--- /dev/null
+# TODO
+# - consider a rust-std package containing .../rustlib/$target
+# This might allow multilib cross-compilation to work naturally.
+
+# The channel can be stable, beta, or nightly
+%define channel stable
+
+#
+# Conditional build:
+%bcond_with bootstrap
+%bcond_without tests # build without tests
+
+%if "%{channel}" == "stable"
+%define rustc_package rustc-%{version}
+%else
+%define rustc_package rustc-%{channel}
+%endif
+
+# To bootstrap from scratch, set the channel and date from src/stage0.txt
+# e.g. 1.10.0 wants rustc: 1.9.0-2016-05-24
+# or nightly wants some beta-YYYY-MM-DD
+%define bootstrap_channel 1.11.0
+%define bootstrap_date 2016-08-16
+%define bootstrap_base https://static.rust-lang.org/dist/%{bootstrap_date}/rustc-%{bootstrap_channel}
+
+Summary: The Rust Programming Language
+Name: rust
+Version: 1.12.0
+Release: 0.1
+License: (ASL 2.0 or MIT) and (BSD and ISC and MIT)
+# ^ written as: (rust itself) and (bundled libraries)
+Group: Development/Languages
+Source0: https://static.rust-lang.org/dist/%{rustc_package}-src.tar.gz
+%if %{with bootstrap}
+Source1: %{bootstrap_base}-x86_64-unknown-linux-gnu.tar.gz
+Source2: %{bootstrap_base}-i686-unknown-linux-gnu.tar.gz
+%endif
+URL: https://www.rust-lang.org/
+BuildRequires: cmake
+BuildRequires: curl
+BuildRequires: gcc
+BuildRequires: libstdc++-devel
+BuildRequires: llvm-devel
+BuildRequires: python
+BuildRequires: zlib-devel
+%if %{without bootstrap}
+BuildRequires: %{name} < %{version}-%{release}
+BuildRequires: %{name} >= %{bootstrap_channel}
+%endif
+# make check needs "ps" for src/test/run-pass/wait-forked-but-failed-child.rs
+BuildRequires: procps
+# TODO: work on unbundling these!
+Provides: bundled(hoedown) = 3.0.5
+Provides: bundled(jquery) = 2.1.4
+Provides: bundled(libbacktrace) = 6.1.0
+Provides: bundled(miniz) = 1.14
+# The C compiler is needed at runtime just for linking. Someday rustc might
+# invoke the linker directly, and then we'll only need binutils.
+# https://github.com/rust-lang/rust/issues/11937
+Requires: gcc
+BuildRoot: %{tmpdir}/%{name}-%{version}-root-%(id -u -n)
+# Only x86_64 and i686 are Tier 1 platforms at this time.
+# https://doc.rust-lang.org/stable/book/getting-started.html#tier-1
+ExclusiveArch: %{x8664} %{ix86} %{arm}
+
+%define rust_triple %{_target_cpu}-unknown-linux-gnu
+
+%if %{without bootstrap}
+%define local_rust_root %{_prefix}
+%else
+%define bootstrap_root rustc-%{bootstrap_channel}-%{rust_triple}
+%define local_rust_root %{_builddir}/%{rustc_package}/%{bootstrap_root}/rustc
+%endif
+
+# ALL Rust libraries are private, because they don't keep an ABI.
+%global _privatelibs lib.*-[[:xdigit:]]{8}[.]so.*
+%global __provides_exclude ^(%{_privatelibs})$
+%global __requires_exclude ^(%{_privatelibs})$
+
+%description
+Rust is a systems programming language that runs blazingly fast,
+prevents segfaults, and guarantees thread safety.
+
+This package includes the Rust compiler, standard library, and
+documentation generator.
+
+%package gdb
+Summary: GDB pretty printers for Rust
+Requires: gdb
+%if "%{_rpmversion}" >= "5"
+BuildArch: noarch
+%endif
+
+%description gdb
+This package includes the rust-gdb script, which allows easier
+debugging of Rust programs.
+
+%package doc
+Summary: Documentation for Rust
+# NOT BuildArch: noarch
+# Note, while docs are mostly noarch, some things do vary by target_arch.
+# Koji will fail the build in rpmdiff if two architectures build a noarch
+# subpackage differently, so instead we have to keep its arch.
+
+%description doc
+This package includes HTML documentation for the Rust programming
+language and its standard library.
+
+%prep
+%setup -q -n %{rustc_package}
+%if %{with bootstrap}
+%ifarch %{x8664}
+tar xf %{SOURCE1}
+%endif
+%ifarch %{ix86}
+tar xf %{SOURCE2}
+%endif
+test -f %{local_rust_root}/bin/rustc
+%endif
+
+# unbundle
+rm -r src/jemalloc/
+rm -r src/llvm/
+
+# extract bundled licenses for packaging
+cp -p src/rt/hoedown/LICENSE src/rt/hoedown/LICENSE-hoedown
+sed -e '/*\//q' src/libbacktrace/backtrace.h \
+ >src/libbacktrace/LICENSE-libbacktrace
+
+# rust-gdb has hardcoded SYSROOT/lib -- let's make it noarch
+sed -i -e 's#DIRECTORY=".*"#DIRECTORY="%{_datadir}/%{name}/etc"#' \
+ src/etc/rust-gdb
+
+# These tests assume that alloc_jemalloc is present
+sed -i -e '1i // ignore-test jemalloc is disabled' \
+ src/test/compile-fail/allocator-dylib-is-system.rs \
+ src/test/compile-fail/allocator-rust-dylib-is-jemalloc.rs \
+ src/test/run-pass/allocator-default.rs
+
+# Fedora's LLVM doesn't support any mips targets -- see "llc -version".
+# Fixed properly by Rust PR36344, which should be released in 1.13.
+sed -i -e '/target=mips/,+1s/^/# unsupported /' \
+ src/test/run-make/atomic-lock-free/Makefile
+
+%if %{without bootstrap}
+# The hardcoded stage0 "lib" is inappropriate when using Fedora's own rustc
+sed -i -e '/^HLIB_RELATIVE/s/lib$/$$(CFG_LIBDIR_RELATIVE)/' mk/main.mk
+%endif
+
+%build
+%configure \
+ --disable-option-checking \
+ --build=%{rust_triple} --host=%{rust_triple} --target=%{rust_triple} \
+ --enable-local-rust --local-rust-root=%{local_rust_root} \
+ --llvm-root=%{_prefix} --disable-codegen-tests \
+ --disable-jemalloc \
+ --disable-rpath \
+ --enable-debuginfo \
+ --release-channel=%{channel}
+
+%{__make} VERBOSE=1
+
+%if %{with tests}
+# Note, many of the tests execute in parallel threads,
+# so it's better not to use a parallel make here.
+%{__make} -j1 check-lite VERBOSE=1 -k
+%endif
+
+
+%install
+rm -rf $RPM_BUILD_ROOT
+%{__make} install \
+ VERBOSE=1 \
+ DESTDIR=$RPM_BUILD_ROOT
+
+# Remove installer artifacts (manifests, uninstall scripts, etc.)
+find $RPM_BUILD_ROOT%{_libdir}/rustlib/ -maxdepth 1 -type f -exec rm -v '{}' '+'
+
+# We don't want to ship the target shared libraries for lack of any Rust ABI.
+find $RPM_BUILD_ROOT%{_libdir}/rustlib/ -type f -name '*.so' -exec rm -v '{}' '+'
+
+# The remaining shared libraries should be executable for debuginfo extraction.
+find $RPM_BUILD_ROOT%{_libdir}/ -type f -name '*.so' -exec chmod -v +x '{}' '+'
+
+# They also don't need the .rustc metadata anymore, so they won't support linking.
+# (but direct section removal breaks dynamic symbols -- leave it for now...)
+#find $RPM_BUILD_ROOT/%{_libdir}/ -type f -name '*.so' -exec objcopy -R .rustc '{}' ';'
+
+# FIXME: __os_install_post will strip the rlibs
+# -- should we find a way to preserve debuginfo?
+
+# Remove unwanted documentation files (we already package them)
+rm $RPM_BUILD_ROOT%{_docdir}/%{name}/README.md
+rm $RPM_BUILD_ROOT%{_docdir}/%{name}/COPYRIGHT
+rm $RPM_BUILD_ROOT%{_docdir}/%{name}/LICENSE-APACHE
+rm $RPM_BUILD_ROOT%{_docdir}/%{name}/LICENSE-MIT
+
+# Sanitize the HTML documentation
+find $RPM_BUILD_ROOT%{_docdir}/%{name}/html -empty -delete
+find $RPM_BUILD_ROOT%{_docdir}/%{name}/html -type f -exec chmod -x '{}' '+'
+
+# Move rust-gdb's python scripts so they're noarch
+install -d $RPM_BUILD_ROOT%{_datadir}/%{name}
+mv -v $RPM_BUILD_ROOT%{_libdir}/rustlib%{_sysconfdir} $RPM_BUILD_ROOT%{_datadir}/%{name}/
+
+%clean
+rm -rf $RPM_BUILD_ROOT
+
+%post -p /sbin/ldconfig
+%postun -p /sbin/ldconfig
+
+%files
+%defattr(644,root,root,755)
+%doc COPYRIGHT LICENSE-APACHE LICENSE-MIT
+%doc src/libbacktrace/LICENSE-libbacktrace
+%doc src/rt/hoedown/LICENSE-hoedown
+%doc README.md
+%attr(755,root,root) %{_bindir}/rustc
+%attr(755,root,root) %{_bindir}/rustdoc
+%{_mandir}/man1/rustc.1*
+%{_mandir}/man1/rustdoc.1*
+%{_libdir}/lib*
+%dir %{_libdir}/rustlib
+%{_libdir}/rustlib/%{rust_triple}
+
+%files gdb
+%defattr(644,root,root,755)
+%attr(755,root,root) %{_bindir}/rust-gdb
+%{_datadir}/%{name}
+
+%files doc
+%defattr(644,root,root,755)
+%dir %{_docdir}/%{name}
+%doc %{_docdir}/%{name}/html/FiraSans-LICENSE.txt
+%doc %{_docdir}/%{name}/html/Heuristica-LICENSE.txt
+%doc %{_docdir}/%{name}/html/LICENSE-APACHE.txt
+%doc %{_docdir}/%{name}/html/LICENSE-MIT.txt
+%doc %{_docdir}/%{name}/html/SourceCodePro-LICENSE.txt
+%doc %{_docdir}/%{name}/html/SourceSerifPro-LICENSE.txt
+%doc %{_docdir}/%{name}/html/
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