diff '--color=auto' -ur libmicrohttpd-0.9.76/meson.build libmicrohttpd-0.9.76_patched/meson.build
--- libmicrohttpd-0.9.76/meson.build	2024-08-22 15:17:59.217715872 +0200
+++ libmicrohttpd-0.9.76_patched/meson.build	2024-08-22 15:20:23.755358647 +0200
@@ -126,7 +126,26 @@
 foreach s : sizes
   cdata.set('SIZEOF_@0@'.format(s.underscorify().to_upper()), cc.sizeof(s))
 endforeach
-cdata.set('SIZEOF_STRUCT_TIMEVAL_TV_SEC', cc.sizeof('time_t'))
+
+cdata.set(
+  'SIZEOF_STRUCT_TIMEVAL_TV_SEC',
+  cc.sizeof(
+    'test_var.tv_sec',
+    prefix: '''#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif /* HAVE_SYS_TIME_H */
+#ifdef HAVE_TIME_H
+#include <time.h>
+#endif /* HAVE_TIME_H */
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif /* HAVE_SYS_TYPES_H */
+#ifdef _WIN32
+#include <winsock.h>
+#endif /* _WIN32 */
+struct timeval test_var;'''
+  )
+)
 cdata.set('SIZEOF_UINT64_T', 8)
 
 cdata.set('HAVE_PIPE2_FUNC', cc.has_function('pipe2'))