valgrind: fix build on PowerPC/uClibc

Add replacement for <a.out.h>

Valgrind includes <a.out.h> to get the definition of 'struct

nlist'. However, while glibc directly defines 'struct nlist' in

<a.out.h>, uClibc relies on it being defined by kernel headers (i.e

<a.out.h> simply includes <linux/a.out.h>). This works for most

architectures, but not for PowerPC, on which the a.out binary format

has never been supported, and therefore the <linux/a.out.h> kernel

header does not exist.

One solution would have been to use the <nlist.h> header, but this one

is only available in glibc, and it also has a slightly different

definition than the one in <a.out.h>. So, for the time being, the

easiest solution is to just replace the #include <a.out.h> in Valgrind

code by a copy/paste of the 'struct nlist' definition.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

Index: b/coregrind/m_debuginfo/readstabs.c

===================================================================

--- a/coregrind/m_debuginfo/readstabs.c

+++ b/coregrind/m_debuginfo/readstabs.c

@@ -52,7 +52,21 @@

 /* --- !!! --- EXTERNAL HEADERS start --- !!! --- */

 #if defined(VGO_linux)

-#  include <a.out.h> /* stabs defns */

+/* Copied from a.out.h, because it is otherwise not available on

+   PowerPC/uClibc */

+struct nlist

+{

+  union

+    {

+      char *n_name;

+      struct nlist *n_next;

+      long n_strx;

+    } n_un;

+  unsigned char n_type;

+  char n_other;

+  short n_desc;

+  unsigned long n_value;

+};

 #elif defined(VGO_darwin)

 #  include <mach-o/nlist.h>

 #  define n_other n_sect