fix -Wstrict-prototypes warning

function declarations should always explicitly say no argument is expected,
as in C 'foo bar()' means bar can take any parameter.

This was noticed when building another project with -Wall -Wextra and getting
the following warning on installed header:
/usr/include/zck.h:66:5: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
   66 |     __attribute__ ((warn_unused_result));
      |     ^~~~~~~~~~~~~
/usr/include/zck.h:325:5: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  325 |     __attribute__ ((warn_unused_result));
      |     ^~~~~~~~~~~~~

diff --git a/include/zck.h.in b/include/zck.h.in
index 64e2ba1266642269fd09f40da505943c248367f5..17b7d203ff8656121d33e3bcac0286e88d5cd11e 100644 (file)
--- a/include/zck.h.in
+++ b/include/zck.h.in
@@ -62,7 +62,7 @@ typedef size_t (*zck_wcb)(void *ptr, size_t l, size_t c, void *dl_v);
  * Reading a zchunk file
  *******************************************************************/
 /* Initialize zchunk context */
-zckCtx *zck_create()
+zckCtx *zck_create(void)
     __attribute__ ((warn_unused_result));
 /* Initialize zchunk for reading */
 bool zck_init_read (zckCtx *zck, int src_fd)
@@ -321,7 +321,7 @@ char *zck_get_range(size_t start, size_t end)
     __attribute__ ((warn_unused_result));
 /* Get the minimum size needed to download in order to know how large the header
  * is */
-int zck_get_min_download_size()
+int zck_get_min_download_size(void)
     __attribute__ ((warn_unused_result));
 /* Get the number of separate range items in the range */
 int zck_get_range_count(zckRange *range)