1 files changed, 17 insertions, 0 deletions
diff --git a/elf/dl-tunables.h b/elf/dl-tunables.h
index 6c49dcbf47..c92882acba 100644
--- a/elf/dl-tunables.h
+++ b/elf/dl-tunables.h
@@ -111,5 +111,22 @@ rtld_hidden_proto (__tunable_get_val)
 # define TUNABLES_FRONTEND_valstring 1
 /* The default value for TUNABLES_FRONTEND.  */
 # define TUNABLES_FRONTEND_yes TUNABLES_FRONTEND_valstring
+
+/* Compare two name strings, bounded by the name hardcoded in glibc.  */
+static inline bool
+__always_inline
+tunable_is_name (const char *orig, const char *envname)
+{
+  for (;*orig != '\0' && *envname != '\0'; envname++, orig++)
+    if (*orig != *envname)
+      break;
+
+  /* The ENVNAME is immediately followed by a value.  */
+  if (*orig == '\0' && *envname == '=')
+    return true;
+  else
+    return false;
+}
+
 #endif
 #endif