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Using mraa library on Eclipse IDE - Error Build [message #1809224]

Fri, 12 July 2019 02:08

Manh Ta Tuyen

Messages: 3
Registered: July 2019

Junior Member

Hi everyone,

I'm new to Eclipse IDE. I'm currently working on a example project which is hellomraa using mraa library as well as a cross - compiler to build an executable file on raspberry Pi 3. The problem I got is depicted in the following screenshot.

Hopefully anybody can help me solve this problem.

Thanks in advance.

Attachment: Capture.PNG
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Re: Using mraa library on Eclipse IDE - Error Build [message #1809279 is a reply to message #1809224]

Fri, 12 July 2019 17:04

David Vavra

Messages: 1426
Registered: October 2012

Senior Member

You are missing the libray(ies) containg the code fo fcntl and glo
Since youare ctosscompilinh I don't know what they are.
You'll have to find out then add the to your link.

Probably named libgcc but could be anything.

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Re: Using mraa library on Eclipse IDE - Error Build [message #1809312 is a reply to message #1809279]

Sat, 13 July 2019 02:47

Manh Ta Tuyen

Messages: 3
Registered: July 2019

Junior Member

Dear David Vavra,

Thanks for your reply.
I'm using GNU toolchain for Raspberry Pi GCC 4.6.3 from this link https://gnutoolchains.com/raspberry/

About the library I'm installing (building) into Raspberry Pi 3 platform following this link https://www.raspberrypi.org/forums/viewtopic.php?t=213363. After building library into shared object (.so file), I just copy all the files of the library to Windows laptop and deploy it.

And I've attached certain screenshots for what I config the project properties

[Updated on: Sat, 13 July 2019 03:12]

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Re: Using mraa library on Eclipse IDE - Error Build [message #1809314 is a reply to message #1809312]

Sat, 13 July 2019 05:04

David Vavra

Messages: 1426
Registered: October 2012

Senior Member

I guessed you did somthing similar.
Anything to do with includes is irrelevant

Only the compiler cares about them.
The linker wants object files.
They can stand alone or be kept in a library.

As I said, you are missing the library or libtaries
containing the functions fctnl and glob

If you are asking what they are or where,
I don't kmow.

You might want to direct your question to a
site dedicated to the Raspberry
Ask how to link.

[Updated on: Sat, 13 July 2019 05:33]

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Re: Using mraa library on Eclipse IDE - Error Build [message #1809328 is a reply to message #1809314]

Sat, 13 July 2019 08:38

Tauno Voipio

Messages: 742
Registered: August 2014

Senior Member

The missing functions are in the Linux base runtime C library, libc.

It seems to me that the mraa shared library refers to versions in an obsolete libc version.

--

Tauno Voipio

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Re: Using mraa library on Eclipse IDE - Error Build [message #1809342 is a reply to message #1809328]

Sat, 13 July 2019 16:31

Manh Ta Tuyen

Messages: 3
Registered: July 2019

Junior Member

@Tauno Voipio and David Vavra, the thing is the version of mraa I'm using (2.0.0) by does not work with the toolchain. I've tried the 1.7.0 one and it worked.

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