%global _trivial .0
%global _buildid .0
# spec file for llvm20--bootstrap
#
# This spec file is for building a minimal, namespaced version of LLVM 19.
# The purpose of this package is to be the first stage of a two-stage
# bootstrap build process. It is used to compile the intermediate
# llvm19-bootstrap2 package.

Name:       llvm
Version:    20.1.8
Release:    1%{dist}%{?_trivial}%{?_buildid}
Summary:    The LLVM Compiler Infrastructure, minimal namespaced bootstrap version
License:    Apache-2.0 AND NCSA
URL:        https://llvm.org/
Source0:    https://github.com/llvm/llvm-project/releases/download/llvmorg-20.1.8/llvm-project-20.1.8.src.tar.xz
Source1:    https://github.com/llvm/llvm-project/releases/download/llvmorg-20.1.8/llvm-project-20.1.8.src.tar.xz.sig

# Amazon Patches
Patch1000:  0001-add-amazon-triplets-as-recognized-clang-toolchain-in.patch

BuildRequires:  cmake
BuildRequires:  gcc14
BuildRequires:  gcc14-c++
BuildRequires:  ninja-build
BuildRequires:  zlib-devel
BuildRequires:  libxml2-devel
BuildRequires:  python3-devel
BuildRequires:  openssl-devel
BuildRequires:  gmp-devel
BuildRequires:  libtool
BuildRequires:  binutils-devel
# We explicitly list the llvm18 packages as a build dependency.
BuildRequires:  clang19
BuildRequires:  lld19
BuildRequires:  llvm19
BuildRequires:  compiler-rt19
%global toolchain clang

Requires:       zlib
Requires:       libxml2
Requires:       gcc14 gcc14-c++


# Disable all debug package generation as this is a minimal bootstrap package.
%global debug_package %{nil}
%define debuginfo %{nil}
%define __strip %{nil}
# Allow installed but not packaged files, which is useful for a bootstrap build.
%define _unpackaged_files_terminate_build 0

%description
This package contains a minimal bootstrap build of the LLVM 19 compiler
infrastructure. It is intentionally small, providing just the necessary
components to build a more complete, intermediate bootstrap package.

%prep
%autosetup -p1 -n llvm-project-20.1.8.src


%build
export CFLAGS="$(echo %{optflags} | sed -e 's|fno-openmp-implicit-rpath||g')"
export CXXFLAGS="$(echo %{optflags} | sed -e 's|fno-openmp-implicit-rpath||g')"
export LDFLAGS="$(echo %{optflags} | sed -e 's|fno-openmp-implicit-rpath||g')"
export CC=clang-19
export CXX=clang++-19
export LD=lld-19
%cmake -S llvm -G Ninja \
  -DCMAKE_BUILD_TYPE=Release \
  -DCMAKE_C_FLAGS="${CFLAGS}" \
  -DCMAKE_CXX_FLAGS="${CXXFLAGS}" \
  -DCMAKE_INSTALL_PREFIX=%{_libdir}/llvm \
  -DLLVM_ENABLE_PROJECTS="clang;lld" \
  -DLLVM_BUILD_TESTS=OFF \
  -DLLVM_BUILD_DOCS=OFF \
  -DLLVM_TOOL_LLD_BUILD=ON \
  -DLLVM_TOOL_CLANG_BUILD=ON \
  -DCMAKE_C_COMPILER=%{_libdir}/llvm19/bin/clang \
  -DCMAKE_CXX_COMPILER=%{_libdir}/llvm19/bin/clang++ \
  -DCLANG_DEFAULT_C_STDLIB=glibc \
  -DCLANG_DEFAULT_CXX_STDLIB=libstdc++ \
  -DLLVM_LINK_LLVM_DYLIB=ON \
  -DBUILD_SHARED_LIBS=OFF \
  -DLLVM_ENABLE_LTO=OFF \
  -DLLVM_TOOL_LLVM_GOLD_BUILD=OFF \
  -DCMAKE_C_COMPILER_TARGET="%{_arch}-amazon-linux" \
  -DCMAKE_CXX_COMPILER_TARGET="%{_arch}-amazon-linux" \
  -DCLANG_DEFAULT_C_STDLIB=glibc \
  -DCLANG_DEFAULT_CXX_STDLIB=libstdc++ \
  -DCLANG_DEFAULT_LINKER=lld

%cmake_build

%install
# Perform the install using the new versioned prefix.
%cmake_install

# Fix ambiguous python and perl shebangs.
find %{buildroot}%{_libdir}/llvm -type f -exec sed -i -e '1s|#!/usr/bin/env python$|#!/usr/bin/python3|' \
  -e '1s|#!/usr/bin/env python3$|#!/usr/bin/python3|' \
  -e '1s|#!/usr/bin/env perl$|#!/usr/bin/perl|' {} +

# Create symlinks to the core tools in %{_bindir}
# Use absolute paths to prevent broken links on 64-bit systems.
install -d %{buildroot}%{_bindir}
ln -sf %{_libdir}/llvm/bin/clang %{buildroot}%{_bindir}/clang
ln -sf %{_libdir}/llvm/bin/clang %{buildroot}%{_bindir}/clang++
ln -sf %{_libdir}/llvm/bin/lld %{buildroot}%{_bindir}/lld
ln -sf %{_libdir}/llvm/bin/lld %{buildroot}%{_bindir}/ld.lld
ln -sf %{_libdir}/llvm/bin/llvm-ar %{buildroot}%{_bindir}/llvm-ar
ln -sf %{_libdir}/llvm/bin/llvm-nm %{buildroot}%{_bindir}/llvm-nm
ln -sf %{_libdir}/llvm/bin/llvm-objdump %{buildroot}%{_bindir}/llvm-objdump
ln -sf %{_libdir}/llvm/bin/llvm-readelf %{buildroot}%{_bindir}/llvm-readelf
ln -sf %{_libdir}/llvm/bin/llvm-strip %{buildroot}%{_bindir}/llvm-strip

# Copy the license file to the correct location
install -d %{buildroot}%{_defaultlicensedir}/%{name}
install -m 644 LICENSE.TXT %{buildroot}%{_defaultlicensedir}/%{name}/LICENSE.TXT

%files
%license %{_defaultlicensedir}/%{name}/LICENSE.TXT
%{_bindir}/*
%dir %{_libdir}/llvm/
%{_libdir}/llvm/bin/*
%{_libdir}/llvm/lib/*
%{_libdir}/llvm/libexec/*
%{_libdir}/llvm/include/*
%{_libdir}/llvm/share/*
%{_libdir}/llvm/lib/cmake/*

%changelog
* Thu Aug 07 2025 Yonghang Wang <wyhang@gmail.com> - 20.1.8-1
- Initial bootstrap package for LLVM 20, namespaced.