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bug#61988: error compiling emacs
From: |
Po Lu |
Subject: |
bug#61988: error compiling emacs |
Date: |
Tue, 07 Mar 2023 08:34:18 +0800 |
User-agent: |
Gnus/5.13 (Gnus v5.13) |
Eli Zaretskii <eliz@gnu.org> writes:
> reopen 61988
> thanks
>
>> From: Po Lu <luangruo@yahoo.com>
>> Cc: utomei@tiscali.it, 61988-done@debbugs.gnu.org
>> Date: Mon, 06 Mar 2023 21:43:06 +0800
>>
>> Eli Zaretskii <eliz@gnu.org> writes:
>>
>> >> From: Po Lu <luangruo@yahoo.com>
>> >> Cc: 61988@debbugs.gnu.org, Eli Zaretskii <eliz@gnu.org>
>> >> Date: Mon, 06 Mar 2023 18:35:05 +0800
>> >>
>> >> >> - WEBP_MODULE="libwebpdemux >= $WEBP_REQUIRED"
>> >> >> + WEBP_MODULE="libwebpdemux >= $WEBP_REQUIRED libwebpdecoder >=
>> >> >> $WEBP_REQUIRED"
>> >> >> EMACS_CHECK_MODULES([WEBP], [$WEBP_MODULE])
>> >> >> AC_SUBST([WEBP_CFLAGS])
>> >> >>
>> >> >> Everyone else, make sure to link to *EVERYTHING* that you depend on,
>> >> >> not
>> >> >> just one library that happens to link to everything you depend on.
>> >> >> Thanks.
>> >>
>> >> Thanks. Eli, is this safe for Emacs 29?
>> >
>> > Yes, thanks.
>>
>> Thanks, I installed the patch and am closing this bug.
>
> Sorry, I wasn't paying close attention, and though that you are adding
> libwebpdemux. With linwebpdecoder, the test fails on my system, since
> libwebpdecoder is not installed and neither is its pkg-config file.
> And is not needed: we don't use any API from that library, AFAICT.
>
> So I've reverted that change for now, and I'm reopening the bug.
>
> I'd like to know why requiring libwebpdecoder is essential for the
> build to work on the OP's system. It isn't on mine, and if you look
> at init_webp_functions, you will see that on Windows we load functions
> only from libwebp and libwebpdemux. Why is the third library needed?
It is here, because Emacs needs the function ``WebPGetInfo'', and on
GNU/Linux systems that function is in libwebpdecoder.so:
libwebpdecoder.so.3.1.5: file format elf64-x86-64
[...]
000000000000a160 g DF .text 00000000000000a1 Base WebPGetInfo
and here, I have a pkg-config file named libwebpdecoder.pc
prefix=/usr
exec_prefix=${prefix}
libdir=${prefix}/lib64
includedir=${prefix}/include
Name: libwebpdecoder
Description: Library for the WebP graphics format (decode only)
Version: 1.2.4
Cflags: -I${prefix}/include
Libs: -L${prefix}/lib64 -lwebpdecoder
Libs.private: -lm
while the pkg-config file for libwebpdemux only links to -lwebpdemux,
not -lwebpdecoder.
GNU ld does not allow you to link to symbols in dependencies of shared
libraries, so asking for libwebpdemux while using symbols in
libwebpdecoder does not work.
- bug#61988: error compiling emacs, Ugo Tomei, 2023/03/05
- bug#61988: error compiling emacs, Eli Zaretskii, 2023/03/05
- bug#61988: error compiling emacs, Po Lu, 2023/03/05
- bug#61988: error compiling emacs, Ugo Tomei, 2023/03/06
- bug#61988: error compiling emacs, Po Lu, 2023/03/06
- bug#61988: error compiling emacs, Eli Zaretskii, 2023/03/06
- bug#61988: error compiling emacs, Po Lu, 2023/03/06
- bug#61988: error compiling emacs, Eli Zaretskii, 2023/03/06
- bug#61988: error compiling emacs,
Po Lu <=
- bug#61988: error compiling emacs, Eli Zaretskii, 2023/03/06
- bug#61988: error compiling emacs, Po Lu, 2023/03/07
- bug#61988: error compiling emacs, Eli Zaretskii, 2023/03/07
- bug#61988: R: bug#61988: error compiling emacs, Ugo Tomei, 2023/03/07
- bug#61988: error compiling emacs, Eli Zaretskii, 2023/03/07
- bug#61988: R: bug#61988: error compiling emacs, Ugo Tomei, 2023/03/07
- bug#61988: error compiling emacs, Eli Zaretskii, 2023/03/07
- bug#61988: error compiling emacs, Eli Zaretskii, 2023/03/07
- bug#61988: R: bug#61988: error compiling emacs, Ugo Tomei, 2023/03/07
- bug#61988: error compiling emacs, Eli Zaretskii, 2023/03/07