Package Base Details: gcc6

Git Clone URL: (read-only, click to copy)
Submitter: Svenstaro
Maintainer: valandil
Last Packager: valandil
Votes: 20
Popularity: 0.002800
First Submitted: 2018-05-17 20:56
Last Updated: 2021-06-05 01:08

Pinned Comments

valandil commented on 2020-08-24 15:06

I highly recommend building this package in a clean chroot. This avoids the use of a AUR helper, which sometimes uses /tmp as the stating directory, which often gets filled completely by gcc's build process.

It also provides a clean environment, which minimizes interactions between your current environment and gcc's build process.

Latest Comments

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dviktor commented on 2019-02-24 18:09

@yeahren just checked - download is fine. Maybe your ISP blocking some sites?

yeahren commented on 2019-02-24 13:22

ERROR: Failure while downloading

and is fine

dviktor commented on 2019-02-13 23:52

Should be fixed now

lonaowna commented on 2019-02-13 22:15

@dviktor, sorry for the late response. I don't really use gcc6 anymore and unfortunately I don't have the time to look at this. I've transferred maintainership to you. Good luck!

dviktor commented on 2019-02-08 22:22

Why is not in the /usr/lib/gcc/x86_64-pc-linux-gnu/6.5.0?

Checking with ldd says that I'm still linked to the /usr/lib/ while needed library is in /usr/lib/gcc/x86_64-pc-linux-gnu/lib

Just compared with community gcc7-libs package - they are moving libraries to the proper place by hand

lonaowna commented on 2019-01-13 10:36

@berquist you have two options:

1) run export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/lib/gcc/x86_64-pc-linux-gnu/6.5.0 before you execute the program

2) create /etc/ with the following contents:


And then run ldconfig as root, it should be fixed.

Maybe I should add this file to the package but I'm not sure if it may have unintended side-effects.

berquist commented on 2019-01-13 05:09

Something is wrong with the library path for gfortran. Try compiling this program:

      WRITE(*,*) 'Here is some text'
gfortran-6 main.F
$ ldd a.out (0x00007fff153be000) => not found => /usr/lib/ (0x00007f707c647000) => /usr/lib/ (0x00007f707c62d000) => /usr/lib/ (0x00007f707c5ea000) => /usr/lib/ (0x00007f707c426000)
        /lib64/ => /usr/lib64/ (0x00007f707c7fd000)

bidulock commented on 2018-11-17 23:23

I spent some time getting gcc6 to build gcj with an complete java 5 environment. A PKGBUILD for a 6.5.0-2 based on 6.5.0-1 is here:

That PKGBUILD builds without issue in a clean chroot for both x86_64 and i686 architectures.

Would it be possible to review these changes and incorporate them into gcc6?

ElektrikAkar commented on 2018-11-07 12:24


Thanks a lot, unfortunately I have tried these steps and installed different versions of compilers (4.9, 4.9.3, 5, 6.4, 7 etc.) However, MATLAB did not even accept gcc6.4 (from gcc63-multilib). I have edited "mex_C++_glnxa64.xml" and the output is below. Lastly, I also tried to compile 6.3.0 from source but it gives an error called "error 2". Therefore, I am a bit out of options. Is there a way to make this library to give 6.3 version when it requested -dumpversion :)

mex -setup C++ -v

Verbose mode is on.

... Looking for compiler 'g++' ...

... Executing command 'which g++' ...Yes ('/bin/g++').

... Executing command 'g++' ...Yes ('/usr/lib/').

... Executing command 'g++ -dumpversion' ...Yes ('8.2.1').

... Executing command 'which g++' ...Yes ('/bin/g++').

... Looking for folder '' ...No.

Did not find installed compiler 'g++'.

... Looking for compiler 'gcc-6' ...

... Executing command 'which gcc-6' ...Yes ('/bin/gcc-6').

... Executing command 'gcc-6' ...Yes ('/usr/lib/gcc/x86_64-pc-linux-gnu/6.5.0/').

... Executing command 'gcc-6 -dumpversion' ...Yes ('6.5.0').

... Executing command 'which gcc-6' ...Yes ('/bin/gcc-6').

... Looking for folder '' ...No.

Did not find installed compiler 'gcc-6'.

... Looking for compiler 'g++-6' ...

... Executing command 'which g++-6' ...Yes ('/bin/g++-6').

... Executing command 'g++-6' ...Yes ('/usr/lib/gcc/x86_64-pc-linux-gnu/6.5.0/').

... Executing command 'g++-6 -dumpversion' ...Yes ('6.5.0').

... Executing command 'which g++-6' ...Yes ('/bin/g++-6').

... Looking for folder '' ...No.

Did not find installed compiler 'g++-6'.

Error using mex

No supported compiler was found. For options, visit

lonaowna commented on 2018-11-05 14:32

@ElektrikAkar no, this is 6.5.0, which should be compatible with all 6.x.x releases as it just adds some bugfixes.

Did you try editing mex_C_glnxa64.xml as described here? (for this package use Location="/usr/bin/gcc-6")

Edit: depending on your MATLAB version maybe follow this instead. (use CC='gcc-6' and CXX='g++-6')