chore: refactor build system to use PCRE2 #3383
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what
This PR refactors the build system and the relevant source files to make the PCRE2 library as default. If you wish to continue building with the legacy PCRE library, you must explicitly specify it using the following command:
configure
--with-pcre
. Without that the default will be PCRE2.The PR also changes the GH worfklow build matrix.
why
Old PCRE library is deprecated, it's time to change to PCRE2.
references
See the same change in v3.
This PR is based on #3345, but that wasn't finished.