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True post-build actions [message #1841671]

Tue, 25 May 2021 12:43

Joel Loyer

Messages: 2
Registered: May 2021

Junior Member

Hi,

I work on a C cross platform project using Eclipse 2020-06 (4.16.0) under Ubuntu 18.04..5.

The project is set to generate a flash image .bin from the .elf with the "Cross ARM GNU Create Flash Image" tools.

As I have an action to perform on the .bin file, I naively have added it in the post-build command.

After several trials, and a message always saying that the ".bin" file is missing, conclusion is that the post-build command is not a post-build command , but a post-elf-generation command.

How can I setup an automatic action as needed ?

Thanks for your help.

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Re: True post-build actions [message #1841794 is a reply to message #1841671]

Sun, 30 May 2021 07:41

David Vavra

Messages: 1426
Registered: October 2012

Senior Member

Actually, "post-build" is just another make target.
It has no prerequisites and is called as the last target of a make run.
When used, the makefile contains (using @echo "post build" as the post-build command):

all:  target-exe

target-exe:
	<link recipe>
	-$(MAKE) --no-print-directory post-build

post-build:
	-@echo "post build"
	-@echo ' '

Note that post-build is run at the end of the link step.
I would expect it should be used to create the bin file.

If you also have a pre-build step, the makefile becomes

all:
	$(MAKE) --no-print-directory pre-build
	$(MAKE) --no-print-directory main-build

Where "main-build" contains the recipe formerly used by "all".

You could run a batch file in the post-build that generates the bin then whatever else you want.

The makefile generated by CDT is more for run-of-the-mill builds.
You probably should consider writing your own makefile
or turn off makefile generation after the first build and modify the makefile.

This is for plain vanilla CDT.
If you are using a third party plugin then you should direct this question to its developers.

[Updated on: Sun, 30 May 2021 07:49]

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