Revert "do not expose a cache_tag, until we can properly (de)serialize code"

This reverts commit 9861aa8fefbb4123623abcf1a3e3a961f86ef519.

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/ImpModuleBuiltins.java

@@ -462,8 +462,8 @@ Object run(
         static String getSoAbi(PythonContext ctxt) {
             PythonModule sysModule = ctxt.getCore().lookupBuiltinModule("sys");
             Object implementationObj = ReadAttributeFromObjectNode.getUncached().execute(sysModule, "implementation");
-            // sys.implementation.name
-            String implName = (String) PInteropGetAttributeNode.getUncached().execute(implementationObj, "name");
+            // sys.implementation.cache_tag
+            String cacheTag = (String) PInteropGetAttributeNode.getUncached().execute(implementationObj, "cache_tag");
             // sys.implementation._multiarch
             String multiArch = (String) PInteropGetAttributeNode.getUncached().execute(implementationObj, "_multiarch");
 
@@ -480,7 +480,7 @@ static String getSoAbi(PythonContext ctxt) {
                 soExt = ".so";
             }
 
-            return "." + implName + "-" + toolchainId + "-" + multiArch + soExt;
+            return "." + cacheTag + "-" + toolchainId + "-" + multiArch + soExt;
         }
     }
 

graalpython/lib-graalpython/sys.py

@@ -44,7 +44,7 @@ def make_implementation_info():
     )
     return SimpleNamespace(
         name="graalpython",
-        cache_tag=None,
+        cache_tag="graalpython",
         version=version_info_type(version_info),
         _multiarch=__gmultiarch
     )

graalpython/lib-python/3/distutils/sysconfig_graalpython.py

@@ -65,7 +65,7 @@ def _init_posix():
     darwin_native = sys.platform == "darwin" and __graalpython__.platform_id == "native"
 
     # note: this must be kept in sync with _imp.extension_suffixes
-    so_abi = sys.implementation.name + "-" + __graalpython__.platform_id + "-" + sys.implementation._multiarch
+    so_abi = sys.implementation.cache_tag + "-" + __graalpython__.platform_id + "-" + sys.implementation._multiarch
     so_ext = ".so" if not darwin_native else ".dylib"
     assert _imp.extension_suffixes()[0] == "." + so_abi + so_ext, "mismatch between extension suffix to _imp.extension_suffixes"