feat: use jerryscripts default port implementation

Author: alandefreitas

docs/modules/ROOT/pages/install.adoc

@@ -121,12 +121,11 @@ Patch the JerryScript source with our CMake shim and install it:
 tar -xf jerryscript-3.0.0.tar.gz <.>
 cp ../mrdocs/third-party/patches/jerryscript/CMakeLists.txt ./jerryscript-3.0.0/CMakeLists.txt <.>
 cp ../mrdocs/third-party/patches/jerryscript/jerryscriptConfig.cmake.in ./jerryscript-3.0.0/jerryscriptConfig.cmake.in <.>
-cp ../mrdocs/third-party/patches/jerryscript/port.c ./jerryscript-3.0.0/port.c <.>
 cd jerryscript-3.0.0
 
 cmake -S . -B ./build -DCMAKE_BUILD_TYPE=Release \
   -DJERRY_PROFILE=es.next -DJERRY_CMDLINE=OFF -DJERRY_TESTS=OFF -DJERRY_DEBUGGER=OFF \
-  -DJERRY_SNAPSHOT_SAVE=OFF -DJERRY_SNAPSHOT_EXEC=OFF -DJERRY_PORT_DEFAULT=ON \
+  -DJERRY_SNAPSHOT_SAVE=OFF -DJERRY_SNAPSHOT_EXEC=OFF \
   -DJERRY_MEM_STATS=OFF -DJERRY_PARSER_STATS=OFF -DJERRY_LINE_INFO=OFF \
   -DJERRY_LTO=OFF -DJERRY_LIBC=OFF -DCMAKE_MSVC_RUNTIME_LIBRARY=MultiThreadedDLL
 cmake --build ./build --config Release
@@ -135,7 +134,9 @@ cmake --install ./build --prefix ./install
 
 <.> Extracts the `JerryScript` source code.
 <.> Adds CMake packaging files maintained in this repository.
-<.> Provides the port layer and CMake config used by MrDocs.
+
+The build uses JerryScript's upstream default port implementation; no custom
+`port.c` from MrDocs is required.
 
 === Libxml2
 

third-party/patches/jerryscript/CMakeLists.txt

@@ -1,5 +1,5 @@
 # Minimal CMake packaging wrapper for JerryScript
-# Builds a static jerry-core with ES.next profile, no tools/debugger/snapshots, and a custom port layer for MrDocs.
+# Builds a static jerry-core with ES.next profile, no tools/debugger/snapshots, and reuses the upstream default port.
 
 cmake_minimum_required(VERSION 3.16)
 project(jerryscript VERSION 3.0.0 LANGUAGES C)
@@ -18,7 +18,21 @@ option(JERRY_PARSER_STATS "Enable parser statistics" OFF)
 option(JERRY_LINE_INFO "Enable line info" OFF)
 option(JERRY_LTO "Enable LTO" OFF)
 option(JERRY_LIBC "Use bundled libc" OFF)
-option(JERRY_PORT_DEFAULT "Use default port implementation" ON)
+option(JERRY_PORT "Build default port implementation" ON)
+
+# Minimal platform/compiler detection to satisfy jerry-port CMake expectations.
+set(PLATFORM "${CMAKE_SYSTEM_NAME}")
+string(TOUPPER "${PLATFORM}" PLATFORM)
+
+if(MSVC)
+    set(USING_MSVC 1)
+endif()
+if(CMAKE_C_COMPILER_ID MATCHES "GNU")
+    set(USING_GCC 1)
+endif()
+if(CMAKE_C_COMPILER_ID MATCHES "Clang")
+    set(USING_CLANG 1)
+endif()
 
 if (MSVC AND NOT DEFINED CMAKE_MSVC_RUNTIME_LIBRARY)
     set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreadedDLL" CACHE STRING "" FORCE)
@@ -27,22 +41,27 @@ endif()
 # Upstream expects an amalgam target; stub it.
 add_custom_target(amalgam)
 
-add_library(jerryscript-port STATIC port.c)
-target_include_directories(jerryscript-port PUBLIC
-    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/jerry-core/include>
-    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
-
 add_subdirectory(jerry-core)
+if (JERRY_PORT)
+    add_subdirectory(jerry-port)
+endif()
 
 set_target_properties(jerry-core PROPERTIES POSITION_INDEPENDENT_CODE ON)
 set_target_properties(jerry-core PROPERTIES
     INTERFACE_INCLUDE_DIRECTORIES "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/jerry-core/include>;$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"
 )
-target_link_libraries(jerry-core jerryscript-port)
+if (TARGET jerry-port)
+    target_link_libraries(jerry-core jerry-port)
+endif()
 
 add_library(jerryscript ALIAS jerry-core)
 
-install(TARGETS jerry-core jerryscript-port
+set(_install_targets jerry-core)
+if (TARGET jerry-port)
+    list(APPEND _install_targets jerry-port)
+endif()
+
+install(TARGETS ${_install_targets}
     EXPORT jerryscriptTargets
     ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
     LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}

third-party/patches/jerryscript/port.c

@@ -22,7 +22,7 @@
         "-DJERRY_SNAPSHOT_EXEC=OFF",
         "-DJERRY_CMDLINE=OFF",
         "-DJERRY_TESTS=OFF",
-        "-DJERRY_PORT_DEFAULT=ON",
+        "-DJERRY_PORT=ON",
         "-DJERRY_MEM_STATS=OFF",
         "-DJERRY_PARSER_STATS=OFF",
         "-DJERRY_LINE_INFO=OFF",