From efd75d3a55b102d95bdacabae603bf21a99b7223 Mon Sep 17 00:00:00 2001
From: Yingjie Wang <phywyj@gmail.com>
Date: Thu, 25 Dec 2025 19:01:55 -0500
Subject: [PATCH] new blfs: llvm-core/llvm-20.1.8

---
 README.md                      |   3 +-
 llvm-core/llvm-20.1.8.PKGBUILD | 121 +++++++++++++++++++++++++++++++++
 2 files changed, 123 insertions(+), 1 deletion(-)
 create mode 100644 llvm-core/llvm-20.1.8.PKGBUILD

diff --git a/README.md b/README.md
index 187ebed..277fa44 100644
--- a/README.md
+++ b/README.md
@@ -30,4 +30,5 @@ dev-libs/libunistring dev-libs/popt dev-libs/libtasn1 app-arch/libarchive dev-li
 - `app-arch/libarchive` -> `dev-db/sqlite` -> rebuild `dev-lang/python`
 - `dev-python/six` -> `dev-debug/gdb`
 - `dev-libs/popt` + `dev-libs/xxhash` -> `net-misc/rsync`
-- `dev-libs/pcre2` -> `sys-apps/grep`
+- `dev-libs/pcre2` -> rebuild `sys-apps/grep`
+- rebuild `sys-apps/grep` + `net-misc/curl` + `dev-build/cmake` -> `llvm-core/llvm`
diff --git a/llvm-core/llvm-20.1.8.PKGBUILD b/llvm-core/llvm-20.1.8.PKGBUILD
new file mode 100644
index 0000000..c63ab19
--- /dev/null
+++ b/llvm-core/llvm-20.1.8.PKGBUILD
@@ -0,0 +1,121 @@
+pkgname=llvm
+pkgver=20.1.8
+arch=('x86_64')
+url="https://llvm.org/"
+license=('Apache-2.0 WITH LLVM-exception')
+_source_base=https://github.com/llvm/llvm-project/releases/download/llvmorg-$pkgver
+sources=("${pkgname}-${pkgver}.src.tar.xz"
+  "llvm-cmake-${pkgver}.src.tar.xz"
+  "llvm-third-party-${pkgver}.src.tar.xz"
+)
+urls=("${_source_base}/llvm-${pkgver}.src.tar.xz"
+  "https://anduin.linuxfromscratch.org/BLFS/llvm/llvm-cmake-${pkgver}.src.tar.xz"
+  "https://anduin.linuxfromscratch.org/BLFS/llvm/llvm-third-party-${pkgver}.src.tar.xz"
+)
+md5sums=("78040509eb91309b4ec2edfe12cd20d8"
+  "5bfb8f4b4a2b3ccffca0d2406e4cdcc6"
+  "2ffd8624b3cbddf55a4e74a7d8ea89fa"
+)
+
+src_prepare() {
+  tar -xf ${distdir}/${sources[0]} --strip-components=1 &&
+  tar -xf ${distdir}/${sources[1]} &&
+  tar -xf ${distdir}/${sources[2]} &&
+  sed "/LLVM_COMMON_CMAKE_UTILS/s@../cmake@cmake-${pkgver}.src@"          \
+      -i CMakeLists.txt                                                  &&
+  sed "/LLVM_THIRD_PARTY_DIR/s@../third-party@third-party-${pkgver}.src@" \
+      -i cmake/modules/HandleLLVMOptions.cmake                           &&
+  sed 's/utility/tool/' -i utils/FileCheck/CMakeLists.txt
+}
+
+# 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
+      llvm-libraries|distribution)
+        continue
+        ;;
+      # shared libraries
+      LLVM|LLVMgold)
+        ;;
+      # libraries needed for clang-tblgen
+      LLVMDemangle|LLVMSupport|LLVMTableGen)
+        ;;
+      # used by lldb
+      LLVMDebuginfod)
+        ;;
+      # testing libraries
+      LLVMTestingAnnotations|LLVMTestingSupport)
+        ;;
+      # exclude static libraries
+      LLVM*)
+        continue
+        ;;
+      # exclude llvm-exegesis (doesn't seem useful without libpfm)
+      llvm-exegesis)
+        continue
+        ;;
+    esac
+    echo $target
+  done
+}
+
+src_build() {
+  mkdir -v build &&
+  cd       build &&
+
+  # Build only minimal debug info to reduce size
+  CFLAGS=${CFLAGS/-g /-g1 }
+  CXXFLAGS=${CXXFLAGS/-g /-g1 }
+
+  local cmake_args=(
+    -D CMAKE_INSTALL_PREFIX=/usr
+    -D CMAKE_SKIP_INSTALL_RPATH=ON
+    -D LLVM_ENABLE_FFI=ON
+    -D LLVM_USE_PERF=ON
+    -D CMAKE_BUILD_TYPE=Release
+    -D LLVM_BUILD_LLVM_DYLIB=ON
+    -D LLVM_LINK_LLVM_DYLIB=ON
+    -D LLVM_ENABLE_RTTI=ON
+    -D LLVM_ENABLE_SPHINX=OFF
+    -D LLVM_TARGETS_TO_BUILD="host;AMDGPU"
+    -D LLVM_BINUTILS_INCDIR=/usr/include
+    -D LLVM_INCLUDE_BENCHMARKS=OFF
+    -W no-dev
+    -G Ninja
+  )
+
+  CC=gcc CXX=g++ cmake .. "${cmake_args[@]}"    &&
+  local distribution_components=$(_get_distribution_components | paste -sd\;) &&
+  test -n "$distribution_components" &&
+  cmake_args+=(-DLLVM_DISTRIBUTION_COMPONENTS="$distribution_components") &&
+
+  CC=gcc CXX=g++ cmake .. "${cmake_args[@]}" &&
+
+  ninja &&
+  cd .. &&
+
+  pushd utils/lit &&
+  pip3 wheel -w dist --no-build-isolation --no-deps $PWD &&
+  popd
+}
+
+src_check() {
+  pushd build &&
+  ninja check-llvm &&
+  popd
+}
+
+src_install() {
+  pushd build &&
+  DESTDIR="$pkgdir" ninja install-distribution &&
+  pushd ../utils/lit &&
+  pip3 install --no-deps --no-warn-script-location --no-index --find-links dist --no-cache-dir --no-user --root $pkgdir lit &&
+  popd &&
+  # Remove documentation sources
+  rm -r "$pkgdir"/usr/share/doc/llvm/html/{_sources,.buildinfo} || true &&
+  install -Dm644 ../LICENSE.TXT "$pkgdir/usr/share/licenses/$pkgname/LICENSE" &&
+  popd
+}