hi, solaris >= 10 cares much more about the
_XOPEN_SOURCE* definitions. compilation fails if you
simply set _XOPEN_SOURCE_EXTENDED to 1 (some wide stuff
is not "seen" anymore, because it assumes _XPG4_2, even
if you set _XOPEN_SOURCE to 500)! (simple) solution:
===
diff -r -u aspell-0.60.4.orig/prog/check_funs.cpp
aspell-0.60.4/prog/check_funs.cpp
--- aspell-0.60.4.orig/prog/check_funs.cpp
2005-06-19 14:25:01.000000000 +0200
+++ aspell-0.60.4/prog/check_funs.cpp 2006-06-12
04:54:14.843145200 +0200
@@ -19,7 +19,7 @@
#include "settings.h"

#ifdef DEFINE_XOPEN_SOURCE_EXTENDED
-# define _XOPEN_SOURCE_EXTENDED 1
+# define _XOPEN_SOURCE_EXTENDED
#endif

#ifdef CURSES_NON_POSIX

another problem is gcc-4.1 (i guess this has been
reported already). anyway, here's my fix:
===
--- aspell-0.60.4.orig/modules/filter/nroff.cpp
2005-02-20 22:49:18.000000000 +0100
+++ aspell-0.60.4/modules/filter/nroff.cpp
2006-06-11 00:45:30.000000000 +0200
@@ -73,7 +73,7 @@
return false;
}

- bool NroffFilter::process_char (FilterChar::Chr c);
+ bool process_char (FilterChar::Chr c);

public:

===

using this 2 fixes i can compile successfully using
gcc-4.1.1/binutils-2.17.50.0.2 on linux/x86,
linux/x86_64, solaris8/9/10/sparc.

rds, niki