powerpc64: maintain own linux/powerpc64 subdirectory

Most architectures supported by strace have their own subdirectory in
linux directory, but powerpc64 didn't, causing inconveniences.

* configure.ac (arch): Define to "powerpc64" on powerpc64.
* linux/powerpc/errnoent1.h: Move to linux/powerpc64/.
* linux/powerpc/ioctlent1.h: Likewise.
* linux/powerpc/signalent1.h: Likewise.
* linux/powerpc/syscallent1.h: Likewise.
* linux/powerpc64/ioctlent.h: New file.
* linux/powerpc64/syscallent.h: Likewise.
* linux/powerpc64/userent.h: Likewise.
* Makefile.am (EXTRA_DIST): Remove linux/powerpc/ioctlent1.h,
linux/powerpc/syscallent1.h, linux/powerpc/errnoent1.h, and
linux/powerpc/signalent1.h; added linux/powerpc64/errnoent1.h,
linux/powerpc64/ioctlent.h, linux/powerpc64/ioctlent1.h,
linux/powerpc64/signalent1.h, linux/powerpc64/syscallent.h,
linux/powerpc64/syscallent1.h, and linux/powerpc64/userent.h.

Makefile.am

@@ -218,13 +218,16 @@ EXTRA_DIST =				\
 	linux/or1k/syscallent.h		\
 	linux/or1k/userent.h		\
 	linux/personality.h		\
-	linux/powerpc/errnoent1.h	\
 	linux/powerpc/ioctlent.h.in	\
-	linux/powerpc/ioctlent1.h	\
-	linux/powerpc/signalent1.h	\
 	linux/powerpc/syscallent.h	\
-	linux/powerpc/syscallent1.h	\
 	linux/powerpc/userent.h		\
+	linux/powerpc64/errnoent1.h	\
+	linux/powerpc64/ioctlent.h	\
+	linux/powerpc64/ioctlent1.h	\
+	linux/powerpc64/signalent1.h	\
+	linux/powerpc64/syscallent.h	\
+	linux/powerpc64/syscallent1.h	\
+	linux/powerpc64/userent.h	\
 	linux/ptp_clock.h		\
 	linux/reboot.h			\
 	linux/s390/ioctlent.h.in	\

configure.ac

@@ -52,13 +52,12 @@ alpha*)
 	AC_DEFINE([ALPHA], 1, [Define for the Alpha architecture.])
 	;;
 powerpc*)
-	arch=powerpc
 	AC_DEFINE([POWERPC], 1, [Define for the PowerPC architecture.])
 	AC_TRY_COMPILE(
 [#ifndef __LP64__
 # error 32 bit
-#endif], [], ppc_bits=64, ppc_bits=32)
-	if test "$ppc_bits" = "64"; then
+#endif], [], arch=powerpc64, arch=powerpc)
+	if test "$arch" = "powerpc64"; then
 		AC_DEFINE([POWERPC64], 1, [Define for the PowerPC64 architecture.])
 	fi
 	;;

linux/powerpc/ioctlent1.h

@@ -1 +0,0 @@
-#include "ioctlent.h"

linux/powerpc/syscallent1.h

@@ -1 +0,0 @@
-#include "syscallent.h"

linux/powerpc64/ioctlent.h

@@ -0,0 +1 @@
+#include "../ioctlent.h"

linux/powerpc64/ioctlent1.h

@@ -0,0 +1 @@
+#include "../ioctlent.h"

linux/powerpc64/syscallent.h

@@ -0,0 +1 @@
+#include "powerpc/syscallent.h"

linux/powerpc64/syscallent1.h

@@ -0,0 +1 @@
+#include "powerpc/syscallent.h"

linux/powerpc64/userent.h

@@ -0,0 +1 @@
+#include "powerpc/userent.h"