bpo-36659: distutils UnixCCompiler removes stdlib from rpath

Lib/distutils/unixccompiler.py

@@ -82,6 +82,15 @@ class UnixCCompiler(CCompiler):
     if sys.platform == "cygwin":
         exe_extension = ".exe"
 
+    def _fix_lib_args(self, libraries, library_dirs, runtime_library_dirs):
+        """Remove standard library path from rpath"""
+        libraries, library_dirs, runtime_library_dirs = super()._fix_lib_args(
+            libraries, library_dirs, runtime_library_dirs)
+        libdir = sysconfig.get_config_var('LIBDIR')
+        if runtime_library_dirs and (libdir in runtime_library_dirs):
+            runtime_library_dirs.remove(libdir)
+        return libraries, library_dirs, runtime_library_dirs
+
     def preprocess(self, source, output_file=None, macros=None,
                    include_dirs=None, extra_preargs=None, extra_postargs=None):
         fixed_args = self._fix_compile_args(None, macros, include_dirs)

Misc/NEWS.d/next/Library/2019-04-18-17-08-26.bpo-36659.no6Dvs.rst

@@ -0,0 +1,2 @@
+distutils UnixCCompiler now removes the standard library from the run-time
+search path ("rpath").