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Eclipse, how to generate "auto/update-makefile" for a project [message #1820525]

Wed, 22 January 2020 07:16

Elie Costa

Messages: 1
Registered: January 2020

Junior Member

I'm new to eclipse, I would like to know if it's possible to update a makefile automatically on Eclipse.

If I create a new project, "test.cpp", a makefile is generated and that's correct. But if I add a new class in this project, we have to update the makefile or Eclipse can manage it? Because when I test it, I get a "recipe for taget 'test' failed" error

What i did (for this example) is created a new "Exectuable->Empty Project" and added a new class to this project

Thanks you I hope it will help beginners like me

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Re: Eclipse, how to generate "auto/update-makefile" for a project [message #1820609 is a reply to message #1820525]

Thu, 23 January 2020 20:50

David Vavra

Messages: 1426
Registered: October 2012

Senior Member

Configuring an empty project can be a daunting task.
Suggest you delete the project then create an HelloWorld project
and rename/modify/add source files.

Eclipse will update the makefile on every build.

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Re: Eclipse, how to generate "auto/update-makefile" for a project [message #1820628 is a reply to message #1820525]

Fri, 24 January 2020 02:19

Helen Keller

Messages: 173
Registered: June 2019

Senior Member

Thanks for asking this.
Just a comment.

In MY view - the relations between make, complier and IDE is something very seldom discussed.
(some may find it too obvious )
And IDE is hiding the whole process very well too.

Sort of - "who is on first..." dilemma.
Cheers

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Re: Eclipse, how to generate "auto/update-makefile" for a project [message #1820631 is a reply to message #1820628]

Fri, 24 January 2020 04:34

David Vavra

Messages: 1426
Registered: October 2012

Senior Member

Eclipse is pretty much like any other IDE.
It gives you a way to organize projects and build them.
It really is just an editor combined with interfaces to various tools.

Eclipse builds a project by executing make or a similar tool.
Make is a tool that produces files in topological order.
The concept has been around for 50 some years.

Eclipse supplies the ability to configure some rudimentary rules for make.
In doing so it needs information about tools employed by make.
Those are compilers, linkers, etc that generate files.

The fundamental assumption in Eclipse is the user knows how make works.
Along with knowing how to build a project in general.
Using Eclipse as a black box is a lot like buying a house
with a well equipped kitchen then expecting to be able to cook without prior experience.

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