pypy: remove explicit darwin minimum SDK (#471446)

pkgs/development/interpreters/python/pypy/darwin_version_min.patch

@@ -0,0 +1,19 @@
+diff --git a/rpython/translator/platform/darwin.py b/rpython/translator/platform/darwin.py
+index 8c824a8459..f407fb6c07 100644
+--- a/rpython/translator/platform/darwin.py
++++ b/rpython/translator/platform/darwin.py
+@@ -26,12 +26,12 @@ class Darwin(posix.BasePosix):
+     standalone_only = ('-mdynamic-no-pic',)
+     shared_only = ()
+ 
+-    link_flags = (DARWIN_VERSION_MIN,)
++    link_flags = ()
+     cflags = ('-O3',
+               '-fomit-frame-pointer',
+               # The parser turns 'const char *const *includes' into 'const const char **includes'
+               '-Wno-duplicate-decl-specifier',
+-              DARWIN_VERSION_MIN,)
++              )
+ 
+     so_ext = 'dylib'
+     DEFAULT_CC = 'clang'

pkgs/development/interpreters/python/pypy/default.nix

@@ -171,6 +171,11 @@ stdenv.mkDerivation rec {
       inherit (sqlite) out dev;
       libsqlite = "${sqlite.out}/lib/libsqlite3${stdenv.hostPlatform.extensions.sharedLibrary}";
     })
+
+    # PyPy sets an explicit minimum SDK version for darwin that is much older
+    # than what we default to on nixpkgs.
+    # Simply removing the explicit flag makes it use our default instead.
+    ./darwin_version_min.patch
   ];
 
   postPatch = ''