build issue with gtk20

[Steven Friedrich]

I am trying to upgrade gtk20 per instructions in /usr/ports/UPDATING, the
new version won't build.

Here's the tail end of the log:
/usr/include/machine/endian.h:107: syntax error, unexpected '{' in ' return
(__extension__ ({ register __uint32_t __X = (_x); __asm ("bswap %0" : "+r"
(__X)); __X; }));' at '{'
/usr/include/machine/endian.h:107: syntax error, unexpected ';' in ' return
(__extension__ ({ register __uint32_t __X = (_x); __asm ("bswap %0" : "+r"
(__X)); __X; }));' at ';'
g-ir-scanner: compile: cc -D_REENTRANT -I/usr/local/include/glib-2.0
-DGDK_PIXBUF_DISABLE_DEPRECATED -O2 -fno-strict-aliasing -pipe
-march=pentium4 -Wall -I.. -I../gtk -I.. -I../gdk -I../gdk
-I/usr/local/include/glib-2.0 -I/usr/local/include/pango-1.0
-I/usr/local/include/cairo -I/usr/local/include/pixman-1
-I/usr/local/include -I/usr/local/include/freetype2
-I/usr/local/include/gio-unix-2.0/ -I/usr/local/include/gdk-pixbuf-2.0
-I/usr/local/include/atk-1.0 -I/usr/local/include/glib-2.0
-I/usr/local/include/freetype2 -I/usr/local/include
-I/usr/local/include/gio-unix-2.0/ -I/usr/local/include/atk-1.0
-I/usr/local/include/cairo -I/usr/local/include/pixman-1 -c -o
/usr/ports/x11-toolkits/gtk20/work/gtk+-2.24.5/gtk/tmp-introspectCCtzqi/Gtk-2.0.o
/usr/ports/x11-toolkits/gtk20/work/gtk+-2.24.5/gtk/tmp-introspectCCtzqi/Gtk-2.0.c
g-ir-scanner: link: /bin/sh /usr/ports/x11-toolkits/gtk20/work/gnome-libtool
--mode=link --tag=CC --silent cc -o
/usr/ports/x11-toolkits/gtk20/work/gtk+-2.24.5/gtk/tmp-introspectCCtzqi/Gtk-2.0
-export-dynamic -DGDK_PIXBUF_DISABLE_DEPRECATED -O2 -fno-strict-aliasing
-pipe -march=pentium4 -Wall -L. -L/usr/local/lib libgtk-x11-2.0.la -pthread
-L/usr/local/lib -lgio-2.0 -lgobject-2.0 -lgmodule-2.0 -lgthread-2.0
-lglib-2.0
/usr/ports/x11-toolkits/gtk20/work/gtk+-2.24.5/gtk/tmp-introspectCCtzqi/Gtk-2.0.o
gtkscalebutton.c:544: Warning: Gtk: invalid annotation option: int
gtkwidget.c:6462: Warning: Gtk: gtk_widget_style_attach: unknown parameter
'widget' in documentation comment, should be 'style'
gtkpaned.c:2236: Warning: Gtk: gtk_paned_get_handle_window: unknown
parameter 'panede' in documentation comment, should be 'paned'
gtkruler.c:306: Warning: Gtk: gtk_ruler_get_metric: unknown parameter
'Deprecated' in documentation comment, should be 'ruler'
gtkruler.c:336: Warning: Gtk: gtk_ruler_set_range: unknown parameter
'Deprecated' in documentation comment, should be one of 'ruler', 'lower',
'upper', 'position', 'max_size'
gtkruler.c:387: Warning: Gtk: gtk_ruler_get_range: unknown parameter
'Deprecated' in documentation comment, should be one of 'ruler', 'lower',
'upper', 'position', 'max_size'
gtknotebook.c:7820: Warning: Gtk: gtk_notebook_set_group_name: unknown
parameter 'name' in documentation comment, should be one of 'notebook',
'group_name'
gtkvruler.c:76: Warning: Gtk: gtk_vruler_new: unknown parameter 'Deprecated'
in documentation comment
gtktextlayout.c:1002: Warning: Gtk: gtk_text_layout_validate_yrange: unknown
parameter 'anchor' in documentation comment, should be one of 'layout',
'anchor_line', 'y0_', 'y1_'
gtktextlayout.c:1123: Warning: Gtk: gtk_text_layout_validate: unknown
parameter 'tree' in documentation comment, should be one of 'layout',
'max_pixels'
Traceback (most recent call last):
  File "/usr/local/bin/g-ir-scanner", line 45, in <module>
    sys.exit(scanner_main(sys.argv))
  File "/usr/local/lib/gobject-introspection/giscanner/scannermain.py", line
411, in scanner_main
    main.transform()
  File "/usr/local/lib/gobject-introspection/giscanner/maintransformer.py",
line 100, in transform
    self._pair_function(node)
  File "/usr/local/lib/gobject-introspection/giscanner/maintransformer.py",
line 891, in _pair_function
    elif self._pair_method(func, subsymbol):
  File "/usr/local/lib/gobject-introspection/giscanner/maintransformer.py",
line 915, in _pair_method
    if first.type.ctype.count('*') != 1:
AttributeError: 'NoneType' object has no attribute 'count'
gmake[4]: *** [Gtk-2.0.gir] Error 1
gmake[4]: Leaving directory
`/usr/ports/x11-toolkits/gtk20/work/gtk+-2.24.5/gtk'
gmake[3]: *** [all-recursive] Error 1
gmake[3]: Leaving directory
`/usr/ports/x11-toolkits/gtk20/work/gtk+-2.24.5/gtk'
gmake[2]: *** [all] Error 2
gmake[2]: Leaving directory
`/usr/ports/x11-toolkits/gtk20/work/gtk+-2.24.5/gtk'
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory `/usr/ports/x11-toolkits/gtk20/work/gtk+-2.24.5'
gmake: *** [all] Error 2
*** Error code 1

Stop in /usr/ports/x11-toolkits/gtk20.