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bug#45303: #45303 [feature/native-comp] building error on Windows
From: |
Andy Moreton |
Subject: |
bug#45303: #45303 [feature/native-comp] building error on Windows |
Date: |
Sat, 19 Dec 2020 21:39:58 +0000 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (windows-nt) |
On Sat 19 Dec 2020, Eli Zaretskii wrote:
>> From: Andy Moreton <andrewjmoreton@gmail.com>
>> Date: Sat, 19 Dec 2020 17:15:02 +0000
>>
>> > I must be missing something, because I don't see strsignal used on
>> > master in the MinGW build at all. Moreover, Gnulib's strsignal.c is
>> > not even in lib/. We call sigdescr_np instead. So I wonder how did
>> > you see that the Gnulib replacement for strsignal is used on master in
>> > the Windows build.
>>
>> Entirely possible that I have misunderstood something from reading
>> sources and grepping (the gnulib gyrations are hard to follow).
>>
>> The emacs source calls strsignal, and something provides it (whether via
>> a macro replacement or a linkable symbol). The only difference I could
>> see was the configure test, as noted above.
>
> The ultimate test is this:
>
> gdb ./emacs.exe
> GNU gdb (GDB) 10.1
> Copyright (C) 2020 Free Software Foundation, Inc.
> ...
> (gdb) rbreak strsignal
>
> On my system, I see just this:
>
> Breakpoint 2 at 0x119b88b: file sysdep.c, line 2617.
> const char *safe_strsignal(int);
Agreed, but emacs has to actually link before I can run it under GDB.
>> I see that src/syssignal.h has a replacement macro:
>>
>> #ifndef HAVE_STRSIGNAL
>> # define strsignal(sig) safe_strsignal (sig)
>> #endif
>>
>> So is the problem that on the native branch the configure test succeeds
>> and sets HAVE_STRSIGNAL, resulting in trying to link the wrong symbol ?
>
> Possibly. The question is, how come the test succeeds? Can you look
> in libjccjit.a with "nm -A" and see if it exports strsignal?
/c/home/ajm/tmp> nm -A /mingw32/lib/libgccjit.dll.a | grep strsignal
C:/msys64/mingw32/lib/libgccjit.dll.a:d025440.o:00000000 I __imp__strsignal
C:/msys64/mingw32/lib/libgccjit.dll.a:d025440.o:00000000 T _strsignal
/c/home/ajm/tmp> nm -A /mingw64/lib/libgccjit.dll.a | grep strsignal
C:/msys64/mingw64/lib/libgccjit.dll.a:d025724.o:0000000000000000 I
__imp_strsignal
C:/msys64/mingw64/lib/libgccjit.dll.a:d025724.o:0000000000000000 T strsignal
Yes, it would appear so.
AndyM
- bug#45303: 28.0.50; [feature/native-comp] comp.c compilation error on Windows 10, (continued)
- bug#45303: #45303 [feature/native-comp] building error on Windows, Pal Gloss, 2020/12/18
- bug#45303: #45303 [feature/native-comp] building error on Windows, Andrea Corallo, 2020/12/18
- bug#45303: #45303 [feature/native-comp] building error on Windows, Eli Zaretskii, 2020/12/18
- bug#45303: #45303 [feature/native-comp] building error on Windows, Pal Gloss, 2020/12/18
- bug#45303: #45303 [feature/native-comp] building error on Windows, Andrea Corallo, 2020/12/19
- bug#45303: #45303 [feature/native-comp] building error on Windows, Andy Moreton, 2020/12/19
- bug#45303: #45303 [feature/native-comp] building error on Windows, Eli Zaretskii, 2020/12/19
- bug#45303: #45303 [feature/native-comp] building error on Windows, Andy Moreton, 2020/12/19
- bug#45303: #45303 [feature/native-comp] building error on Windows, Eli Zaretskii, 2020/12/19
- bug#45303: #45303 [feature/native-comp] building error on Windows,
Andy Moreton <=
- bug#45303: #45303 [feature/native-comp] building error on Windows, Pal Gloss, 2020/12/19
- bug#45303: #45303 [feature/native-comp] building error on Windows, Andrea Corallo, 2020/12/19
- bug#45303: #45303 [feature/native-comp] building error on Windows, Andy Moreton, 2020/12/20
- bug#45303: #45303 [feature/native-comp] building error on Windows, Andrea Corallo, 2020/12/20
- bug#45303: #45303 [feature/native-comp] building error on Windows, Andrea Corallo, 2020/12/20
- bug#45303: #45303 [feature/native-comp] building error on Windows, Andy Moreton, 2020/12/20
- bug#45303: #45303 [feature/native-comp] building error on Windows, Andrea Corallo, 2020/12/21
- bug#45303: #45303 [feature/native-comp] building error on Windows, Andrea Corallo, 2020/12/21
- bug#45303: #45303 [feature/native-comp] building error on Windows, Andy Moreton, 2020/12/21
- bug#45303: #45303 [feature/native-comp] building error on Windows, Pal Gloss, 2020/12/20