I got this error while installing Mplayer on Centos7.
This is the full error

libavutil/atomic.h:32:7: warning: "HAVE_ATOMICS_SUNCC" is not defined [-Wundef]
 #elif HAVE_ATOMICS_SUNCC
       ^
CC	libavutil/camellia.o
CC	libavutil/cast5.o
CC	libavutil/channel_layout.o
CC	libavutil/color_utils.o
CC	libavutil/cpu.o
libavutil/cpu.c:20:23: fatal error: stdatomic.h: No such file or directory
 #include 
                       ^
compilation terminated.
make[1]: *** [libavutil/cpu.o] Error 1
make[1]: Leaving directory `/root/mplayer/ffmpeg'
make: *** [ffmpeg/libavutil/libavutil.a] Error 2

Basically you have 2 options, 1/ upgrade gcc to 4.9 ( very long process ), or 2/ download stdatomic.h and add it into the package you’re installing. You definitely want to go with option no.2

Go here https://gist.github.com/nhatminhle/5181506 and download the file ( you get link in upper right corner – hit Raw button ).
And then look where is it used in the package you are installing

root@lj: mplayer# pwd
/root/mplayer

root@lj: mplayer# wget https://gist.githubusercontent.com/nhatminhle/5181506/raw/541482dbc61862bba8a156edaae57faa2995d791/stdatomic.h

root@lj: mplayer# find ./ -name "*.c" | xargs grep "stdatomic" -n
./ffmpeg/compat/atomics/pthread/stdatomic.c:27:#include "stdatomic.h"
./ffmpeg/libavutil/cpu.c:20:#include 

Open stdatomic.c on line 27 and cpu.c on line 20 and make following change, from

#include 

to

//#include 
#include 

That’s it – this is by far the easiest way to deal with this error.

CentOS can be real pain when it comes to permissions.
Even if you set 777 to a folder you still won’t be able to write to it in Apache.
You need to enable it on system level as well:

chcon -R -t httpd_sys_rw_content_t /var/www/vhosts/localhost/httpdocs/files/
chcon -R -t httpd_sys_content_t /var/www/vhosts/localhost/httpdocs/files/
chcon -R -t httpd_sys_content_rw_t /var/www/vhosts/localhost/httpdocs/files/

Now Apache will be able to write to /var/www/vhosts/localhost/httpdocs/files/ and all subfolders.

There’s no magical 1 command, you need to do this in steps for each program you would like to use.

Color nano

root@lj: /# git clone https://github.com/nanorc/nanorc.git
root@lj: /# cd nanorc
root@lj: /# make install

And add into ~/.nanorc

include ~/.nano/syntax/html.nanorc
include ~/.nano/syntax/css.nanorc
include ~/.nano/syntax/php.nanorc
include ~/.nano/syntax/ALL.nanorc

Bash color

Add into ~/.bashrc

PS1='\e[33;1m\u@\h: \e[31m\W\e[0m\$ '

Git color

root@lj: /# git config --global color.ui auto

Cat color

This unfortunately isn’t possible. There’s a way around it though.

root@lj: /# yum install python-pygments
root@lj: /# echo "alias dog='pygmentize -g -O style=colorful,linenos=1'" > ~/.bashrc

I’ve encountered following error when running mongodb php module

Dec 12 09:56:02 lj php-fpm[3142]: [12-Dec-2016 09:56:02] NOTICE: PHP message: PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/mongodb.so' - /usr/lib64/php/modules/mongodb.so: undefined symbol: php_json_serializable_ce in Unknown on line 0

Few google searches reveal this can be fixed by simply making sure json is loaded prior to mongodb.so – which by default isn’t.
There are many ways to do that, for example find how your json is loaded

[root@lj php.d]# php -i | grep "json"
/etc/php.d/json.ini,

Now open json.ini and add

extension=mongodb.so

at the end – and remove mongodb.ini from the folder.

Or rename json.ini to 20-json.ini and mongodb.ini to 30-mongodb.ini
You can also add priority at top of the ini file priority=30

Don’t forget to restart php after each change, if you are running mod_php, just do systemctl restart httpd, for php-fpm it’s systemctl restart php-fpm.

Now the weird thing is – none of this worked for me.
No matter how I loaded mongodb, it always failed with this error. I got the latest pecl packages, everything up to date – it simply didn’t work.
The only solution for me was to roll back to previous version of mongodb

[root@lj php.d]# pecl uninstall mongodb
[root@lj php.d]# pecl install mongodb-1.1.9
[root@lj php.d]# echo "extension=mongodb.so" > /etc/php.d/zz-99-mongo.ini

I called the file zz-99 to make sure it’s always loaded last. My ini files do not start with 20-*.ini to set priority.
Good luck.