Build gamescope in Fedora 40

_gamescope_build_fedora40.md

gamescope build on Fedora 40

These are my notes on how to build gamescope in Fedora 40

Install dependencies

sudo dnf install SDL2-devel cmake gcc gcc-c++ git glm-devel glslang google-benchmark-devel hwdata-devel libX11-devel libXcomposite-devel libXcursor-devel libXdamage-devel libXext-devel libXfixes-devel libXmu-devel libXrender-devel libXres-devel libXtst-devel libXxf86vm-devel libcap-devel libdisplay-info-devel libdrm-devel libliftoff-devel libxkbcommon-devel meson ninja-build pipewire-devel stb_image-devel stb_image_resize-devel stb_image_write-devel vkroots-devel vulkan-loader-devel wayland-devel wayland-protocols-devel wlroots-devel xorg-x11-server-Xwayland-devel libavif-devel libseat-devel

Clone gamescope

git clone https://github.com/ValveSoftware/gamescope.git
cd gamescope/
git submodule update --init --recursive

Fix subprojects compatibility with gcc14

Apply libliftoff gcc14 patch

(cd subprojects/libliftoff/ && curl https://gist.githubusercontent.com/perroboc/e090a556d262c9775f88295bd4f6b361/raw/b9c56b6afb302243b507801a3c0c94187a3cafcd/libliftoff-gcc14-fedora40.patch | git apply -v --index)

Apply wlroots gcc14 patch

(cd subprojects/wlroots/ && curl https://gist.githubusercontent.com/perroboc/e090a556d262c9775f88295bd4f6b361/raw/b9c56b6afb302243b507801a3c0c94187a3cafcd/wlroots-gcc14-fedora40.patch | git apply -v --index)

Setup build and compile

meson setup -Dpipewire=enabled --reconfigure build/
meson install -C build/ --skip-subprojects

libliftoff-gcc14-fedora40.patch

From 29a06add8ef184f85e37ff8abdc34fbaa2f4ee1e Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <[email protected]>
Date: Thu, 21 Dec 2023 20:15:29 +0000
Subject: [PATCH] layer.c: fix build against upcoming `gcc-14`
 (`-Werror=calloc-transposed-args`)

`gcc-14` added a new `-Wcalloc-transposed-args` warning recently. It
detected minor infelicity in `calloc()` API usage in `libliftoff`:

    ../layer.c: In function 'liftoff_layer_create':
    ../layer.c:20:48: error: 'calloc' sizes specified with 'sizeof' in the earlier argument and not in t
    ument [-Werror=calloc-transposed-args]
       20 |         layer->candidate_planes = calloc(sizeof(layer->candidate_planes[0]),
          |                                                ^
    ../layer.c:20:48: note: earlier argument should specify number of elements, later size of each element
---
 layer.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/layer.c b/layer.c
index 73a8186..6510ea7 100644
--- a/layer.c
+++ b/layer.c
@@ -17,8 +17,8 @@ liftoff_layer_create(struct liftoff_output *output)
 		return NULL;
 	}
 	layer->output = output;
-	layer->candidate_planes = calloc(sizeof(layer->candidate_planes[0]),
-					 output->device->planes_cap);
+	layer->candidate_planes = calloc(output->device->planes_cap,
+					 sizeof(layer->candidate_planes[0]));
 	if (layer->candidate_planes == NULL) {
 		liftoff_log_errno(LIFTOFF_ERROR, "calloc");
 		free(layer);
-- 
GitLab

wlroots-gcc14-fedora40.patch

diff --git a/backend/libinput/tablet_pad.c b/backend/libinput/tablet_pad.c
index 2e74022a..e5327528 100644
--- a/backend/libinput/tablet_pad.c
+++ b/backend/libinput/tablet_pad.c
@@ -33,7 +33,7 @@ static void add_pad_group_from_libinput(struct wlr_tablet_pad *pad,
 			++group->ring_count;
 		}
 	}
-	group->rings = calloc(sizeof(unsigned int), group->ring_count);
+	group->rings = calloc(group->ring_count, sizeof(unsigned int));
 	if (group->rings == NULL) {
 		goto group_fail;
 	}
@@ -50,7 +50,7 @@ static void add_pad_group_from_libinput(struct wlr_tablet_pad *pad,
 			++group->strip_count;
 		}
 	}
-	group->strips = calloc(sizeof(unsigned int), group->strip_count);
+	group->strips = calloc(group->strip_count, sizeof(unsigned int));
 	if (group->strips == NULL) {
 		goto group_fail;
 	}
@@ -66,7 +66,7 @@ static void add_pad_group_from_libinput(struct wlr_tablet_pad *pad,
 			++group->button_count;
 		}
 	}
-	group->buttons = calloc(sizeof(unsigned int), group->button_count);
+	group->buttons = calloc(group->button_count, sizeof(unsigned int));
 	if (group->buttons == NULL) {
 		goto group_fail;
 	}

fixed it for me, thanks!!