diff -up ./setup.py.orig ./setup.py
--- ./setup.py.orig	2019-01-01 20:17:55.775281126 +0200
+++ ./setup.py	2019-01-01 20:18:41.833486600 +0200
@@ -670,7 +670,7 @@ class PyBuildExt(build_ext):
                                libraries=['m']) )
 
         # time libraries: librt may be needed for clock_gettime()
-        time_libs = []
+        time_libs = ['m']
         lib = sysconfig.get_config_var('TIMEMODULE_LIB')
         if lib:
             time_libs.append(lib)
@@ -1965,7 +1965,7 @@ class PyBuildExt(build_ext):
                         include_dirs=include_dirs,
                         extra_compile_args=extra_compile_args,
                         extra_link_args=extra_link_args,
-                        libraries=[],
+                        libraries=['m', 'dl'],
                         sources=sources,
                         depends=depends)
         # function my_sqrt() needs libm for sqrt()