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-rw-r--r--include/stdio.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/stdio.h b/include/stdio.h
index e0006d2e7..831aa1c36 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -854,7 +854,7 @@ extern char *cuserid (char *__s);
#endif /* Use X/Open, but not issue 6. */
-#if 0 /* def __USE_GNU uClibc note: not supported */
+#if defined __USE_GNU && defined __UCLIBC_HAS_OBSTACK__
struct obstack; /* See <obstack.h>. */
/* Write formatted output to an obstack. */
@@ -865,7 +865,7 @@ extern int obstack_vprintf (struct obstack *__restrict __obstack,
const char *__restrict __format,
__gnuc_va_list __args)
__THROW __attribute__ ((__format__ (__printf__, 2, 0)));
-#endif /* Use GNU. */
+#endif /* USE_GNU && UCLIBC_HAS_OBSTACK. */
#if defined __USE_POSIX || defined __USE_MISC