Cross-compilation Linux->Windows

[DrDub]

Hello!

I'm interested in generating an extension .DLL from a Linux box. (Why? Because it is good to be able to support Windows users without having to install windows altogether.)

Using MingW64 and running

./configure --prefix=/usr/bin/i686-w64-mingw32 --host=i686-w64-mingw32 --build=i686-linux

On a Debian box works and produces a Makefile that attempts to compile code. But of course the extension code is targeting Linux so it doesn't work.

I would like to hear your ideas of how Zephir can be run under Linux to generate the Windows stub.

( Assuming the machine has the Windows php dev package from https://windows.php.net/download/ )

Any help will be most welcomed!

[Jeckerson]

Try to configure win environment how it was done here -

zephir/.github/workflows/build-win-ext/action.yml

Line 45 in cc7ecd3

- name: Setup Prerequisites

[DrDub]

Thanks for your kind reply!

It turns out that PHP is built using MSVC and it doesn't support MingGW as a compiler. That means that extensions need to adhere to __vectorcall calling conventions for all the API marked as "ZEND_FASTAPI" (which are tons of them). But __vectorcall is not yet supported in GCC:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89485

(This appears in the compiler errors as "undefined reference to __imp_new_array" because the php8ts.lib contains the symbol _new_array@@8 instead of _new_array, the mangled @@8 refers to the __vectorcall.)