From 866c713a7e8b316668dffb71350181c571ec0075 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20Kijewski?= <rene.kijewski@fu-berlin.de>
Date: Fri, 26 Sep 2014 13:59:37 +0200
Subject: [PATCH 1/2] native: -DNATIVE_INCLUDES if using NATIVEINCLUDES

It can be useful to know if the current compilation builds the native
board module, because e.g. then we must not include `sys/types.h`.

This diff adds `-DNATIVE_INCLUDES` to the make variable
`NATIVEINCLUDES`.
---
 boards/native/Makefile.include | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/boards/native/Makefile.include b/boards/native/Makefile.include
index 50702b83a..498fa82c5 100644
--- a/boards/native/Makefile.include
+++ b/boards/native/Makefile.include
@@ -1,6 +1,7 @@
 include $(RIOTBOARD)/$(BOARD)/Makefile.dep
 
-export NATIVEINCLUDES = -I$(RIOTBOARD)/$(BOARD)/include/
+export NATIVEINCLUDES += -DNATIVE_INCLUDES
+export NATIVEINCLUDES += -I$(RIOTBOARD)/$(BOARD)/include/
 export NATIVEINCLUDES += -I$(RIOTBASE)/core/include/
 export NATIVEINCLUDES += -I$(RIOTBASE)/drivers/include/
 

From 4e50d74272b092c1f2df711f374c4c18f682fe75 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20Kijewski?= <rene.kijewski@fu-berlin.de>
Date: Fri, 26 Sep 2014 14:04:30 +0200
Subject: [PATCH 2/2]  core: Provide ssize_t in a common place

 Now you can include `kernel_types.h` if you need the `ssize_t`, without
 facing problems due to the terrible MSP toolchain.
---
 core/include/kernel_types.h              | 18 ++++++++++++++++++
 cpu/atmega_common/include/sys/types.h    |  1 -
 cpu/msp430-common/include/msp430_types.h |  6 +++---
 3 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/core/include/kernel_types.h b/core/include/kernel_types.h
index b0fafc9b8..94ea4c9cf 100644
--- a/core/include/kernel_types.h
+++ b/core/include/kernel_types.h
@@ -11,6 +11,24 @@
 
 #include <stdint.h>
 #include <inttypes.h>
+#include <limits.h>
+
+#ifndef NATIVE_INCLUDES
+#   include <stddef.h>
+#   include <sys/types.h>
+
+#   ifndef SSIZE_MAX
+#       ifdef _POSIX_SSIZE_MAX
+#           define SSIZE_MAX _POSIX_SSIZE_MAX
+#       else
+#           define SSIZE_MAX ((ssize_t) (SIZE_MAX / 2))
+#       endif
+#   endif
+
+#   if defined (MODULE_MSP430_COMMON) || defined (MODULE_ATMEGA_COMMON)
+        typedef signed ssize_t;
+#   endif
+#endif
 
 /**
  * @def MAXTHREADS
diff --git a/cpu/atmega_common/include/sys/types.h b/cpu/atmega_common/include/sys/types.h
index dbd94e301..34f727d48 100644
--- a/cpu/atmega_common/include/sys/types.h
+++ b/cpu/atmega_common/include/sys/types.h
@@ -10,4 +10,3 @@
 #include <stddef.h>
 
 typedef int16_t suseconds_t;
-typedef size_t ssize_t;
diff --git a/cpu/msp430-common/include/msp430_types.h b/cpu/msp430-common/include/msp430_types.h
index f5673601b..839bfd5cb 100644
--- a/cpu/msp430-common/include/msp430_types.h
+++ b/cpu/msp430-common/include/msp430_types.h
@@ -12,6 +12,9 @@
 #include <sys/_types.h>
 #include <errno.h>
 
+/** defining signed type for size_t */
+#include "kernel_types.h"
+
 #ifndef EINVAL
 /**
  * @brief defines EINVAL if MSP430 toolchain is too old to provide it itself
@@ -28,9 +31,6 @@
 #define EOVERFLOW   (65)
 #endif
 
-/** defining signed type for size_t */
-typedef _ssize_t ssize_t;
-
 typedef unsigned long time_t;
 
 struct timespec {