feat: add LLVM+Clang+LLD toolchain

.kres.yaml

@@ -3,6 +3,7 @@ kind: pkgfile.Build
 spec:
   targets:
     - tools
+    - llvm
     - tools-ca-certificates
     - tools-cpio
     - tools-kmod
@@ -17,7 +18,7 @@ spec:
     - tools-xz
     - tools-zlib-ng
     - tools-zstd
-  reproducibleTargetName: tools
+  reproducibleTargetName: reproducibility
 ---
 kind: common.Renovate
 spec:

Makefile

@@ -1,6 +1,6 @@
 # THIS FILE WAS AUTOMATICALLY GENERATED, PLEASE DO NOT EDIT.
 #
-# Generated on 2026-01-02T09:24:08Z by kres 8a4aebf.
+# Generated on 2026-02-05T16:48:34Z by kres dc032d7.
 
 # common variables
 
@@ -48,6 +48,7 @@ COMMON_ARGS += $(BUILD_ARGS)
 # targets defines all the available targets
 
 TARGETS = tools
+TARGETS += llvm
 TARGETS += tools-ca-certificates
 TARGETS += tools-cpio
 TARGETS += tools-kmod
@@ -136,7 +137,7 @@ docker-%:  ## Builds the specified target defined in the Pkgfile using the docke
 	@$(MAKE) target-$* TARGET_ARGS="$(TARGET_ARGS)"
 
 reproducibility-test:  ## Builds the reproducibility test target
-	@$(MAKE) reproducibility-test-local-tools
+	@$(MAKE) reproducibility-test-local-reproducibility
 
 reproducibility-test-local-%:  ## Builds the specified target defined in the Pkgfile using the local output type with and without cahce. The build result will be output to the specified local destination
 	@rm -rf $(ARTIFACTS)/build-a $(ARTIFACTS)/build-b

Pkgfile

@@ -192,6 +192,21 @@ vars:
   libuv_sha256: 27e55cf7083913bfb6826ca78cde9de7647cded648d35f24163f2d31bb9f51cd
   libuv_sha512: cf3ca916fc3a762a194dac86718a5a7fe24f230e34172a48f9b3401ad72fbc1cf21b46ceaba956cdf6783d323e518d40f8632fff965943869819a1c26992a3c1
 
+  # renovate: datasource=github-releases extractVersion=^llvmorg-(?<version>.*)$ depName=llvm/llvm-project
+  llvm_version: 21.1.8
+  llvm_clang_sha256: 6090e3f23720d003cdd84483a47d0eec6d01adbb5e0c714ac0c8b58de546aa62
+  llvm_clang_sha512: 46e8bd1179540d6915ee8a722b344954200c120b9feaa9199cb70cecf358cdc27f2b5e66122894f894b1766894abd774cebd4e4313951c96032aa351bfcc7028
+  llvm_cmake_sha256: 85735f20fd8c81ecb0a09abb0c267018475420e93b65050cc5b7634eab744de9
+  llvm_cmake_sha512: 7b2a8c1792f0f2c2efb9f5813bc6acd287e782eac0438e9303791f7ceefe75fb6a49c55ea2e1a3d741b2ee935023f9273c79f9d7321250b5e659d14a05ef9e63
+  llvm_libunwind_sha256: 03e8adc6c3bdde657dcaedc94886ea70d1f7d551d622fcd8a36a8300e5c36cbc
+  llvm_libunwind_sha512: 3b78895de448a3af6d5e0d066b83ec7e4c3d4bf04fbd0c1ac378cc889b0b511ccf9c09394e8eb75d1ada88968bdf0ef1ae2d933b145bc9ea56a7e967fdf13b23
+  llvm_lld_sha256: d9524c5ee952500a2af92c27042a0d90ab089962af47816d4c85d0ebf76373d1
+  llvm_lld_sha512: 8d7a01d6e511e0da38a2e0a40a46ca6ef26f31e924349e7fe510413d1b42c9372346310660e7ae7ed733a689e2404d8d43ccb94f4107484cb7675f721e885269
+  llvm_sha256: d9022ddadb40a15015f6b27e6549a7144704ded8828ba036ffe4b8165707de21
+  llvm_sha512: f7a4887ece318939c5ac00f6dfe9f5ce4c080395f1409eaba3c65d48927e248c13648b0fc11661cc9f55fe40b3f84df5b4a3b08bd8d82b37a2ea5abb729a021f
+  llvm_third_party_sha256: 7fe99424384aea529ffaeec9cc9dfb8b451fd1852c03fc109e426fe208a1f1a7
+  llvm_third_party_sha512: 0b36b1683bac537cc54daba11a4d5fdd5ef144775f39354059a5ebc100cdc305b12b816334713e0ac6842f24e9c413680d071374cb0cf26cb4776305f6a0f8bf
+
   # renovate: datasource=git-tags extractVersion=^v(?<version>.*)$ depName=git://git.savannah.gnu.org/m4.git
   m4_version: 1.4.21
   m4_sha256: f25c6ab51548a73a75558742fb031e0625d6485fe5f9155949d6486a2408ab66

llvm/patches/fix-memory-mf_exec-on-aarch64.patch

@@ -0,0 +1,29 @@
+Imported from Alpine: https://gitlab.alpinelinux.org/alpine/aports/-/blob/9e8202998fa718a7be6fb2d8aba639f97a94bb6a/main/llvm21/fix-memory-mf_exec-on-aarch64.patch
+
+Fix failures in AllocationTests/MappedMemoryTest.* on aarch64:
+
+    Failing Tests (8):
+        LLVM-Unit :: Support/./SupportTests/AllocationTests/MappedMemoryTest.AllocAndRelease/3
+        LLVM-Unit :: Support/./SupportTests/AllocationTests/MappedMemoryTest.DuplicateNear/3
+        LLVM-Unit :: Support/./SupportTests/AllocationTests/MappedMemoryTest.EnabledWrite/3
+        LLVM-Unit :: Support/./SupportTests/AllocationTests/MappedMemoryTest.MultipleAllocAndRelease/3
+        LLVM-Unit :: Support/./SupportTests/AllocationTests/MappedMemoryTest.SuccessiveNear/3
+        LLVM-Unit :: Support/./SupportTests/AllocationTests/MappedMemoryTest.UnalignedNear/3
+        LLVM-Unit :: Support/./SupportTests/AllocationTests/MappedMemoryTest.ZeroNear/3
+        LLVM-Unit :: Support/./SupportTests/AllocationTests/MappedMemoryTest.ZeroSizeNear/3
+
+Upstream-Issue: https://bugs.llvm.org/show_bug.cgi?id=14278#c10
+
+diff --git a/llvm/lib/Support/Unix/Memory.inc b/llvm/lib/Support/Unix/Memory.inc
+index 4c8f6b2ea..6cddae13b 100644
+--- a/llvm/lib/Support/Unix/Memory.inc
++++ b/llvm/lib/Support/Unix/Memory.inc
+@@ -50,7 +50,7 @@ static int getPosixProtectionFlags(unsigned Flags) {
+       llvm::sys::Memory::MF_EXEC:
+     return PROT_READ | PROT_WRITE | PROT_EXEC;
+   case llvm::sys::Memory::MF_EXEC:
+-#if defined(__FreeBSD__) || defined(__powerpc__)
++#if defined(__FreeBSD__) || defined(__powerpc__) || (defined(__linux__) && defined(__aarch64__))
+     // On PowerPC, having an executable page that has no read permission
+     // can have unintended consequences.  The function InvalidateInstruction-
+     // Cache uses instructions dcbf and icbi, both of which are treated by

llvm/patches/llvm-stack-size.patch

@@ -0,0 +1,25 @@
+Imported from Alpine: https://gitlab.alpinelinux.org/alpine/aports/-/blob/9e8202998fa718a7be6fb2d8aba639f97a94bb6a/main/llvm21/llvm-stack-size.patch
+
+Patch-Source: https://github.com/chimera-linux/cports/blob/8c0359f31b9d888e59ced0320e93ca8ad79ba1f9/main/llvm/patches/0010-always-set-a-larger-stack-size-explicitly.patch
+From 18e09846d9333b554e3dfbbd768ada6643bf92c0 Mon Sep 17 00:00:00 2001
+From: Daniel Kolesa <daniel@octaforge.org>
+Date: Sat, 27 Nov 2021 01:03:28 +0100
+Subject: [PATCH 10/22] always set a larger stack size explicitly
+
+---
+ llvm/lib/Support/Threading.cpp | 9 ---------
+ 1 file changed, 9 deletions(-)
+
+diff --git a/llvm/lib/Support/Threading.cpp b/llvm/lib/Support/Threading.cpp
+index 923935bbc..26594aac8 100644
+--- a/llvm/lib/Support/Threading.cpp
++++ b/llvm/lib/Support/Threading.cpp
+@@ -77,7 +77,7 @@ unsigned llvm::ThreadPoolStrategy::compute_thread_count() const {
+ // keyword.
+ #include "llvm/Support/thread.h"
+
+-#if defined(__APPLE__)
++#if 1
+   // Darwin's default stack size for threads except the main one is only 512KB,
+   // which is not enough for some/many normal LLVM compilations. This implements
+   // the same interface as std::thread but requests the same stack size as the

llvm/pkg.yaml

@@ -0,0 +1,90 @@
+name: llvm
+variant: scratch
+dependencies:
+  - stage: base
+  - stage: patch
+  - stage: cmake
+  - stage: curl
+  - stage: ninja
+  - stage: python3
+steps:
+  - sources:
+      - url: https://github.com/llvm/llvm-project/releases/download/llvmorg-{{ .llvm_version }}/llvm-{{ .llvm_version }}.src.tar.xz
+        destination: llvm.tar.xz
+        sha256: "{{ .llvm_sha256 }}"
+        sha512: "{{ .llvm_sha512 }}"
+      - url: https://github.com/llvm/llvm-project/releases/download/llvmorg-{{ .llvm_version }}/cmake-{{ .llvm_version }}.src.tar.xz
+        destination: cmake.tar.xz
+        sha256: "{{ .llvm_cmake_sha256 }}"
+        sha512: "{{ .llvm_cmake_sha512 }}"
+      - url: https://github.com/llvm/llvm-project/releases/download/llvmorg-{{ .llvm_version }}/third-party-{{ .llvm_version }}.src.tar.xz
+        destination: third-party.tar.xz
+        sha256: "{{ .llvm_third_party_sha256 }}"
+        sha512: "{{ .llvm_third_party_sha512 }}"
+      - url: https://github.com/llvm/llvm-project/releases/download/llvmorg-{{ .llvm_version }}/clang-{{ .llvm_version }}.src.tar.xz
+        destination: clang.tar.xz
+        sha256: "{{ .llvm_clang_sha256 }}"
+        sha512: "{{ .llvm_clang_sha512 }}"
+      - url: https://github.com/llvm/llvm-project/releases/download/llvmorg-{{ .llvm_version }}/lld-{{ .llvm_version }}.src.tar.xz
+        destination: lld.tar.xz
+        sha256: "{{ .llvm_lld_sha256 }}"
+        sha512: "{{ .llvm_lld_sha512 }}"
+      - url: https://github.com/llvm/llvm-project/releases/download/llvmorg-{{ .llvm_version }}/libunwind-{{ .llvm_version }}.src.tar.xz
+        destination: libunwind.tar.xz
+        sha256: "{{ .llvm_libunwind_sha256 }}"
+        sha512: "{{ .llvm_libunwind_sha512 }}"
+    prepare:
+      - |
+        mkdir llvm
+        tar -xJf llvm.tar.xz --strip-components=1 -C llvm
+        mkdir cmake
+        tar -xJf cmake.tar.xz --strip-components=1 -C cmake
+        mkdir third-party
+        tar -xJf third-party.tar.xz --strip-components=1 -C third-party
+        mkdir clang
+        tar -xJf clang.tar.xz --strip-components=1 -C clang
+        mkdir lld
+        tar -xJf lld.tar.xz --strip-components=1 -C lld
+        mkdir libunwind
+        tar -xJf libunwind.tar.xz --strip-components=1 -C libunwind
+
+        patch -p1 < /pkg/patches/fix-memory-mf_exec-on-aarch64.patch
+        patch -p1 < /pkg/patches/llvm-stack-size.patch
+      - |
+        cmake -S llvm -B build -G Ninja \
+              -DCMAKE_BUILD_TYPE=Release \
+              -DCMAKE_INSTALL_PREFIX=/usr \
+              -DLLVM_DEFAULT_TARGET_TRIPLE="${ARCH}-linux-musl" \
+              -DLLVM_HOST_TRIPLE="${ARCH}-linux-musl" \
+              -DLLVM_ENABLE_PROJECTS="clang;lld" \
+              -DLLVM_BUILD_LLVM_DYLIB=ON \
+              -DLLVM_LINK_LLVM_DYLIB=ON \
+              -DLLVM_INCLUDE_TESTS=OFF \
+              -DLLVM_INCLUDE_DOCS=OFF \
+              -DLLVM_INCLUDE_EXAMPLES=OFF \
+              -DLLVM_INCLUDE_BENCHMARKS=OFF \
+              -DLLVM_ENABLE_BINDINGS=OFF \
+              -DLLVM_INSTALL_UTILS=ON \
+              -DLLVM_TARGETS_TO_BUILD='ARM;AArch64;X86' \
+              -DLLVM_ENABLE_ASSERTIONS=OFF \
+              -DLLVM_ENABLE_LTO=ON
+    build:
+      - |
+        cmake --build build
+    install:
+      - |
+        DESTDIR=/rootfs cmake --install build
+        # remove LLVM development files
+        rm -rf /rootfs/usr/include /rootfs/usr/lib/cmake /rootfs/usr/lib/*.a
+    test:
+      - |
+        # Validate usrmerge symlinks from toolchain did not get overwritten
+        [ -L /bin ] && [ -d /bin ]
+        [ -L /lib ] && [ -d /lib ]
+        [ -L /lib64 ] && [ -d /lib64 ]
+        [ -L /usr/lib64 ] && [ -d /usr/lib64 ]
+        [ -L /sbin ] && [ -d /sbin ]
+        [ -L /usr/sbin ] && [ -d /usr/sbin ]
+finalize:
+  - from: /rootfs
+    to: /

reproducibility/pkg.yaml

@@ -0,0 +1,18 @@
+name: reproducibility
+variant: scratch
+dependencies:
+  - stage: tools
+  - stage: llvm
+steps:
+  - test:
+    - |
+      # Validate usrmerge symlinks from toolchain did not get overwritten
+      [ -L /bin ] && [ -d /bin ]
+      [ -L /lib ] && [ -d /lib ]
+      [ -L /lib64 ] && [ -d /lib64 ]
+      [ -L /usr/lib64 ] && [ -d /usr/lib64 ]
+      [ -L /sbin ] && [ -d /sbin ]
+      [ -L /usr/sbin ] && [ -d /usr/sbin ]
+finalize:
+  - from: /
+    to: /