Adapt to new packaging

Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>

rust-num_cpus.spec

@@ -7,9 +7,10 @@
 
 Name:           rust-%{crate}
 Version:        1.8.0
-Release:        5%{?dist}
+Release:        6%{?dist}
 Summary:        Get the number of CPUs on a machine
 
+# Upstream license specification: MIT/Apache-2.0
 License:        MIT or ASL 2.0
 URL:            https://crates.io/crates/num_cpus
 Source0:        https://crates.io/api/v1/crates/%{crate}/%{version}/download#/%{crate}-%{version}.crate
@@ -17,21 +18,38 @@ Source0:        https://crates.io/api/v1/crates/%{crate}/%{version}/download#/%{
 ExclusiveArch:  %{rust_arches}
 
 BuildRequires:  rust-packaging
-# [dependencies]
+BuildRequires:  (crate(libc/default) >= 0.2.26 with crate(libc/default) < 0.3.0)
-BuildRequires:  (crate(libc) >= 0.2.26 with crate(libc) < 0.3.0)
 
-%description
+%global _description \
-%{summary}.
+Get the number of CPUs on a machine.
+
+%description %{_description}
 
 %package        devel
 Summary:        %{summary}
 BuildArch:      noarch
 
-%description    devel
+%description    devel %{_description}
-Get the number of CPUs on a machine.
 
 This package contains library source intended for building other packages
-which use %{crate} from crates.io.
+which use "%{crate}" crate.
+
+%files          devel
+%license LICENSE-MIT LICENSE-APACHE
+%doc README.md CHANGELOG.md CONTRIBUTING.md
+%{cargo_registry}/%{crate}-%{version}/
+
+%package     -n %{name}+default-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+default-devel %{_description}
+
+This package contains library source intended for building other packages
+which use "default" feature of "%{crate}" crate.
+
+%files       -n %{name}+default-devel
+%ghost %{cargo_registry}/%{crate}-%{version}/Cargo.toml
 
 %prep
 %autosetup -n %{crate}-%{version} -p1
@@ -48,12 +66,10 @@ which use %{crate} from crates.io.
 %cargo_test
 %endif
 
-%files          devel
-%license LICENSE-MIT LICENSE-APACHE
-%doc README.md CHANGELOG.md CONTRIBUTING.md
-%{cargo_registry}/%{crate}-%{version}/
-
 %changelog
+* Fri Oct 26 2018 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 1.8.0-6
+- Adapt to new packaging
+
 * Sun Oct 07 2018 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 1.8.0-5
 - Run tests in infrastructure