Arch Linux User Repository

labwc now depends on libsfdo, which is also an AUR package at this time.

Yeah, labwc is currently not handling it gracefully if there is no font.
https://github.com/labwc/labwc/issues/1526
It is not really depending on a font, but also doesn't check if there is any. So therefore I refrained up until now to add a general ttf-font dep. But maybe it is the best to avoid accidental breakage.

I believe that ttf-font is a dependency. (I assume labwc also)

I uninstalled orphan packages which removed gnu-free-fonts and then labwc would segfault. Reinstalling gnu-free-fonts resolved it.

In the git history of this PKGBUILD is a commit which makes it possible to compile labwc without any wlroots package. You just need to change the locally cloned repo to this revision.
Not a general solution, as it adds wlroots specific files to the package. (To be formally right the changes should also include conflicting with wlroots). But everyone that has wlroots installed only because of labwc can use this temporary solution.

Yeah. ~Nothing can be done~. This will resolve either due to 0.16.x hitting the repos or upstream updating the source in regards to changes from the wlroots 0.17 dev-cyclus.
Or updating either wlroots or wlroots-git and build a compatible version. But that depends on the respective local setups.

Edit: Yeah, scratch that. I totally forgot about building labwc with statically linked wlroots... >.>
So there are three possible solutions.
1. Wait for wlroots in the repos (currently in staging)
2. Build with a modified wlroots-git PKGBUILD a working wlroots
3. Adjust labwc-git PKGBUILD to build it with wlroots included. Needs the following: --force-fallback-for=wlroots

This package is now broken because wlroots-git is at 0.17.

Build fails for me:

[4/232] Compiling C object subprojects/wlroots/libwlroots.a.p/render_vulkan_renderer.c.o
FAILED: subprojects/wlroots/libwlroots.a.p/render_vulkan_renderer.c.o 
cc -Isubprojects/wlroots/libwlroots.a.p -Isubprojects/wlroots -I../labwc/subprojects/wlroots -Isubprojects/wlroots/include -I../labwc/subprojects/wlroots/include -Isubprojects/wlroots/protocol -I../labwc/subprojects/wlroots/protocol -Isubprojects/wlroots/render/vulkan/shaders -I/usr/include/libdrm -I/usr/include/pixman-1 -flto=auto -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -Werror -std=c11 -O0 -DWLR_USE_UNSTABLE -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=../labwc/subprojects/wlroots/= -DHAS_GBM_BO_GET_FD_FOR_PLANE=1 -DLIBINPUT_HAS_HOLD_GESTURES=1 -DLIBINPUT_HAS_SCROLL_VALUE120=1 '-DICONDIR="/usr/local/share/icons"' -DHAS_XCB_XFIXES_SET_CLIENT_DISCONNECT_MODE=1 -DHAS_XCB_ERRORS=1 -DHAS_EGL=1 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fexceptions -Wp,-D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security -fstack-clash-protection -fcf-protection -fPIC -MD -MQ subprojects/wlroots/libwlroots.a.p/render_vulkan_renderer.c.o -MF subprojects/wlroots/libwlroots.a.p/render_vulkan_renderer.c.o.d -o subprojects/wlroots/libwlroots.a.p/render_vulkan_renderer.c.o -c ../labwc/subprojects/wlroots/render/vulkan/renderer.c
../labwc/subprojects/wlroots/render/vulkan/renderer.c: In function 'vulkan_read_pixels':
../labwc/subprojects/wlroots/render/vulkan/renderer.c:1152:78: error: dereferencing type-punned pointer might break strict-aliasing rules [-Werror=strict-aliasing]
 1152 |         res = vkMapMemory(dev, dst_img_memory, 0, VK_WHOLE_SIZE, 0, (void **)&d);
      |                                                                              ^~
cc1: all warnings being treated as errors

This is broken until wlroots 0.15.0 hits the repos.
See https://aur.archlinux.org/packages/labwc-git/#comment-844664 for some more information.
If you don't need wlroots-git for anything else, you could change the PKGBUILD to build from tag 0.15.x

@TrialnError I'm no longer able to build this, seems like it requires wlroots 0.15.0, but wlroots-git is currently on 0.16.0.

This is from a fresh Arch install inside a VM (using the archinstall script):

Program git found: YES (/usr/bin/git)
Automatic wrap-based subproject downloading is disabled
Subproject wlroots is buildable: NO (disabling)
Found pkg-config: /usr-bin-pkg-config (1.9.0)
Dependency wlroots found: NO found 0.16.0 but need: ’=0.15.0’
Found CMake: /usr/bin/cmake (3.22.1)
Run-time dependency wlroots found: NO (tried pkgconfig and cmake)
Looking for a fallback subproject for the dependency wlroots

meson.build:53:2: ERROR: Subproject "subprojects/wlroots" required but not found.
A full log can be found at [...]
==> ERROR: A failure occurred in build().
    Aborting...
-> error making: labwc-git

@TrialnError --

No problem! Thank you :) I can see where not having to follow wlroots-git would be A Good Thing(TM)

Clemmitt