Enhance setup.py cmake errors reporting

setup.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 # setup script
 # Copyright (C) 2019, 2020  Nguyễn Gia Phong
+# Copyright (C) 2020  Francesco Caliumi
 #
 # This file is part of palace.
 #
@@ -17,6 +18,7 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with palace.  If not, see <https://www.gnu.org/licenses/>.
 
+import sys
 import re
 from distutils import log
 from distutils.command.clean import clean
@@ -27,7 +29,7 @@ from operator import methodcaller
 from os import environ, unlink
 from os.path import dirname, join
 from platform import system
-from subprocess import DEVNULL, PIPE, run
+from subprocess import DEVNULL, PIPE, run, CalledProcessError
 
 from Cython.Build import cythonize
 from setuptools import setup, Extension
@@ -57,8 +59,14 @@ class BuildAlure2Ext(build_ext):
         mkpath(self.build_temp)
         copy_file(join(dirname(__file__), 'CMakeLists.txt'),
                   self.build_temp)
-        cmake = run(['cmake', '.'], check=True, stdout=DEVNULL, stderr=PIPE,
-                    cwd=self.build_temp, universal_newlines=True)
+        try:
+            cmake = run(['cmake', '.'],
+                        check=True, stdout=DEVNULL, stderr=PIPE,
+                        cwd=self.build_temp, universal_newlines=True)
+        except CalledProcessError as e:
+            print(e.stderr, file=sys.stderr)
+            raise e from None
+
         for key, value in map(methodcaller('groups'),
                               re.finditer(r'^alure2_(\w*)=(.*)$',
                                           cmake.stderr, re.MULTILINE)):