File lld.spec of Package lld

%define realname lld
%define realver  17.0.1
%define srcext   tar.xz

%bcond_without ninja

%define gen     %(awk -F. '{print $1}' <<< %{realver})
%define mainver %(awk -F. '{printf "%i.%i", $1, $2}' <<< %{realver})

# turn off the generation of debuginfo rpm  (RH9) ??
%global debug_package %{nil}

# Common info
Name:          %{realname}
Version:       %{realver}
Release:       wiz%{?extraver:0.}1%{?dist}
License:       BSD-3-Clause
Group:         Development/Tools/Building
URL:           http://lld.llvm.org/
Summary:       The LLVM Linker

# Install-time parameters
Requires:      /usr/sbin/update-alternatives

# Build-time parameters
BuildRequires: xz pkg-config cmake >= 3.4.3
BuildRequires: gcc-c++ binutils-gold
%if %{with ninja}
BuildRequires: ninja
%endif
BuildRequires: llvm-devel = %{version}
BuildRequires: libxml2-devel
BuildRequires: libzstd-devel
%if 0%{?suse_version}
BuildRequires: fdupes
%endif
BuildRoot:     %{_tmppath}/%{name}-root
Source0:        https://github.com/llvm/llvm-project/releases/download/llvmorg-%{realver}/%{realname}-%{realver}%{?extraver}.src.%{srcext}
Source1:        https://github.com/llvm/llvm-project/raw/llvmorg-%{realver}/libunwind/include/mach-o/compact_unwind_encoding.h
# Cmake modules
Source15:      https://github.com/llvm/llvm-project/raw/llvmorg-%{realver}/cmake/Modules/CMakePolicy.cmake

%description
LLD is a linker from the LLVM project. That is a drop-in replacement
for system linkers and runs much faster than them. It also provides
features that are useful for toolchain developers.

The linker supports ELF (Unix), PE/COFF (Windows), Mach-O (macOS) and
WebAssembly in descending order of completeness. Internally, LLD consists
of several different linkers. The ELF port is the one that will be described
in this document. The PE/COFF port is complete, including Windows debug
info (PDB) support. The WebAssembly port is still a work in progress (See
WebAssembly lld port). The Mach-O port is built based on a different
architecture than the others. For the details about Mach-O, please read
ATOM-based lld.

%package -n liblld%{gen}
Group:         System/Libraries
Summary:       LLD shared libraries
Provides:      liblld = %{version}-%{release}
Provides:      libLLD = %{version}-%{release}
Provides:      libLLD%{gen} = %{version}-%{release}
Provides:      liblldCOFF%{gen}   = %{version}-%{release}
Provides:      liblldCommon%{gen} = %{version}-%{release}
Provides:      liblldELF%{gen}    = %{version}-%{release}
Provides:      liblldMachO%{gen}  = %{version}-%{release}
Provides:      liblldMinGW%{gen}  = %{version}-%{release}
Provides:      liblldWasm%{gen}   = %{version}-%{release}

%description -n liblld%{gen}
Shared libraries from the LLD - the linker from the LLVM project.

%package devel
Group:         Development/Languages/C and C++
Summary:       Developent files for %{name}
Requires:      liblld%{gen} = %{version}-%{release}
### Requires:      %{name} = %{version}-%{release}

%description devel
Developent files for %{name} - The LLVM Linker

# Preparation step (unpackung and patching if necessary)
%prep
%setup -q -n %{realname}-%{realver}%{?extraver}.src
%{__install} -D -m0644 %{S:1} include/mach-o/compact_unwind_encoding.h
%{__install} -m0644 %{S:15} cmake/modules/
# Don't use upper level CMake modules
%{__sed} -ri \
 -e '/^\s*set\(LLVM_COMMON_CMAKE_UTILS/ s|\.\./||' \
 -e 's|/Modules|/modules|' \
 CMakeLists.txt

%build
_CFLAGS='%{optflags}'
_LDFLAGS='-Wl,--as-needed -Wl,--strip-all -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,now -Wl,-z,relro'
cmake -S . -B build \
%if %{with ninja}
 -G Ninja \
%endif
 -Wno-dev \
 -DCMAKE_INSTALL_PREFIX=%{_prefix} \
 -DCMAKE_BUILD_TYPE=Release \
 -DCMAKE_CXX_FLAGS_RELEASE="$_CFLAGS -std=gnu++17" \
 -DCMAKE_C_FLAGS_RELEASE="$_CFLAGS" \
 -DCMAKE_EXE_LINKER_FLAGS_RELEASE="$_LDFLAGS" \
 -DCMAKE_MODULE_LINKER_FLAGS_RELEASE="$_LDFLAGS" \
 -DCMAKE_SHARED_LINKER_FLAGS_RELEASE="$_LDFLAGS -shared" \
 -DCMAKE_SKIP_RPATH=YES \
 -DCMAKE_VERBOSE_MAKEFILE=YES \
 \
 -DBUILD_SHARED_LIBS=YES \
 -DLLVM_ENABLE_LTO=ON
%if %{with ninja}
ninja -v -C build %{?_smp_mflags}
%else
%{__make} -C build %{?_smp_mflags}
%endif

%install
%if %{with ninja}
DESTDIR=%{buildroot} ninja -v -C build install
%else
%{__make} -C build install DESTDIR=%{buildroot}
%endif
%{__install} -d -m755 %{buildroot}%{_sysconfdir}/alternatives/
touch %{buildroot}%{_sysconfdir}/alternatives/ld
%{__ln_s} -f %{_sysconfdir}/alternatives/ld %{buildroot}%{_bindir}/ld

%clean
[ "%{buildroot}" != "/" ] && %{__rm} -rf %{buildroot}

%files
%defattr(-,root,root)
%doc LICENSE.TXT README.md
%ghost %{_sysconfdir}/alternatives/ld
%{_bindir}/*

%files -n liblld%{gen}
%defattr(-,root,root)
%{_libdir}/*.so.%{gen}

%files devel
%defattr(-,root,root)
%{_includedir}/lld/
%{_libdir}/*.so
%dir %{_libdir}/cmake/lld
%dir %{_libdir}/cmake
%{_libdir}/cmake/lld/LLD*.cmake
%exclude %{_includedir}/mach-o/compact_unwind_encoding.h

%post
/usr/sbin/update-alternatives \
 --install %{_bindir}/ld ld %{_bindir}/lld 3

%postun
if [ ${1} -eq 0 ]; then
  /usr/sbin/update-alternatives --remove ld %{_bindir}/lld
  /usr/sbin/update-alternatives --auto ld
fi

%post   -n liblld%{gen} -p /sbin/ldconfig
%postun -n liblld%{gen} -p /sbin/ldconfig

%changelog