fix compilation warnings on 32-bit architectures

src/heapusage

@@ -5,7 +5,7 @@
 #
 # heapusage is distributed under the BSD 3-Clause license, see LICENSE for details.
 
-HU_VER="2.37"
+HU_VER="2.38"
 
 showusage()
 {

src/heapusage.1

@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
-.TH HEAPUSAGE "1" "June 2026" "heapusage v2.37" "User Commands"
+.TH HEAPUSAGE "1" "June 2026" "heapusage v2.38" "User Commands"
 .SH NAME
 heapusage \- find memory leaks in applications
 .SH SYNOPSIS

src/hulog.cpp

@@ -316,7 +316,7 @@ void log_event(int event, void* ptr, size_t size)
 
                 log_print_callstack(f, callstack_depth, callstack);
 
-                fprintf(f, "%s Address %p is a block of size %ld free'd at:\n",
+                fprintf(f, "%s Address %p is a block of size %zu free'd at:\n",
                         hu_prefix, ptr, allocation->second.size);
 
                 log_print_callstack(f, allocation->second.free_callstack_depth,
@@ -378,7 +378,7 @@ void hu_sig_handler(int sig, siginfo_t* si, void* /*ucontext*/)
             found = true;
             size_t offset = (char*)ptr - ((char*)allocation->second.ptr + allocation->second.size);
 
-            fprintf(f, "%s Address %p is %ld bytes after a block of size %ld alloc'd at:\n",
+            fprintf(f, "%s Address %p is %zu bytes after a block of size %zu alloc'd at:\n",
                     hu_prefix, ptr, offset, allocation->second.size);
 
             log_print_callstack(f, allocation->second.callstack_depth, allocation->second.callstack);
@@ -397,7 +397,7 @@ void hu_sig_handler(int sig, siginfo_t* si, void* /*ucontext*/)
               found = true;
               size_t offset = (char*)ptr - ((char*)allocation->second.ptr + allocation->second.size);
 
-              fprintf(f, "%s Address %p is %ld bytes after a block of size %ld free'd at:\n",
+              fprintf(f, "%s Address %p is %zu bytes after a block of size %zu free'd at:\n",
                       hu_prefix, ptr, offset, allocation->second.size);
 
               log_print_callstack(f, allocation->second.free_callstack_depth,
@@ -413,7 +413,7 @@ void hu_sig_handler(int sig, siginfo_t* si, void* /*ucontext*/)
               found = true;
               size_t offset = (char*)ptr - ((char*)allocation->second.ptr);
 
-              fprintf(f, "%s Address %p is %ld bytes inside a block of size %ld free'd at:\n",
+              fprintf(f, "%s Address %p is %zu bytes inside a block of size %zu free'd at:\n",
                       hu_prefix, ptr, offset, allocation->second.size);
 
               log_print_callstack(f, allocation->second.free_callstack_depth,

src/humalloc.cpp

@@ -11,6 +11,7 @@
 /* ----------- Includes ------------------------------------------ */
 #include <atomic>
 #include <cassert>
+#include <cinttypes>
 #include <cstring>
 #include <iostream>
 #include <fstream>
@@ -103,7 +104,7 @@ static int hu_mprotect(void* addr, size_t len, int prot)
   int rv = mprotect(addr, len, prot);
   if (rv != 0)
   {
-    fprintf(stderr, "heapusage error: mprotect(%p, %ld, %d) failed errno %d\n",
+    fprintf(stderr, "heapusage error: mprotect(%p, %zu, %d) failed errno %d\n",
             addr, len, prot, errno);
 
 #if defined(__linux__)
@@ -117,9 +118,9 @@ static int hu_mprotect(void* addr, size_t len, int prot)
     if (callcount > (max_map_count / 2))
     {
       fprintf(stderr,
-              "max_map_count=%ld mprotect_count=%ld, try increasing max_map_count, ex:\n",
+              "max_map_count=%" PRIu64 " mprotect_count=%" PRIu64 ", try increasing max_map_count, ex:\n",
               max_map_count, callcount);
-      fprintf(stderr, "sudo sh -c \"echo %ld > /proc/sys/vm/max_map_count\"\n",
+      fprintf(stderr, "sudo sh -c \"echo %" PRIu64 " > /proc/sys/vm/max_map_count\"\n",
               (2 * max_map_count));
       exit(1);
     }