add wasmedge to build system

Builds/CMake/deps/WasmEdge.cmake

@@ -0,0 +1,52 @@
+#[===================================================================[
+   NIH dep: wasmedge: web assembly runtime for hooks.
+#]===================================================================]
+
+if (is_root_project) # WasmEdge not needed in the case of xrpl_core inclusion build
+  if (CMAKE_BUILD_TYPE STREQUAL "Debug")
+    set(OLD_DEBUG_POSTFIX ${CMAKE_DEBUG_POSTFIX})
+    set(CMAKE_DEBUG_POSTFIX _d)
+  endif ()
+  add_library (wasmedge INTERFACE)
+  ExternalProject_Add (wasmedge_src
+    PREFIX ${nih_cache_path}
+    GIT_REPOSITORY https://github.com/WasmEdge/WasmEdge.git
+    GIT_TAG 0.8.2
+      CMAKE_ARGS
+    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+    $<$<BOOL:${CMAKE_VERBOSE_MAKEFILE}>:-DCMAKE_VERBOSE_MAKEFILE=ON>
+    -DCMAKE_DEBUG_POSTFIX=_d
+    $<$<NOT:$<BOOL:${is_multiconfig}>>:-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}>
+    $<$<BOOL:${MSVC}>:
+      "-DCMAKE_C_FLAGS=-GR -Gd -fp:precise -FS -MP"
+      "-DCMAKE_C_FLAGS_DEBUG=-MTd"
+      "-DCMAKE_C_FLAGS_RELEASE=-MT"
+    >
+    LOG_BUILD ON
+    LOG_CONFIGURE ON
+    BUILD_COMMAND
+      ${CMAKE_COMMAND}
+      --build .
+      --config $<CONFIG>
+      $<$<VERSION_GREATER_EQUAL:${CMAKE_VERSION},3.12>:--parallel ${ep_procs}>
+    TEST_COMMAND ""
+    INSTALL_COMMAND ""
+    BUILD_BYPRODUCTS
+      <BINARY_DIR>/lib/api/libwasmedge_c_${CMAKE_DEBUG_POSTFIX}.so
+  )
+  ExternalProject_Get_Property (wasmedge_src BINARY_DIR)
+  set (wasmedge_src_BINARY_DIR "${BINARY_DIR}")
+  add_dependencies (wasmedge wasmedge_src)
+  target_include_directories (ripple_libs SYSTEM INTERFACE "${wasmedge_src_BINARY_DIR}/include/api")
+  target_link_libraries (wasmedge
+    INTERFACE
+      Boost::thread
+      Boost::system)
+  target_link_libraries (wasmedge INTERFACE
+      "${wasmedge_src_BINARY_DIR}/lib/api/libwasmedge_c${CMAKE_DEBUG_POSTFIX}.so")
+  target_link_libraries (ripple_libs INTERFACE wasmedge)
+  if (CMAKE_BUILD_TYPE STREQUAL "Debug")
+    set(CMAKE_DEBUG_POSTFIX ${OLD_DEBUG_POSTFIX})
+  endif ()
+endif ()

CMakeLists.txt

@@ -57,6 +57,7 @@ include(deps/Protobuf)
 include(deps/gRPC)
 include(deps/cassandra)
 include(deps/Postgres)
+include(deps/WasmEdge)
 
 ###