llvm: add version 12.0.1

Since we wanted to transfer llvm from bee-files to
pkg-scripts, here is the currently installed version. The
build is almost the same as the bee version with the
exception of the build directory structure.

llvm-12.0.1-0.build.sh

@@ -0,0 +1,60 @@
+#! /bin/bash
+
+PKG=llvm
+VERSION=12.0.1
+BUILD=0
+
+PREFIX=/pkg/$PKG-$VERSION-$BUILD
+if [ -n "$TESTING" ]; then PREFIX=/dev/shm/$PKG-$VERSION-$BUILD ; fi
+
+set -xe
+umask 022
+
+BUILD_TMPDIR=/dev/shm/$PKG-$VERSION-$BUILD.build.tmp
+test -d $BUILD_TMPDIR && ( chmod -R u+rwx $BUILD_TMPDIR || true ; rm -rf $BUILD_TMPDIR )
+mkdir -p $BUILD_TMPDIR/home
+export TMPDIR=$BUILD_TMPDIR
+export HOME=$BUILD_TMPDIR/home
+
+exec </dev/null
+
+mkdir -p $PREFIX
+cat >$PREFIX/profile <<-EOF
+    PATH=$PREFIX/bin:\$PATH
+    if [ -d $PREFIX/.compatlibs ]; then export LD_LIBRARY_PATH=$PREFIX/.compatlibs\${LD_LIBRARY_PATH:+:\$LD_LIBRARY_PATH} ; fi
+EOF
+. $PREFIX/profile
+
+export MAKEFLAGS="-j $(nproc)"
+
+BUILDDIR=$PREFIX/build
+
+mkdir -p $BUILDDIR
+cd $BUILDDIR
+
+test -e llvm-12.0.1.src.tar.xz || wget https://github.com/llvm/llvm-project/releases/download/llvmorg-12.0.1/llvm-12.0.1.src.tar.xz
+test -d llvm-12.0.1            || (mkdir llvm-12.0.1; tar xvf llvm-12.0.1.src.tar.xz -C llvm-12.0.1 --strip-components 1)
+cd llvm-12.0.1
+
+mkdir -p build
+cd build/
+cmake \
+    -DCMAKE_INSTALL_PREFIX=$PREFIX \
+    -DCMAKE_INSTALL_LIBDIR=/usr/lib \
+    -DCMAKE_COLOR_MAKEFILE=OFF \
+    -DCMAKE_VERBOSE_MAKEFILE=ON \
+    -DCMAKE_BUILD_TYPE=Release \
+    -DLLVM_BUILD_LLVM_DYLIB=ON \
+    -DLLVM_LINK_LLVM_DYLIB=ON \
+    -DLLVM_ENABLE_RTTI=ON \
+    -DLLVM_TARGETS_TO_BUILD="X86;AMDGPU;BPF" \
+    -DLLVM_BUILD_TESTS=ON \
+    -DLLVM_INSTALL_UTILS=ON \
+    -Wno-dev \
+    -G Ninja \
+    ..
+
+ninja -v -C .
+ninja -v -C . install
+
+exit