man: Ignore UNUSED attribute macros on parameters for doxygen docs (#6128)

Author: echoix

include/Make/Doxyfile_arch_html.in

@@ -2211,7 +2211,7 @@ 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
@@ -2251,11 +2251,14 @@ 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             = HAVE_OGR \
-                         HAVE_TIFFIO_H \
-                         HAVE_GEOS \
+PREDEFINED             = HAVE_GEOS \
+                         HAVE_LIBBLAS \
                          HAVE_LIBLAPACK \
-                         HAVE_LIBBLAS
+                         HAVE_OGR \
+                         HAVE_TIFFIO_H \
+                         NOPG_UNUSED= \
+                         NO_NLS_UNUSED= \
+                         UNUSED=
 
 # 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

include/Make/Doxyfile_arch_latex.in

@@ -2211,7 +2211,7 @@ 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
@@ -2251,11 +2251,14 @@ 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             = HAVE_OGR \
-                         HAVE_TIFFIO_H \
-                         HAVE_GEOS \
+PREDEFINED             = HAVE_GEOS \
+                         HAVE_LIBBLAS \
                          HAVE_LIBLAPACK \
-                         HAVE_LIBBLAS
+                         HAVE_OGR \
+                         HAVE_TIFFIO_H \
+                         NOPG_UNUSED= \
+                         NO_NLS_UNUSED= \
+                         UNUSED=
 
 # 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