include/stdint.h: add sig_atomic_t limits
#define INTPTR_MAX PTR_MAX
#define UINTPTR_MAX UPTR_MAX
+/* Limits of sig_atomic_t type */
+
+#define SIG_ATOMIC_MIN INT32_MIN
+#define SIG_ATOMIC_MAX INT32_MAX
+
/* Limits of greatest-width integer types */
#ifdef __INT64_DEFINED
