build(linux): generate glad sources at compile time (#4798)

Co-authored-by: Conn O'Griofa <connogriofa@gmail.com>

packaging/linux/Arch/PKGBUILD

@@ -63,6 +63,8 @@ makedepends=(
   'make'
   'nodejs'
   'npm'
+  'python-jinja'  # required by the glad OpenGL/EGL loader generator
+  'python-setuptools'  # required for glad OpenGL/EGL loader generated, v2.0.0
 )
 
 checkdepends=(

packaging/linux/copr/Sunshine.spec

@@ -67,6 +67,8 @@ BuildRequires: nodejs-npm
 BuildRequires: numactl-devel
 BuildRequires: opus-devel
 BuildRequires: pulseaudio-libs-devel
+BuildRequires: python3-jinja2
+BuildRequires: python3-setuptools
 BuildRequires: systemd-udev
 %{?sysusers_requires_compat}
 # for unit tests
@@ -86,6 +88,9 @@ BuildRequires: libnuma-devel
 BuildRequires: libopus-devel
 BuildRequires: libpulse-devel
 BuildRequires: npm
+BuildRequires: python311
+BuildRequires: python311-Jinja2
+BuildRequires: python311-setuptools
 BuildRequires: udev
 # for unit tests
 BuildRequires: xvfb-run
@@ -117,9 +122,9 @@ BuildRequires: gcc15-c++
 %if 0%{?suse_version}
 %if 0%{?suse_version} <= 1699
 # OpenSUSE Leap 15.x
-BuildRequires: gcc13
-BuildRequires: gcc13-c++
-%global gcc_version 13
+BuildRequires: gcc14
+BuildRequires: gcc14-c++
+%global gcc_version 14
 %global cuda_version 12.9.1
 %global cuda_build 575.57.08
 %else

packaging/linux/flatpak/dev.lizardbyte.app.Sunshine.yml

@@ -50,6 +50,11 @@ modules:
   # FFmpeg prebuilt binaries
   - "modules/ffmpeg.json"
 
+  # Python PyPI build-time dependencies (e.g. jinja2 for glad generator).
+  # glad-dependencies.json is generated at CI time by flatpak-pip-generator and
+  # placed alongside the manifest in the build directory.
+  - "glad-dependencies.json"
+
   - name: sunshine
     builddir: true
     build-options:
@@ -71,6 +76,7 @@ modules:
       - -DCMAKE_BUILD_TYPE=Release
       - -DCMAKE_CUDA_COMPILER=/app/cuda/bin/nvcc
       - -DFFMPEG_PREPARED_BINARIES=/app/ffmpeg
+      - -DGLAD_SKIP_PIP_INSTALL=ON
       - -DSUNSHINE_ASSETS_DIR=share/sunshine
       - -DSUNSHINE_BUILD_FLATPAK=ON
       - -DSUNSHINE_EXECUTABLE_PATH=/app/bin/sunshine