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Date: Tue, 3 Jan 2023 21:34:02 +0000
From: Joseph Myers <joseph@codesourcery.com>
To: Iain Sandoe <iain@sandoe.co.uk>
CC: Gaius Mulley <gaiusmod2@gmail.com>, GCC Patches <gcc-patches@gcc.gnu.org>,
	"<ro@cebitec.uni-bielefeld.de>" <ro@CeBiTec.Uni-Bielefeld.DE>
Subject: Re: [PATCH] Darwin, crts: Provide scalb and significand as a crt
 [PR107631]
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On Tue, 3 Jan 2023, Iain Sandoe wrote:

>  1. Modula-2 should not forward the builtins unless the target supports them,
>     either by expansion or the relevant lib functions.  So that would need some
>    configury and conditional build code.

Note that such configure tests could only readily be in the library 
configure scripts, not in the compiler configure scripts - you can't do 
target compile or link tests in host-side configure.  (To a limited extent 
it's possible to grep target headers in host-side configure, though not to 
actually preprocess them since the compiler required for such 
preprocessing doesn't exist at that point.)

-- 
Joseph S. Myers
joseph@codesourcery.com