-06-22 at 03:12 +0000, Ming Cheng wrote: > I downloaded the PDF and failed to find _target, _type. I must miss > you point. Please guide further.
What I'm saying is that the gcc-help mailing list is not the right place to ask for help understanding makefiles or using GNU make. gcc- help is for help with the GCC compiler. GNU make is a completely separate project, so you shouldn't be sending those questions to the GCC list. Instead you should send your questions about understanding makefiles or using GNU make only to the help-make@gnu.org mailing list, not the GCC list. As for your question, I didn't fully understand it so when you send questions to the help-make@gnu.org mailing list, please include an example of the part of the makefile that you don't understand, and/or the make command you typed, and/or the output you received that was not right, and explain why it wasn't what you expected and what you wanted to happen instead. Just to be clear, there is nothing built into GNU make that treats any files ending with "_target" or "_type" in any special way at all, so you won't find any reference to such a thing in the GNU make manual. If something special is happening with those targets then something in your makefiles is doing it. We cannot guess what that might be, with the information provided.