package/powerpc-utils: fix build with musl

Backport an upstream patch that fixes the build with musl.

Fixes:

  http://autobuild.buildroot.net/results/631e74e6f7b7bc216800203acc99b6a53af266b6/

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

package/powerpc-utils/0001-add-includes-defines-for-musl-libc-support.patch

@@ -0,0 +1,101 @@
+From 2efa853ef04c331444c9014af108d17544d5ed1b Mon Sep 17 00:00:00 2001
+From: Fabian Groffen <grobian@gentoo.org>
+Date: Fri, 21 May 2021 11:25:21 +0200
+Subject: [PATCH] add includes/defines for musl libc support
+
+- add some missing includes to get proper definitions for beXXtoh and
+  PATH_MAX
+- guard backtrace() from execinfo.h usage for it is glibc only
+
+Signed-off-by: Fabian Groffen <grobian@gentoo.org>
+Reviewed-by: Nathan Lynch <nathanl@linux.ibm.com>
+Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
+Upstream: c73206b62d6d827cbc37a10f0195b5d2cf3f2fbb
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
+---
+ src/common/cpu_info_helpers.c | 1 +
+ src/drmgr/common.c            | 6 ++++++
+ src/drmgr/dr.h                | 1 +
+ src/rtas_dbg.c                | 1 +
+ 4 files changed, 9 insertions(+)
+
+diff --git a/src/common/cpu_info_helpers.c b/src/common/cpu_info_helpers.c
+index 3d08ff7..925f220 100644
+--- a/src/common/cpu_info_helpers.c
++++ b/src/common/cpu_info_helpers.c
+@@ -29,6 +29,7 @@
+ #include <errno.h>
+ #include <stdbool.h>
+ #include <dirent.h>
++#include <limits.h>
+ #include <sys/stat.h>
+ #include <sys/types.h>
+ #include "cpu_info_helpers.h"
+diff --git a/src/drmgr/common.c b/src/drmgr/common.c
+index 5e8135b..32cf805 100644
+--- a/src/drmgr/common.c
++++ b/src/drmgr/common.c
+@@ -28,7 +28,9 @@
+ #include <signal.h>
+ #include <errno.h>
+ #include <dirent.h>
++#ifdef __GLIBC__
+ #include <execinfo.h>
++#endif
+ #include <ctype.h>
+ #include <sys/wait.h>
+ #include <endian.h>
+@@ -853,6 +855,7 @@ sighandler(int signo)
+ 	say(ERROR, "Received signal %d, attempting to cleanup and exit\n",
+ 	    signo);
+ 
++#ifdef __GLIBC__
+ 	if (log_fd) {
+ 		void *callstack[128];
+ 		int sz;
+@@ -860,6 +863,7 @@ sighandler(int signo)
+ 		sz = backtrace(callstack, 128);
+ 		backtrace_symbols_fd(callstack, sz, log_fd);
+ 	}
++#endif
+ 
+ 	dr_fini();
+ 	exit(-1);
+@@ -925,8 +929,10 @@ sig_setup(void)
+ 	if (sigaction(SIGBUS, &sigact, NULL))
+ 		return -1;
+ 
++#ifdef __GLIBC__
+ 	/* dummy call to backtrace to get symbol loaded */
+ 	backtrace(callstack, 128);
++#endif
+ 	return 0;
+ }
+ 
+diff --git a/src/drmgr/dr.h b/src/drmgr/dr.h
+index f171bfe..b32d49a 100644
+--- a/src/drmgr/dr.h
++++ b/src/drmgr/dr.h
+@@ -26,6 +26,7 @@
+ #include <nl_types.h>
+ #include <unistd.h>
+ #include <stdarg.h>
++#include <limits.h>
+ #include "rtas_calls.h"
+ #include "drpci.h"
+ 
+diff --git a/src/rtas_dbg.c b/src/rtas_dbg.c
+index 526e78b..ebc7474 100644
+--- a/src/rtas_dbg.c
++++ b/src/rtas_dbg.c
+@@ -32,6 +32,7 @@
+ #include <getopt.h>
+ #include <dirent.h>
+ #include <string.h>
++#include <endian.h>
+ #include <sys/syscall.h>
+ #include <unistd.h>
+ #include <linux/unistd.h>
+-- 
+2.37.1
+