Thunar fails to compile with Sun Studio 11 compilers on Sparc Solaris 10

"thunar-vfs-io-local.c", line 185: syntax error before or at: if
"thunar-vfs-io-local.c", line 185: cannot recover from previous errors
cc: acomp failed for thunar-vfs-io-local.c
gmake[3]: *** [libthunar_vfs_1_la-thunar-vfs-io-local.lo] Error 1
gmake[3]: Leaving directory `/opt/pkg.obj/wip/xfce4-thunar/work.e450/Thunar-0.4.0rc1/thunar-vfs'
gmake[2]: *** [all] Error 2
gmake[2]: Leaving directory `/opt/pkg.obj/wip/xfce4-thunar/work.e450/Thunar-0.4.0rc1/thunar-vfs'
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory `/opt/pkg.obj/wip/xfce4-thunar/work.e450/Thunar-0.4.0rc1'
gmake: *** [all] Error 2
*** Error code 2

Stop.
bmake: stopped in /opt/pkgsrc/wip/xfce4-thunar
*** Error code 1