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Newsgroups: comp.os.msdos.djgpp
Date: Wed, 25 May 2022 10:53:10 -0700 (PDT)
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Subject: Re: GNU pth during djgpp build time?
From: "janezz55 (janezz55 AT gmail DOT com) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
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> Surprisingly, configuring gcc with --enable-threads is actually possible, but 
> it did require a small patch to Pth. The executables it produces however, will 
> not run. A thread-aware libgcc will try to lock a mutex in 
> __register_frame_info(), which is invoked from crt0 before __crt1_startup(). 
> But locking a mutex involves a whole series of libc functions that rely on 
> things like _dos_ds, which are only initialized from __crt1_startup(). 

patch libgcc? Why would it want to lock a mutex anyway?