gdb aix4.1.5 build failure

[Philippe De Muyter]

For some days now, gdb does not compile anymore on aix4.1.5 :

gcc -c -g -O2    -I. -I/src/gdb -I/src /gdb/config -DHAVE_CONFIG_H
-I/src/gdb/../include/opcode -I/src/gdb/../readline/.. -I../bfd
-I/src/gdb/../bfd  -I/src/gdb/../include -I../intl -I/src/gdb/../intl
-I/src/gdb/tui  -Wimplicit -Wreturn-type -Wcomment -Wtrigraphs -Wformat
-Wparentheses -Wpointer-arith  /src/gdb/rs6000-nat.c
In file included from /usr/include/a.out.h:28,
                 from /usr/include/sys/user.h:55,
                 from /src/gdb/rs6000-nat.c:38:
/src/gdb/../bfd/xcoff.h:127: warning: `struct internal_reloc' declared inside parameter list
/src/gdb/../bfd/xcoff.h:127: warning: its scope is only this definition or declaration,
/src/gdb/../bfd/xcoff.h:127: warning: which is probably not what you want.
/src/gdb/../bfd/coffswap.h: In function `coff_swap_reloc_in':
In file included from /src/gdb/../bfd/coffcode.h:310,
                 from /src/gdb/../bfd/xcoff.h:151,
                 from /usr/include/a.out.h:28,
                 from /usr/include/sys/user.h:55,
                 from /src/gdb/rs6000-nat.c:38:
/src/gdb/../bfd/coffswap.h:229: `RELOC' undeclared (first use this function)
/src/gdb/../bfd/coffswap.h:229: (Each undeclared identifier is reported only once
/src/gdb/../bfd/coffswap.h:229: for each function it appears in.)