Add patch to fix python3.8 compat

https://bugzilla.redhat.com/show_bug.cgi?id=1708643

0004-Read-os-release-instead-of-using-platform.linux_dist.patch

@@ -0,0 +1,54 @@
+From 8185dc37e0c03b62268c025e7b59bb4e8644f6a1 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
+Date: Sat, 13 Jul 2019 00:36:49 +0200
+Subject: [PATCH] Read os-release instead of using
+ platform.linux_distribution()
+
+The function was removed in https://bugs.python.org/issue1322
+and cannot be used in python3.8.
+
+There are replacements outside of the stdlib, but it doesn't seem
+worth it it add a dependency on another module. Instead, a simple
+parser for os-release is implemented. os-release is present on all
+distros from the last few years and PRETTY_NAME gives a reliable
+display name of the distro without any heuristics.
+---
+ blosc/toplevel.py | 18 +++++++++++++++++-
+ 1 file changed, 17 insertions(+), 1 deletion(-)
+
+diff --git a/blosc/toplevel.py b/blosc/toplevel.py
+index 04ad9f0217..94cf4af910 100644
+--- a/blosc/toplevel.py
++++ b/blosc/toplevel.py
+@@ -800,6 +800,20 @@ def load_tests(loader, tests, pattern):
+     tests.addTests(doctest.DocTestSuite())
+     return tests
+ 
++def os_release_pretty_name():
++    for p in ('/etc/os-release', '/usr/lib/os-release'):
++        try:
++            f = open(p, 'rt')
++            for line in f:
++                name, _, value = line.rstrip().partition('=')
++                if name == 'PRETTY_NAME':
++                    if len(value) >= 2 and value[0] in '"\'' and value[0] == value[-1]:
++                        value = value[1:-1]
++                    return value
++        except IOError:
++            pass
++    else:
++        return None
+ 
+ def print_versions():
+     """Print all the versions of software that python-blosc relies on."""
+@@ -815,7 +829,9 @@ def print_versions():
+     (sysname, nodename, release, version, machine, processor) = platform.uname()
+     print("Platform: %s-%s-%s (%s)" % (sysname, release, machine, version))
+     if sysname == "Linux":
+-        print("Linux dist: %s" % " ".join(platform.linux_distribution()[:-1]))
++        distro = os_release_pretty_name()
++        if distro:
++            print("Linux dist:", distro)
+     if not processor:
+         processor = "not recognized"
+     print("Processor: %s" % processor)

python-blosc.spec

@@ -10,6 +10,8 @@ Source0:        https://github.com/Blosc/python-blosc/archive/v%{version}/blosc-
 Patch1:         0001-blosc_extenion-constify-char-pointers-for-Py_BuildVa.patch
 Patch2:         0002-setup.py-unbreak-build-on-architectures-which-don-t-.patch
 Patch3:         0003-setup.py-catch-import-error-for-cpuinfo.patch
+# https://github.com/Blosc/python-blosc/pull/202
+Patch4:         0004-Read-os-release-instead-of-using-platform.linux_dist.patch
 
 BuildRequires:  gcc
 BuildRequires:  blosc-devel >= 1.16.0