linux build prob

Getting lots of strange errors:

first error (jam -q haiku-image):

...failed C++ generated/objects/linux/x86/release/tools/rc/compile.o ...
...skipped <build>librdef.a for lack of <build>librdef.a(compile.o)...
...skipped <build>rc for lack of <build>librdef.a...
...skipped <HaikuImage>haiku.image-init-vars for lack of <build>rc...
...skipped haiku.image for lack of <HaikuImage>haiku.image-init-vars...
...failed updating 1 target(s)...
...skipped 4 target(s)...
...updated 2 target(s)...

and lots of:

don't know how to make <src!tests!add-ons!kernel!file_systems!udf!udf_shell>fsh.c
don't know how to make <src!tests!add-ons!kernel!file_systems!udf!udf_shell>external_commands.cpp
don't know how to make <src!tests!add-ons!kernel!network!core>cksum.c
don't know how to make <src!tests!add-ons!kernel!network!core>core.c
don't know how to make <src!tests!add-ons!kernel!network!core>if.c
don't know how to make <src!tests!add-ons!kernel!network!core>ifq.c
don't know how to make <src!tests!add-ons!kernel!network!core>in.c
don't know how to make <src!tests!add-ons!kernel!network!core>inpcb.c
don't know how to make <src!tests!add-ons!kernel!network!core>mbuf.c
don't know how to make <src!tests!add-ons!kernel!network!core>misc.c
don't know how to make <src!tests!add-ons!kernel!network!core>net_timer.c
don't know how to make <src!tests!add-ons!kernel!network!core>nhash.c
don't know how to make <src!tests!add-ons!kernel!network!core>pools.c
don't know how to make <src!tests!add-ons!kernel!network!core>radix.c
don't know how to make <src!tests!add-ons!kernel!network!core>route.c
don't know how to make <src!tests!add-ons!kernel!network!core>sockbuf.c
don't know how to make <src!tests!add-ons!kernel!network!core>socket.c
don't know how to make <src!tests!add-ons!kernel!network!interfaces!ethernet>ethernet.c
don't know how to make <src!tests!add-ons!kernel!network!interfaces!loopback>loopback.c
don't know how to make <src!tests!add-ons!kernel!network!interfaces!ppp>ppp.cpp
don't know how to make <src!tests!add-ons!kernel!network!interfaces!ppp>PPPManager.cpp
don't know how to make libbind.so
...patience...
don't know how to make <src!tests!add-ons!kernel!network!protocols!icmp>icmp.c
don't know how to make <src!tests!add-ons!kernel!network!protocols!ipv4>ipv4.c
don't know how to make <src!tests!add-ons!kernel!network!protocols!udp>udp.c
don't know how to make <src!tests!add-ons!kernel!network!protocols!tcp>tcp.c
don't know how to make <src!tests!add-ons!kernel!network!protocols!tcp>tcp_debug.c
don't know how to make <src!tests!add-ons!kernel!network!protocols!tcp>tcp_input.c
don't know how to make <src!tests!add-ons!kernel!network!protocols!tcp>tcp_output.c
don't know how to make <src!tests!add-ons!kernel!network!protocols!tcp>tcp_timer.c
don't know how to make <src!tests!add-ons!kernel!network!protocols!tcp>arc4random.c
don't know how to make <src!tests!add-ons!kernel!network!protocols!raw>raw.c
don't know how to make <src!tests!add-ons!kernel!network!protocols!route>route.c

etc, etc...

Using
Ubuntu 6.10
gcc version 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5)
Jam 2.5-haiku-20060813. OS=LINUX. Copyright 1993-2002 Christopher Seiwald.
doing a GCC2.95 haiku cross-tools build