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-rw-r--r--include/features.h5
-rw-r--r--include/libc-internal.h5
2 files changed, 9 insertions, 1 deletions
diff --git a/include/features.h b/include/features.h
index f4d70d70f..41e83a93f 100644
--- a/include/features.h
+++ b/include/features.h
@@ -198,9 +198,12 @@
# define __OPTIMIZE_SIZE__ 1
/* disable unsupported features */
-# undef _FORTIFY_SOURCE
# undef __LDBL_COMPAT
+# ifndef __UCLIBC_HAS_FORTIFY__
+# undef _FORTIFY_SOURCE
+# endif
+
# ifndef __UCLIBC_HAS_THREADS__
# if defined _REENTRANT || defined _THREAD_SAFE
# warning requested reentrant code, but thread support was disabled
diff --git a/include/libc-internal.h b/include/libc-internal.h
index 443b1fc50..3ac0b0509 100644
--- a/include/libc-internal.h
+++ b/include/libc-internal.h
@@ -65,6 +65,11 @@ libc_hidden_proto(__glibc_strerror_r)
/* internal access to program name */
extern const char *__uclibc_progname attribute_hidden;
+# ifdef __UCLIBC_HAS_FORTIFY__
+extern void __chk_fail(void) attribute_noreturn;
+libc_hidden_proto(__chk_fail)
+# endif
+
# endif /* IS_IN_libc */
#endif /* __ASSEMBLER__ */