pkg/wamr: add WAMR to provide WASM support in RIOT

* config.cmake configures wamr build
* native thumb and mips
* riscv support
* switchable commit id
  defaults to main until PR:WIP is removed

pkg/wamr/CMakeLists.txt

@@ -0,0 +1,60 @@
+# Copyright (C) 2019 Intel Corporation.  All rights reserved.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+cmake_minimum_required(VERSION 3.8.2)
+
+set(CMAKE_TRY_COMPILE_TARGET_TYPE "STATIC_LIBRARY")
+
+project(NONE)
+
+enable_language (ASM)
+
+set (WAMR_BUILD_PLATFORM "riot")
+
+if (DEFINED WAMR_CONFIG)
+  include (${WAMR_CONFIG})
+endif ()
+
+# Build as X86_32 by default, change to "AARCH64[sub]", "ARM[sub]", "THUMB[sub]", "MIPS" or "XTENSA"
+# if we want to support arm, thumb, mips or xtensa
+if (NOT DEFINED WAMR_BUILD_TARGET)
+  set (WAMR_BUILD_TARGET "X86_32")
+endif ()
+
+if (NOT DEFINED WAMR_BUILD_INTERP)
+  # Enable Interpreter by default
+  set (WAMR_BUILD_INTERP 1)
+endif ()
+
+if (NOT DEFINED WAMR_BUILD_AOT)
+  # Disable AOT by default.
+  set (WAMR_BUILD_AOT 0)
+endif ()
+
+if (NOT DEFINED WAMR_BUILD_LIBC_BUILTIN)
+  # Enable libc builtin support by default
+  set (WAMR_BUILD_LIBC_BUILTIN 1)
+endif ()
+
+if (NOT DEFINED WAMR_BUILD_LIBC_WASI)
+  # Disable libc wasi support by default
+  set (WAMR_BUILD_LIBC_WASI 0)
+endif ()
+
+if (NOT DEFINED WAMR_ROOT_DIR)
+  # this assumption is true if this file is copied to WAMR_ROOT
+  set (WAMR_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR})
+endif ()
+
+include (${WAMR_ROOT_DIR}/build-scripts/runtime_lib.cmake)
+
+# need includes from RIOT
+string(REGEX MATCHALL "([^\ ]+\ |[^\ ]+$)" RIOT_INCLUDES_LIST "${RIOT_INCLUDES}")
+
+include_directories(SYSTEM ${RIOT_INCLUDES_LIST})
+
+
+# target_sources( ${WAMR_RUNTIME_LIB_SOURCE} )
+# executable linking is done by RIOT build system this just builds libwamr.a
+
+add_library( wamr ${WAMR_RUNTIME_LIB_SOURCE})

pkg/wamr/Makefile

@@ -0,0 +1,81 @@
+PKG_NAME=wamr
+PKG_URL=https://github.com/bytecodealliance/wasm-micro-runtime.git
+PKG_BLEADING?=1
+ifeq ($(PKG_BLEADING),1)
+  PKG_VERSION=main
+else
+  PKG_VERSION=8fd89bd415db73281c8fbd53de1c2726f35b5ddb
+endif
+PKG_LICENSE=Apache-2.0
+
+PKG_CUSTOM_PREPARED = CHECK_VERSION
+
+include $(RIOTBASE)/pkg/pkg.mk
+
+#less Wall TODO: get things fixed upstream
+CFLAGS :=  $(filter-out -pedantic, $(CFLAGS))
+CFLAGS += -Wno-format
+CFLAGS += -Wno-strict-prototypes
+CFLAGS += -Wno-old-style-definition
+CFLAGS += -Wno-cast-function-type
+
+#Prepapre includes for cmake
+RIOT_INCLUDES = $(filter-out -%,$(subst -I,,$(INCLUDES)))
+
+#translate (CPU_ARCH) to Build Target
+#WAMR_BUILD_TARGET is "X86_32" "AARCH64[sub]", "ARM[sub]",
+#                     "THUMB[sub]", "MIPS" or "XTENSA"
+#no msp430, no AVR support for now
+
+ifeq ($(CPU),native)
+#$(CPU) is defined for every CPU
+#everyone build on x86_32
+  WAMR_BUILD_TARGET = X86_32
+else ifeq ($(findstring arm,$(CPU_ARCH)),arm)
+  WAMR_BUILD_TARGET = THUMB
+else ifeq ($(CPU_ARCH),mips32r2)
+  WAMR_BUILD_TARGET = MIPS
+else ifeq ($(CPU_ARCH),xtensa)
+  WAMR_BUILD_TARGET = XTENSA
+else ifeq ($(CPU_ARCH),rv32)
+  WAMR_BUILD_TARGET = RISCV32
+endif
+
+ifeq ($(QUIET),0)
+  CMAKEMAKEFLAGS += VERBOSE=1
+endif
+
+#WAMR_CONFIG will be included into the cmake
+ifneq ($(WAMR_CONFIG),)
+  WAMR_CMAKE_FLAGS += "-DWAMR_CONFIG=$(WAMR_CONFIG)"
+endif
+
+WAMR_CMAKE_FLAGS += "-DRIOT_INCLUDES=$(RIOT_INCLUDES)"\
+                     -DWAMR_BUILD_TARGET=$(WAMR_BUILD_TARGET)\
+                     -DWAMR_ROOT_DIR=$(PKG_SOURCE_DIR)/ \
+                     -DCMAKE_SYSTEM_NAME=Generic \
+                     -DCMAKE_SYSTEM_PROCESSOR="$(MCPU)" \
+                     -DCMAKE_C_COMPILER=$(CC) \
+                     -DCMAKE_C_COMPILER_WORKS=TRUE \
+
+all: $(BINDIR)/libwamr.a
+
+$(BINDIR)/libwamr.a: $(PKG_BUILD_DIR)/libwamr.a
+	cp $< $@
+
+$(PKG_BUILD_DIR)/libwamr.a: $(PKG_BUILD_DIR)/Makefile
+	+$(MAKE) -C $(PKG_BUILD_DIR) $(CMAKEMAKEFLAGS)
+
+$(PKG_BUILD_DIR)/Makefile: $(PKG_PREPARED) print_build_target
+	ASMFLAGS="${CFLAGS}" cmake -B$(PKG_BUILD_DIR) $(WAMR_CMAKE_FLAGS)
+
+print_build_target:
+	@echo PKG_VERSION: $(PKG_VERSION)
+	@echo CPU_ARCH: $(CPU_ARCH)
+	@echo CPU: $(CPU)
+	@echo CFLAGS: $(CFLAGS)
+	@echo WAMR_BUILD_TARGET: $(WAMR_BUILD_TARGET)
+	@echo WAMR_CONFIG: $(WAMR_CONFIG)
+
+CHECK_VERSION:
+	test -f $(PKG_DOWNLOADED) && (test `cat $(PKG_DOWNLOADED)` = $(PKG_VERSION) || rm $(PKG_DOWNLOADED));true

pkg/wamr/Makefile.dep

@@ -0,0 +1,5 @@
+USEMODULE += sema
+
+#WAMR supports "X86_32/64", "AARCH64", "ARM", "THUMB", "MIPS" and "XTENSA"
+#no 8/16 Bit TODO: might need to blacklist more
+FEATURES_BLACKLIST += arch_8bit arch_16bit

pkg/wamr/Makefile.include

@@ -0,0 +1,11 @@
+IWASM_CORE = $(PKGDIRBASE)/wamr/core
+IWASM_ROOT = $(IWASM_CORE)/iwasm
+SHARED_LIB_ROOT = $(IWASM_CORE)/shared
+
+IWASM_INCLUDES += ${IWASM_ROOT}/include \
+                   ${SHARED_LIB_ROOT}/platform/include \
+                   ${SHARED_LIB_ROOT}/platform/riot \
+
+INCLUDES += $(addprefix -I,${IWASM_INCLUDES})
+
+ARCHIVES += $(BINDIR)/libwamr.a

pkg/wamr/config.cmake

@@ -0,0 +1,21 @@
+# following line a hints for build options mostly untested
+# some are not matching RIOTs application targets
+# they default to off
+
+# set (WAMR_BUILD_LIBC_WASI 1) #enable libc wasi support
+# set (WAMR_BUILD_THREAD_MGR 1) #enable thread manager support
+# set (WAMR_BUILD_APP_FRAMEWORK 1) #enable WAMR app framework support
+# set (WAMR_BUILD_LIB_PTHREAD 1) #enable pthread support
+
+# set (WAMR_BUILD_JIT 1) #enable WAMR JIT
+# set (WAMR_BUILD_FAST_INTERP 1) #enable Fast interpreter
+# set (WAMR_BUILD_MULTI_MODULE 1) #enable Multiple modules
+# set (WAMR_BUILD_SPEC_TEST 1) #enable spec test compatible mode is on
+# set (WAMR_BUILD_BULK_MEMORY 1) #enable Bulk memory feature
+# set (WAMR_BUILD_SHARED_MEMORY 1) #enable Shared memory
+# set (WAMR_BUILD_MINI_LOADER 1) #enable WASM mini loader
+# set (WAMR_DISABLE_HW_BOUND_CHECK 1) #enable Hardware boundary check disabled
+# set (WAMR_BUILD_MEMORY_PROFILING 1) #enable Memory profiling
+# set (WAMR_APP_THREAD_STACK_SIZE_MAX ${WAMR_APP_THREAD_STACK_SIZE_MAX})  #set maximum thread stack size
+# set (WAMR_BUILD_CUSTOM_NAME_SECTION 1) #enable Custom name section
+# set (WAMR_BUILD_TAIL_CALL 1) #enable Tail call

pkg/wamr/doc.txt

@@ -0,0 +1,6 @@
+/**
+ * @defgroup pkg_wamr WebAssembly Micro Runtime
+ * @ingroup  pkg
+ * @brief    Provides WebAssembly support for RIOT
+ * @see      https://github.com/bytecodealliance/wasm-micro-runtime
+ */