micropython: new package

Micro Python is a lean and fast implementation of the Python 3
programming language that is optimised to run on a microcontroller.

[Thomas: fix minor typo in Config.in noticed by Vicente.]

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Tested-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/Config.in

@@ -509,6 +509,7 @@ menu "Lua libraries/modules"
 endmenu
 endif
 	source "package/lutok/Config.in"
+	source "package/micropython/Config.in"
 	source "package/moarvm/Config.in"
 	source "package/mono/Config.in"
 if BR2_PACKAGE_MONO

package/micropython/0001-fix-version.patch

@@ -0,0 +1,22 @@
+Always use the fallback behaviour for determining the version number
+
+When built from within buildroot the micropython build process detects
+that it is inside a git repository and ends up using the buildroot
+version number instead of the correct micropython version number.
+
+Signed-off-by: Chris Packham <judge.packham@gmail.com>
+---
+diff -Naur micropython-v1.4.5-old/py/makeversionhdr.py micropython-v1.4.5/py/makeversionhdr.py
+--- micropython-v1.4.5-old/py/makeversionhdr.py	2015-08-12 00:42:30.000000000 +1200
++++ micropython-v1.4.5/py/makeversionhdr.py	2015-09-16 10:21:06.698962836 +1200
+@@ -70,9 +70,7 @@
+ 
+ def make_version_header(filename):
+     # Get version info using git, with fallback to docs/conf.py
+-    info = get_version_info_from_git()
+-    if info is None:
+-        info = get_version_info_from_docs_conf()
++    info = get_version_info_from_docs_conf()
+ 
+     git_tag, git_hash, ver = info
+ 

package/micropython/Config.in

@@ -0,0 +1,12 @@
+config BR2_PACKAGE_MICROPYTHON
+	bool "micropython"
+	select BR2_PACKAGE_LIBFFI
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	help
+	  Micro Python is a lean and fast implementation of the Python 3
+	  programming language that is optimised to run on a microcontroller.
+
+	  http://micropython.org
+
+comment "micropython needs a toolchain w/ threads"
+	depends on !BR2_TOOLCHAIN_HAS_THREADS

package/micropython/micropython.mk

@@ -0,0 +1,32 @@
+################################################################################
+#
+# micropython
+#
+################################################################################
+
+MICROPYTHON_VERSION = v1.4.5
+MICROPYTHON_SITE = $(call github,micropython,micropython,$(MICROPYTHON_VERSION))
+MICROPYTHON_LICENSE = MIT
+MICROPYTHON_LICENSE_FILES = LICENSE
+MICROPYTHON_DEPENDENCIES = host-pkgconf libffi
+
+# Use fallback implementation for exception handling on architectures that don't
+# have explicit support.
+ifeq ($(BR2_powerpc),y)
+MICROPYTHON_CFLAGS = -DMICROPY_GCREGS_SETJMP=1
+endif
+
+define MICROPYTHON_BUILD_CMDS
+	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D)/unix \
+		CROSS_COMPILE=$(TARGET_CROSS) \
+		CFLAGS_EXTRA=$(MICROPYTHON_CFLAGS)
+endef
+
+define MICROPYTHON_INSTALL_TARGET_CMDS
+	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D)/unix \
+		DESTDIR=$(TARGET_DIR) \
+		PREFIX=$(TARGET_DIR)/usr \
+		install
+endef
+
+$(eval $(generic-package))