diff --git a/build.lua b/build.lua
index 3476efaec..f182020b2 100644
--- a/build.lua
+++ b/build.lua
@@ -9,7 +9,7 @@ vars.plats = {
 	"cpm",
 	"linux386",
 	"linux68k",
---	"linuxppc",
+	"linuxppc",
 --	"osx386",
 --	"osxppc",
 --	--"qemuppc",
@@ -21,7 +21,7 @@ vars.plats = {
 vars.plats_with_tests = {
 	"linux68k",
 	"linux386",
---	"linuxppc",
+	"linuxppc",
 --	--"qemuppc",
 --	"pc86",
 }
diff --git a/lang/cem/libcc.ansi/headers/unistd.h b/lang/cem/libcc.ansi/headers/unistd.h
index 374a42070..8818fa66e 100644
--- a/lang/cem/libcc.ansi/headers/unistd.h
+++ b/lang/cem/libcc.ansi/headers/unistd.h
@@ -50,6 +50,8 @@
                                     (not including real-time signals).  */
     typedef void (*sighandler_t)(int);
     typedef uint16_t sigset_t;
+
+    struct sigaction;
 #else
     #include <ack/signal.h>
 #endif
@@ -86,6 +88,7 @@ extern int kill(pid_t old, int sig);
 extern int open(const char* path, int access, ...);
 extern int raise(int signum);
 extern int settimeofday(const struct timeval* tv, const struct timezone* tz);
+extern int sigaction(int, const struct sigaction *, struct sigaction *);
 extern int sigprocmask(int, const sigset_t *, sigset_t *);
 extern int unlink(const char* path);
 extern off_t lseek(int fildes, off_t offset, int whence);
diff --git a/plat/linux/include/ack/signal.h b/plat/linux/include/ack/signal.h
index 1f41234b6..d7ec086b2 100644
--- a/plat/linux/include/ack/signal.h
+++ b/plat/linux/include/ack/signal.h
@@ -56,4 +56,21 @@ typedef unsigned long sigset_t;
 
 typedef void (*sighandler_t)(int);
 
+/* sa_flags */
+#define SA_NODEFER      0x40000000UL
+#define SA_RESETHAND    0x80000000UL
+
+struct __siginfo;
+struct sigaction {
+	union {
+		void (*__sa_handler)(int);
+		void (*__sa_sigaction)(int, struct __siginfo *, void *);
+	} __sigaction_u;
+	sigset_t sa_mask;
+	unsigned long sa_flags;
+	void (*sa_restorer)(void);
+};
+#define sa_handler __sigaction_u.__sa_handler
+#define sa_sigaction __sigaction_u.__sa_sigaction
+
 #endif
diff --git a/plat/linuxppc/include/ack/plat.h b/plat/linuxppc/include/ack/plat.h
deleted file mode 100644
index 9145197c4..000000000
--- a/plat/linuxppc/include/ack/plat.h
+++ /dev/null
@@ -1,14 +0,0 @@
-/* $Source: /cvsroot/tack/Ack/plat/linux386/include/ack/config.h,v $
- * $State: Exp $
- * $Revision: 1.1 $
- */
-
-#ifndef _ACK_PLAT_H
-#define _ACK_PLAT_H
-
-/* We're providing a time() system call rather than wanting a wrapper around
- * gettimeofday() in the libc. */
- 
-/* #define ACKCONF_TIME_IS_A_SYSCALL */
-
-#endif
diff --git a/plat/linuxppc/include/build.lua b/plat/linuxppc/include/build.lua
index 5fef69c6e..8adc0c7d1 100644
--- a/plat/linuxppc/include/build.lua
+++ b/plat/linuxppc/include/build.lua
@@ -4,13 +4,15 @@ headermap = {}
 packagemap = {}
 
 local function addheader(h)
-	headermap[h] = "./"..h
-	packagemap["$(PLATIND)/linuxppc/include/"..h] = "./"..h
+	headermap[h] = "plat/linux/include/"..h
+	packagemap["$(PLATIND)/linuxppc/include/"..h] = "plat/linux/include/"..h
 end
 
 addheader("ack/plat.h")
+addheader("ack/fcntl.h")
+addheader("ack/signal.h")
 addheader("sys/ioctl.h")
-addheader("unistd.h")
+addheader("sys/types.h")
 
 acklibrary {
 	name = "headers",
@@ -22,3 +24,5 @@ installable {
 	map = packagemap
 }
 
+
+
diff --git a/plat/linuxppc/include/sys/ioctl.h b/plat/linuxppc/include/sys/ioctl.h
deleted file mode 100644
index af41165d7..000000000
--- a/plat/linuxppc/include/sys/ioctl.h
+++ /dev/null
@@ -1,76 +0,0 @@
-/* $Source: /cvsroot/tack/Ack/plat/linux386/include/sys/ioctl.h,v $
- * $State: Exp $
- * $Revision: 1.1 $
- */
-
-#ifndef _SYS_IOCTL_H
-#define _SYS_IOCTL_H
-
-/* These are copied from the ioctl_list(2) man page. */
- 
-/* <include/asm-i386/socket.h> */
-
-#define FIOSETOWN 0x00008901
-#define SIOCSPGRP 0x00008902
-#define FIOGETOWN 0x00008903
-#define SIOCGPGRP 0x00008904
-#define SIOCATMARK 0x00008905
-#define SIOCGSTAMP 0x00008906
-
-/* <include/asm-i386/termios.h> */
-
-#define TCGETS 0x00005401
-#define TCSETS 0x00005402
-#define TCSETSW 0x00005403
-#define TCSETSF 0x00005404
-#define TCGETA 0x00005405
-#define TCSETA 0x00005406
-#define TCSETAW 0x00005407
-#define TCSETAF 0x00005408
-#define TCSBRK 0x00005409
-#define TCXONC 0x0000540A
-#define TCFLSH 0x0000540B
-#define TIOCEXCL 0x0000540C
-#define TIOCNXCL 0x0000540D
-#define TIOCSCTTY 0x0000540E
-#define TIOCGPGRP 0x0000540F
-#define TIOCSPGRP 0x00005410
-#define TIOCOUTQ 0x00005411
-#define TIOCSTI 0x00005412
-#define TIOCGWINSZ 0x00005413
-#define TIOCSWINSZ 0x00005414
-#define TIOCMGET 0x00005415
-#define TIOCMBIS 0x00005416
-#define TIOCMBIC 0x00005417
-#define TIOCMSET 0x00005418
-#define TIOCGSOFTCAR 0x00005419
-#define TIOCSSOFTCAR 0x0000541A
-#define FIONREAD 0x0000541B
-#define TIOCINQ 0x0000541B
-#define TIOCLINUX 0x0000541C
-#define TIOCCONS 0x0000541D
-#define TIOCGSERIAL 0x0000541E
-#define TIOCSSERIAL 0x0000541F
-#define TIOCPKT 0x00005420
-#define FIONBIO 0x00005421
-#define TIOCNOTTY 0x00005422
-#define TIOCSETD 0x00005423
-#define TIOCGETD 0x00005424
-#define TCSBRKP 0x00005425
-#define TIOCTTYGSTRUCT 0x00005426
-#define FIONCLEX 0x00005450
-#define FIOCLEX 0x00005451
-#define FIOASYNC 0x00005452
-#define TIOCSERCONFIG 0x00005453
-#define TIOCSERGWILD 0x00005454
-#define TIOCSERSWILD 0x00005455
-#define TIOCGLCKTRMIOS 0x00005456
-#define TIOCSLCKTRMIOS 0x00005457
-#define TIOCSERGSTRUCT 0x00005458
-#define TIOCSERGETLSR 0x00005459
-#define TIOCSERGETMULTI 0x0000545A
-#define TIOCSERSETMULTI 0x0000545B
-
-
-
-#endif
diff --git a/plat/linuxppc/include/unistd.h b/plat/linuxppc/include/unistd.h
deleted file mode 100644
index f57705365..000000000
--- a/plat/linuxppc/include/unistd.h
+++ /dev/null
@@ -1,151 +0,0 @@
-/*
- * unistd.h - standard system calls
- */
-/* $Id$ */
-
-#ifndef _UNISTD_H
-#define _UNISTD_H
-
-#include <stddef.h>
-#include <time.h>
-
-/* Types */
-
-typedef int pid_t;
-typedef int mode_t;
-
-typedef long suseconds_t;
-
-/* Time handling. */
-
-struct timeval
-{
-	time_t tv_sec;
-	suseconds_t tv_usec;
-};
-
-struct timezone
-{
-	int tz_minuteswest;
-	int tz_dsttime;
-}; /* obsolete, unused */
-
-extern int gettimeofday(struct timeval* tv, struct timezone* tz);
-extern int settimeofday(const struct timeval* tv, const struct timezone* tz);
-
-/* File access. */
-
-enum
-{
-	O_ACCMODE = 0x3,
-	
-	O_RDONLY = 0,
-	O_WRONLY = 1,
-	O_RDWR = 2,
-	
-	O_CREAT = 0x10,
-	O_TRUNC = 0x20,
-	O_APPEND = 0x40
-};
-
-extern int open(const char* path, int access, ...);
-extern int creat(const char* path, mode_t mode);
-extern int close(int d);
-extern int read(int fd, void* buffer, size_t count);
-extern int write(int fd, void* buffer, size_t count);
-extern off_t lseek(int fildes, off_t offset, int whence);
-extern int fcntl(int fd, int op, ...);
-extern int unlink(const char* path);
-
-/* Special variables */
-
-extern char** environ;
-
-/* Implemented system calls */
-
-extern void _exit(int);
-extern pid_t getpid(void);
-extern int brk(void* ptr);
-extern void* sbrk(int increment);
-extern int isatty(int d);
-extern int execve(const char *path, char *const argv[], char *const envp[]);
-
-/* Signal handling */
-
-typedef int sig_atomic_t;
-
-#define SIG_ERR ((sighandler_t) -1)           /* Error return.  */
-#define SIG_DFL ((sighandler_t) 0)            /* Default action.  */
-#define SIG_IGN ((sighandler_t) 1)            /* Ignore signal.  */
-
-#define SIGHUP          1       /* Hangup (POSIX).  */
-#define SIGINT          2       /* Interrupt (ANSI).  */
-#define SIGQUIT         3       /* Quit (POSIX).  */
-#define SIGILL          4       /* Illegal instruction (ANSI).  */
-#define SIGTRAP         5       /* Trace trap (POSIX).  */
-#define SIGABRT         6       /* Abort (ANSI).  */
-#define SIGIOT          6       /* IOT trap (4.2 BSD).  */
-#define SIGBUS          7       /* BUS error (4.2 BSD).  */
-#define SIGFPE          8       /* Floating-point exception (ANSI).  */
-#define SIGKILL         9       /* Kill, unblockable (POSIX).  */
-#define SIGUSR1         10      /* User-defined signal 1 (POSIX).  */
-#define SIGSEGV         11      /* Segmentation violation (ANSI).  */
-#define SIGUSR2         12      /* User-defined signal 2 (POSIX).  */
-#define SIGPIPE         13      /* Broken pipe (POSIX).  */
-#define SIGALRM         14      /* Alarm clock (POSIX).  */
-#define SIGTERM         15      /* Termination (ANSI).  */
-#define SIGSTKFLT       16      /* Stack fault.  */
-#define SIGCLD          SIGCHLD /* Same as SIGCHLD (System V).  */
-#define SIGCHLD         17      /* Child status has changed (POSIX).  */
-#define SIGCONT         18      /* Continue (POSIX).  */
-#define SIGSTOP         19      /* Stop, unblockable (POSIX).  */
-#define SIGTSTP         20      /* Keyboard stop (POSIX).  */
-#define SIGTTIN         21      /* Background read from tty (POSIX).  */
-#define SIGTTOU         22      /* Background write to tty (POSIX).  */
-#define SIGURG          23      /* Urgent condition on socket (4.2 BSD).  */
-#define SIGXCPU         24      /* CPU limit exceeded (4.2 BSD).  */
-#define SIGXFSZ         25      /* File size limit exceeded (4.2 BSD).  */
-#define SIGVTALRM       26      /* Virtual alarm clock (4.2 BSD).  */
-#define SIGPROF         27      /* Profiling alarm clock (4.2 BSD).  */
-#define SIGWINCH        28      /* Window size change (4.3 BSD, Sun).  */
-#define SIGPOLL         SIGIO   /* Pollable event occurred (System V).  */
-#define SIGIO           29      /* I/O now possible (4.2 BSD).  */
-#define SIGPWR          30      /* Power failure restart (System V).  */
-#define SIGSYS          31      /* Bad system call.  */
-#define SIGUNUSED       31
-
-#define _NSIG           32      /* Biggest signal number + 1
-                                   (not including real-time signals).  */
-
-/* sigprocmask */
-#define SIG_BLOCK       0
-#define SIG_UNBLOCK     1
-#define SIG_SETMASK     2
-typedef unsigned long sigset_t;
-
-/* sa_flags */
-#define SA_NODEFER      0x40000000UL
-#define SA_RESETHAND    0x80000000UL
-
-struct __siginfo;
-struct sigaction {
-	union {
-		void (*__sa_handler)(int);
-		void (*__sa_sigaction)(int, struct __siginfo *, void *);
-	} __sigaction_u;
-	sigset_t sa_mask;
-	unsigned long sa_flags;
-	void (*sa_restorer)(void);
-};
-#define sa_handler __sigaction_u.__sa_handler
-#define sa_sigaction __sigaction_u.__sa_sigaction
-
-typedef void (*sighandler_t)(int);
-extern int sigaction(int, const struct sigaction *, struct sigaction *);
-extern sighandler_t signal(int signum, sighandler_t handler);
-extern int sigprocmask(int, const sigset_t *, sigset_t *);
-extern int raise(int signum);
-
-
-
-#endif