From 7047a200aff01fff2d4ac4d6f5d388f6344d9d48 Mon Sep 17 00:00:00 2001
From: Benjamin Valentin <benjamin.valentin@ml-pa.com>
Date: Mon, 2 Sep 2019 13:23:30 +0200
Subject: [PATCH 1/3] cpu/native: advertise support for unaligned memory access

On Linux, even if the architecture does not support it, the kernel will
catch the fault and emulate the unaligned accesss.
---
 cpu/native/include/cpu.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/cpu/native/include/cpu.h b/cpu/native/include/cpu.h
index b1641642c4..ff38639fd5 100644
--- a/cpu/native/include/cpu.h
+++ b/cpu/native/include/cpu.h
@@ -26,6 +26,12 @@
 extern "C" {
 #endif
 
+/**
+ * @brief   The CPU supports unaligned memory access.
+ *          Even if the underlying architecture does not support it, the kernel will take care of it.
+ */
+#define CPU_HAS_UNALIGNED_ACCESS
+
 /**
  * @brief   Prints the address the callee will return to
  */

From bf410c84f15471ede2bd6c6cab63f879d5e4e6a0 Mon Sep 17 00:00:00 2001
From: Benjamin Valentin <benpicco@googlemail.com>
Date: Sun, 1 Sep 2019 17:25:58 +0200
Subject: [PATCH 2/3] pkg/libb2: define HAVE_ALIGNED_ACCESS_REQUIRED based on
 CPU

Most architectures do not support unaligned memory access, so set the define accordingly.
---
 pkg/libb2/include/config.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkg/libb2/include/config.h b/pkg/libb2/include/config.h
index 55cc6a0e8e..75e6d3aeb4 100644
--- a/pkg/libb2/include/config.h
+++ b/pkg/libb2/include/config.h
@@ -1,6 +1,8 @@
 #ifndef CONFIG_H
 #define CONFIG_H
 
+#include "cpu.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -13,6 +15,10 @@ extern "C" {
 #define NATIVE_LITTLE_ENDIAN
 #endif
 
+#ifndef CPU_HAS_UNALIGNED_ACCESS
+#define HAVE_ALIGNED_ACCESS_REQUIRED
+#endif
+
 #ifdef __cplusplus
 }
 #endif

From 4707f6b74920a672e4ed23d0d2ddc1a30811bfb0 Mon Sep 17 00:00:00 2001
From: Benjamin Valentin <benpicco@googlemail.com>
Date: Sun, 1 Sep 2019 17:26:37 +0200
Subject: [PATCH 3/3] pkg/libb2: rename config.h to libb2_config.h

This is to avoid conflics with other config.h files, e.g. when building
for esp8266 where $(NEWLIB)/xtensa-lx106-elf/include/config.h gets
included instead.
---
 pkg/libb2/include/{config.h => libb2_config.h}    |   6 +++---
 .../0001-rename-config.h-to-libb2_config.h.patch  | Bin 0 -> 698 bytes
 2 files changed, 3 insertions(+), 3 deletions(-)
 rename pkg/libb2/include/{config.h => libb2_config.h} (82%)
 create mode 100644 pkg/libb2/patches/0001-rename-config.h-to-libb2_config.h.patch

diff --git a/pkg/libb2/include/config.h b/pkg/libb2/include/libb2_config.h
similarity index 82%
rename from pkg/libb2/include/config.h
rename to pkg/libb2/include/libb2_config.h
index 75e6d3aeb4..025e093d68 100644
--- a/pkg/libb2/include/config.h
+++ b/pkg/libb2/include/libb2_config.h
@@ -1,5 +1,5 @@
-#ifndef CONFIG_H
-#define CONFIG_H
+#ifndef LIBB2_CONFIG_H
+#define LIBB2_CONFIG_H
 
 #include "cpu.h"
 
@@ -22,4 +22,4 @@ extern "C" {
 #ifdef __cplusplus
 }
 #endif
-#endif /* CONFIG_H */
+#endif /* LIBB2_CONFIG_H */
diff --git a/pkg/libb2/patches/0001-rename-config.h-to-libb2_config.h.patch b/pkg/libb2/patches/0001-rename-config.h-to-libb2_config.h.patch
new file mode 100644
index 0000000000000000000000000000000000000000..f7e270bfef43d37eadf7eb43bcafe4e0b752d797
GIT binary patch
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