Eclipse Community Forums: C / C++ IDE (CDT) » Yocto Makefile.am doesn't not include new .c/.cpp files

Home » Language IDEs » C / C++ IDE (CDT) » Yocto Makefile.am doesn't not include new .c/.cpp files(Yocto ADT Autotools Project Makefile.am not adding new .c/.cpp files)

Yocto Makefile.am doesn't not include new .c/.cpp files [message #1773170]

Fri, 22 September 2017 11:30

Eclipse User

Hi,

I have Eclipse-SDK-4.2.2-linux-gtk_x86_64 version installed with Yocto ADT plugin.

When I create C++ project with Yocto ADT Autotools wizard, the created project compiles and runs without error.

But when I add a .cpp /.c file into the project src folder, and refresh/clean the project, and recompile the project, it generates errors. I found that any functions in the user added .cpp file or .c file, can not be called from, because the files are simply not linked into the target file. I have to manually add the added .cpp file into the Makefile.am in the src folder.

such as (MyNewAdded.c):
bin_PROGRAM = HelloWorld.c MyNewAdded.c

Why the generated Makefile.am doesn't automatically include the MyNewAdded.c?

How to fix it?

Thank you,

David Zhou

Re: Yocto Makefile.am doesn't not include new .c/.cpp files [message #1773206 is a reply to message #1773170]

Sun, 24 September 2017 04:32

Eclipse User

Unfortunately, there is no easy way to automate this.
The usual way to specify Makefile.am is

bin_PROGRAMS=Hello
Hello_SOURCES=Hello.c MyNewAdded.c

But you can have more than one executable. For instance

bin_PROGRAMS=Hello HelloWorld
Hello_SOURCES=Hello.c
HelloWorld_SOURCES=Hello.c

The autotools plugin would need to know which source files are needed for each executable.
It could just append it to all <exe>_SOURCES or perhaps just the first.
This may be fine for projects with single executables but potentially annoying for those with multiple executables.

That said, I've tried using wildcards such as: xxx_SOURCES=$(wildcard *.c)
but this confuses things and generates stuff like *.o instead of <file>.o

You could try writing a script (in say, Perl) that will modify the Makefile.am and it could even call automake and ./configure as well
FWIW: automake itself is a Perl script

[Updated on: Sun, 24 September 2017 09:26] by Moderator

Re: Yocto Makefile.am doesn't not include new .c/.cpp files [message #1773500 is a reply to message #1773206]

Thu, 28 September 2017 11:43

Eclipse User

Hi David Vavra,

Thank you for your explanation.

David

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