mark some more compat headers as IWYU export

not all compat/ headers are marked as exporting, 2 reasons:
- some compat define own symbols, like platform_semafore or aligned_malloc
(not _alloc as in C11)
- some headers are too generic to export all symbols, eg. unistd.h
or windows.h

Author: MartinPulec

src/compat/dlfunc.h

@@ -3,7 +3,7 @@
  * @author Martin Pulec     <[email protected]>
  */
 /*
- * Copyright (c) 2011-2022 CESNET, z. s. p. o.
+ * Copyright (c) 2011-2025 CESNET, zájmové sdružení právnických osob
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -47,7 +47,7 @@
 #define dlclose FreeLibrary
 EXTERN_C const char *dlerror(void);
 #else // ! defined _WIN32
-#include <dlfcn.h>
+#include <dlfcn.h> // IWYU pragma: export
 #define LIB_HANDLE void *
 #define FARPROC void *
 #endif // defined _WIN32

src/compat/endian.h

@@ -100,7 +100,7 @@
         #endif
 
 #else
-        #include <endian.h>
+        #include <endian.h> // IWYU pragma: export
 #endif
 
 #endif // defined COMPAT_ENDIAN_H_A5D7C443_895D_465E_A46D_BF5E6DAA833F

src/compat/net.h

@@ -41,6 +41,7 @@
 #ifndef COMPAT_NET_H_EF7499D8_4939_4F86_A585_2EED8221D056
 #define COMPAT_NET_H_EF7499D8_4939_4F86_A585_2EED8221D056
 
+// IWYU pragma: begin_exports
 #ifdef _WIN32
 #include <winsock2.h>
 typedef SOCKET fd_t;
@@ -52,5 +53,6 @@ typedef SOCKET fd_t;
 typedef int fd_t;
 #define INVALID_SOCKET (-1)
 #endif
+// IWYU pragma: end_exports
 
 #endif // defined COMPAT_NET_H_EF7499D8_4939_4F86_A585_2EED8221D056

src/compat/time.h

@@ -5,7 +5,7 @@
  * time-related compatibility header
  */
 /*
- * Copyright (c) 2024 CESNET
+ * Copyright (c) 2024-2025 CESNET, zájmové sdružení právnických osob
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -40,7 +40,7 @@
 #ifndef COMPAT_MISC_H_7C0E2D4B_7D55_4107_918B_7BF2BEB92428
 #define COMPAT_MISC_H_7C0E2D4B_7D55_4107_918B_7BF2BEB92428
 
-#include <time.h>
+#include <time.h>  // IWYU pragma: export
 
 #ifndef __STDC_LIB_EXT1__
 #ifdef _WIN32