Resolve "comparison of signed and unsigned values" compiler warnings.

* cord/cordprnt.c (CORD_vsprintf): Cast "prec" and "width" local
variables to size_t.
* dyn_load.c (GC_register_dynamic_libraries_dl_iterate_phdr): Change
type of "i" local variable to int.
* pthread_support.c (start_mark_threads): Likewise.
* os_dep.c (GC_repeat_read): Change type of "num_read" to size_t.
* os_dep.c (GC_get_maps): Change type of "result" local variable from
int to ssize_t; cast "result" to size_t in comparison.
* pthread_support.c (GC_remove_all_threads_but_me): Cast "result" to
int.
* pthread_support.c (GC_wait_for_gc_completion): Change type of
"old_gc_no" local variable to word.
* pthread_support.c (GC_lock): Change type of "i" local variable to
unsigned.
* tests/staticrootstest.c (main): Cast sizeof() value to int in
comparisons.

1 files changed, 1 insertions, 1 deletions

diff --git a/dyn_load.c b/dyn_load.c
index c2d23bfb..e823c8d8 100644
--- a/dyn_load.c
+++ b/dyn_load.c
@@ -544,7 +544,7 @@ STATIC GC_bool GC_register_dynamic_libraries_dl_iterate_phdr(void)
   dl_iterate_phdr(GC_register_dynlib_callback, &did_something);
   if (did_something) {
 #   ifdef PT_GNU_RELRO
-      size_t i;
+      int i;
 
       for (i = 0; i < n_load_segs; ++i) {
         if (load_segs[i].end > load_segs[i].start) {