# If you need to bootstrap this, turn this on.
# Otherwise, you have a loop with libcxxabi
%global bootstrap 1

Name:		libcxx
Version:	3.8.0
Release:	3%{?dist}
Summary:	C++ standard library targeting C++11
License:	MIT or NCSA
URL:		http://libcxx.llvm.org/
Source0:	http://llvm.org/releases/%{version}/libcxx-%{version}.src.tar.xz
BuildRequires:	clang llvm-devel cmake
%if %{bootstrap} < 1
BuildRequires:	libcxxabi-devel
%endif
# PPC64 (on EL7) doesn't like this code.
# /builddir/build/BUILD/libcxx-3.8.0.src/include/thread:431:73: error: '(9.223372036854775807e+18 / 1.0e+9)' is not a constant expression
# _LIBCPP_CONSTEXPR duration<long double> _Max = nanoseconds::max();
ExcludeArch:	ppc64 ppc64le

%description
libc++ is a new implementation of the C++ standard library, targeting C++11.

%package devel
Summary:	Headers and libraries for libcxx devel
Requires:	%{name}%{?_isa} = %{version}-%{release}
%if %{bootstrap} < 1
Requires:	libcxxabi-devel
%endif


%description devel
%{summary}.

%prep
%setup -q -n %{name}-%{version}.src

%build
mkdir _build
cd _build
# Clang in older releases than f24 can't build this code without crashing.
# So, we use gcc there. But the really old version in RHEL 6 works. Huh.
%cmake .. \
%if 0%{?rhel} == 6
	-DCMAKE_C_COMPILER=/usr/bin/clang \
	-DCMAKE_CXX_COMPILER=/usr/bin/clang++ \
%else
%if 0%{?fedora} >= 24
	-DCMAKE_C_COMPILER=/usr/bin/clang \
	-DCMAKE_CXX_COMPILER=/usr/bin/clang++ \
%else
	-DCMAKE_C_COMPILER=/usr/bin/gcc \
	-DCMAKE_CXX_COMPILER=/usr/bin/g++ \
%endif
%endif
	-DLLVM_CONFIG=%{_bindir}/llvm-config \
%if %{bootstrap} < 1
	-DLIBCXX_CXX_ABI=libcxxabi \
	-DLIBCXX_CXX_ABI_INCLUDE_PATHS=%{_includedir} \
%endif
%if %{__isa_bits} == 64
	-DLIBCXX_LIBDIR_SUFFIX:STRING=64 \
%endif
	-DCMAKE_BUILD_TYPE=RelWithDebInfo


make %{?_smp_mflags}

%install
cd _build
make install DESTDIR=%{buildroot}

%post -p /sbin/ldconfig

%postun -p /sbin/ldconfig

%files
%license LICENSE.TXT
%doc CREDITS.TXT TODO.TXT
%{_libdir}/libc++.so.*

%files devel
%{_includedir}/c++/
%{_libdir}/libc++.so

%changelog
* Thu May 19 2016 Tom Callaway <spot@fedoraproject.org> - 3.8.0-3
- use gcc on el7, fedora < 24. use clang on el6 and f24+
  MAGIC.
- bootstrap on

* Tue May 3 2016 Tom Callaway <spot@fedoraproject.org> - 3.8.0-2
- bootstrap off

* Tue May 3 2016 Tom Callaway <spot@fedoraproject.org> - 3.8.0-1
- initial package
- bootstrap on