From ca6df9ce767019c839521516a003917bd9bc8b23 Mon Sep 17 00:00:00 2001
From: Yingjie Wang <phywyj@gmail.com>
Date: Thu, 25 Dec 2025 23:19:42 -0500
Subject: [PATCH] new blfs: llvm-core/clang-20.1.8

---
 README.md                       |   2 +-
 llvm-core/clang-20.1.8.PKGBUILD | 142 ++++++++++++++++++++++++++++++++
 2 files changed, 143 insertions(+), 1 deletion(-)
 create mode 100644 llvm-core/clang-20.1.8.PKGBUILD

diff --git a/README.md b/README.md
index de340cf..e68a2ac 100644
--- a/README.md
+++ b/README.md
@@ -31,4 +31,4 @@ dev-libs/libunistring dev-libs/popt dev-libs/libtasn1 app-arch/libarchive dev-li
 - `dev-python/six` -> `dev-debug/gdb`
 - `dev-libs/popt` + `dev-libs/xxhash` -> `net-misc/rsync`
 - `dev-libs/pcre2` -> rebuild `sys-apps/grep`
-- rebuild `sys-apps/grep` + `net-misc/curl` + `dev-build/cmake` -> `llvm-core/llvm` -> `llvm-runtimes/compiler-rt`
+- rebuild `sys-apps/grep` + `net-misc/curl` + `dev-build/cmake` -> `llvm-core/llvm` -> `llvm-runtimes/compiler-rt` -> `llvm-core/clang`
diff --git a/llvm-core/clang-20.1.8.PKGBUILD b/llvm-core/clang-20.1.8.PKGBUILD
new file mode 100644
index 0000000..cb0e9a5
--- /dev/null
+++ b/llvm-core/clang-20.1.8.PKGBUILD
@@ -0,0 +1,142 @@
+pkgname=clang
+pkgver=20.1.8
+pkgdesc="C language family frontend for LLVM"
+arch=('x86_64')
+homepage="https://clang.llvm.org/"
+license=('Apache-2.0 WITH LLVM-exception')
+_source_base=https://github.com/llvm/llvm-project/releases/download/llvmorg-$pkgver
+_blfs_source_base="https://anduin.linuxfromscratch.org/BLFS/llvm/"
+sources=("clang-$pkgver.src.tar.xz"
+  "clang-tools-extra-$pkgver.src.tar.xz"
+  "llvm-${pkgver}.src.tar.xz"
+  "llvm-cmake-${pkgver}.src.tar.xz"
+  "llvm-third-party-${pkgver}.src.tar.xz"
+)
+urls=("${_source_base}/${sources[0]}"
+  "${_source_base}/${sources[1]}"
+  "${_blfs_source_base}/${sources[2]}"
+  "${_blfs_source_base}/${sources[3]}"
+  "${_blfs_source_base}/${sources[4]}"
+)
+md5sums=("62a0500bb932868061607cde0c01f584"
+  "254c99f104cd17b32ef721acaeb58a7c"
+  "78040509eb91309b4ec2edfe12cd20d8"
+  "5bfb8f4b4a2b3ccffca0d2406e4cdcc6"
+  "2ffd8624b3cbddf55a4e74a7d8ea89fa"
+)
+
+src_prepare() {
+  tar -xf ${distdir}/${sources[0]} &&
+  tar -xf ${distdir}/${sources[1]} &&
+  tar -xf ${distdir}/${sources[2]} &&
+  tar -xf ${distdir}/${sources[3]} &&
+  tar -xf ${distdir}/${sources[4]} &&
+  rename -v -- "-$pkgver.src" '' {cmake,clang-tools-extra}-$pkgver.src
+  cd clang-$pkgver.src
+  mkdir build
+  cd ..
+}
+
+# Utilizing LLVM_DISTRIBUTION_COMPONENTS to avoid
+# installing static libraries; inspired by Gentoo
+_get_distribution_components() {
+  local target
+  ninja -t targets | grep -Po 'install-\K.*(?=-stripped:)' | while read -r target; do
+    case $target in
+      clang-libraries|distribution)
+        continue
+        ;;
+      clang|clangd|clang-*)
+        ;;
+      clang*|findAllSymbols)
+        continue
+        ;;
+    esac
+    echo $target
+  done
+}
+
+src_build() {
+  pushd clang-$pkgver.src/build
+
+  # Build only minimal debug info to reduce size
+  CFLAGS=${CFLAGS/-g /-g1 }
+  CXXFLAGS=${CXXFLAGS/-g /-g1 }
+
+  local cmake_args=(
+    -G Ninja
+    -DCMAKE_BUILD_TYPE=Release
+    -DCMAKE_INSTALL_PREFIX=/usr
+    -DCMAKE_INSTALL_DOCDIR=share/doc
+    -DCMAKE_SKIP_RPATH=ON
+    -DCLANG_DEFAULT_PIE_ON_LINUX=ON
+    -DCLANG_LINK_CLANG_DYLIB=ON
+    -DENABLE_LINKER_BUILD_ID=ON
+    -DLLVM_BUILD_TESTS=ON
+    -DLLVM_ENABLE_RTTI=ON
+    -DLLVM_ENABLE_SPHINX=OFF
+    -DLLVM_EXTERNAL_CLANG_TOOLS_EXTRA_SOURCE_DIR="$srcdir/clang-tools-extra"
+    -DLLVM_EXTERNAL_LIT=/usr/bin/lit
+    -DLLVM_LINK_LLVM_DYLIB=ON
+    -DLLVM_THIRD_PARTY_DIR="$srcdir/third-party-$pkgver.src"
+  )
+
+  cmake .. "${cmake_args[@]}"
+  local distribution_components=$(_get_distribution_components | paste -sd\;)
+  test -n "$distribution_components"
+  cmake_args+=(-DLLVM_DISTRIBUTION_COMPONENTS="$distribution_components")
+
+  cmake .. "${cmake_args[@]}" &&
+  ninja &&
+  popd
+}
+
+src_check() {
+  pushd clang-$pkgver.src/build
+  LD_LIBRARY_PATH=$PWD/lib ninja check-clang{,-tools}
+  popd
+}
+
+_python_optimize() {
+  python -m compileall "$@"
+  python -O -m compileall "$@"
+  python -OO -m compileall "$@"
+}
+
+src_install() {
+  pushd clang-$pkgver.src/build
+
+  DESTDIR="$pkgdir" ninja install-distribution
+  install -Dm644 ../LICENSE.TXT "$pkgdir/usr/share/licenses/$pkgname/LICENSE"
+
+  mkdir -pv ${pkgdir}/etc/clang &&
+  for i in clang clang++; do
+    echo -fstack-protector-strong > ${pkgdir}/etc/clang/$i.cfg
+  done
+
+  # Remove documentation sources
+  rm -r "$pkgdir"/usr/share/doc/clang{,-tools}/html/{_sources,.buildinfo} || true
+
+  # Move scanbuild-py into site-packages and install Python bindings
+  local site_packages=$(python -c "import site; print(site.getsitepackages()[0])")
+  install -d "$pkgdir/$site_packages"
+  mv "$pkgdir"/usr/lib/{libear,libscanbuild} "$pkgdir/$site_packages/"
+  cp -a ../bindings/python/clang "$pkgdir/$site_packages/"
+
+  # Move analyzer scripts out of /usr/libexec
+  mv "$pkgdir"/usr/libexec/* "$pkgdir/usr/lib/clang/"
+  rmdir "$pkgdir/usr/libexec"
+  sed -i 's|libexec|lib/clang|' \
+    "$pkgdir/usr/bin/scan-build" \
+    "$pkgdir/$site_packages/libscanbuild/analyze.py"
+
+  # Compile Python scripts
+  _python_optimize "$pkgdir/usr/share" "$pkgdir/$site_packages"
+
+  # Move bash completion
+  local bash_completion_destdir="$pkgdir/usr/share/bash-completion/completions"
+  install -d $bash_completion_destdir
+  mv "$pkgdir/usr/share/clang/bash-autocomplete.sh" "$bash_completion_destdir/clang"
+
+  popd
+}