Recommend libcrypt.so.1 for manylinux1 compatibility

python-pip.spec

@@ -23,7 +23,7 @@ Name:           python-%{srcname}
 # When updating, update the bundled libraries versions bellow!
 # You can use vendor_meta.sh in the dist git repo
 Version:        19.1.1
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        A tool for installing and managing Python packages
 
 # We bundle a lot of libraries with pip, which itself is under MIT license.
@@ -155,6 +155,22 @@ Provides: bundled(python%{1}dist(urllib3)) = 1.24.1
 Provides: bundled(python%{1}dist(webencodings)) = 0.5.1
 }
 
+# Some manylinux1 wheels need libcrypt.so.1.
+# Manylinux1, a common (as of 2019) platform tag for binary wheels, relies
+# on a glibc version that included ancient crypto functions, which were
+# moved to libxcrypt and then removed in:
+#  https://fedoraproject.org/wiki/Changes/FullyRemoveDeprecatedAndUnsafeFunctionsFromLibcrypt
+# The manylinux1 standard assumed glibc would keep ABI compatibility,
+# but that's only the case if libcrypt.so.1 (libxcrypt-compat) is around.
+# This should be solved in the next manylinux standard (but it may be
+# a long time until manylinux1 is phased out).
+# See: https://github.com/pypa/manylinux/issues/305
+# Note that manylinux is only applicable to x86 (both 32 and 64 bits)
+%global crypt_compat_recommends() %{expand:
+Recommends: (libcrypt.so.1()(64bit) if python3(x86-64))
+Recommends: (libcrypt.so.1 if python3(x86-32))
+}
+
 
 %if %{with python2}
 %package -n python2-%{srcname}
@@ -183,6 +199,8 @@ Requires:       python2-setuptools
 
 %{?python_provide:%python_provide python2-%{srcname}}
 
+%{crypt_compat_recommends}
+
 %description -n python2-%{srcname}
 pip is a package management system used to install and manage software packages
 written in Python. Many packages can be found in the Python Package Index
@@ -223,6 +241,8 @@ Requires:  python%{python3_pkgversion}-setuptools
 
 %{?python_provide:%python_provide python%{python3_pkgversion}-%{srcname}}
 
+%{crypt_compat_recommends}
+
 %description -n python%{python3_pkgversion}-%{srcname}
 pip is a package management system used to install and manage software packages
 written in Python. Many packages can be found in the Python Package Index
@@ -249,6 +269,8 @@ Requires:       ca-certificates
 %{bundled 2}
 %{bundled 3}
 
+%{crypt_compat_recommends}
+
 %description wheel
 A Python wheel of pip to use with venv.
 %endif
@@ -493,6 +515,9 @@ ln -sf %{buildroot}%{_bindir}/pip3 _bin/pip
 %endif
 
 %changelog
+* Mon Jul 15 2019 Petr Viktorin <pviktori@redhat.com> - 19.1.1-3
+- Recommend libcrypt.so.1 for manylinux1 compatibility
+
 * Mon Jun 10 2019 Miro Hrončok <mhroncok@redhat.com> - 19.1.1-2
 - Fix root warning when pip is invoked via python -m pip
 - Remove a redundant second WARNING prefix form the abovementioned warning