add doxygen docs for file version stuff

make doxygen expand __GNUC__ protected code blocks
make doxygen process include/asterisk.h


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@5871 65c4cc65-6c06-0410-ace0-fbb531ad65f3

contrib/asterisk-ng-doxygen

@@ -451,6 +451,7 @@ WARN_LOGFILE           =
 # with spaces.
 
 INPUT                  = ./ \
+			 include \
                          include/asterisk \
 			 channels \
 			 funcs \
@@ -962,13 +963,13 @@ ENABLE_PREPROCESSING   = YES
 # compilation will be performed. Macro expansion can be done in a controlled 
 # way by setting EXPAND_ONLY_PREDEF to YES.
 
-MACRO_EXPANSION        = NO
+MACRO_EXPANSION        = YES
 
 # If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES 
 # then the macro expansion is limited to the macros specified with the 
 # PREDEFINED and EXPAND_AS_PREDEFINED tags.
 
-EXPAND_ONLY_PREDEF     = NO
+EXPAND_ONLY_PREDEF     = YES
 
 # If the SEARCH_INCLUDES tag is set to YES (the default) the includes files 
 # in the INCLUDE_PATH (see below) will be search if a #include is found.
@@ -996,7 +997,7 @@ INCLUDE_FILE_PATTERNS  =
 # undefined via #undef or recursively expanded use the := operator 
 # instead of the = operator.
 
-PREDEFINED             = 
+PREDEFINED             = __GNUC__
 
 # If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then 
 # this tag can be used to specify a list of macro names that should be expanded. 

include/asterisk.h

@@ -54,9 +54,44 @@ extern void ast_channels_init(void);
 extern int dnsmgr_init(void);
 extern void dnsmgr_reload(void);
 
+/*!
+ * \brief Register the version of a source code file with the core.
+ * \param file the source file name
+ * \param version the version string (typically a CVS revision keyword string)
+ * \return nothing
+ *
+ * This function should not be called directly, but instead the
+ * ASTERISK_FILE_VERSION macro should be used to register a file with the core.
+ */
 void ast_register_file_version(const char *file, const char *version);
+
+/*!
+ * \brief Unregister a source code file from the core.
+ * \param file the source file name
+ * \return nothing
+ *
+ * This function should not be called directly, but instead the
+ * ASTERISK_FILE_VERSION macro should be used to automatically unregister
+ * the file when the module is unloaded.
+ */
 void ast_unregister_file_version(const char *file);
 
+/*!
+ * \brief Register/unregister a source code file with the core.
+ * \param file the source file name
+ * \param version the version string (typically a CVS revision keyword string)
+ *
+ * This macro will place a file-scope constructor and destructor into the
+ * source of the module using it; this will cause the version of this file
+ * to registered with the Asterisk core (and unregistered) at the appropriate
+ * times.
+ *
+ * Example:
+ *
+ * \code
+ * ASTERISK_FILE_VERSION(__FILE__, "\$Revision\$")
+ * \endcode
+ */
 #ifdef __GNUC__
 #define ASTERISK_FILE_VERSION(file, version) \
 	static void __attribute__((constructor)) __register_file_version(void) \