remove stdc++ from everywhere

src/sage/misc/cython.py

@@ -41,7 +41,7 @@
 cblas_include_dirs = list(cblas_pc['include_dirs'])
 
 standard_libs = [
-    'mpfr', 'gmp', 'gmpxx', 'stdc++', 'pari', 'm',
+    'mpfr', 'gmp', 'gmpxx', 'pari', 'm',
     'ec', 'gsl',
 ] + cblas_libs + [
     'ntl']

src/sage_setup/command/sage_build_cython.py

@@ -271,8 +271,6 @@ def create_extension(self, template, kwds):
 
         - Add dependencies on header files for certain libraries
 
-        - Ensure that C++ extensions link with -lstdc++
-
         - Sort the libraries according to the library order
 
         - Add some default compile/link args and directories
@@ -286,10 +284,8 @@ def create_extension(self, template, kwds):
         lang = kwds.get('language', 'c')
         cplusplus = (lang == "c++")
 
-        # Libraries: add stdc++ if needed and sort them
+        # Libraries: sort them
         libs = kwds.get('libraries', [])
-        if cplusplus:
-            libs = libs + ['stdc++']
         kwds['libraries'] = sorted(set(libs),
                 key=lambda lib: library_order.get(lib, 0))
 

src/sage_setup/library_order.py

@@ -72,8 +72,7 @@
 # manually reorder the libraries according to this list. The order is
 # important in particular for Cygwin. Any libraries which are not
 # listed here will be added at the end of the list (without changing
-# their relative order). There is one exception: stdc++ is always put
-# at the very end of the list.
+# their relative order).
 from sage.env import cython_aliases
 aliases = cython_aliases()
 
@@ -101,5 +100,3 @@
 for i in range(n):
     lib = library_order_list[i]
     library_order[lib] = i-n
-
-library_order["stdc++"] = 1000