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[PATCH] events.c: add similar system headers workaround as trace.c

Needed for E.G. powerpc on uClibc.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
---
 sysdeps/linux-gnu/events.c |   27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

Index: ltrace-0.6.0/sysdeps/linux-gnu/events.c
===================================================================
--- ltrace-0.6.0.orig/sysdeps/linux-gnu/events.c
+++ ltrace-0.6.0/sysdeps/linux-gnu/events.c
@@ -11,6 +11,33 @@
 
 #include "common.h"
 
+/* If the system headers did not provide the constants, hard-code the normal
+   values.  */
+#ifndef PTRACE_EVENT_FORK
+
+#define PTRACE_OLDSETOPTIONS    21
+#define PTRACE_SETOPTIONS       0x4200
+#define PTRACE_GETEVENTMSG      0x4201
+
+/* options set using PTRACE_SETOPTIONS */
+#define PTRACE_O_TRACESYSGOOD   0x00000001
+#define PTRACE_O_TRACEFORK      0x00000002
+#define PTRACE_O_TRACEVFORK     0x00000004
+#define PTRACE_O_TRACECLONE     0x00000008
+#define PTRACE_O_TRACEEXEC      0x00000010
+#define PTRACE_O_TRACEVFORKDONE 0x00000020
+#define PTRACE_O_TRACEEXIT      0x00000040
+
+/* Wait extended result codes for the above trace options.  */
+#define PTRACE_EVENT_FORK       1
+#define PTRACE_EVENT_VFORK      2
+#define PTRACE_EVENT_CLONE      3
+#define PTRACE_EVENT_EXEC       4
+#define PTRACE_EVENT_VFORK_DONE 5
+#define PTRACE_EVENT_EXIT       6
+
+#endif /* PTRACE_EVENT_FORK */
+
 static Event event;
 
 Event *