[PATCH] arm, provide ftruncate() and truncate() stubs.

[Marcus Shawcroft <marcus dot shawcroft at arm dot com>]

This one might be a tad contraversial...

We have a customer providing his own libgloss. His libgloss provides a 
sane ftruncate(). The vanilla ARM libgloss does not provide an 
ftruncate() implementation hence when libgfortran is configured, 
autoconf does not detect ftruncate() and configures in a call to emit a 
run time diagnostic instead of calling ftruncate().

The intention here is to provide an ftruncate stub to ensure that 
libgfortran configury configures in the ftruncate call. The stub always 
returns failure because we have no mechanism to implement a sane 
ftruncate over the AngelAPI.

OK?

Cheers
/Marcus

libgloss

	* arm/ftruncate.c: New.
	* arm/truncate.c: New.
	* arm/Makefile.in (RDPMON_OBJS): Add ftruncate.o and truncate.o.
	(rdimon-ftruncate.o, rdimon-truncate.o): New rule:

newlib

	* libc/include/sys/unistd.h (ftruncate, truncate): Define
	for __arm__.

diff --git a/libgloss/arm/Makefile.in b/libgloss/arm/Makefile.in
index 8806277..ab5c9cb 100644
--- a/libgloss/arm/Makefile.in
+++ b/libgloss/arm/Makefile.in
@@ -68,7 +68,7 @@ REDBOOT_INSTALL	= install-redboot
 
 RDPMON_CRT0	= rdpmon-crt0.o
 RDPMON_BSP	= librdpmon.a
-RDPMON_OBJS	= syscalls.o libcfunc.o trap.o _exit.o _kill.o
+RDPMON_OBJS	= ftruncate.o libcfunc.o syscalls.o trap.o truncate.o _exit.o _kill.o
 RDPMON_SCRIPTS	= rdpmon.specs
 RDPMON_INSTALL	= install-rdpmon
 
@@ -123,9 +123,15 @@ rdpmon-crt0.o: crt0.S
 rdimon-crt0.o: crt0.S
 	$(CC) $(CFLAGS_FOR_TARGET) $(CFLAGS) $(INCLUDES) -DARM_RDI_MONITOR -o $@ -c $<
 
+rdimon-ftruncate.o: ftruncate.c
+	$(CC) $(CFLAGS_FOR_TARGET) $(CFLAGS) $(INCLUDES) -DARM_RDI_MONITOR -o $@ -c $<
+
 rdimon-trap.o: trap.S
 	$(CC) $(CFLAGS_FOR_TARGET) $(CFLAGS) $(INCLUDES) -DARM_RDI_MONITOR -o $@ -c $<
 
+rdimon-truncate.o: truncate.c
+	$(CC) $(CFLAGS_FOR_TARGET) $(CFLAGS) $(INCLUDES) -DARM_RDI_MONITOR -o $@ -c $<
+
 rdimon-_exit.o: _exit.c
 	$(CC) $(CFLAGS_FOR_TARGET) $(CFLAGS) $(INCLUDES) -DARM_RDI_MONITOR -o $@ -c $<
 
diff --git a/libgloss/arm/ftruncate.c b/libgloss/arm/ftruncate.c
new file mode 100644
index 0000000..da46fc5
--- /dev/null
+++ b/libgloss/arm/ftruncate.c
@@ -0,0 +1,32 @@
+/* Copyright (c) 2013 ARM Ltd.  All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+ 1. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+ 3. The name of the company may not be used to endorse or promote
+    products derived from this software without specific prior written
+    permission.
+
+ THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
+
+#include <sys/types.h>
+
+int
+ftruncate (int file, off_t length)
+{
+  return -1;
+}
diff --git a/libgloss/arm/truncate.c b/libgloss/arm/truncate.c
new file mode 100644
index 0000000..d53394a
--- /dev/null
+++ b/libgloss/arm/truncate.c
@@ -0,0 +1,32 @@
+/* Copyright (c) 2013 ARM Ltd.  All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+ 1. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+ 3. The name of the company may not be used to endorse or promote
+    products derived from this software without specific prior written
+    permission.
+
+ THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
+
+#include <sys/types.h>
+
+int
+truncate (const char *path, off_t length)
+{
+  return -1;
+}
diff --git a/newlib/libc/include/sys/unistd.h b/newlib/libc/include/sys/unistd.h
index f1aacfa..0667080 100644
--- a/newlib/libc/include/sys/unistd.h
+++ b/newlib/libc/include/sys/unistd.h
@@ -222,7 +222,7 @@ _READ_WRITE_RETURN_TYPE _EXFUN(_write, (int __fd, const void *__buf, size_t __nb
 int     _EXFUN(_execve, (const char *__path, char * const __argv[], char * const __envp[] ));
 #endif
 
-#if defined(__CYGWIN__) || defined(__rtems__) || defined(__sh__) || defined(__SPU__)
+#if defined(__CYGWIN__) || defined(__rtems__) || defined (__arm__) || defined(__sh__) || defined(__SPU__)
 #if !defined(__INSIDE_CYGWIN__)
 int     _EXFUN(ftruncate, (int __fd, off_t __length));
 int     _EXFUN(truncate, (const char *, off_t __length));
-- 
1.7.9.5