a bunch of files in gdb use a-z in sed expressions without forcing the locale 
to c ... in some locales, this can cause some pretty "fun" results:

(observer.sh)
In file included from solib.c:47:
observer.h:35: error: stray '@' in program
observer.h:35: error: expected ')' before 'deftypefun'

(Makefile.in:init.c)
libgdb.a(init.o): In function `initialize_all_files':
init.c:(.text+0xa): undefined reference to `_initialize_amd64_lin'
init.c:(.text+0xf): undefined reference to `_initialize_i386_'

i've fixed this issue in the Makefile.in, gdb_indent.sh, gdb_mbuild,sh, and 
observer.sh files the same way that gdbarch.sh was fixed oh-so-long ago 
rather than the over-the-top way that autoconf does it (see the top of 
gdb/configure under "NLS nuisances" to see what i mean)
-mike