python-numpy: Add support of ARC architecture

This enables support for ARC cores in numpy.
Cherry-picked from
https://github.com/numpy/numpy/commit/8edd610ffa3499eea3580f98f296ec80578fba73

Hopefully becomes a part of the next major release (like 1.14).

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

package/python-numpy/0002-Add-support-of-ARC.patch

@@ -0,0 +1,68 @@
+From 9a225e7d4fb1de5c99c6b5b17cae2fc4c2d1c59a Mon Sep 17 00:00:00 2001
+From: Alexey Brodkin <abrodkin@synopsys.com>
+Date: Fri, 15 Sep 2017 11:59:14 +0300
+Subject: [PATCH] Add support of ARC
+
+Synopsys DesignWare ARC Processors are a family of 32-bit CPUs
+which in some configurations may run Linux kernel and full stack
+of applications on top of it. Among other things is Python.
+
+With that change we allow building and usage of Numpy on ARC.
+
+Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
+---
+ numpy/core/include/numpy/npy_cpu.h    | 6 ++++++
+ numpy/core/include/numpy/npy_endian.h | 6 ++++--
+ 2 files changed, 10 insertions(+), 2 deletions(-)
+
+diff --git a/numpy/core/include/numpy/npy_cpu.h b/numpy/core/include/numpy/npy_cpu.h
+index 60abae4e0b0e..84653ea183ce 100644
+--- a/numpy/core/include/numpy/npy_cpu.h
++++ b/numpy/core/include/numpy/npy_cpu.h
+@@ -15,6 +15,8 @@
+  *              NPY_CPU_ARMEB
+  *              NPY_CPU_SH_LE
+  *              NPY_CPU_SH_BE
++ *              NPY_CPU_ARCEL
++ *              NPY_CPU_ARCEB
+  */
+ #ifndef _NPY_CPUARCH_H_
+ #define _NPY_CPUARCH_H_
+@@ -76,6 +78,10 @@
+     #define NPY_CPU_AARCH64
+ #elif defined(__mc68000__)
+     #define NPY_CPU_M68K
++#elif defined(__arc__) && defined(__LITTLE_ENDIAN__)
++    #define NPY_CPU_ARCEL
++#elif defined(__arc__) && defined(__BIG_ENDIAN__)
++    #define NPY_CPU_ARCEB
+ #else
+     #error Unknown CPU, please report this to numpy maintainers with \
+     information about your platform (OS, CPU and compiler)
+diff --git a/numpy/core/include/numpy/npy_endian.h b/numpy/core/include/numpy/npy_endian.h
+index e34b1d97e655..1a42121db92e 100644
+--- a/numpy/core/include/numpy/npy_endian.h
++++ b/numpy/core/include/numpy/npy_endian.h
+@@ -45,7 +45,8 @@
+             || defined(NPY_CPU_AARCH64) \
+             || defined(NPY_CPU_SH_LE)   \
+             || defined(NPY_CPU_MIPSEL)  \
+-            || defined(NPY_CPU_PPC64LE)
++            || defined(NPY_CPU_PPC64LE) \
++            || defined(NPY_CPU_ARCEL)
+         #define NPY_BYTE_ORDER NPY_LITTLE_ENDIAN
+     #elif defined(NPY_CPU_PPC)          \
+             || defined(NPY_CPU_SPARC)   \
+@@ -56,7 +57,8 @@
+             || defined(NPY_CPU_SH_BE)   \
+             || defined(NPY_CPU_MIPSEB)  \
+             || defined(NPY_CPU_OR1K)    \
+-            || defined(NPY_CPU_M68K)
++            || defined(NPY_CPU_M68K)    \
++            || defined(NPY_CPU_ARCEB)
+         #define NPY_BYTE_ORDER NPY_BIG_ENDIAN
+     #else
+         #error Unknown CPU: can not set endianness
+-- 
+2.7.5
+

package/python-numpy/Config.in

@@ -1,7 +1,7 @@
 config BR2_PACKAGE_PYTHON_NUMPY_ARCH_SUPPORTS
 	bool
 	# Numpy has some CPU specific code
-	default y if BR2_aarch64 || BR2_arm || BR2_armeb || BR2_i386 \
+	default y if BR2_arc || BR2_aarch64 || BR2_arm || BR2_armeb || BR2_i386 \
 		|| BR2_mips || BR2_mipsel || BR2_powerpc || BR2_powerpc64 \
 		|| BR2_sh || BR2_x86_64