Mold (#14)

Reviewed-on: #14
Co-authored-by: Romain BOULLARD <romain.boullard@protonmail.com>
Co-committed-by: Romain BOULLARD <romain.boullard@protonmail.com>

.gitea/workflows/ci.yml

@@ -10,7 +10,6 @@ env:
   CCACHE_DIR: /ccache
   CCACHE_MAXSIZE: 10G
   CCACHE_BASEDIR: /root/.conan2
-  CCACHE_NOHASHDIR: "true"
   CCACHE_COMPILERCHECK: "%compiler% -dumpversion"
 
 jobs:
@@ -25,6 +24,8 @@ jobs:
     strategy:
       matrix:
         package: [
+          { name: "mold", version: "2.41.0", location: "all" },
+
           { name: "eabase", version: "01082025", location: "all" },
 
           { name: "vulkan-headers", version: "1.4.341.0", location: "all" },
@@ -37,7 +38,7 @@ jobs:
           { name: "flatbuffers", version: "25.12.19", location: "all" },
 
           { name: "unordered_dense", version: "4.8.1", location: "all" },
-          { name: "mimalloc", version: "3.2.8", location: "all" },
+          { name: "mimalloc", version: "3.3.1", location: "all" },
           { name: "meshoptimizer", version: "1.0", location: "all" },
           { name: "sqlite3", version: "3.51.2", location: "all" },
           { name: "rapidhash", version: "3.0", location: "all" },

ConanProfiles/clang

@@ -17,12 +17,10 @@ tools.meson.mesontoolchain:extra_machine_files+={{profile_dir}}/Toolchains/ipo.i
 tools.system.package_manager:mode=install
 tools.system.package_manager:sudo=True
 
-tools.build:exelinkflags=["-fuse-ld=mold"]
-tools.build:sharedlinkflags=["-fuse-ld=mold"]
-
 tools.build:compiler_executables={"c": "clang", "cpp": "clang++"}
 
-tools.cmake.cmaketoolchain:generator=Ninja
-
 [tool_requires]
-!cmake/*: cmake/[>=4.2]
+!cmake/*: cmake/[>=4.2]
+
+[buildenv]
+CCACHE_NOHASHDIR=1

ConanProfiles/msvc

@@ -17,4 +17,7 @@ tools.build:cflags=["/Zc:preprocessor", "/Zc:__STDC__", "/D_CRT_DECLARE_NONSTDC_
 tools.build:cxxflags=["/Zc:preprocessor", "/permissive-", "/Zc:__cplusplus", "/Zc:enumTypes", "/Zc:templateScope"]
 
 [tool_requires]
-!cmake/*: cmake/[>=4.2]
+!cmake/*: cmake/[>=4.2]
+
+[buildenv]
+CCACHE_NOHASHDIR=1

mimalloc/all/conandata.yml

@@ -1,4 +1,7 @@
 sources:
+  "3.3.1":
+    url: "https://github.com/microsoft/mimalloc/archive/v3.3.1.tar.gz"
+    sha256: "42c16914168ac6741eeb407e83b93a12b2b7ee25a7e14e6b4807fab8b577a540"
   "3.2.8":
     url: "https://github.com/microsoft/mimalloc/archive/v3.2.8.tar.gz"
     sha256: "68163666575518c213a6593850099adce3863b340ca2751103dbd1f253664e05"

mimalloc/config.yml

@@ -1,4 +1,6 @@
 versions:
+  "3.3.1":
+    folder: all
   "3.2.8":
     folder: all
   "3.1.5":

mold/README.md

@@ -0,0 +1,22 @@
+# mold: A Modern Linker
+
+mold is a faster drop-in replacement for existing Unix linkers. It is several
+times quicker than the LLVM lld linker, the second-fastest open-source linker.
+mold aims to enhance developer productivity by minimizing build time, 
+particularly in rapid debug-edit-rebuild cycles.
+
+You can configure Conan to download the latest version of `mold` and use it as the linker 
+when building your dependencies and projects from source. Currently only supported
+when targeting Linux as the platform.
+
+To use mold automatically as the linker, you can add the following section to your
+_host_ profile that targets Linux. When using gcc, please note that the following
+flags require gcc 12.1 or greater.
+
+```
+[tool_requires]
+*:mold/[*]
+[conf]
+tools.build:exelinkflags=['-fuse-ld=mold']
+tools.build:sharedlinkflags=['-fuse-ld=mold']
+```

mold/all/conandata.yml

@@ -0,0 +1,39 @@
+sources:
+  "2.41.0":
+    url: "https://github.com/rui314/mold/archive/refs/tags/v2.41.0.tar.gz"
+    sha256: "0a61abac85d818437b425df856822e9d6e9982baeae5a93bcb02fe6c0060c61a"
+  "2.40.1":
+    url: "https://github.com/rui314/mold/archive/refs/tags/v2.40.1.tar.gz"
+    sha256: "d1ce09a69941f8158604c3edcc96c7178231e7dba2da66b20f5ef6e112c443b7"
+  "2.36.0":
+    url: "https://github.com/rui314/mold/archive/refs/tags/v2.36.0.tar.gz"
+    sha256: "3f57fe75535500ecce7a80fa1ba33675830b7d7deb1e5ee9a737e2bc43cdb1c7"
+  "2.34.1":
+    url: "https://github.com/rui314/mold/archive/refs/tags/v2.34.1.tar.gz"
+    sha256: "a8cf638045b4a4b2697d0bcc77fd96eae93d54d57ad3021bf03b0333a727a59d"
+  "2.33.0":
+    url: "https://github.com/rui314/mold/archive/refs/tags/v2.33.0.tar.gz"
+    sha256: "37b3aacbd9b6accf581b92ba1a98ca418672ae330b78fe56ae542c2dcb10a155"
+  "2.32.1":
+    url: "https://github.com/rui314/mold/archive/refs/tags/v2.32.1.tar.gz"
+    sha256: "f3c9a527d884c635834fe7d79b3de959b00783bf9446280ea274d996f0335825"
+  "2.32.0":
+    url: "https://github.com/rui314/mold/archive/refs/tags/v2.32.0.tar.gz"
+    sha256: "4b7e4146ea0f52be9adae8b417399f3676a041e65b55e3f25f088120d30a320b"
+  "2.31.0":
+    url: "https://github.com/rui314/mold/archive/refs/tags/v2.31.0.tar.gz"
+    sha256: "3dc3af83a5d22a4b29971bfad17261851d426961c665480e2ca294e5c74aa1e5"
+  "2.4.0":
+    url: "https://github.com/rui314/mold/archive/refs/tags/v2.4.0.tar.gz"
+    sha256: "be65f3d785d32ece7b3204ecaa57810847fdd25c232cf704cbfff2dafb1ac107"
+  "2.0.0":
+    url: "https://github.com/rui314/mold/archive/refs/tags/v2.0.0.tar.gz"
+    sha256: "2ae8a22db09cbff626df74c945079fa29c1e5f60bbe02502dcf69191cf43527b"
+  "1.11.0":
+    url: "https://github.com/rui314/mold/archive/refs/tags/v1.11.0.tar.gz"
+    sha256: "99318eced81b09a77e4c657011076cc8ec3d4b6867bd324b8677974545bc4d6f"
+patches:
+  "2.40.1":
+    - patch_file: "patches/2.40.1/0001-patch-enforce-c-11-for-tbb.patch"
+      patch_description: "Fix bundled oneTBB build by enforcing C++11 standard"
+      patch_type: "conan"

mold/all/conanfile.py

@@ -0,0 +1,125 @@
+import os
+from conan import ConanFile
+from conan.tools.build import check_min_cppstd
+from conan.tools.cmake import CMakeToolchain, CMake, cmake_layout, CMakeDeps
+from conan.tools.files import copy, get, rmdir, apply_conandata_patches, export_conandata_patches
+from conan.errors import ConanInvalidConfiguration
+from conan.tools.scm import Version
+from conan.tools.env import VirtualBuildEnv
+
+required_conan_version = ">2.0"
+
+
+class MoldConan(ConanFile):
+    name = "mold"
+    description = (
+        "mold is a faster drop-in replacement for existing Unix linkers. "
+        "It is several times faster than the LLVM lld linker."
+    )
+    license = ("AGPL-3.0", "MIT")
+    url = "https://github.com/conan-io/conan-center-index"
+    homepage = "https://github.com/rui314/mold/"
+    topics = ("ld", "linkage", "compilation", "pre-built")
+
+    package_type = "application"
+    settings = "os", "arch", "compiler", "build_type"
+    options = {
+        "with_mimalloc": [True, False],
+    }
+    default_options = {
+        "with_mimalloc": False,
+    }
+
+    def configure(self):
+        if Version(self.version) < "2.0.0":
+            self.license = "AGPL-3.0"
+        else:
+            self.license = "MIT"
+
+    def layout(self):
+        cmake_layout(self, src_folder="src")
+
+    def requirements(self):
+        self.requires("zlib/[>=1.2.11 <2]")
+        self.requires("xxhash/0.8.2")
+        if self.options.with_mimalloc:
+            self.requires("mimalloc/3.3.1")
+        if Version(self.version) < "2.2.0":
+            # Newer versions use vendored-in BLAKE3
+            self.requires("openssl/[>=1.1 <4]")
+
+    def package_id(self):
+        del self.info.settings.compiler
+
+    def validate_build(self):
+        # perform these checks in validate_build() - since the compiler is removed from the package_id,
+        # this lets the compatibility plugin consider the executable built with other compilers
+        if Version(self.version) >= "2.34.0":
+            # mold has required C+20 since 1.4.1. However, C++20 features are used for the first time in 2.34.0.
+            check_min_cppstd(self, 20)
+        if self.settings.compiler in ["gcc", "clang", "intel-cc"] and self.settings.compiler.libcxx != "libstdc++11":
+            raise ConanInvalidConfiguration('Mold can only be built with libstdc++11; specify mold:compiler.libcxx=libstdc++11 in your build profile')
+        if self.settings.compiler == "msvc":
+            raise ConanInvalidConfiguration(f'{self.name} can not be built on {self.settings.os}.')
+        if self.settings.compiler == "gcc" and Version(self.settings.compiler.version) < "10":
+            raise ConanInvalidConfiguration("GCC version 10 or higher required")
+        if self.settings.compiler in ('clang', 'apple-clang') and Version(self.settings.compiler.version) < "12":
+            raise ConanInvalidConfiguration("Clang version 12 or higher required")
+        if Version(self.version) >= "2.34.0" and self.settings.compiler == "apple-clang" and Version(self.settings.compiler.version) < "14":
+            raise ConanInvalidConfiguration("Apple-Clang version 14 or higher required due to C++20 features")
+        if self.settings.compiler == "apple-clang" and "armv8" == self.settings.arch :
+            raise ConanInvalidConfiguration(f'{self.name} is still not supported by Mac M1.')
+        if Version(self.version) == "2.33.0" and self.settings.compiler == "apple-clang" and Version(self.settings.compiler.version) < "14":
+            raise ConanInvalidConfiguration(f'{self.ref} doesn\'t support Apple-Clang < 14.')
+
+    def build_requirements(self):
+        self.tool_requires("cmake/[>=3.18.0 <4]")
+
+    def export_sources(self):
+        export_conandata_patches(self)
+
+    def source(self):
+        get(self, **self.conan_data["sources"][self.version], strip_root=True)
+        apply_conandata_patches(self)
+
+    def generate(self):
+        tc = CMakeToolchain(self)
+        tc.variables["MOLD_USE_MIMALLOC"] = self.options.with_mimalloc
+        tc.variables["MOLD_USE_SYSTEM_MIMALLOC"] = True
+        tc.variables["MOLD_USE_SYSTEM_TBB"] = False # see https://github.com/conan-io/conan-center-index/pull/23575#issuecomment-2059154281
+        tc.variables["CMAKE_INSTALL_LIBEXECDIR"] = "libexec"
+        tc.generate()
+
+        cd = CMakeDeps(self)
+        cd.generate()
+
+        vbe = VirtualBuildEnv(self)
+        vbe.generate()
+
+    def build(self):
+        cmake = CMake(self)
+        cmake.configure()
+        cmake.build()
+
+    def package(self):
+        cmake = CMake(self)
+        cmake.install()
+        copy(self, "LICENSE", src=self.source_folder, dst=os.path.join(self.package_folder, "licenses"))
+
+        rmdir(self, os.path.join(self.package_folder, "lib", "cmake"))
+        rmdir(self, os.path.join(self.package_folder, "share"))
+
+    def package_info(self):
+        self.cpp_info.includedirs = []
+        self.cpp_info.libdirs = []
+        self.cpp_info.frameworkdirs = []
+        self.cpp_info.resdirs = []
+
+        if self.settings.os in ["Linux", "FreeBSD"]:
+            self.cpp_info.system_libs = ["m", "pthread", "dl"]
+
+        bindir = os.path.join(self.package_folder, "bin")
+        mold_executable = os.path.join(bindir, "mold")
+        self.conf_info.define("user.mold:path", mold_executable)
+        self.buildenv_info.define_path("MOLD_ROOT", bindir)
+        self.buildenv_info.define("LD", mold_executable)

mold/all/patches/2.40.1/0001-patch-enforce-c-11-for-tbb.patch

@@ -0,0 +1,28 @@
+From 2f29fc752620180d88e82792adb2ff8a1d886bd1 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Tim=20Friedrich=20Br=C3=BCggemann?=
+ <tim.brueggemann@dampsoft.de>
+Date: Tue, 17 Jun 2025 09:48:43 +0200
+Subject: [PATCH] patch: Enforce C++11 for TBB
+
+---
+ third-party/tbb/CMakeLists.txt | 4 +---
+ 1 file changed, 1 insertion(+), 3 deletions(-)
+
+diff --git a/third-party/tbb/CMakeLists.txt b/third-party/tbb/CMakeLists.txt
+index 12273b3e..21c4e2ef 100644
+--- a/third-party/tbb/CMakeLists.txt
++++ b/third-party/tbb/CMakeLists.txt
+@@ -77,9 +77,7 @@ include(CMakeDependentOption)
+ # ---------------------------------------------------------------------------------------------------------
+ # Handle C++ standard version.
+ if (NOT MSVC)  # no need to cover MSVC as it uses C++14 by default.
+-    if (NOT CMAKE_CXX_STANDARD)
+-        set(CMAKE_CXX_STANDARD 11)
+-    endif()
++    set(CMAKE_CXX_STANDARD 11)
+ 
+     if (CMAKE_CXX${CMAKE_CXX_STANDARD}_STANDARD_COMPILE_OPTION)  # if standard option was detected by CMake
+         set(CMAKE_CXX_STANDARD_REQUIRED ON)
+-- 
+2.25.1
+

mold/all/test_package/conanfile.py

@@ -0,0 +1,13 @@
+from conan import ConanFile
+from conan.tools.build import can_run
+
+
+class MoldTestConan(ConanFile):
+    settings = "os", "compiler", "build_type", "arch"
+
+    def requirements(self):
+        self.requires(self.tested_reference_str)
+
+    def test(self):
+        if can_run(self):
+            self.run("mold -v", env="conanrun")

mold/config.yml

@@ -0,0 +1,23 @@
+versions:
+  "2.41.0":
+    folder: all
+  "2.40.1":
+    folder: all
+  "2.36.0":
+    folder: all
+  "2.34.1":
+    folder: all
+  "2.33.0":
+    folder: all
+  "2.32.1":
+    folder: all
+  "2.32.0":
+    folder: all
+  "2.31.0":
+    folder: all
+  "2.4.0":
+    folder: all
+  "2.0.0":
+    folder: all
+  "1.11.0":
+    folder: all