Installing a Debug Build of PHP does not work about setup-php

[shivammathur]

php -i | grep Debug says no, as it is built without --enable-debug, but with -g in CFLAGS.

From that build dh_strip removes the debug symbols, so they can be packaged separately, this way it does not need to be built twice. All packaging for Debian is done similarly.

When debug is set to true, it adds those stripped debug symbols to /var/lib/debug/.build-id directory. Tools like objdump and gdb should pick debuginfo from there.

Test workflow: https://github.com/shivammathur/test-setup-php/actions/runs/7875037633/workflow

[TimWolla]

I see. Calling it a “Debug Build Setup” without it actually being a Debug Build of PHP certainly was confusing to me.

Do you plan to provide actual Debug Builds with your Action? If not, I would suggest adding a clarification to the README that the “Debug Build Setup” will just install the debug symbols.

Or perhaps it would make sense to always install the debug symbols, GitHub Actions is for testing and debugging after all and having symbols available at all times certainly would not hurt.

[shivammathur]

I have tried to improve the documentation for this in 1a5ac4a but switching to debug by default would mean the build size would increase by 3 to 5 times for all, while a very few CI workflows use debug.
Ref: https://github.com/shivammathur/php-ubuntu/releases/tag/builds