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-rw-r--r--include/errno.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/errno.h b/include/errno.h
index bd363a258..527326b17 100644
--- a/include/errno.h
+++ b/include/errno.h
@@ -47,7 +47,7 @@ __BEGIN_DECLS
extern int errno;
#endif
-#if 0 /*def __USE_GNU uClibc note: not supported */
+#if defined __USE_GNU && defined __UCLIBC_HAS_PROGRAM_INVOCATION_NAME__
/* The full and simple forms of the name with which the program was
invoked. These variables are set up automatically at startup based on