debug failure on AIX

[David Edelsohn]

gcc -c   -g  -DIN_GCC   -W -Wall -Wwrite-strings -Wstrict-prototypes
-Wmissing-prototypes -pedantic -Wno-long-long -fno-common   -DHAVE_CONFIG_H
-I. -I. -I/gcc/dje/src/gcc -I/gcc/dje/src/gcc/. -I/gcc/dje/src/gcc/config
-I/gcc/dje/src/gcc /../include /gcc/dje/src/gcc/opts.c -o opts.o
/gcc/dje/src/gcc/opts.c: In function `common_handle_option':
/gcc/dje/src/gcc/opts.c:741: `flag_debug_only_used_symbols' undeclared
(first use in this function)
/gcc/dje/src/gcc/opts.c:741: (Each undeclared identifier is reported only once
/gcc/dje/src/gcc/opts.c:741: for each function it appears in.)
make[2]: *** [opts.o] Error 1