Latest update

test/testutil/output.h

@@ -10,8 +10,25 @@
 #ifndef HEADER_TU_OUTPUT_H
 # define HEADER_TU_OUTPUT_H
 
-#include <stdarg.h>
+# include <stdarg.h>
 
+# define ossl_test__attr__(x)
+# if defined(__GNUC__) && defined(__STDC_VERSION__) \
+    && !defined(__APPLE__)
+    /*
+     * Because we support the 'z' modifier, which made its appearance in C99,
+     * we can't use __attribute__ with pre C99 dialects.
+     */
+#  if __STDC_VERSION__ >= 199901L
+#   undef ossl_test__attr__
+#   define ossl_test__attr__ __attribute__
+#   if __GNUC__*10 + __GNUC_MINOR__ >= 44
+#    define ossl_test__printf__ __gnu_printf__
+#   else
+#    define ossl_test__printf__ __printf__
+#   endif
+#  endif
+# endif
 /*
  * The basic I/O functions used internally by the test framework.  These
  * can be overridden when needed. Note that if one is, then all must be.
@@ -19,14 +36,21 @@
 void test_open_streams(void);
 void test_close_streams(void);
 /* The following ALL return the number of characters written */
-int test_vprintf_stdout(const char *fmt, va_list ap);
-int test_vprintf_stderr(const char *fmt, va_list ap);
+int test_vprintf_stdout(const char *fmt, va_list ap)
+    ossl_test__attr__((__format__(ossl_test__printf__, 1, 0)));
+int test_vprintf_stderr(const char *fmt, va_list ap)
+    ossl_test__attr__((__format__(ossl_test__printf__, 1, 0)));
 /* These return failure or success */
 int test_flush_stdout(void);
 int test_flush_stderr(void);
 
 /* Commodity functions.  There's no need to override these */
-int test_printf_stdout(const char *fmt, ...);
-int test_printf_stderr(const char *fmt, ...);
+int test_printf_stdout(const char *fmt, ...)
+    ossl_test__attr__((__format__(ossl_test__printf__, 1, 2)));
+int test_printf_stderr(const char *fmt, ...)
+    ossl_test__attr__((__format__(ossl_test__printf__, 1, 2)));
+
+# undef ossl_test__printf__
+# undef ossl_test__attr__
 
 #endif                          /* HEADER_TU_OUTPUT_H */