undefined symbol: php_json_serializable_ce

[syslogic]

Can build, but then: undefined symbol: php_json_serializable_ce.

PHP Warning: PHP Startup: Unable to load dynamic library 'decimal.so' (tried: /usr/lib64/php/modules/decimal.so (/usr/lib64/php/modules/decimal.so: undefined symbol: php_json_serializable_ce), /usr/lib64/php/modules/decimal.so.so (/usr/lib64/php/modules/decimal.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0

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Loading json.so before decimal.so seems to help; eg. /etc/php.d/98-json.ini and /etc/php.d/99-decimal.ini.

[rtheunissen]

See php-ds/ext-ds#2

[syslogic]

This is indeed exactly the same issue, but on CentOS/RHEL this works a tad different than on Ubuntu (there is no phpenmod command and therefore the module's priority needs to be defined manually, which is otherwise being picked up from the comment in the module's .ini on phpenmod). Changing the filename seems to be the only way to affect the loading order (unless loading two modules in one .ini file, which seems to be messy).