build.sh

#!/usr/bin/env bash
set -euo pipefail
cd -- "$(dirname -- "$0")"
mkdir -p out
if [[ -z ${CC:-} ]]; then
    CC=$(command -v cc || command -v gcc || true)
    if [[ -z $CC ]]; then
        for candidate in /nix/store/*-gcc-wrapper-*/bin/gcc; do
            if [[ -x $candidate ]]; then CC=$candidate; break; fi
        done
    fi
fi
if [[ -z ${CC:-} ]]; then echo 'Install GCC/Clang or set CC.' >&2; exit 1; fi
# Dependencies come from pkg-config (Vulkan loader/headers, SDL3). On NixOS the
# environment is provided by shell.nix; re-enter it automatically if needed.
if ! { command -v pkg-config >/dev/null && pkg-config --exists vulkan sdl3 && command -v cmake >/dev/null && command -v ninja >/dev/null; }; then
    if [[ -z ${BB_IN_NIX_SHELL:-} ]] && command -v nix-shell >/dev/null; then
        exec env BB_IN_NIX_SHELL=1 nix-shell shell.nix --run "bash build.sh $*"
    fi
    echo 'Need pkg-config with vulkan and sdl3, cmake and ninja (see shell.nix).' >&2; exit 1
fi
read -r -a includes <<< "$(pkg-config --cflags vulkan sdl3)"
read -r -a libraries <<< "$(pkg-config --libs vulkan sdl3)"
# GPU library (shadPS4 video core + drivers), built by CMake into out/gpu/libbbgpu.so.
# BB_PGO: generate (instrumented build that writes pgo/ while the game runs), use, off.
# Default: use the profile in pgo/ when there is one. BB_LTO=OFF disables link-time optimization.
pgo=${BB_PGO:-}
if [[ -z $pgo ]]; then
    if [[ -n $(find pgo -name '*.gcda' -print -quit 2>/dev/null) ]]; then pgo=use; else pgo=off; fi
fi
# A profile only applies when its files are named as this build names them (relative to out/gpu,
# -fprofile-prefix-path): one recorded elsewhere matched nothing and PGO was silently off.
if [[ $pgo == use && -z $(find pgo -name 'CMakeFiles#bbgpu.dir#*.gcda' -print -quit 2>/dev/null) ]]; then
    echo 'PGO: the profile in pgo/ is from another build layout (rebuild it: BB_PGO=generate); built without it' >&2
    pgo=off
fi
mkdir -p pgo
# Submodules (git clone --recursive, or: git submodule update --init) and this port's changes
# to FSR-Vulkan (gpu/patches/fsr-vulkan), applied to its working tree once.
if [[ ! -f gpu/third_party/fsr-vulkan/CMakeLists.txt || ! -f gpu/third_party/imgui/imgui.h ]]; then
    git submodule update --init --recursive
fi
# Issue #124: a checkout updated from an earlier version keeps that version's patch applied, and
# the new one applies neither way ("patch does not apply"): the submodule's tree holds nothing but
# these patches, so it is reset and they are applied again.
fsr_patches_apply() {
    for patch in gpu/patches/fsr-vulkan/*.patch; do
        if ! git -C gpu/third_party/fsr-vulkan apply --reverse --check "$PWD/$patch" 2>/dev/null; then
            git -C gpu/third_party/fsr-vulkan apply "$@" "$PWD/$patch" || return 1
        fi
    done
}
if ! fsr_patches_apply --check 2>/dev/null; then
    echo 'FSR-Vulkan: an earlier version of the port changed it; resetting it and patching again'
    git -C gpu/third_party/fsr-vulkan checkout -- .
fi
fsr_patches_apply
cmake -S gpu -B out/gpu -G Ninja -DCMAKE_BUILD_TYPE=RelWithDebInfo -DBB_PGO="$pgo" \
    -DBB_LTO="${BB_LTO:-ON}" -DBB_PGO_DIR="$PWD/pgo" > out/gpu-cmake.log
grep '^-- Online module' out/gpu-cmake.log || true
echo "GPU library: PGO $pgo, LTO ${BB_LTO:-ON}"
# A failed GPU build must stop here: an older libbbgpu.so would otherwise be used silently.
if ! ninja -C out/gpu bbgpu $(grep -q "^build bbnet20:" out/gpu/build.ninja && echo bbnet20) > out/gpu-build.log 2>&1; then
    grep -v '^\[' out/gpu-build.log | tail -40 >&2
    echo 'GPU library build failed (full log: out/gpu-build.log)' >&2; exit 1
fi
# Optional DLSS (NVIDIA RTX): DLSS_SDK_ROOT=<github.com/NVIDIA/DLSS checkout> builds the bridge
# (gpu/dlss_bridge, the only code using NVIDIA's SDK) and puts it next to bb-probe with NVIDIA's
# libnvidia-ngx-dlss.so (Super Resolution) and libnvidia-ngx-dlssg.so (Frame Generation, GeForce
# RTX 40 and newer; SDK 310.7 or newer has it). Without them the DLSS upscaler and DLSS Frame
# Generation are listed as unavailable.
if [[ -n ${DLSS_SDK_ROOT:-} ]]; then
    cmake -S gpu/dlss_bridge -B out/dlss-bridge -G Ninja -DCMAKE_BUILD_TYPE=Release \
        -DDLSS_SDK_ROOT="$DLSS_SDK_ROOT" >/dev/null
    ninja -C out/dlss-bridge >/dev/null
    rm -f out/libnvidia-ngx-dlss.so.* out/libnvidia-ngx-dlssg.so.*
    cp out/dlss-bridge/libbbport_dlss.so "$DLSS_SDK_ROOT"/lib/Linux_x86_64/rel/libnvidia-ngx-dlss.so.* out/
    if ls "$DLSS_SDK_ROOT"/lib/Linux_x86_64/rel/libnvidia-ngx-dlssg.so.* >/dev/null 2>&1; then
        cp "$DLSS_SDK_ROOT"/lib/Linux_x86_64/rel/libnvidia-ngx-dlssg.so.* out/
        echo "DLSS Frame Generation library: $(ls out/libnvidia-ngx-dlssg.so.*)"
    else
        echo "DLSS Frame Generation library not in this SDK (lib/Linux_x86_64/rel/libnvidia-ngx-dlssg.so.*): DLSS Super Resolution only"
    fi
    cp "$DLSS_SDK_ROOT/LICENSE.txt" out/NVIDIA-DLSS-LICENSE.txt
    echo "DLSS bridge: out/libbbport_dlss.so"
fi
# $ORIGIN/gpu: packaged copies keep the library next to the binary without patching it.
gpu=(-Lout/gpu -lbbgpu -Wl,-rpath,'$ORIGIN/gpu' -Wl,-rpath,"$PWD/out/gpu" -rdynamic)
runtime=(src/runtime*.c)
# Third-party decoders: compiled once, without this project's -Werror policy.
atrac9=(third_party/LibAtrac9/C/src/*.c)
if [[ ! -f out/libatrac9.a || -n $(find third_party/LibAtrac9/C/src -newer out/libatrac9.a -name '*.c') ]]; then
    rm -rf out/atrac9 && mkdir -p out/atrac9
    for source in "${atrac9[@]}"; do "$CC" -std=c99 -O2 -g -w -c "$source" -o "out/atrac9/$(basename "${source%.c}").o"; done
    ar rcs out/libatrac9.a out/atrac9/*.o
fi
"$CC" -std=c11 -O2 -g -Wall -Wextra -Werror -pthread -no-pie "${includes[@]}" -I. -Isrc src/probe.c "${runtime[@]}" src/vulkan_smoke.c out/libatrac9.a -lm "${gpu[@]}" "${libraries[@]}" -o out/bb-probe
echo "Built $PWD/out/bb-probe"
# GPU check for run.sh (live_resolution=auto) and the launcher's gamepad list (--gamepads).
"$CC" -std=c11 -O2 -Wall -Wextra -Werror "${includes[@]}" tools/gpu_capabilities.c "${libraries[@]}" -o out/bb-gpu-capabilities
if [[ ${1:-} == --test ]]; then
    "$CC" -std=c11 -O2 -g -Wall -Wextra -Werror -pthread "${includes[@]}" -I. -Isrc tests/test_pad.c "${libraries[@]}" -lm -o out/pad-test
    out/pad-test
    "$CC" -std=c11 -O2 -g -Wall -Wextra -Werror -pthread -I. -Isrc tests/test_runtime.c "${runtime[@]}" out/libatrac9.a -lm "${gpu[@]}" "${libraries[@]}" -o out/runtime-test
    out/runtime-test
    "$CC" -std=c11 -O2 -g -Wall -Wextra -Werror -pthread -Isrc tests/test_file_mods.c src/runtime_remote.c -o out/file-mods-test
    out/file-mods-test
    "$CC" -std=c11 -O2 -g -Wall -Wextra -Werror -pthread -I. -Isrc tests/test_sema.c "${runtime[@]}" out/libatrac9.a -lm "${gpu[@]}" "${libraries[@]}" -o out/sema-test
    out/sema-test
    "$CC" -std=c11 -O2 -g -Wall -Wextra -Werror -pthread -I. -Isrc tests/test_online.c "${runtime[@]}" out/libatrac9.a -lm "${gpu[@]}" "${libraries[@]}" -o out/online-test
    out/online-test
    "$CC" -std=c11 -D_GNU_SOURCE -O2 -g -Wall -Wextra -Werror -I. -Isrc tests/test_content.c src/runtime_content.c -o out/content-test
    out/content-test
    "$CC" -std=c11 -O2 -g -Wall -Wextra -Werror -pthread -Isrc tests/test_trophy.c src/runtime_trophy.c -o out/trophy-test
    out/trophy-test out/trophy_test_tmp
fi