Re: Implicit rule for linking multiple object files

The first place to consult in understanding how to build your code is the documentation of your compiler. C++20 *module* support is very new in at least gcc and they have not provided direct guidance on how to use modules with 'make', at least I don't see any such guidance here: https://gcc.gnu.o

Re: Making makefiles with primarily phony targets more friendly

Jean-Baptiste Poittevin (10 August 2022 22:19) wrote: > By using a lot of PHONY targets, I think you're closing a door to one > make greatest feature : not redoing those things that are already up > to date. While that's entirely true of make's "design-basis" use-case, I am familiar with the mostl

?????? Implicit rule for linking multiple object files

Thanks Philip, I want to compile objects in order of the writting: y.o z.o x.o . The order of compiling x.o are different in below three cases. I don't understand the difference.  x : y.o z.o x.o  # compiles x.o last         $(CC) $^ -o $@  # with recipe x : y.o z.o      # compiles x.o last

Re: 回复： Implicit rule for linking multiple object files

> I want to compile objects in order of the writting Just because, today, make happens to pick nearly what you want it to do without being told about your ordering constraint, doesn't mean that you should rely on it continuing to do so. You should teach make about that order. You could contr

?????? ?????? Implicit rule for linking multiple object files

Thanks Martin, Your Makefile is too advanced for me to understand by now. I tested out the below five rules. Aren't the order of compiling object files of first two rules certain? Will GNU Make keep their ordering behavior or are they just some random ordering caused by some random bugs (sorry,

Re: 回复： 回复： Implicit rule for linking multiple object files

> Aren't the order of compiling object files of first two rules certain? No, it's unspecified. Earlier in this thread, you wrote: >> The manual states that the x.c compiles first. The example you're looking at just teaches that compiling x.c first is allowed. It doesn't teach that x.c will al

Re: 回复： 回复： Implicit rule for linking multiple object files

On Fri, 2022-08-12 at 02:37 +0800, ljh wrote: > Aren't the order of compiling object files of first two rules > certain? The POSIX standard for make mandates that prerequisites are tried by make in the order they are listed in the prerequisite list, with the exception that implicit rules will prep

Re: ?????? ?????? Implicit rule for linking multiple object files

Thanks Paul, I've learnt a lot from your mail.

Re: Making makefiles with primarily phony targets more friendly

On Wed, 2022-08-10 at 19:08 +, Katherine Pata wrote: > I often find myself using makefiles to handle things like project > linting, container images, various scripts, initiating tests, and > other misc tasks. Sometimes these include tasks that have real > dependencies that make should keep trac

Re: ?????? ?????? Implicit rule for linking multiple object files

Hi Paul, I use some example code which uses C++20 modules. There are five .cpp files, e.g: main.c  depends on a.c b.c c.c d.c b.c d.c depends on c.c a.c     depends on b.c d.c     depends on a.c I update my Makefile like the following. Is it correct and guaranteed to work under parallel make?