lua-bit32: new package

This package is needed to make luaposix work.

The upstream name is just "bit32", but the luarocks infra doesn't
support an upstream name different from the Buildroot name. We therefore
have to explicitly set all variables and we need custom extract
commands.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
[Thomas:
 - add entry to DEVELOPERS file
 - remove useless "depends on BR2_PACKAGE_HAS_LUAINTERPRETER" in
   Config.in file.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

DEVELOPERS

@@ -106,6 +106,7 @@ N:	Arnout Vandecappelle <arnout@mind.be>
 F:	package/freescale-imx/firmware-imx/
 F:	package/freescale-imx/imx-lib/
 F:	package/gstreamer/gst-fsl-plugins/
+F:	package/lua-bit32/
 F:	package/owfs/
 F:	package/python-bottle/
 F:	package/sqlcipher/

package/Config.in

@@ -537,6 +537,7 @@ menu "Lua libraries/modules"
 	source "package/lpty/Config.in"
 	source "package/lrandom/Config.in"
 	source "package/lsqlite3/Config.in"
+	source "package/lua-bit32/Config.in"
 	source "package/lua-cjson/Config.in"
 	source "package/lua-coat/Config.in"
 	source "package/lua-coatpersistent/Config.in"

package/lua-bit32/Config.in

@@ -0,0 +1,8 @@
+config BR2_PACKAGE_LUA_BIT32
+	bool "lua-bit32"
+	help
+	  bit32 is the native Lua 5.2 bit manipulation library, in the
+	  version from Lua 5.3; it is compatible with Lua 5.1, 5.2 and
+	  5.3.
+
+	  http://www.lua.org/manual/5.2/manual.html#6.7

package/lua-bit32/lua-bit32.hash

@@ -0,0 +1,2 @@
+# Locally calculated
+sha256  fe7bc70d1e48183d95ccfb6741e70a676283075173122cb161303d77059b27a6  bit32-5.3.0-1.src.rock

package/lua-bit32/lua-bit32.mk

@@ -0,0 +1,20 @@
+################################################################################
+#
+# lua-bit32
+#
+################################################################################
+
+LUA_BIT32_VERSION = 5.3.0-1
+LUA_BIT32_SUBDIR = lua-compat-5.2
+LUA_BIT32_ROCKSPEC = bit32-$(LUA_BIT32_VERSION).rockspec
+LUA_BIT32_SOURCE = bit32-$(LUA_BIT32_VERSION).src.rock
+LUA_BIT32_LICENSE = MIT
+LUA_BIT32_LICENSE_FILES = $(LUA_BIT32_SUBDIR)/LICENSE
+
+define LUA_BIT32_EXTRACT_CMDS
+        cd $(LUA_BIT32_DIR) && \
+                $(LUAROCKS_RUN_ENV) $(LUAROCKS_RUN_CMD) unpack --force $(DL_DIR)/$(LUA_BIT32_SOURCE) && \
+		mv bit32-$(LUA_BIT32_VERSION)/* .
+endef
+
+$(eval $(luarocks-package))