[libunifex] create a new port

ports/libunifex/allow-warnings.patch

@@ -0,0 +1,15 @@
+diff --git a/cmake/unifex_env.cmake b/cmake/unifex_env.cmake
+index cb99ae4..9825532 100644
+--- a/cmake/unifex_env.cmake
++++ b/cmake/unifex_env.cmake
+@@ -21,8 +21,8 @@ endif()
+
+ if (MSVC)
+     # warning level 3 and all warnings as errors
+-    add_compile_options(/W3 /WX)
++    add_compile_options(/W3)
+ else()
+     # lots of warnings and all warnings as errors
+-    add_compile_options(-Wall -Wextra -pedantic -Werror)
++    add_compile_options(-Wall -Wextra -pedantic)
+ endif()

ports/libunifex/fix-install.patch

@@ -0,0 +1,33 @@
+diff --git a/source/CMakeLists.txt b/source/CMakeLists.txt
+index 3f25517..3c34a54 100644
+--- a/source/CMakeLists.txt
++++ b/source/CMakeLists.txt
+@@ -67,10 +67,27 @@ configure_file(
+ target_include_directories(unifex
+   PUBLIC
+     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../include/>
+-    "${PROJECT_BINARY_DIR}/include")
++    $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/include>
++)
+
+ target_compile_features(unifex PUBLIC cxx_std_17)
+
+ if(CXX_COROUTINES_HAVE_COROUTINES)
+   target_link_libraries(unifex PUBLIC std::coroutines)
+ endif()
++
++install(DIRECTORY ${PROJECT_SOURCE_DIR}/include/unifex
++        DESTINATION include
++)
++install(FILES ${PROJECT_BINARY_DIR}/include/unifex/config.hpp
++        DESTINATION include/unifex
++)
++
++install(TARGETS unifex
++  EXPORT unifex-config
++  DESTINATION lib
++)
++install(EXPORT unifex-config
++  NAMESPACE unofficial::
++  DESTINATION lib/cmake/unifex
++)

ports/libunifex/portfile.cmake

@@ -0,0 +1,40 @@
+vcpkg_check_linkage(ONLY_STATIC_LIBRARY)
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO facebookexperimental/libunifex
+    REF e36b43834329acc75f99910316d3ecec15c0f665
+    SHA512 58f738b49d18982fd3916500c78e8090a266738ec4a8ba416b004fa2c7db718db5ce0e27f5e4e22eaddcc27c8d1618bcb2bc080eee1a31d98543e2595ccc1135
+    HEAD_REF master
+    PATCHES
+        fix-install.patch
+        allow-warnings.patch
+)
+
+vcpkg_check_features(OUT_FEATURE_OPTIONS FEATURE_OPTIONS
+    FEATURES
+        test    BUILD_TESTING
+        test    UNIFEX_BUILD_EXAMPLES
+)
+
+vcpkg_cmake_configure(
+    SOURCE_PATH ${SOURCE_PATH}
+    OPTIONS
+        ${FEATURE_OPTIONS}
+)
+vcpkg_cmake_install()
+vcpkg_cmake_config_fixup(PACKAGE_NAME unifex CONFIG_PATH lib/cmake/unifex)
+vcpkg_copy_pdbs()
+
+file(INSTALL ${SOURCE_PATH}/LICENSE.txt
+     DESTINATION ${CURRENT_PACKAGES_DIR}/share/${PORT} RENAME copyright)
+
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include
+                    ${CURRENT_PACKAGES_DIR}/debug/share
+                    ${CURRENT_PACKAGES_DIR}/include/unifex/config.hpp.in
+)
+if(VCPKG_TARGET_IS_WINDOWS)
+    file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/include/unifex/linux)
+elseif(VCPKG_TARGET_IS_LINUX)
+    file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/include/unifex/win32)
+endif()

ports/libunifex/vcpkg.json

@@ -0,0 +1,29 @@
+{
+  "name": "libunifex",
+  "version-date": "2021-08-01",
+  "description": "Unified Executors",
+  "homepage": "https://github.com/facebookexperimental/libunifex",
+  "supports": "linux | windows",
+  "dependencies": [
+    {
+      "name": "liburing",
+      "platform": "linux"
+    },
+    {
+      "name": "vcpkg-cmake",
+      "host": true
+    },
+    {
+      "name": "vcpkg-cmake-config",
+      "host": true
+    }
+  ],
+  "features": {
+    "test": {
+      "description": "Build test/example programs",
+      "dependencies": [
+        "gtest"
+      ]
+    }
+  }
+}

versions/baseline.json

@@ -3684,6 +3684,10 @@
       "baseline": "4.3-0",
       "port-version": 0
     },
+    "libunifex": {
+      "baseline": "2021-08-01",
+      "port-version": 0
+    },
     "libunistring": {
       "baseline": "0.9.10",
       "port-version": 0

versions/l-/libunifex.json

@@ -0,0 +1,9 @@
+{
+  "versions": [
+    {
+      "git-tree": "231324d6953ab65fd5778b171aa84b8132cb01f6",
+      "version-date": "2021-08-01",
+      "port-version": 0
+    }
+  ]
+}