documentation/Doxyfile: adapt for Sphinx Breathe

Co-authored-by: Timo Korhonen <timo.korhonen@ess.eu>

documentation/Doxyfile@

@@ -759,10 +759,10 @@ WARN_LOGFILE           =
 # spaces.
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = ../mainpage.dox \
-                         ../RELEASE_NOTES.md \
+INPUT                  = ../RELEASE_NOTES.md \
                          ../README.md \
-                         @TOP@/include
+                         @TOP@/include \
+                         @TOP@/doc
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
@@ -1833,7 +1833,7 @@ MAN_LINKS              = NO
 # captures the structure of the code including all documentation.
 # The default value is: NO.
 
-GENERATE_XML           = NO
+GENERATE_XML           = YES
 
 # The XML_OUTPUT tag is used to specify where the XML pages will be put. If a
 # relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
@@ -1841,7 +1841,7 @@ GENERATE_XML           = NO
 # The default directory is: xml.
 # This tag requires that the tag GENERATE_XML is set to YES.
 
-XML_OUTPUT             = xml
+XML_OUTPUT             = rtd-src/xml
 
 # If the XML_PROGRAMLISTING tag is set to YES doxygen will dump the program
 # listings (including syntax highlighting and cross-referencing information) to
@@ -1946,7 +1946,7 @@ ENABLE_PREPROCESSING   = YES
 # The default value is: NO.
 # This tag requires that the tag ENABLE_PREPROCESSING is set 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
@@ -1986,7 +1986,17 @@ INCLUDE_FILE_PATTERNS  =
 # recursively expanded use the := operator instead of the = operator.
 # This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
 
-PREDEFINED             = __cplusplus
+PREDEFINED             = __cplusplus \
+                         LIBCOM_API \
+                         DBCORE_API \
+                         LIBCA_API \
+                         DBRECSTD_API \
+                         EPICS_ALWAYS_INLINE \
+                         epicsShareExtern \
+                         epicsShareClass \
+                         epicsShareFunc \
+                         epicsShareAPI \
+                         epicsStdCall
 
 # 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. The