Your message dated Wed, 11 Mar 2026 23:45:39 +0100
with message-id <[email protected]>
and subject line Re: wlroots: FTBFS with glibc 2.43 due to ISO C23 const return
types
has caused the Debian Bug report #1128759,
regarding wlroots: FTBFS with glibc 2.43 due to ISO C23 const return types
to be marked as done.
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If this is not the case it is now your responsibility to reopen the
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--
1128759: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1128759
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Source: wlroots
Version: 0.19.2-1
Severity: important
Tags: ftbfs upstream
Justification: fails to build from source
User: [email protected]
Usertags: glibc-2.43
Dear maintainer(s),
wlroots fails to build from source with glibc 2.43, currently in
experimental. From the build log:
| [371/398] cc -Ilibwlroots-0.19.so.p -I. -I.. -Iinclude -I../include
-Iprotocol -Irender/gles2/shaders -Irender/vulkan/shaders -Ibackend/drm
-I/usr/include/libdrm -I/usr/include/pixman-1 -fdiagnostics-color=always
-D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -Werror -std=c23
-D_POSIX_C_SOURCE=200809L -DWLR_USE_UNSTABLE -DWLR_PRIVATE=
-DWLR_LITTLE_ENDIAN=1 -DWLR_BIG_ENDIAN=0 -Wundef -Wlogical-op
-Wmissing-include-dirs -Wold-style-definition -Wpointer-arith -Winit-self
-Wstrict-prototypes -Wimplicit-fallthrough=2 -Wendif-labels -Wstrict-aliasing=2
-Woverflow -Wmissing-prototypes -Walloca -Wno-missing-braces
-Wno-missing-field-initializers -Wno-unused-parameter -fmacro-prefix-map=../=
-g -O2 -Werror=implicit-function-declaration
-ffile-prefix-map=/build/reproducible-path/wlroots-0.19.2=.
-fstack-protector-strong -fstack-clash-protection -Wformat
-Werror=format-security -mbranch-protection=standard -Wdate-time
-D_FORTIFY_SOURCE=2 -fPIC -pthread -MD -MQ
libwlroots-0.19.so.p/xcursor_xcursor.c.o -MF
libwlroots-0.19.so.p/xcursor_xcursor.c.o.d -o
libwlroots-0.19.so.p/xcursor_xcursor.c.o -c ../xcursor/xcursor.c
| FAILED: [code=1] libwlroots-0.19.so.p/xcursor_xcursor.c.o
| cc -Ilibwlroots-0.19.so.p -I. -I.. -Iinclude -I../include -Iprotocol
-Irender/gles2/shaders -Irender/vulkan/shaders -Ibackend/drm
-I/usr/include/libdrm -I/usr/include/pixman-1 -fdiagnostics-color=always
-D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -Werror -std=c23
-D_POSIX_C_SOURCE=200809L -DWLR_USE_UNSTABLE -DWLR_PRIVATE=
-DWLR_LITTLE_ENDIAN=1 -DWLR_BIG_ENDIAN=0 -Wundef -Wlogical-op
-Wmissing-include-dirs -Wold-style-definition -Wpointer-arith -Winit-self
-Wstrict-prototypes -Wimplicit-fallthrough=2 -Wendif-labels -Wstrict-aliasing=2
-Woverflow -Wmissing-prototypes -Walloca -Wno-missing-braces
-Wno-missing-field-initializers -Wno-unused-parameter -fmacro-prefix-map=../=
-g -O2 -Werror=implicit-function-declaration
-ffile-prefix-map=/build/reproducible-path/wlroots-0.19.2=.
-fstack-protector-strong -fstack-clash-protection -Wformat
-Werror=format-security -mbranch-protection=standard -Wdate-time
-D_FORTIFY_SOURCE=2 -fPIC -pthread -MD -MQ
libwlroots-0.19.so.p/xcursor_xcursor.c.o -MF
libwlroots-0.19.so.p/xcursor_xcursor.c.o.d -o
libwlroots-0.19.so.p/xcursor_xcursor.c.o -c ../xcursor/xcursor.c
| ../xcursor/xcursor.c: In function ‘xcursor_next_path’:
| ../xcursor/xcursor.c:605:23: error: initialization discards ‘const’ qualifier
from pointer target type [-Werror=discarded-qualifiers]
| 605 | char *colon = strchr(path, ':');
| | ^~~~~~
| cc1: all warnings being treated as errors
...
| ninja: build stopped: subcommand failed.
| dh_auto_build: error: cd obj-aarch64-linux-gnu && LC_ALL=C.UTF-8 ninja -j128
-v returned exit code 1
| make: *** [debian/rules:7: binary] Error 25
| dpkg-buildpackage: error: debian/rules binary subprocess failed with exit
status 2
|
--------------------------------------------------------------------------------
The full build log is available here [1].
The issue is due to ISO C23 declaration of bsearch, memchr, strchr,
strpbrk, strrchr, strstr, wcschr, wcspbrk, wcsrchr, wcsstr and wmemchr,
which now returns a pointer to a const-qualified type when the input
argument is a pointer to a const-qualified type [2].
I would like to thanks Emanuele Rocca for doing the archive rebuild on
a fast arm64 server.
Regards
Aurelien
[1]
https://people.debian.org/~ema/glibc-2.43-rebuilds/output-1/wlroots_arm64.build
[2]
https://sourceware.org/git/?p=glibc.git;a=blob;f=NEWS;h=e271fb2e4d76903c77a302aaec1ca22ce31027d0;hb=f762ccf84f122d1354f103a151cba8bde797d521#l19
--
Aurelien Jarno GPG: 4096R/1DDD8C9B
[email protected] http://aurel32.net
--- End Message ---
--- Begin Message ---
Version: 0.20.0~rc2-1
Hi Diederik,
On 2026-03-11 14:19, Diederik de Haas wrote:
> On Sun Feb 22, 2026 at 5:18 PM CET, Aurelien Jarno wrote:
> > Source: wlroots
> > Version: 0.19.2-1
> > Severity: important
> > Tags: ftbfs upstream
> > Justification: fails to build from source
> > User: [email protected]
> > Usertags: glibc-2.43
> >
> > Dear maintainer(s),
> >
> > wlroots fails to build from source with glibc 2.43, currently in
> > experimental. From the build log:
> >
> > | [371/398] cc -Ilibwlroots-0.19.so.p -I. -I.. -Iinclude -I../include
> > -Iprotocol -Irender/gles2/shaders -Irender/vulkan/shaders -Ibackend/drm
> > -I/usr/include/libdrm -I/usr/include/pixman-1 -fdiagnostics-color=always
> > -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -Werror -std=c23
> > -D_POSIX_C_SOURCE=200809L -DWLR_USE_UNSTABLE -DWLR_PRIVATE=
> > -DWLR_LITTLE_ENDIAN=1 -DWLR_BIG_ENDIAN=0 -Wundef -Wlogical-op
> > -Wmissing-include-dirs -Wold-style-definition -Wpointer-arith -Winit-self
> > -Wstrict-prototypes -Wimplicit-fallthrough=2 -Wendif-labels
> > -Wstrict-aliasing=2 -Woverflow -Wmissing-prototypes -Walloca
> > -Wno-missing-braces -Wno-missing-field-initializers -Wno-unused-parameter
> > -fmacro-prefix-map=../= -g -O2 -Werror=implicit-function-declaration
> > -ffile-prefix-map=/build/reproducible-path/wlroots-0.19.2=.
> > -fstack-protector-strong -fstack-clash-protection -Wformat
> > -Werror=format-security -mbranch-protection=standard -Wdate-time
> > -D_FORTIFY_SOURCE=2 -fPIC -pthread -MD -MQ
> > libwlroots-0.19.so.p/xcursor_xcursor.c.o -MF
> > libwlroots-0.19.so.p/xcursor_xcursor.c.o.d -o
> > libwlroots-0.19.so.p/xcursor_xcursor.c.o -c ../xcursor/xcursor.c
> > | FAILED: [code=1] libwlroots-0.19.so.p/xcursor_xcursor.c.o
> > | cc -Ilibwlroots-0.19.so.p -I. -I.. -Iinclude -I../include -Iprotocol
> > -Irender/gles2/shaders -Irender/vulkan/shaders -Ibackend/drm
> > -I/usr/include/libdrm -I/usr/include/pixman-1 -fdiagnostics-color=always
> > -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -Werror -std=c23
> > -D_POSIX_C_SOURCE=200809L -DWLR_USE_UNSTABLE -DWLR_PRIVATE=
> > -DWLR_LITTLE_ENDIAN=1 -DWLR_BIG_ENDIAN=0 -Wundef -Wlogical-op
> > -Wmissing-include-dirs -Wold-style-definition -Wpointer-arith -Winit-self
> > -Wstrict-prototypes -Wimplicit-fallthrough=2 -Wendif-labels
> > -Wstrict-aliasing=2 -Woverflow -Wmissing-prototypes -Walloca
> > -Wno-missing-braces -Wno-missing-field-initializers -Wno-unused-parameter
> > -fmacro-prefix-map=../= -g -O2 -Werror=implicit-function-declaration
> > -ffile-prefix-map=/build/reproducible-path/wlroots-0.19.2=.
> > -fstack-protector-strong -fstack-clash-protection -Wformat
> > -Werror=format-security -mbranch-protection=standard -Wdate-time
> > -D_FORTIFY_SOURCE=2 -fPIC -pthread -MD -MQ
> > libwlroots-0.19.so.p/xcursor_xcursor.c.o -MF
> > libwlroots-0.19.so.p/xcursor_xcursor.c.o.d -o
> > libwlroots-0.19.so.p/xcursor_xcursor.c.o -c ../xcursor/xcursor.c
> > | ../xcursor/xcursor.c: In function ‘xcursor_next_path’:
> > | ../xcursor/xcursor.c:605:23: error: initialization discards ‘const’
> > qualifier from pointer target type [-Werror=discarded-qualifiers]
> > | 605 | char *colon = strchr(path, ':');
> > | | ^~~~~~
> > | cc1: all warnings being treated as errors
>
> Can you verify if this is fixed with wlroots 0.20.0-rc1 (or later),
> available in experimental? I strongly suspect it is, due to
> 47486545b196 ("Add "const" to eliminate "error: initialization discards
> ‘const’ qualifier from pointer target type"")
>
> https://gitlab.freedesktop.org/wlroots/wlroots/-/commit/47486545b196
>
> And that commit is part of 0.20.0-rc1
Thanks for pointing me out to the version in experimental. The version
0.20.0~rc1-1 fails to build for another reason, so I can't check. But
I can confirm the issue is fixed in version 0.20.0~rc2-1.
I am therefore closing the bug with this version.
Regards
Aurelien
--
Aurelien Jarno GPG: 4096R/1DDD8C9B
[email protected] http://aurel32.net
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