diff --git a/.circleci/config.yml b/.circleci/config.yml
index 3faca372cd6fb0f92d05fdea87de12a297705395..b3b97363eeb3f31e41ddf01f01e6f01f52c86204 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,9 +1,9 @@
 version: 2
 jobs:
   build:
-    working_directory: /root/SRB2
+    working_directory: /home/circleci/SRB2
     docker:
-      - image: debian:stretch
+      - image: cimg/base:current
         environment:
           CC: ccache gcc -m32
           PKG_CONFIG_LIBDIR: /usr/lib/i386-linux-gnu/pkgconfig
@@ -11,7 +11,7 @@ jobs:
           LIBGME_LDFLAGS: -lgme
           CCACHE_COMPRESS: true
           WFLAGS: -Wno-unsuffixed-float-constants
-          GCC49: true
+          GCC81: true
       #- image: ubuntu:trusty
       #  environment:
       #    CC: ccache gcc -m32
@@ -25,39 +25,42 @@ jobs:
     steps:
       - run:
           name: Add i386 arch
-          command: dpkg --add-architecture i386
+          command: sudo dpkg --add-architecture i386
       - run:
           name: Add STJr PPA
           command: |
-            apt-get -qq update
-            apt-get -qq -y install dirmngr
-            apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 0B1702D71499D9C25F986507F240F4449D3B0EC6
-            echo "deb http://ppa.launchpad.net/stjr/srb2/ubuntu trusty main" >> /etc/apt/sources.list
+            sudo apt-get -qq update
+            sudo apt-get -qq -y install dirmngr
+            sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 0B1702D71499D9C25F986507F240F4449D3B0EC6
+            echo "deb http://ppa.launchpad.net/stjr/srb2/ubuntu trusty main" | sudo tee -a /etc/apt/sources.list
       - run:
           name: Make APT cache folder
-          command: mkdir -p /root/.cache/apt/archives/partial
+          command: mkdir -p /home/circleci/.cache/apt/archives/partial
       - run:
           name: Make APT cache usage by _apt
-          command: chown -Rv _apt:root /root/.cache/apt/archives/partial
+          command: sudo chown -Rv _apt:root /home/circleci/.cache/apt/archives/partial
       - run:
           name: Update APT listing
-          command: apt-get -qq update
+          command: sudo apt-get -qq update
       - run:
           name: Support S3 upload
-          command: apt-get -qq -y install ca-certificates
+          command: sudo apt-get -qq -y install ca-certificates
       - restore_cache:
           keys:
             - v1-SRB2-APT
       - run:
-          name: Install SDK
-          command: apt-get -o Dir::Cache="/root/.cache/apt" -qq -y --no-install-recommends install git build-essential libpng-dev:i386 libsdl2-mixer-dev:i386 libgme-dev:i386 libcurl4-openssl-dev:i386 libopenmpt-dev:i386 gettext ccache wget gcc-multilib upx openssh-client
+         name: Uninstall amd64 SDK
+         command: sudo apt-get -o Dir::Cache="/home/circleci/.cache/apt" -qq -y --no-install-recommends remove libcurl4-openssl-dev:amd64
+      - run:
+          name: Install i386 SDK
+          command: sudo apt-get -o Dir::Cache="/home/circleci/.cache/apt" -qq -y --no-install-recommends install git build-essential libpng-dev:i386 libsdl2-mixer-dev:i386 libgme-dev:i386 libcurl4-openssl-dev:i386 libopenmpt-dev:i386 gettext ccache wget gcc-multilib upx openssh-client
       - run:
           name: make md5sum
-          command: find /root/.cache/apt/archives -type f -print0 | sort -z | xargs -r0 md5sum > /root/.cache/apt_archives.md5
+          command: sudo find /home/circleci/.cache/apt/archives -type f -print0 | sort -z | sudo xargs -r0 md5sum > /home/circleci/.cache/apt_archives.md5
       - save_cache:
-          key: v1-SRB2-APT-{{ checksum "/root/.cache/apt_archives.md5" }}
+          key: v1-SRB2-APT-{{ checksum "/home/circleci/.cache/apt_archives.md5" }}
           paths:
-            - /root/.cache/apt
+            - /home/circleci/.cache/apt
       - checkout
       - run:
           name: Compile without network support
@@ -78,9 +81,9 @@ jobs:
           name: Compile
           command: make -C src LINUX=1 ERRORMODE=1 -k -j4
       - store_artifacts:
-          path: /root/SRB2/bin/
+          path: /home/circleci/SRB2/bin/
           destination: bin
       - save_cache:
           key: v1-SRB2-{{ .Branch }}-{{ checksum "make/linux/SDL.deps" }}
           paths:
-            - /root/.ccache
+            - /home/circleci/.ccache
diff --git a/.gitattributes b/.gitattributes
index 7751149ac07713a953529c5e8ba579109d76356d..c2e507352e6419be54e8866cc5bb40f5570a0fc7 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,15 +1,17 @@
 #Source code
+/Makefile text=auto
 /src/*.c text=auto
 /src/*.h text=auto
 /src/*.s text=auto
 /src/*.m text=auto
 /src/*.xpm text=auto
 /src/Makefile text=auto
+/tools/Makefile text=auto
 /src/Make*.cfg text=auto
 /src/CMakeLists.txt text=auto
+*.mk -whitespace text=auto
 # Windows EOL
 *.cs -crlf -whitespace
-*.mk -crlf -whitespace
 *.bat -crlf -whitespace
 *.dev -crlf -whitespace
 *.dsp -crlf -whitespace
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000000000000000000000000000000000000..b292bfc06c21f5ef02d6bb155ae4ab5e4ee6533c
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,434 @@
+variables:
+  GIT_STRATEGY: clone
+  GIT_CLONE_PATH: $CI_BUILDS_DIR/$CI_CONCURRENT_ID/$CI_PROJECT_PATH
+
+default:
+  image: debian:stable-slim
+
+  cache:
+    - key: ccache-$CI_PROJECT_PATH_SLUG-$CI_JOB_NAME_SLUG
+      fallback_keys:
+        - cache-$CI_PROJECT_PATH_SLUG-$CI_DEFAULT_BRANCH
+        - cache-$CI_PROJECT_PATH_SLUG-default
+      paths:
+        - ccache
+        - ccache_statslog
+
+    - key: apt-$CI_JOB_IMAGE
+      paths:
+        - apt-cache
+      unprotect: true
+
+  before_script:
+    - - |
+         # debconf
+         echo -e "\e[0Ksection_start:`date +%s`:debconf[collapsed=true]\r\e[0KSetup debconf's environment"
+      - export DEBIAN_FRONTEND="noninteractive"
+      - export DEBIAN_PRIORITY="low"
+      - export DEBCONF_NONINTERACTIVE_SEEN="true"
+      - |
+          # debconf
+          echo -e "\e[0Ksection_end:`date +%s`:debconf\r\e[0K"
+    - - |
+          # dpkg_aa
+          echo -e "\e[0Ksection_start:`date +%s`:dpkg_aa[collapsed=true]\r\e[0KAdding architectures to dpkg"
+      - dpkg --add-architecture i386
+      - dpkg --add-architecture amd64
+      - dpkg --add-architecture arm64
+      - |
+          # dpkg_aa
+          echo -e "\e[0Ksection_end:`date +%s`:dpkg_aa\r\e[0K"
+    - - |
+          # apt_conf
+          echo -e "\e[0Ksection_start:`date +%s`:apt_conf[collapsed=true]\r\e[0KSetting up APT conf"
+      - export APT_CACHE_DIR=`pwd`/apt-cache
+      - mkdir --parents --verbose $APT_CACHE_DIR/partial/
+      - touch /etc/apt/apt.conf.d/99build
+      - |
+          # apt.conf
+          echo Adding options to apt.conf':'
+      - |
+          # APT::Install-Recommends
+          echo APT::Install-Recommends "false"\;       | tee --append /etc/apt/apt.conf.d/99build
+      - |
+          # quit
+          echo quiet "1"\;                             | tee --append /etc/apt/apt.conf.d/99build
+      - |
+          # APT::Get::Assume-Yes
+          echo APT::Get::Assume-Yes "true"\;           | tee --append /etc/apt/apt.conf.d/99build
+      - |
+          # Dir::Cache::Archives
+          echo Dir::Cache::Archives "$APT_CACHE_DIR"\; | tee --append /etc/apt/apt.conf.d/99build
+      - |
+          # apt_conf
+          echo -e "\e[0Ksection_end:`date +%s`:apt_conf\r\e[0K"
+    - - |
+          # apt_update
+          echo -e "\e[0Ksection_start:`date +%s`:apt_update[collapsed=true]\r\e[0KUpdating APT listing"
+      - apt-get update
+      - |
+          # apt_update
+          echo -e "\e[0Ksection_end:`date +%s`:apt_update\r\e[0K"
+
+    - - |
+          # apt_pre
+          echo -e "\e[0Ksection_start:`date +%s`:apt_pre[collapsed=true]\r\e[0KInstalling pre packages"
+      - apt-get install apt-utils
+      - |
+          # apt_pre
+          echo -e "\e[0Ksection_end:`date +%s`:apt_pre\r\e[0K"
+
+    - - |
+          # apt_upgrade
+          echo -e "\e[0Ksection_start:`date +%s`:apt_upgrade[collapsed=true]\r\e[0KUpdating existing packages"
+      - apt-get upgrade
+      - |
+          # apt_update
+          echo -e "\e[0Ksection_end:`date +%s`:apt_upgrade\r\e[0K"
+
+    - - |
+          # apt_common
+          echo -e "\e[0Ksection_start:`date +%s`:apt_common[collapsed=true]\r\e[0KInstalling common packages"
+      - apt-get install make git ccache nasm
+      - |
+          # apt_common
+          echo -e "\e[0Ksection_end:`date +%s`:apt_common\r\e[0K"
+
+    - - |
+          # ccache_config
+          echo -e "\e[0Ksection_start:`date +%s`:ccache_config[collapsed=true]\r\e[0KSetting up ccache config"
+      - mkdir --parents --verbose ~/.ccache/
+      - touch ~/.ccache/ccache.conf
+      - |
+          # cache.conf
+          echo Adding ccache configution option
+      - |
+          # base_dir
+          echo base_dir = $PWD                  | tee --append ~/.ccache/ccache.conf
+      - |
+          # cache_dir
+          echo cache_dir = $PWD/ccache          | tee --append ~/.ccache/ccache.conf
+      - |
+          # compiler_check
+          echo compiler_check = content         | tee --append ~/.ccache/ccache.conf
+      - |
+          # stats_log
+          echo stats_log = $PWD/ccache_statslog | tee --append ~/.ccache/ccache.conf
+      - |
+          # max_size
+          echo max_size = 50M                   | tee --append ~/.ccache/ccache.conf
+      - |
+          # ccache_config
+          echo -e "\e[0Ksection_end:`date +%s`:ccache_config\r\e[0K"
+
+    - - |
+          # cache_reset
+          echo -e "\e[0Ksection_start:`date +%s`:ccache_reset[collapsed=true]\r\e[0KResetting ccache statistics"
+      - ccache --zero-stats
+      - ccache --show-stats
+      - |
+          # ccache_reset
+          echo -e "\e[0Ksection_end:`date +%s`:ccache_reset\r\e[0K"
+
+  artifacts:
+    paths:
+      - "bin/"
+      - "src/comptime.h"
+    name: "$CI_PROJECT_PATH_SLUG-$CI_COMMIT_REF_SLUG-$CI_COMMIT_SHORT_SHA-$CI_JOB_NAME_SLUG"
+
+  after_script:
+    - - |
+           # apt_clean
+           echo -e "\e[0Ksection_start:`date +%s`:apt_clean[collapsed=true]\r\e[0KCleaning of unneeded APT packages"
+      - apt-get autoclean
+      - |
+          # apt_clean
+          echo -e "\e[0Ksection_end:`date +%s`:apt_clean\r\e[0K"
+
+    - - |
+          # ccache_stats
+          echo -e "\e[0Ksection_start:`date +%s`:ccache_stats[collapsed=true]\r\e[0Kccache statistics:"
+      - ccache --show-stats --verbose
+      - ccache --show-log-stats --verbose
+      - |
+          # ccahe_stats
+          echo -e "\e[0Ksection_end:`date +%s`:ccache_stats\r\e[0K"
+
+stages:
+  - build
+
+Debian testing GCC:
+  stage: build
+  image: debian:testing-slim
+
+  allow_failure: true
+
+  artifacts:
+    name: "$CI_PROJECT_PATH_SLUG-$CI_COMMIT_REF_SLUG-$CI_COMMIT_SHORT_SHA-testing-gcc"
+
+  variables:
+    CC: gcc
+    LDFLAGS: -Wl,-fuse-ld=gold
+
+  script:
+    - - |
+          # apt_toolchain
+          echo -e "\e[0Ksection_start:`date +%s`:apt_toolchain[collapsed=true]\r\e[0KInstalling toolchain packages"
+      - apt-get install gcc
+      - |
+          # apt_toolchain
+          echo -e "\e[0Ksection_end:`date +%s`:apt_toolchain\r\e[0K"
+
+    - - |
+          # apt_development
+          echo -e "\e[0Ksection_start:`date +%s`:apt_development[collapsed=true]\r\e[0KInstalling development packages"
+      - apt-get install libsdl2-mixer-dev libpng-dev libcurl4-openssl-dev libgme-dev libopenmpt-dev
+      - |
+          # apt_development
+          echo -e "\e[0Ksection_end:`date +%s`:apt_development\r\e[0K"
+
+    - - |
+          # make
+          echo -e "\e[0Ksection_start:`date +%s`:make[collapsed=false]\r\e[0KCompiling SRB2"
+      - make --directory=src --keep-going CCACHE=1 ERRORMODE=1 NONX86=1 || make --directory=src --keep-going CCACHE=1 ERRORMODE=1 NONX86=1
+      - |
+          # make
+          echo -e "\e[0Ksection_end:`date +%s`:make\r\e[0K"
+
+Windows x86:
+  stage: build
+
+  artifacts:
+    paths:
+      - "bin/"
+      - "src/comptime.h"
+    expose_as: "Win32"
+    name: "$CI_PROJECT_PATH_SLUG-$CI_COMMIT_REF_SLUG-$CI_COMMIT_SHORT_SHA-Win32"
+
+  variables:
+    PREFIX: i686-w64-mingw32
+
+  script:
+    - - |
+          # apt_toolchain
+          echo -e "\e[0Ksection_start:`date +%s`:apt_toolchain[collapsed=true]\r\e[0KInstalling toolchain packages"
+      - apt-get install gcc-mingw-w64-i686-win32
+      - |
+          # apt_toolchain
+          echo -e "\e[0Ksection_end:`date +%s`:apt_toolchain\r\e[0K"
+
+    - - |
+          # make
+          echo -e "\e[0Ksection_start:`date +%s`:make[collapsed=false]\r\e[0KCompiling SRB2"
+      - make --directory=src --keep-going CCACHE=1 ERRORMODE=1 MINGW=1 SDL=1 || make --directory=src --keep-going CCACHE=1 ERRORMODE=1 MINGW=1 SDL=1
+      - |
+          # make
+          echo -e "\e[0Ksection_end:`date +%s`:make\r\e[0K"
+
+Debian stable:amd64:
+  stage: build
+
+  artifacts:
+    paths:
+      - "bin/"
+      - "src/comptime.h"
+    expose_as: "Debian amd64"
+    name: "$CI_PROJECT_PATH_SLUG-$CI_COMMIT_REF_SLUG-$CI_COMMIT_SHORT_SHA-x86-64"
+
+  variables:
+    CC: x86_64-linux-gnu-gcc
+    LDFLAGS: -Wl,-fuse-ld=gold
+    OBJCOPY: x86_64-linux-gnu-objcopy
+    OBJDUMP: x86_64-linux-gnu-objdump
+    PKG_CONFIG_PATH: /usr/lib/x86_64-linux-gnu/pkgconfig
+
+  script:
+    - - |
+          # apt_toolchain
+          echo -e "\e[0Ksection_start:`date +%s`:apt_toolchain[collapsed=true]\r\e[0KInstalling toolchain packages"
+      - apt-get install gcc-x86-64-linux-gnu || apt-get install gcc
+      - |
+          # apt_toolchain
+          echo -e "\e[0Ksection_end:`date +%s`:apt_toolchain\r\e[0K"
+
+    - - |
+          # apt_development
+          echo -e "\e[0Ksection_start:`date +%s`:apt_development[collapsed=true]\r\e[0KInstalling development packages"
+      - apt-get install libsdl2-mixer-dev:amd64 libpng-dev:amd64 libcurl4-openssl-dev:amd64 libgme-dev:amd64 libopenmpt-dev:amd64
+      - |
+          # apt_development
+          echo -e "\e[0Ksection_end:`date +%s`:apt_development\r\e[0K"
+
+    - - |
+          # make
+          echo -e "\e[0Ksection_start:`date +%s`:make[collapsed=false]\r\e[0KCompiling SRB2"
+      - make --directory=src --keep-going CCACHE=1 ERRORMODE=1 LINUX64=1 || make --directory=src --keep-going CCACHE=1 ERRORMODE=1 LINUX64=1
+      - |
+          # make
+          echo -e "\e[0Ksection_end:`date +%s`:make\r\e[0K"
+
+Debian stable:i386:
+  stage: build
+
+  artifacts:
+    paths:
+      - "bin/"
+      - "src/comptime.h"
+    expose_as: "Debian i386"
+    name: "$CI_PROJECT_PATH_SLUG-$CI_COMMIT_REF_SLUG-$CI_COMMIT_SHORT_SHA-i686"
+
+  variables:
+    CC: i686-linux-gnu-gcc
+    OBJCOPY: i686-linux-gnu-objcopy
+    OBJDUMP: i686-linux-gnu-objdump
+    PKG_CONFIG_PATH: /usr/lib/i386-linux-gnu/pkgconfig
+
+  script:
+    - - |
+          # apt_toolchain
+          echo -e "\e[0Ksection_start:`date +%s`:apt_toolchain[collapsed=true]\r\e[0KInstalling toolchain packages"
+      - apt-get install gcc-i686-linux-gnu || apt-get install gcc
+      - |
+          # apt_toolchain
+          echo -e "\e[0Ksection_end:`date +%s`:apt_toolchain\r\e[0K"
+
+    - - |
+          # apt_development
+          echo -e "\e[0Ksection_start:`date +%s`:apt_development[collapsed=true]\r\e[0KInstalling development packages"
+      - apt-get install libsdl2-mixer-dev:i386 libpng-dev:i386 libcurl4-openssl-dev:i386 libgme-dev:i386 libopenmpt-dev:i386
+      - |
+          # apt_development
+          echo -e "\e[0Ksection_end:`date +%s`:apt_development\r\e[0K"
+
+    - - |
+          # make
+          echo -e "\e[0Ksection_start:`date +%s`:make[collapsed=false]\r\e[0KCompiling SRB2"
+      - make --directory=src --keep-going CCACHE=1 ERRORMODE=1 LINUX=1 || make --directory=src --keep-going CCACHE=1 ERRORMODE=1 LINUX=1
+      - |
+          # make
+          echo -e "\e[0Ksection_end:`date +%s`:make\r\e[0K"
+
+Debian stable:arm64:
+  stage: build
+
+  artifacts:
+    paths:
+      - "bin/"
+      - "src/comptime.h"
+    expose_as: "Debian arm64"
+    name: "$CI_PROJECT_PATH_SLUG-$CI_COMMIT_REF_SLUG-$CI_COMMIT_SHORT_SHA-aarch64"
+
+  variables:
+    CC: aarch64-linux-gnu-gcc
+    LDFLAGS: -Wl,-fuse-ld=gold
+    OBJCOPY: aarch64-linux-gnu-objcopy
+    OBJDUMP: aarch64-linux-gnu-objdump
+    PKG_CONFIG_PATH: /usr/lib/aarch64-linux-gnu/pkgconfig
+
+  script:
+    - - |
+          # apt_toolchain
+          echo -e "\e[0Ksection_start:`date +%s`:apt_toolchain[collapsed=true]\r\e[0KInstalling toolchain packages"
+      - apt-get install gcc-aarch64-linux-gnu || apt-get install gcc
+      - |
+          # apt_toolchain
+          echo -e "\e[0Ksection_end:`date +%s`:apt_toolchain\r\e[0K"
+
+    - - |
+          # apt_development
+          echo -e "\e[0Ksection_start:`date +%s`:apt_development[collapsed=true]\r\e[0KInstalling development packages"
+      - apt-get install libsdl2-mixer-dev:arm64 libpng-dev:arm64 libcurl4-openssl-dev:arm64 libgme-dev:arm64 libopenmpt-dev:arm64
+      - |
+          # apt_development
+          echo -e "\e[0Ksection_end:`date +%s`:apt_development\r\e[0K"
+
+    - - |
+          # make
+          echo -e "\e[0Ksection_start:`date +%s`:make[collapsed=false]\r\e[0KCompiling SRB2"
+      - make --directory=src --keep-going CCACHE=1 ERRORMODE=1 LINUX64=1 ERRORMODE=1 NONX86=1 || make --directory=src --keep-going CCACHE=1 ERRORMODE=1 LINUX64=1 NONX86=1
+      - |
+          # make
+          echo -e "\e[0Ksection_end:`date +%s`:make\r\e[0K"
+
+Windows x64:
+  stage: build
+
+  artifacts:
+    paths:
+      - "bin/"
+      - "src/comptime.h"
+    expose_as: "Win64"
+    name: "$CI_PROJECT_PATH_SLUG-$CI_COMMIT_REF_SLUG-$CI_COMMIT_SHORT_SHA-Win64"
+
+  variables:
+    PREFIX: x86_64-w64-mingw32
+
+  script:
+    - - |
+          # apt_toolchain
+          echo -e "\e[0Ksection_start:`date +%s`:apt_toolchain[collapsed=true]\r\e[0KInstalling toolchain packages"
+      - apt-get install gcc-mingw-w64-x86-64-win32
+      - |
+          # apt_toolchain
+          echo -e "\e[0Ksection_end:`date +%s`:apt_toolchain\r\e[0K"
+
+    - - |
+          # make
+          echo -e "\e[0Ksection_start:`date +%s`:make[collapsed=false]\r\e[0KCompiling SRB2"
+      - make --directory=src --keep-going CCACHE=1 ERRORMODE=1 MINGW64=1 SDL=1 || make --directory=src --keep-going CCACHE=1 ERRORMODE=1 MINGW64=1 SDL=1
+      - |
+          # make
+          echo -e "\e[0Ksection_end:`date +%s`:make\r\e[0K"
+
+Debian stable Clang:
+  stage: build
+
+  allow_failure: true
+
+  artifacts:
+    name: "$CI_PROJECT_PATH_SLUG-$CI_COMMIT_REF_SLUG-$CI_COMMIT_SHORT_SHA-clang"
+
+  variables:
+    CC: clang
+    WFLAGS: -Wno-cast-align
+    CFLAGS: -Wno-cast-align
+    LDFLAGS: -Wl,-fuse-ld=gold
+
+  script:
+    - - |
+          # apt_toolchain
+          echo -e "\e[0Ksection_start:`date +%s`:apt_toolchain[collapsed=true]\r\e[0KInstalling toolchain packages"
+      - apt-get install clang
+      - |
+          # apt_toolchain
+          echo -e "\e[0Ksection_end:`date +%s`:apt_toolchain\r\e[0K"
+
+    - - |
+          # apt_development
+          echo -e "\e[0Ksection_start:`date +%s`:apt_development[collapsed=true]\r\e[0KInstalling development packages"
+      - apt-get install libsdl2-mixer-dev libpng-dev libcurl4-openssl-dev libgme-dev libopenmpt-dev
+      - |
+          # apt_development
+          echo -e "\e[0Ksection_end:`date +%s`:apt_development\r\e[0K"
+
+    - - |
+          # make
+          echo -e "\e[0Ksection_start:`date +%s`:make[collapsed=false]\r\e[0KCompiling SRB2"
+      - make --directory=src --keep-going CCACHE=1 ERRORMODE=1 NONX86=1 || make --directory=src --keep-going CCACHE=1 ERRORMODE=1 NONX86=1
+      - |
+          # make
+          echo -e "\e[0Ksection_end:`date +%s`:make\r\e[0K"
+
+Debian testing Clang:
+  extends: Debian stable Clang
+
+  image: debian:testing-slim
+
+  artifacts:
+    name: "$CI_PROJECT_PATH_SLUG-$CI_COMMIT_REF_SLUG-$CI_COMMIT_SHORT_SHA-testing-clang"
+
+  variables:
+    CC: clang
+    WFLAGS: -Wno-cast-align -Wno-deprecated-non-prototype
+    CFLAGS: -Wno-cast-align -Wno-deprecated-non-prototype
+    LDFLAGS: -Wl,-fuse-ld=gold
diff --git a/cpdebug.mk b/cpdebug.mk
index 6baedf2275db4bbb06606a646cce9a4cb2c1d35e..75f08c66f4af721939c6f6c904aefc62f0d75534 100644
--- a/cpdebug.mk
+++ b/cpdebug.mk
@@ -3,12 +3,12 @@ ifdef ComSpec
 COMSPEC=$(ComSpec)
 endif
 ifdef COMSPEC
-OBJCOPY=objcopy.exe
-OBJDUMP=objdump.exe
+OBJCOPY?=objcopy.exe
+OBJDUMP?=objdump.exe
 GZIP?=gzip.exe
 else
-OBJCOPY=objcopy
-OBJDUMP=objdump
+OBJCOPY?=objcopy
+OBJDUMP?=objdump
 GZIP?=gzip
 endif
 DBGNAME=$(BIN).debug
diff --git a/src/Makefile b/src/Makefile
index 41cef2a179383670247847bcd572a651c1b8aad6..539c2fa743cc46071c94b8736c49802e6034e62c 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -141,9 +141,9 @@ endif
 
 OBJDUMP_OPTS?=--wide --source --line-numbers
 
-OBJCOPY:=$(call Prefix,objcopy)
-OBJDUMP:=$(call Prefix,objdump)
-WINDRES:=$(call Prefix,windres)
+OBJCOPY?=$(call Prefix,objcopy)
+OBJDUMP?=$(call Prefix,objdump)
+WINDRES?=$(call Prefix,windres)
 
 GZIP?=gzip
 GZIP_OPTS?=-9 -f -n
diff --git a/src/Makefile.d/detect.mk b/src/Makefile.d/detect.mk
index aca4987213419adb6d93056a8413c2d0330ae057..9e27369462b00c407f02cb95dbda22ef284a91d1 100644
--- a/src/Makefile.d/detect.mk
+++ b/src/Makefile.d/detect.mk
@@ -56,15 +56,18 @@ endif
 
 # This must have high to low order.
 gcc_versions:=\
-	102 101\
-	93 92 91\
-	84 83 82 81\
-	75 74 73 72 71\
-	64 63 62 61\
-	55 54 53 52 51\
+	132 131 130\
+	123 122 121 120\
+	114 113 112 111 110\
+	105 104 103 102 101 100\
+	95 94 93 92 91 90\
+	85 84 83 82 81 80\
+	75 74 73 72 71 70\
+	64 63 62 61 60\
+	55 54 53 52 51 50\
 	49 48 47 46 45 44 43 42 41 40
 
-latest_gcc_version:=10.2
+latest_gcc_version:=13.2
 
 # Automatically set version flag, but not if one was
 # manually set. And don't bother if this is a clean only
@@ -74,13 +77,18 @@ ifeq (,$(call Wildvar,GCC% destructive))
 # can't use $(CC) --version here since that uses argv[0] to display the name
 # also gcc outputs the information to stderr, so I had to do 2>&1
 # this program really doesn't like identifying itself
-version:=$(shell $(CC) -v 2>&1)
+shellversion:=$(shell $(CC) -v 2>&1)
+# Try to remove "-win32"
+version:=$(subst -win32,.0,$(shellversion))
 
 # check if this is in fact GCC
 ifneq (,$(findstring gcc version,$(version)))
 
 # in stark contrast to the name, gcc will give me a nicely formatted version number for free
-version:=$(shell $(CC) -dumpfullversion)
+shellversion:=$(shell $(CC) -dumpfullversion)
+
+# Try to remove "-win32"
+version:=$(subst -win32,.0,$(shellversion))
 
 # Turn version into words of major, minor
 v:=$(subst ., ,$(version))
diff --git a/src/Makefile.d/features.mk b/src/Makefile.d/features.mk
index 1787f94cb8988e6b27d5bb334c5a978ef2b31947..a66779c07a77c72a4ae0c085ff738ce58e62cf73 100644
--- a/src/Makefile.d/features.mk
+++ b/src/Makefile.d/features.mk
@@ -1,68 +1,72 @@
-#
-# Makefile for feature flags.
-#
-
-passthru_opts+=\
-	NONET NO_IPV6 NOHW NOMD5 NOPOSTPROCESSING\
-	MOBJCONSISTANCY PACKETDROP ZDEBUG\
-	HAVE_MINIUPNPC\
-
-# build with debugging information
-ifdef DEBUGMODE
-PACKETDROP=1
-opts+=-DPARANOIA -DRANGECHECK
-endif
-
-ifndef NOHW
-opts+=-DHWRENDER
-sources+=$(call List,hardware/Sourcefile)
-endif
-
-ifndef NOMD5
-sources+=md5.c
-endif
-
-ifndef NOZLIB
-ifndef NOPNG
-ifdef PNG_PKGCONFIG
-$(eval $(call Use_pkg_config,PNG_PKGCONFIG))
-else
-PNG_CONFIG?=$(call Prefix,libpng-config)
-$(eval $(call Configure,PNG,$(PNG_CONFIG) \
-	$(if $(PNG_STATIC),--static),,--ldflags))
-endif
-ifdef LINUX
-opts+=-D_LARGEFILE64_SOURCE
-endif
-opts+=-DHAVE_PNG
-sources+=apng.c
-endif
-endif
-
-ifndef NONET
-ifndef NOCURL
-CURLCONFIG?=curl-config
-$(eval $(call Configure,CURL,$(CURLCONFIG)))
-opts+=-DHAVE_CURL
-endif
-endif
-
-ifdef HAVE_MINIUPNPC
-libs+=-lminiupnpc
-endif
-
-# (Valgrind is a memory debugger.)
-ifdef VALGRIND
-VALGRIND_PKGCONFIG?=valgrind
-$(eval $(call Use_pkg_config,VALGRIND))
-ZDEBUG=1
-opts+=-DHAVE_VALGRIND
-endif
-
-default_packages:=\
-	GME/libgme/LIBGME\
-	OPENMPT/libopenmpt/LIBOPENMPT\
-	ZLIB/zlib\
-
-$(foreach p,$(default_packages),\
-	$(eval $(call Check_pkg_config,$(p))))
+#
+# Makefile for feature flags.
+#
+
+passthru_opts+=\
+	NONET NO_IPV6 NOHW NOMD5 NOPOSTPROCESSING\
+	MOBJCONSISTANCY PACKETDROP ZDEBUG\
+	HAVE_MINIUPNPC\
+
+# build with debugging information
+ifdef DEBUGMODE
+PACKETDROP=1
+opts+=-DPARANOIA -DRANGECHECK
+endif
+
+ifndef NOHW
+opts+=-DHWRENDER
+sources+=$(call List,hardware/Sourcefile)
+endif
+
+ifdef NONET
+NOCURL=1
+endif
+
+ifndef NOMD5
+sources+=md5.c
+endif
+
+ifndef NOZLIB
+ifndef NOPNG
+ifdef PNG_PKGCONFIG
+$(eval $(call Use_pkg_config,PNG_PKGCONFIG))
+else
+PNG_CONFIG?=$(call Prefix,libpng-config)
+$(eval $(call Configure,PNG,$(PNG_CONFIG) \
+	$(if $(PNG_STATIC),--static),,--ldflags))
+endif
+ifdef LINUX
+opts+=-D_LARGEFILE64_SOURCE
+endif
+opts+=-DHAVE_PNG
+sources+=apng.c
+endif
+endif
+
+ifndef NONET
+ifndef NOCURL
+CURLCONFIG?=curl-config
+$(eval $(call Configure,CURL,$(CURLCONFIG)))
+opts+=-DHAVE_CURL
+endif
+endif
+
+ifdef HAVE_MINIUPNPC
+libs+=-lminiupnpc
+endif
+
+# (Valgrind is a memory debugger.)
+ifdef VALGRIND
+VALGRIND_PKGCONFIG?=valgrind
+$(eval $(call Use_pkg_config,VALGRIND))
+ZDEBUG=1
+opts+=-DHAVE_VALGRIND
+endif
+
+default_packages:=\
+	GME/libgme/LIBGME\
+	OPENMPT/libopenmpt/LIBOPENMPT\
+	ZLIB/zlib\
+
+$(foreach p,$(default_packages),\
+	$(eval $(call Check_pkg_config,$(p))))
diff --git a/src/d_clisrv.c b/src/d_clisrv.c
index 83482b527c3354f5c2b6f81cc2e47f66b108c2b1..1ec9cf1e94b9fcbe2c135109cd4fb52031945620 100755
--- a/src/d_clisrv.c
+++ b/src/d_clisrv.c
@@ -2743,7 +2743,6 @@ static void Command_ClearBans(void)
 static void Ban_Load_File(boolean warning)
 {
 	FILE *f;
-	size_t i;
 	const char *address, *mask;
 	char buffer[MAX_WADPATH];
 
@@ -2761,7 +2760,7 @@ static void Ban_Load_File(boolean warning)
 
 	Ban_Clear();
 
-	for (i=0; fgets(buffer, (int)sizeof(buffer), f); i++)
+	for (; fgets(buffer, (int)sizeof(buffer), f);)
 	{
 		address = strtok(buffer, " \t\r\n");
 		mask = strtok(NULL, " \t\r\n");
diff --git a/src/dummy/i_system.c b/src/dummy/i_system.c
index 125d2e8aec897f288995649aec2476989b4136d6..70e1ef4ec2b7aba9699731c0d743733750bc26fc 100644
--- a/src/dummy/i_system.c
+++ b/src/dummy/i_system.c
@@ -14,13 +14,18 @@ size_t I_GetFreeMem(size_t *total)
 	return 0;
 }
 
-void I_Sleep(UINT32 ms){}
+void I_Sleep(UINT32 ms)
+{
+	(void)ms;
+}
 
-precise_t I_GetPreciseTime(void) {
+precise_t I_GetPreciseTime(void)
+{
 	return 0;
 }
 
-UINT64 I_GetPrecisePrecision(void) {
+UINT64 I_GetPrecisePrecision(void)
+{
 	return 1000000;
 }
 
@@ -182,10 +187,12 @@ const char *I_ClipboardPaste(void)
 
 size_t I_GetRandomBytes(char *destination, size_t amount)
 {
+	(void)destination;
+	(void)amount;
 	return 0;
 }
 
-void I_RegisterSysCommands(void) {}
+void I_RegisterSysCommands(void){}
 
 void I_GetCursorPosition(INT32 *x, INT32 *y)
 {
diff --git a/src/hardware/hw_batching.c b/src/hardware/hw_batching.c
index ff2fd72f2c1547454c8a0cd0a01e08a97e7ebc44..0b8defb90899840ffbe5e18ba37b5ff34f75cafd 100644
--- a/src/hardware/hw_batching.c
+++ b/src/hardware/hw_batching.c
@@ -42,10 +42,10 @@ int unsortedVertexArrayAllocSize = 65536;
 // Call HWR_RenderBatches to render all the collected geometry.
 void HWR_StartBatching(void)
 {
-    if (currently_batching)
-        I_Error("Repeat call to HWR_StartBatching without HWR_RenderBatches");
+	if (currently_batching)
+		I_Error("Repeat call to HWR_StartBatching without HWR_RenderBatches");
 
-    // init arrays if that has not been done yet
+	// init arrays if that has not been done yet
 	if (!finalVertexArray)
 	{
 		finalVertexArray = malloc(finalVertexArrayAllocSize * sizeof(FOutVector));
@@ -55,7 +55,7 @@ void HWR_StartBatching(void)
 		unsortedVertexArray = malloc(unsortedVertexArrayAllocSize * sizeof(FOutVector));
 	}
 
-    currently_batching = true;
+	currently_batching = true;
 }
 
 // This replaces the direct calls to pfnSetTexture in cases where batching is available.
diff --git a/src/hardware/hw_main.c b/src/hardware/hw_main.c
index d60026b28c8fbaeeb5ccb70f5544229f3a4e2615..d407c32482f97c4c2c955f5a487a7736077aaca5 100644
--- a/src/hardware/hw_main.c
+++ b/src/hardware/hw_main.c
@@ -4156,14 +4156,11 @@ static void HWR_DrawSprite(gl_vissprite_t *spr)
 		float xscale, yscale;
 		float xoffset, yoffset;
 		float leftoffset, topoffset;
-		float scale = spr->scale;
 		float zoffset = (P_MobjFlip(spr->mobj) * 0.05f);
 		pslope_t *splatslope = NULL;
 		INT32 i;
 
 		renderflags_t renderflags = spr->renderflags;
-		if (renderflags & RF_SHADOWEFFECTS)
-			scale *= spr->shadowscale;
 
 		if (spr->rotateflags & SRF_3D || renderflags & RF_NOSPLATBILLBOARD)
 			angle = spr->mobj->angle;
diff --git a/src/hardware/hw_md2.c b/src/hardware/hw_md2.c
index 3674541e39252409c7a4a94c2c0377a2564bbc33..0fbb326605e654391b0e7949619c2882b49f57c6 100644
--- a/src/hardware/hw_md2.c
+++ b/src/hardware/hw_md2.c
@@ -490,7 +490,7 @@ void HWR_InitModels(void)
 	size_t i;
 	INT32 s;
 	FILE *f;
-	char name[24], filename[32];
+	char name[26], filename[32];
 	float scale, offset;
 	size_t prefixlen;
 
@@ -589,7 +589,7 @@ modelfound:
 void HWR_AddPlayerModel(int skin) // For skins that were added after startup
 {
 	FILE *f;
-	char name[24], filename[32];
+	char name[26], filename[32];
 	float scale, offset;
 	size_t prefixlen;
 
@@ -648,7 +648,7 @@ void HWR_AddSpriteModel(size_t spritenum) // For sprites that were added after s
 	// name[24] is used to check for names in the models.dat file that match with sprites or player skins
 	// sprite names are always 4 characters long, and names is for player skins can be up to 19 characters long
 	// PLAYERMODELPREFIX is 6 characters long
-	char name[24], filename[32];
+	char name[26], filename[32];
 	float scale, offset;
 
 	if (nomd2s)
diff --git a/src/hardware/hw_model.c b/src/hardware/hw_model.c
index b69bce0e2da2dd5a453899720892187c5c71910c..4b6bce6f7b55834167d496a361c3936cd22cc8ac 100644
--- a/src/hardware/hw_model.c
+++ b/src/hardware/hw_model.c
@@ -672,6 +672,9 @@ void GeneratePolygonNormals(model_t *model, int ztag)
 
 			for (k = 0; k < mesh->numTriangles; k++)
 			{
+				/// TODO: normalize vectors
+				(void)vertices;
+				(void)polyNormals;
 //				Vector::Normal(vertices, polyNormals);
 				vertices += 3 * 3;
 				polyNormals++;
diff --git a/src/lua_baselib.c b/src/lua_baselib.c
index 4af5066aeb8df5a75b6091c205e932c72f6f2349..1d183cdec6b6a518f38ed32725ed5f19ec4a45cd 100644
--- a/src/lua_baselib.c
+++ b/src/lua_baselib.c
@@ -3544,7 +3544,7 @@ static int lib_gAddGametype(lua_State *L)
 // Partly lifted from Got_AddPlayer
 static int lib_gAddPlayer(lua_State *L)
 {
-	INT16 i, newplayernum, botcount = 1;
+	INT16 i, newplayernum;
 	player_t *newplayer;
 	SINT8 skinnum = 0, bot;
 
@@ -3552,10 +3552,8 @@ static int lib_gAddPlayer(lua_State *L)
 	{
 		if (!playeringame[i])
 			break;
-
-		if (players[i].bot)
-			botcount++; // How many of us are there already?
 	}
+
 	if (i >= MAXPLAYERS)
 	{
 		lua_pushnil(L);
diff --git a/src/p_map.c b/src/p_map.c
index 80135db7471058b85f7aadda2fef0c37e4ddba57..251837876caab9f979b92ef1ece83a1750f24768 100644
--- a/src/p_map.c
+++ b/src/p_map.c
@@ -3730,7 +3730,9 @@ void P_SlideMove(mobj_t *mo)
 
 	boolean papercol = false;
 	vertex_t v1, v2; // fake vertexes
-	line_t junk; // fake linedef
+	static line_t junk; // fake linedef
+
+	memset(&junk, 0x00, sizeof(junk));
 
 	if (tmhitthing && mo->z + mo->height > tmhitthing->z && mo->z < tmhitthing->z + tmhitthing->height)
 	{
diff --git a/src/sdl/i_system.c b/src/sdl/i_system.c
index 902194f4f332592f69f8b0f872bdf04f0159ba90..2a26f3f501f9c5708ec56d1f5624d087056f40ae 100644
--- a/src/sdl/i_system.c
+++ b/src/sdl/i_system.c
@@ -259,10 +259,10 @@ UINT8 keyboard_started = false;
 
 #ifdef UNIXBACKTRACE
 #define STDERR_WRITE(string) if (fd != -1) I_OutputMsg("%s", string)
-#define CRASHLOG_WRITE(string) if (fd != -1) write(fd, string, strlen(string))
+#define CRASHLOG_WRITE(string) if (fd != -1) junk = write(fd, string, strlen(string))
 #define CRASHLOG_STDERR_WRITE(string) \
 	if (fd != -1)\
-		write(fd, string, strlen(string));\
+		junk = write(fd, string, strlen(string));\
 	I_OutputMsg("%s", string)
 
 static void write_backtrace(INT32 signal)
@@ -271,6 +271,7 @@ static void write_backtrace(INT32 signal)
 	size_t size;
 	time_t rawtime;
 	struct tm timeinfo;
+	ssize_t junk;
 
 	enum { BT_SIZE = 1024, STR_SIZE = 32 };
 	void *array[BT_SIZE];
@@ -314,7 +315,7 @@ static void write_backtrace(INT32 signal)
 	backtrace_symbols_fd(array, size, STDERR_FILENO);
 
 	CRASHLOG_WRITE("\n"); // Write another newline to the log so it looks nice :)
-
+	(void)junk;
 	close(fd);
 }
 #undef STDERR_WRITE
@@ -405,8 +406,10 @@ static void I_ReportSignal(int num, int coredumped)
 
 	SDL_ShowMessageBox(&messageboxdata, &buttonid);
 
+#if SDL_VERSION_ATLEAST(2,0,14)
 	if (buttonid == 1)
 		SDL_OpenURL("https://www.srb2.org/discord");
+#endif
 }
 
 #ifndef NEWSIGNALHANDLER
@@ -2262,7 +2265,7 @@ void I_Sleep(UINT32 ms)
 }
 
 #ifdef NEWSIGNALHANDLER
-static void newsignalhandler_Warn(const char *pr)
+ATTRNORETURN static FUNCNORETURN void newsignalhandler_Warn(const char *pr)
 {
 	char text[128];
 
@@ -3035,11 +3038,11 @@ size_t I_GetFreeMem(size_t *total)
 #ifdef FREEBSD
 	u_int v_free_count, v_page_size, v_page_count;
 	size_t size = sizeof(v_free_count);
-	sysctlbyname("vm.stat.vm.v_free_count", &v_free_count, &size, NULL, 0);
-	size_t size = sizeof(v_page_size);
-	sysctlbyname("vm.stat.vm.v_page_size", &v_page_size, &size, NULL, 0);
-	size_t size = sizeof(v_page_count);
-	sysctlbyname("vm.stat.vm.v_page_count", &v_page_count, &size, NULL, 0);
+	sysctlbyname("vm.stats.vm.v_free_count", &v_free_count, &size, NULL, 0);
+	size = sizeof(v_page_size);
+	sysctlbyname("vm.stats.vm.v_page_size", &v_page_size, &size, NULL, 0);
+	size = sizeof(v_page_count);
+	sysctlbyname("vm.stats.vm.v_page_count", &v_page_count, &size, NULL, 0);
 
 	if (total)
 		*total = v_page_count * v_page_size;