Start untangling header inclusion in a way that does not affect

build times - tested, there is no measureable difference before and
after this commit.

In this change:

use asterisk/compat.h to include a small set of system headers:
inttypes.h, unistd.h, stddef.h, stddint.h, sys/types.h, stdarg.h,
stdlib.h, alloca.h, stdio.h

Where available, the inclusion is conditional on HAVE_FOO_H as determined
by autoconf.

Normally, source files should not include any of the above system headers,
and instead use either "asterisk.h" or "asterisk/compat.h" which does it
better. 

For the time being I have left alone second-level directories
(main/db1-ast, etc.).



git-svn-id: http://svn.digium.com/svn/asterisk/trunk@89333 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 34 insertions, 1 deletions

diff --git a/include/asterisk/compat.h b/include/asterisk/compat.h
index 838e24e47..7e019e064 100644
--- a/include/asterisk/compat.h
+++ b/include/asterisk/compat.h
@@ -11,16 +11,49 @@
 
 /*! \file
  * \brief General Definitions for Asterisk top level program
+ * Included by asterisk.h to handle platform-specific issues
+ * especially those related to header files.
  */
 
 #ifndef _COMPAT_H
 #define _COMPAT_H
 
-#include "asterisk/autoconfig.h"
+#ifdef HAVE_INTTYPES_H
 #include <inttypes.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef HAVE_STDDEF_H
+#include <stddef.h>
+#endif
+
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
+#endif
+
+#ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>
+#endif
+
 #include <stdarg.h>
 
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#ifdef HAVE_ALLOCA_H
+#include <alloca.h>	/* not necessarily present - could be in stdlib */
+#endif
+
+#include <stdio.h>	/* this is always present */
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
 #if !defined(HAVE_ASPRINTF) && !defined(__AST_DEBUG_MALLOC)
 int asprintf(char **str, const char *fmt, ...);
 #endif