[PATCH v2] Define an error function in the PPC simulator library.

[John Baldwin <jhb@FreeBSD.org>]

Previously this used the error function from GDB directly when linked
against GDB instead of the error method in the host callbacks
structure.  This was exposed via a link error when GDB was converted
to C++.  The error function invokes the error callback similar to
sim_io_error.

sim/ppc/ChangeLog:

	PR sim/20863
	* sim_calls.c (error): New function.
---
 sim/ppc/ChangeLog   |  5 +++++
 sim/ppc/sim_calls.c | 10 ++++++++++
 2 files changed, 15 insertions(+)

diff --git a/sim/ppc/ChangeLog b/sim/ppc/ChangeLog
index c0bb1f5b8b..8ad90077c0 100644
--- a/sim/ppc/ChangeLog
+++ b/sim/ppc/ChangeLog
@@ -1,3 +1,8 @@
+2017-04-04  John Baldwin  <jhb@FreeBSD.org>
+
+	PR sim/20863
+	* sim_calls.c (error): New function.
+
 2017-02-13  Mike Frysinger  <vapier@gentoo.org>
 
 	* cpu.h: Include libiberty.h.
diff --git a/sim/ppc/sim_calls.c b/sim/ppc/sim_calls.c
index 470c95862a..eb5d1a792b 100644
--- a/sim/ppc/sim_calls.c
+++ b/sim/ppc/sim_calls.c
@@ -386,6 +386,16 @@ sim_io_error (SIM_DESC sd, const char *fmt, ...)
 
 /****/
 
+void NORETURN
+error (const char *msg, ...)
+{
+  va_list ap;
+  va_start(ap, msg);
+  callbacks->evprintf_filtered (callbacks, msg, ap);
+  va_end(ap);
+  callbacks->error (callbacks, "");
+}
+
 void *
 zalloc(long size)
 {
-- 
2.11.0