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-rw-r--r--m4/jm-macros.m44
1 files changed, 4 insertions, 0 deletions
diff --git a/m4/jm-macros.m4 b/m4/jm-macros.m4
index 850dc8f86..85b70c7fd 100644
--- a/m4/jm-macros.m4
+++ b/m4/jm-macros.m4
@@ -41,4 +41,8 @@ AC_DEFUN(jm_MACROS,
[Define to the function xargmatch calls on failures.])
AC_DEFINE(ARGMATCH_DIE_DECL, [extern void usage ()],
[Define to the declaration of the xargmatch failure function.])
+
+ dnl Used to define SETVBUF in sys2.h.
+ AC_FUNC_SETVBUF_REVERSED
+
])