build: default to llvm toolchain

.github/workflows/create_release.yml

@@ -18,7 +18,7 @@ jobs:
     name: Create Release
     runs-on: ubuntu-latest
     container:
-      image: hansbinderup/meson-gcc:1.2
+      image: hansbinderup/meson-gcc:1.3
       options: --user root
     steps:
       - name: Checkout

.github/workflows/pull_request.yml

@@ -14,7 +14,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     container:
-      image: hansbinderup/meson-gcc:1.2
+      image: hansbinderup/meson-gcc:1.3
       options: --user root
     steps:
     - name: Checkout
@@ -29,7 +29,7 @@ jobs:
   unit-tests:
     runs-on: ubuntu-latest
     container:
-      image: hansbinderup/meson-gcc:1.2
+      image: hansbinderup/meson-gcc:1.3
       options: --user root
     steps:
     - name: Checkout
@@ -51,7 +51,7 @@ jobs:
   verify-bench:
     runs-on: ubuntu-latest
     container:
-      image: hansbinderup/meson-gcc:1.2
+      image: hansbinderup/meson-gcc:1.3
       options: --user root
     steps:
     - name: Checkout
@@ -67,7 +67,7 @@ jobs:
   build-tuner:
     runs-on: ubuntu-latest
     container:
-      image: hansbinderup/meson-gcc:1.2
+      image: hansbinderup/meson-gcc:1.3
       options: --user root
     steps:
     - name: Checkout
@@ -82,7 +82,7 @@ jobs:
   build-spsa:
     runs-on: ubuntu-latest
     container:
-      image: hansbinderup/meson-gcc:1.2
+      image: hansbinderup/meson-gcc:1.3
       options: --user root
     steps:
     - name: Checkout

README.md

@@ -48,7 +48,7 @@ All binaries are statically compiled so it should be easy to run.
 
 This is the preferred way. It is very useful for quick development and ensures that you use setups verified by the developers.
 
-The build scripts currently support Linux and Windows. The OS is automatically detected on build.
+The build scripts currently support Linux and Windows. The OS is automatically detected on build. The scripts default to `clang++` as they've proven to be the fastest runtime. If you're compiling outside of docker then be aware of this.
 
 #### Building with Docker
 

docker/Dockerfile

@@ -2,19 +2,35 @@
 FROM archlinux:latest
 
 # Install necessary packages
-RUN pacman -Sy --noconfirm \
+RUN pacman -Syu --noconfirm \
+    && pacman -Sy --noconfirm \
     base-devel \
     clang \
     gcc \
     mingw-w64-gcc \
+    lld \
+    llvm \
     meson \
     ninja \
     gdb \
     git \
     cmake \
+    wget \
+    libxml2 \
+    openmp \
     python \
-    python-pip \
-    && pacman -Scc --noconfirm  # Clean package cache
+    python-pip
+
+# Download and install LLVM-Mingw toolchain
+RUN cd /tmp \
+    && wget -O llvm-mingw.tar.xz https://github.com/mstorsjo/llvm-mingw/releases/download/20250613/llvm-mingw-20250613-ucrt-ubuntu-22.04-x86_64.tar.xz \
+    && mkdir -p llvm-mingw \
+    && tar -xf llvm-mingw.tar.xz -C llvm-mingw --strip-components=1 \
+    && mv llvm-mingw /opt/llvm-mingw \
+    && rm -rf /tmp/*
+
+# add clang-llvm to path
+ENV PATH="/opt/llvm-mingw/bin:${PATH}"
 
 # Set the working directory
 WORKDIR /workspace

docker/build.sh

@@ -1,4 +1,4 @@
 #!/bin/bash
 
 # NOTE: should be run from directory of Dockerfile
-docker build -t hansbinderup/meson-gcc:1.2 .
+docker build -t hansbinderup/meson-gcc:1.3 .

docker/run.sh

@@ -6,4 +6,4 @@ args="--privileged \
     -w /workspaces/$(basename "$(pwd)")"
 
 
-docker run -it $args hansbinderup/meson-gcc:1.2
+docker run -it $args hansbinderup/meson-gcc:1.3

meson.build

@@ -6,7 +6,7 @@ project('meltdown-chess-engine', 'cpp',
 subdir('version')
 
 if get_option('buildtype') != 'debug'
-  add_project_arguments('-flto=auto', '-Ofast', '-funroll-loops', '-m64', '-finline-functions',  language : 'cpp')
+  add_project_arguments('-ffast-math', '-fno-finite-math-only', '-funroll-loops', '-m64', '-finline-functions',  language : 'cpp')
 
   # allows developers to have a safer build - easier to debug with minimal runtime cost
   if get_option('developer-build') == false
@@ -36,11 +36,12 @@ meltdown_dep = declare_dependency(
 )
 
 # statically link the C++ standard library and libgcc to avoid runtime issues
+add_project_link_arguments('-static-libgcc', '-static-libstdc++', language: 'cpp')
+
 # use full static linking (-static) only on Windows to avoid DLL dependencies
+# NOTE: is not a good idea to do on linux
 if host_machine.system() == 'windows'
-  add_project_link_arguments('-static', '-static-libgcc', '-static-libstdc++', language: 'cpp')
-else
-  add_project_link_arguments('-static-libgcc', '-static-libstdc++', language: 'cpp')
+  add_project_link_arguments('-static', language: 'cpp')
 endif
 
 # build tuner instead of meltdown engine

scripts/create_release.sh

@@ -11,10 +11,10 @@ RELEASE_DIR=".release"
 # List of elements that we cross compile.
 # They refer to the .txt files in our 'targets' folder
 ARCHS=(
-    "linux-gcc-x86-64-v2" 
-    "linux-gcc-x86-64-v3"
-    "windows-gcc-x86-64-v2"
-    "windows-gcc-x86-64-v3"
+    "linux-x86-64-v2"
+    "linux-x86-64-v3"
+    "windows-x86-64-v2"
+    "windows-x86-64-v3"
 )
 
 # Ensure that we always have an empty release folder

targets/linux-native.txt

@@ -1,8 +1,10 @@
 [binaries]
-c = 'x86_64-linux-gnu-gcc'
-cpp = 'x86_64-linux-gnu-g++'
-ar = 'x86_64-linux-gnu-gcc-ar'
-strip = 'strip'
+c = 'clang'
+cpp = 'clang++'
+ar = 'llvm-ar'
+strip = 'llvm-strip'
+c_ld = 'lld'
+cpp_ld = 'lld'
 
 [host_machine]
 system = 'linux'

targets/linux-x86-64-v2.txt

@@ -0,0 +1,17 @@
+[binaries]
+c = 'clang'
+cpp = 'clang++'
+ar = 'llvm-ar'
+strip = 'llvm-strip'
+c_ld = 'lld'
+cpp_ld = 'lld'
+
+[host_machine]
+system = 'linux'
+cpu_family = 'x86_64'
+cpu = 'x86_64'
+endian = 'little'
+
+[built-in options]
+cpp_args = ['-march=x86-64-v2']
+c_args = ['-march=x86-64-v2']

targets/linux-x86-64-v3.txt

@@ -0,0 +1,17 @@
+[binaries]
+c = 'clang'
+cpp = 'clang++'
+ar = 'llvm-ar'
+strip = 'llvm-strip'
+c_ld = 'lld'
+cpp_ld = 'lld'
+
+[host_machine]
+system = 'linux'
+cpu_family = 'x86_64'
+cpu = 'x86_64'
+endian = 'little'
+
+[built-in options]
+cpp_args = ['-march=x86-64-v3']
+c_args = ['-march=x86-64-v3']

targets/windows-gcc-x86-64-v2.txt

@@ -11,6 +11,9 @@ cpu_family = 'x86_64'
 cpu = 'x86_64'
 endian = 'little'
 
+[properties]
+needs_exe_wrapper = true
+
 [built-in options]
 cpp_args = ['-march=x86-64-v2', '-static']
 c_args = ['-march=x86-64-v2', '-static']

targets/windows-gcc-x86-64-v3.txt

@@ -11,7 +11,10 @@ cpu_family = 'x86_64'
 cpu = 'x86_64'
 endian = 'little'
 
+[properties]
+needs_exe_wrapper = true
+
 [built-in options]
-cpp_args = ['-march=x86-64-v3', '-static']
-c_args = ['-march=x86-64-v3', '-static']
+cpp_args = ['-march=x86-64-v3']
+c_args = ['-march=x86-64-v3']
 default_library = 'static'

targets/windows-native.txt

@@ -1,16 +1,22 @@
 [binaries]
-c = 'x86_64-w64-mingw32-gcc'
-cpp = 'x86_64-w64-mingw32-g++'
-ar = 'x86_64-w64-mingw32-gcc-ar'
-strip = 'x86_64-w64-mingw32-strip'
+c = 'x86_64-w64-mingw32-clang'
+cpp = 'x86_64-w64-mingw32-clang++'
+ar = 'x86_64-w64-mingw32-ar'
+strip = 'llvm-strip'
+windres = 'x86_64-w64-mingw32-windres'
+c_ld = 'lld'
+cpp_ld = 'lld'
 
 [host_machine]
 system = 'windows'
 cpu_family = 'x86_64'
 cpu = 'x86_64'
 endian = 'little'
 
+[properties]
+needs_exe_wrapper = true
+
 [built-in options]
-cpp_args = ['-march=native', '-static']
-c_args = ['-march=native', '-static']
+cpp_args = ['-march=native']
+c_args = ['-march=native']
 default_library = 'static'

targets/windows-x86-64-v2.txt

@@ -0,0 +1,22 @@
+[binaries]
+c = 'x86_64-w64-mingw32-clang'
+cpp = 'x86_64-w64-mingw32-clang++'
+ar = 'x86_64-w64-mingw32-ar'
+strip = 'llvm-strip'
+windres = 'x86_64-w64-mingw32-windres'
+c_ld = 'lld'
+cpp_ld = 'lld'
+
+[host_machine]
+system = 'windows'
+cpu_family = 'x86_64'
+cpu = 'x86_64'
+endian = 'little'
+
+[properties]
+needs_exe_wrapper = true
+
+[built-in options]
+cpp_args = ['-march=x86-64-v2']
+c_args = ['-march=x86-64-v2']
+default_library = 'static'

targets/windows-x86-64-v3.txt

@@ -0,0 +1,22 @@
+[binaries]
+c = 'x86_64-w64-mingw32-clang'
+cpp = 'x86_64-w64-mingw32-clang++'
+ar = 'x86_64-w64-mingw32-ar'
+strip = 'llvm-strip'
+windres = 'x86_64-w64-mingw32-windres'
+c_ld = 'lld'
+cpp_ld = 'lld'
+
+[host_machine]
+system = 'windows'
+cpu_family = 'x86_64'
+cpu = 'x86_64'
+endian = 'little'
+
+[properties]
+needs_exe_wrapper = true
+
+[built-in options]
+cpp_args = ['-march=x86-64-v3']
+c_args = ['-march=x86-64-v3']
+default_library = 'static'