How to check whether Global Register for opline and execute_data is open or not

1. Background of the problem: recently, it has been almost exclusively said on php7, that only php7 compiled with GCC 4.8 will open Global Register for opline and execute_data

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2. Question description:
Q: what is
1Global Register for opline and execute_data?
2 how do I check whether Global Register for opline and execute_data is enabled? (for example, using yum installation)

Feb.26,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-40ad65d-35eb.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-40ad65d-35eb.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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