GNU bug report logs - #63365
30.0.50; GCC 13.1 breaks building Emacs with native-compilation

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Message #247 received at 63365 <at> debbugs.gnu.org (full text, mbox):

From: Cyril Arnould <cyril.arnould <at> outlook.com>
To: Andrea Corallo <acorallo <at> gnu.org>
Cc: "63365 <at> debbugs.gnu.org" <63365 <at> debbugs.gnu.org>,
 "eliz <at> gnu.org" <eliz <at> gnu.org>, 65727 <at> debbugs.gnu.org,
 Arash Esbati <arash <at> gnu.org>,
 András Svraka <svraka.andras <at> gmail.com>
Subject: Re: bug#65727: 30.0.50; Build failure in MSYS2 when
 --with-native-compilation
Date: Wed, 15 May 2024 20:45:45 +0200

[Message part 1 (text/plain, inline)]

> If you could also share the two preprocessed versions of thread.c would
> be of great help.  You should be able to do it adding to your original
> GCC invokation like "-E -o thread.i".

What I ended up doing was:

cd src
make thread.o -W thread.c CFLAGS='-g3 -O2 -gdwarf-2 
-Wno-error=implicit-function-declaration -E -o thread.i'

I hope this is what you were after. The addition of
'-Wno-error=implicit-function-declaration' comes from issue #70889
btw. I've also edited the "E:/Git/emacs-debug-gcc14/emacs" paths in
the thread.i files by hand so they don't show up in the diff; they
were originally compiled in two separate folders. The resulting files
are almost exactly the same:


diff -ubBw thread.i thread-attr-no-optimize-sibling-calls.i
--- thread.i    2024-05-15 20:34:08 +0000
+++ thread-attr-no-optimize-sibling-calls.i     2024-05-15 20:33:44 +0000
@@ -152355,12 +152355,13 @@

 }

+__attribute__((optimize("no-optimize-sibling-calls")))
 void
 mark_threads (void)
 {
   flush_stack_call_func (mark_threads_callback,
-# 1181 "thread.c" 3 4
+# 1182 "thread.c" 3 4
                                                ((void *)0)
-# 1181 "thread.c"
+# 1182 "thread.c"
                                                    );
 }

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