Make configure compatible with PHP 7.4

[ausi]

This is a followup to #29 using separate config files as requested by @BanzaiMan

[ausi]

The libonig issue still needs to be resolved I think.

#29 (comment)

the build is now likely to fail due to a missing libonig dependency.

@BanzaiMan To get an additional dependency, would it be sufficient to install libonig-dev in .travis.yml, or would this result in a missing shared object dependency when the built binary is used? That is, does something additional need to be done to make sure that the necessary SO is also present in the container/VM in some manner?

[joshk]

Due to the use of :

$TRAVIS_BUILD_DIR/default_configure_options.${RELEASE}

in the install files, and the use of default_configure_options.trusty-master style configure files, it might be best to use the custom_configure_options file and then add them to the default file used.

[nikic]

Why are you disabling PEAR on master? It should be compatible with PHP 8. At least the Console_GetOpt issue you're referencing was fixed a few weeks ago.

[joshk]

hey @nikic, I did lots of testing but it seems as though the version of Console_Getopt packaged in PEAR is old and does not include the each() fix.

[nikic]

Doesn't this one also need all the version specific variations, at least for baseline, 7.4, master? (Which is also the reason why I still think that #29 is a more scalable solution to this problem.)

[joshk]

sorry, i borrowed this from the xenial base line default for my testing.

[nikic]

@joshk Just tested this locally and you are absolutely right. This must be a recent regression as this was working a few days ago :/ I'll try to get this fixed.

[joshk]

awesome, thanks @nikic
I spent a lot of time hunting it down and then seeing if I could build an updated release locally, but since PEAR needs PEAR to build PEAR, I was a bit stuck.

[joshk]

I have to admit that I hijacked this PR a little to test some build system improvements. Once this gets merged in I can create a PR with my tweaks.
(this will make it easier to build other OS versions)

[BanzaiMan]

What are these trailing slashes for?

[nikic]

Forgot to report back here, the go-pear.phar issue has been resolved (again...) so it should be fine to also install on master.

[nikic]

Also in the meantime --enable-maintainer-zts has become --enable-zts on master.