(uint64_t): Define to uintmax_t if

not defined, and if UINT64_MAX is not defined.
Required at least for Vax Ultrix4.3, which doesn't define uint64_t.
Reported by John David Anglin.

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/tempname.c b/lib/tempname.c
index d008c982f..5ead95ea3 100644
--- a/lib/tempname.c
+++ b/lib/tempname.c
@@ -107,6 +107,15 @@
 # define __secure_getenv getenv
 #endif
 
+/* Use the widest available unsigned type if uint64_t is not
+   available.  The algorithm below extracts a number less than 62**6
+   (approximately 2**35.725) from uint64_t, so ancient hosts where
+   uintmax_t is only 32 bits lose about 3.725 bits of randomness,
+   which is better than not having mkstemp at all.  */
+#if !defined UINT64_MAX && !defined uint64_t
+# define uint64_t uintmax_t
+#endif
+
 /* Return nonzero if DIR is an existent directory.  */
 static int
 direxists (const char *dir)