use alt signal stack when present for implementation-internal signals

[musl] / src / stdio / vfprintf.c

diff --git a/src/stdio/vfprintf.c b/src/stdio/vfprintf.c
index 2100eb5..9b961e7 100644 (file)
--- a/src/stdio/vfprintf.c
+++ b/src/stdio/vfprintf.c
@@ -5,6 +5,7 @@
 #include <string.h>
 #include <stdarg.h>
 #include <stddef.h>
+#include <stdlib.h>
 #include <wchar.h>
 #include <inttypes.h>
 #include <math.h>