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-rw-r--r--zconf.h11
1 files changed, 10 insertions, 1 deletions
diff --git a/zconf.h b/zconf.h
index 6ad8a04edaee..1988920109fd 100644
--- a/zconf.h
+++ b/zconf.h
@@ -364,8 +364,11 @@ typedef uLong FAR uLongf;
# define Z_HAVE_UNISTD_H
#endif
-#if defined(Z_HAVE_UNISTD_H) || _LARGEFILE64_SOURCE == 1
+#ifdef STDC
# include <sys/types.h> /* for off_t */
+#endif
+
+#if defined(Z_HAVE_UNISTD_H) || defined(_LARGEFILE64_SOURCE)
# include <unistd.h> /* for SEEK_* and off_t */
# ifdef VMS
# include <unixio.h> /* for off_t */
@@ -385,6 +388,12 @@ typedef uLong FAR uLongf;
# define z_off_t long
#endif
+#if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0
+# define z_off64_t off64_t
+#else
+# define z_off64_t z_off_t
+#endif
+
#if defined(__OS400__)
# define NO_vsnprintf
#endif