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

[Eli Zaretskii]

> 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 A newer version of the shared library including the entry point might be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install a newer version of the DLL that does.