Re: Native compiler - passing command line options to C compiler

[Andrea Corallo]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Andrea Corallo <akrl@sdf.org>
>> Cc: Arthur Miller <arthur.miller@live.com>, emacs-devel@gnu.org
>> Date: Mon, 30 Aug 2021 12:59:45 +0000
>> 
>> I think this "defined (WINDOWSNT)" should be there so that compiling on
>> Windows the check over "gcc_jit_context_add_command_line_option" it is
>> always compiled even in case the libgccjit.h provided at compile time
>> does not define
>> 'LIBGCCJIT_HAVE_gcc_jit_context_add_command_line_option'.
>> 
>> A newer version of the shared library including the entry point might be
>> provided later on and will be used at runtime.
>
> You cannot use a libgccjit.dll of a version for which Emacs was not
> compiled, unless it is binary-compatible.  If Emacs was linked against
> libgccjit.dll that didn't support
> gcc_jit_context_add_command_line_option, then it would not work to
> install a newer version of the DLL that does.

Okay, I thought on Windows worked differently and we could handle the
case of a symbol not available at compile time but at runtime.  In the
light of this we can probably perform some more clean-up.

Thanks

  Andrea