gn_args support?

[JerrySievert]

given that some embedders need to use different arguments that would normally be passed to gn gen, is there a mechanism for this?

I haven't been able to find any in the existing code other than the predefines in the cmake file. is this currently possible?

[bnoordhuis]

Not supported at the moment but flags can be added on a case-by-case basis (ex. v8_enable_i18n_support)

[JerrySievert]

thanks ben!

the biggest ones i see for plv8 are:

• is_component_build=false
• v8_use_external_startup_data=false

as noted before, v8_enable_i18n_support would be nice, we have a few users who have used it, but it's generally not used.

[bnoordhuis]

v8_use_external_startup_data should not be difficult.

is_component_build=false is basically what we have today, I think? is_component_build=true on the other hand is #60.