sysif.h: remove dependency on off_t.

The sysif.h header breaks on some systems because it
references off_t, which requires <sys/types.h>. But the off_t
materials in this header are unnecessary; we can remove
them.

* sysif.c (off_t_num, num_off_t): Extern functions become static,
and are wrapped with #if HAVE_FSEEKO.  These functions are
only called from sysif.c, only from code relying on fseeko.

* sysif.h (OFF_T_MAX, OFF_T_MIN): Macros not used anywhere are removed.
(off_t_num, num_off_t): Declarations removed.

1 files changed, 6 insertions, 2 deletions

diff --git a/sysif.c b/sysif.c
index 6d742b35..aa36c3a6 100644
--- a/sysif.c
+++ b/sysif.c
@@ -1492,7 +1492,9 @@ static val crypt_wrap(val wkey, val wsalt)
 
 #endif
 
-off_t off_t_num(val num, val self)
+#if HAVE_FSEEKO
+
+static off_t off_t_num(val num, val self)
 {
   switch (CHAR_BIT * sizeof(off_t)) {
   case 32:
@@ -1504,7 +1506,7 @@ off_t off_t_num(val num, val self)
   }
 }
 
-val num_off_t(off_t off)
+static val num_off_t(off_t off)
 {
   if (sizeof (off_t) <= sizeof (cnum)) {
     return num(off);
@@ -1517,6 +1519,8 @@ val num_off_t(off_t off)
   }
 }
 
+#endif
+
 val stdio_ftell(FILE *f)
 {
 #if HAVE_FSEEKO