numpy: bump to version 1.21.1

Also bump Cython version to 0.29.23.
And add support for OpenBLAS.
Currently optional, but will be enabled by default on some architectures
later.

Depends on PR https://github.com/openwrt/packages/pull/15685

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

lang/python/host-pip-requirements/Cython.txt

@@ -1 +1 @@
-Cython==0.29.21 --hash=sha256:e57acb89bd55943c8d8bf813763d20b9099cc7165c0f16b707631a7654be9cad
+Cython==0.29.23 --hash=sha256:6a0d31452f0245daacb14c979c77e093eb1a546c760816b5eed0047686baad8e

lang/python/numpy/Makefile

@@ -6,11 +6,11 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=numpy
-PKG_VERSION:=1.20.2
+PKG_VERSION:=1.21.1
 PKG_RELEASE:=1
 
 PYPI_NAME:=$(PKG_NAME)
-PKG_HASH:=878922bf5ad7550aa044aa9301d417e2d3ae50f0f577de92051d739ac6096cee
+PKG_HASH:=dff4af63638afcc57a3dfb9e4b26d434a7a602d225b42d746ea7fe2edf1342fd
 
 PKG_MAINTAINER:=Alexandru Ardelean <ardeleanalex@gmail.com>
 
@@ -18,6 +18,9 @@ PKG_LICENSE:=BSD-3-Clause
 PKG_LICENSE_FILES:=LICENSE.txt
 PKG_CPE_ID:=cpe:/a:numpy:numpy
 
+PKG_CONFIG_DEPENDS:= \
+        CONFIG_NUMPY_OPENBLAS_SUPPORT
+
 # yes, zip... sigh
 PYPI_SOURCE_EXT:=zip
 HOST_PYTHON3_PACKAGE_BUILD_DEPENDS:=Cython
@@ -32,7 +35,39 @@ define Package/python3-numpy
   CATEGORY:=Languages
   TITLE:=The fundamental package for scientific computing with Python
   URL:=https://www.numpy.org/
-  DEPENDS:=@!SOFT_FLOAT +INSTALL_GFORTRAN:libgfortran +python3
+  DEPENDS:=@!SOFT_FLOAT +INSTALL_GFORTRAN:libgfortran +python3 \
+	   +NUMPY_OPENBLAS_SUPPORT:openblas
+endef
+
+# We need to duplicate the omitted arhitectures same as openblas
+define Package/python3-numpy/config
+menu "Configuration"
+depends on PACKAGE_python3-numpy
+depends on !powerpc
+depends on !arc
+
+config NUMPY_OPENBLAS_SUPPORT
+        bool "Enable OpenBLAS support"
+        default n
+
+endmenu
+endef
+
+ifdef CONFIG_NUMPY_OPENBLAS_SUPPORT
+define Build/Prepare/numpy-sitecfg
+	echo "[DEFAULT]"                                 >  $(PKG_BUILD_DIR)/site.cfg
+	echo "library_dirs = $(STAGING_DIR)/usr/lib"     >> $(PKG_BUILD_DIR)/site.cfg
+	echo "include_dirs = $(STAGING_DIR)/usr/include" >> $(PKG_BUILD_DIR)/site.cfg
+	echo                                             >> $(PKG_BUILD_DIR)/site.cfg
+	echo "[openblas]"                                >> $(PKG_BUILD_DIR)/site.cfg
+	echo "libraries = openblas"                      >> $(PKG_BUILD_DIR)/site.cfg
+	echo "runtime_library_dirs = /usr/lib"           >> $(PKG_BUILD_DIR)/site.cfg
+endef
+endif
+
+define Build/Prepare
+	$(call Build/Prepare/Default)
+	$(call Build/Prepare/numpy-sitecfg)
 endef
 
 define Package/python3-numpy/description