How to upgrade GCC complier from 4.8 to 4.9?

[HFong]

Hi,

I would like to upgrade GCC compliter from 4.8 to 4.9, however I cannot search for the command to upgrade this.

My gcc version is shown as per below:

root@edison:~# gcc --version

gcc (GCC) 4.8.2

Copyright (C) 2013 Free Software Foundation, Inc.

This is free software; see the source for copying conditions. There is NO

warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

May I know the command line in order to upgrade GCC complier from 4.8 to 4.9?

Thank you.

[idata · Accepted solution]

Hello cnvery,

Version 4.9.1 of GCC can be downloaded from AlexT's repo. In case you haven't set up the repo yet, go to http://alextgalileo.altervista.org/edison-package-repo-configuration-instructions.html http://alextgalileo.altervista.org/edison-package-repo-configuration-instructions.html to learn how to do it. Once the repo has been set, type the following commands:opkg updateopkg install gccThat should install GCC version 4.9.1. Let me know if it works.Peter.

[HFong]

Hi Peter,

Thanks for the reply.

It works perfectly!

The GCC version now is 4.9 version.

root@edison:~# gcc --version

gcc (GCC) 4.9.1

Copyright (C) 2014 Free Software Foundation, Inc.

This is free software; see the source for copying conditions. There is NO

warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[HFong]

Hi Peter,

May I know is there any way to restore back the GCC complier from 4.9.1 to 4.8.2?

When using GCC for 4.8.2 for compiling of Azure IoT SDK, it shows:

-- The C compiler identification is GNU 4.8.2

-- The CXX compiler identification is GNU 4.8.2

-- Check for working C compiler: /usr/bin/cc

-- Check for working C compiler: /usr/bin/cc -- works

-- Detecting C compiler ABI info

-- Detecting C compiler ABI info - done

-- Detecting C compile features

-- Detecting C compile features - done

-- Check for working CXX compiler: /usr/bin/c++

-- Check for working CXX compiler: /usr/bin/c++ -- broken

When using GCC for 4.9.1 for compiling of Azure IoT SDK, it shows:

-- The C compiler identification is GNU 4.9.1

-- The CXX compiler identification is unknown

-- Check for working C compiler: /usr/bin/cc

-- Check for working C compiler: /usr/bin/cc -- broken

Although gcc --version showed upgraded gcc (GCC) 4.9.1, but g++ --version showed g++ (GCC) 4.8.2.

This means gcc and g++ version are different.

Thank you.

[idata]

Hi cnvery,

In fact if you use the latest version of the image both GCC and G++ have been updated to version 4.9.1. However if you still would like to uninstall it, you can do it with the following command:opkg remove gcc --force-removal-of-dependent-packagesPeter.

[HFong]

Hi Peter,

The mentioned command line will remove only GCC 4.9.1 itself (= restore back to 4.8.2) or remove whole GCC complier?

Thank you.

[idata]

The line will remove the GCC compiler but you can install the version 4.8.2 if run the following lines:

echo "src intel-iotdk http://iotdk.intel.com/repos/1.1/iotdk/i586/ http://iotdk.intel.com/repos/1.1/iotdk/i586/" >> /etc/opkg/iotdk.confopkg updateopkg install gccPeter.

[HFong]

Hi Peter,

I have tried it out.

It still install back GCC 4.9.1.

After installation, "gcc --version" command showed "-sh: gcc: command not found".

Any idea on this?

Thank you.

[idata]

I'm sorry, it was my mistake, the command I posted above:

echo "src intel-iotdk http://iotdk.intel.com/repos/1.1/iotdk/i586/ http://iotdk.intel.com/repos/1.1/iotdk/i586/" >> /etc/opkg/iotdk.conf Should have been: echo "src intel-iotdk http://iotdk.intel.com/repos/1.1/iotdk/i586/ http://iotdk.intel.com/repos/1.1/iotdk/i586/" > /etc/opkg/iotdk.conf Try it and let me know if this time it works, I'll be waiting for your reply.Peter.

[HFong]

Hi Peter,

The command line does not change the version it installed.

It still install back GCC 4.9.1 and "gcc --version" command showed "-sh: gcc: command not found" after installation.

Thank you.

[idata]

If you keep receiving the message "-sh: gcc: command not found", I'd suggest you to reflash the Edison. Then you can follow these steps to install the 4.8.2 version of GCC manually (without using the repo):

1. opkg remove gcc --force-removal-of-dependent-packages2. wget http://iotdk.intel.com/repos/1.1/iotdk/i586/gcc_4.8.2-r0_i586.ipk http://iotdk.intel.com/repos/1.1/iotdk/i586/gcc_4.8.2-r0_i586.ipk3. opkg install gcc_4.8.2-r0_i586.ipk That should install version 4.8.2 on your board. Let me know if it works.Peter.