mirror of
https://github.com/Cesarus85/ringfall-mjolnir-vr.git
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Paul Hontz
041211229a
The Linux release did not start on a Steam Deck: it was linked against the
build machine's glibc (Arch's, so it asked for GLIBC_2.43; SteamOS 3.8 has
2.41) and needed a 32-bit SDL3, which SteamOS, whose system is read-only,
and most distributions do not have.
The portable build (configure.py --portable, which tools/ci_build.py and so
every GitHub Actions build uses) is now compiled and linked against the
32-bit glibc 2.31 of Debian 11, the Steam Runtime 3 ("sniper") baseline,
and brings its own SDL 3.4.16, libSDL3.so.0 beside the executable, which
finds it there first: a DT_RPATH of $ORIGIN (--disable-new-dtags), which
comes before LD_LIBRARY_PATH, as Steam sets one for the games it starts.
tools/linux_sysroot.py downloads the Debian packages and SDL's source
release into build/linux/third_party, from a ninja edge, so only a Linux
build fetches them. Each package comes from archive.debian.org, else
deb.debian.org, else snapshot.debian.org (a permanent URL, at a time when
the package was in the archive); SDL from its GitHub release, else
libsdl.org. Each URL is tried three times, a moment apart, and each file
checked against its SHA-256. tools/linux_sysroot.cmake builds SDL against
the same system root, with X11, Wayland, libdecor (Debian 12's, for
GNOME's window decorations), PipeWire, PulseAudio, ALSA, udev and D-Bus
loaded when it starts, and the build stops if SDL lacks one of them or
would link to libdecor. A build without --portable is as before. The
workflow installs CMake, pkgconf and wayland-scanner instead of lib32-sdl3,
and caches the downloads; the release zip gains libSDL3.so.0 and its
license (SDL3-LICENSE.txt), and the self-updater deletes their .old copies.
With --pgo=train, the instrumented build's copy of libSDL3.so.0 is made
before it plays.
The release build needs GLIBC_2.29 at most (halo and libSDL3.so.0, by
readelf -V), and links only to libSDL3.so.0, libm, libpthread, libdl,
libgcc_s and libc; libSDL3.so.0 only to libm, libdl, libpthread and libc
(libdecor-0.so.0 is a name it loads, not a dependency). It should start on
Debian 11, Ubuntu 20.04, Fedora 32 and later, untested: there, the 32-bit
Wayland libraries are older than the 1.20 that SDL's Wayland driver needs,
so SDL uses X11 (XWayland in a Wayland session). On a Steam Deck (SteamOS
3.8.16, Game Mode, started as Steam starts a non-Steam game), the upstream
release stops at load time (libSDL3.so.0 not found; GLIBC_2.43 not found);
this one loads b30 on the GPU (radeonsi, OpenGL 4.6) and exits with status
0 at debug.exit_after, with its own libSDL3.so.0 though LD_LIBRARY_PATH
names a folder holding another. Debug and release builds from an empty
build folder (every download), and tools/test_linux_port.py,
tools/harness and tools/test_light_storage.py, pass in an Arch container
with the workflow's packages.
19 lines
961 B
CMake
19 lines
961 B
CMake
# CMake toolchain of the portable Linux build's SDL3 (tools/linux_build.py):
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# clang for 32-bit x86, against the system root of tools/linux_sysroot.py,
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# given as -DHALO_SYSROOT=<folder>. The libraries SDL finds there it loads
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# when it starts (dlopen), by the names it reads from them.
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set(CMAKE_SYSTEM_NAME Linux)
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set(CMAKE_SYSTEM_PROCESSOR i686)
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set(CMAKE_C_COMPILER_TARGET i686-linux-gnu)
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set(CMAKE_SYSROOT "${HALO_SYSROOT}")
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set(CMAKE_LIBRARY_ARCHITECTURE i386-linux-gnu)
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set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
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set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
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set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
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set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
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set(ENV{PKG_CONFIG_SYSROOT_DIR} "${HALO_SYSROOT}")
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set(ENV{PKG_CONFIG_LIBDIR} "${HALO_SYSROOT}/usr/lib/i386-linux-gnu/pkgconfig:${HALO_SYSROOT}/usr/share/pkgconfig")
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set(ENV{PKG_CONFIG_PATH} "")
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# (and in the projects CMake tries compiling in)
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list(APPEND CMAKE_TRY_COMPILE_PLATFORM_VARIABLES HALO_SYSROOT)
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