PECL yaml in PHP7

Question

Having some issues with pecl yaml in PHP7 (see below for error log). What I can see on: https://pecl.php.net/package/yaml is that there's some RC's for 2.0 that is suppose to cover the issue... I'm currently running the command:

pecl install yaml && echo "extension=yaml.so" > /usr/local/etc/php/conf.d/ext-yaml.ini. 

But guess this won't install the RC version. How do I install the RC? is there a parameter to supply maybe..?

I could google the following solution (not tested):

pear config-set preferred_state beta

But I guess that this will set a global beta state for all extensions. I only want to install this extension as beta..

---

Error log

running: make
/bin/bash /tmp/pear/temp/pear-build-defaultuserPVGidl/yaml-1.2.0/libtool --mode=compile cc  -I. -I/tmp/pear/temp/yaml -DPHP_ATOM_INC -I/tmp/pear/temp/pear-build-defaultuserPVGidl/yaml-1.2.0/include -I/tmp/pear/temp/pear-build-defaultuserPVGidl/yaml-1.2.0/main -I/tmp/pear/temp/yaml -I/usr/local/include/php -I/usr/local/include/php/main -I/usr/local/include/php/TSRM -I/usr/local/include/php/Zend -I/usr/local/include/php/ext -I/usr/local/include/php/ext/date/lib  -DHAVE_CONFIG_H  -g -O2   -c /tmp/pear/temp/yaml/yaml.c -o yaml.lo
mkdir .libs
 cc -I. -I/tmp/pear/temp/yaml -DPHP_ATOM_INC -I/tmp/pear/temp/pear-build-defaultuserPVGidl/yaml-1.2.0/include -I/tmp/pear/temp/pear-build-defaultuserPVGidl/yaml-1.2.0/main -I/tmp/pear/temp/yaml -I/usr/local/include/php -I/usr/local/include/php/main -I/usr/local/include/php/TSRM -I/usr/local/include/php/Zend -I/usr/local/include/php/ext -I/usr/local/include/php/ext/date/lib -DHAVE_CONFIG_H -g -O2 -c /tmp/pear/temp/yaml/yaml.c  -fPIC -DPIC -o .libs/yaml.o
In file included from /tmp/pear/temp/yaml/yaml.c:35:0:
/tmp/pear/temp/yaml/php_yaml.h:56:40: fatal error: ext/standard/php_smart_str.h: No such file or directory
 #include <ext/standard/php_smart_str.h>
                                        ^
compilation terminated.
Makefile:195: recipe for target 'yaml.lo' failed
make: *** [yaml.lo] Error 1
ERROR: `make' failed

Answer 1

On ubuntu 16.04 (PHP 7.0), you can do this :

apt install libyaml-dev php-dev php-pear
pecl install yaml-2.0.0
echo "extension=yaml.so" > /etc/php/7.0/cli/conf.d/20-yaml.ini
echo "extension=yaml.so" > /etc/php/7.0/apache2/conf.d/20-yaml.ini

• php-pear is needed to use the pecl command
• php-dev is needed for the phpize command (used by pecl)
• libyaml-dev is needed for... the yaml library