Build System: Support include-what-you-use.

ASTERISK-25591 #close

Change-Id: I8d3efa0826142ece9cbed2fd0d46f3b607fee6ae

configure

@@ -13653,7 +13653,7 @@ else
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -13699,7 +13699,7 @@ else
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -13723,7 +13723,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -13768,7 +13768,7 @@ else
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -13792,7 +13792,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];

configure.ac

@@ -218,17 +218,13 @@ if test ! x"${UNAME}" = xNo; then
 fi
 AC_SUBST(PBX_OSREV)
 
-AH_TOP(
-#ifndef ASTERISK_AUTOCONFIG_H
+AH_TOP([#ifndef ASTERISK_AUTOCONFIG_H
 #define ASTERISK_AUTOCONFIG_H
+/* IWYU pragma: private, include "asterisk.h" */
 
-#include "asterisk/buildopts.h"
+#include "asterisk/buildopts.h" /* IWYU pragma: export */])
 
-)
-
-AH_BOTTOM(
-#endif
-)
+AH_BOTTOM([#endif	/* ASTERISK_AUTOCONFIG_H */])
 
 # cross-compile checks
 if test "${cross_compiling}" = "yes";

include/asterisk/astmm.h

@@ -30,6 +30,7 @@ extern "C" {
 
 #ifndef _ASTERISK_ASTMM_H
 #define _ASTERISK_ASTMM_H
+/* IWYU pragma: private, include "asterisk/utils.h" */
 
 #ifndef STANDALONE
 

include/asterisk/autoconfig.h.in

@@ -2,10 +2,9 @@
 
 #ifndef ASTERISK_AUTOCONFIG_H
 #define ASTERISK_AUTOCONFIG_H
+/* IWYU pragma: private, include "asterisk.h" */
 
-#include "asterisk/buildopts.h"
-
-
+#include "asterisk/buildopts.h" /* IWYU pragma: export */
 
 /* Define to 1 if internal poll should be used. */
 #undef AST_POLL_COMPAT
@@ -1381,4 +1380,4 @@
    code using `volatile' can become incorrect without. Disable with care. */
 #undef volatile
 
-#endif
+#endif	/* ASTERISK_AUTOCONFIG_H */

include/asterisk/compat.h

@@ -15,10 +15,12 @@
  * especially those related to header files.
  */
 
-#include "asterisk/compiler.h"
-
 #ifndef _COMPAT_H
 #define _COMPAT_H
+/* IWYU pragma: private, include "asterisk.h" */
+/* IWYU pragma: begin_exports */
+
+#include "asterisk/compiler.h"
 
 #ifndef __STDC_VERSION__
 /* flex output wants to find this defined. */
@@ -231,5 +233,5 @@ float roundf(float x);
 #ifndef NAN
 #define NAN (0.0/0.0)
 #endif
-
+/* IWYU pragma: end_exports */
 #endif