cleanup ispc port

cmake/vcpkg_ports/ispc/portfile.cmake

@@ -1,18 +1,17 @@
-set (ISPC_VERSION "1.18.0")
+set(VCPKG_POLICY_EMPTY_INCLUDE_FOLDER enabled)
 
-if (APPLE)
-  set(ISPC_OSSUFFIX "macOS.tar.gz")
-elseif(WIN32)
+if (VCPKG_TARGET_IS_WINDOWS)
   set(ISPC_OSSUFFIX "windows.zip")
   set(ISPC_SHA "97d5d7bba9933f2bcda7374c738ff8a48371487df1720b803767cc9f6fffeaf06424f713360356e7ba57ca7766a1caefe01133a5657cde59ab0bde0e35988409")
-else()
+elseif (VCPKG_TARGET_IS_LINUX)
   set(ISPC_OSSUFFIX "linux.tar.gz")
   set(ISPC_SHA "88f971211f069123a67da7fecdc34ebcf9a04e972928c6d6417c1d0bf4ec5eb3041d3a89df3b241d34cef16f667a9b753b9db4395fca02b75580a34de525a421")
-endif()
-
-set (ISPC_FILENAME "ispc-v${ISPC_VERSION}-${ISPC_OSSUFFIX}")
+else ()
+  message(FATAL_ERROR "Unsupported OS!")
+endif ()
 
-set(ISPC_URL "https://github.com/ispc/ispc/releases/download/v${ISPC_VERSION}/${ISPC_FILENAME}")
+set(ISPC_FILENAME "ispc-v${VERSION}-${ISPC_OSSUFFIX}")
+set(ISPC_URL "https://github.com/ispc/ispc/releases/download/v${VERSION}/${ISPC_FILENAME}")
 
 vcpkg_download_distfile(
   ISPC_ARCHIVE_PATH
@@ -30,10 +29,8 @@ vcpkg_copy_tools(
   SEARCH_DIR "${ISPC_DIR}/bin"
   TOOL_NAMES ispc
 )
-if (WIN32)
+if (VCPKG_TARGET_IS_WINDOWS)
   file(INSTALL ${ISPC_DIR}/bin/ispcrt.dll DESTINATION "${CURRENT_PACKAGES_DIR}/tools/${PORT}")
-endif()
-
-set(VCPKG_POLICY_EMPTY_INCLUDE_FOLDER enabled)
+endif ()
 
 file(INSTALL ${ISPC_DIR}/LICENSE.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/${PORT} RENAME copyright)

cmake/vcpkg_ports/ispc/vcpkg.json

@@ -3,15 +3,5 @@
   "version": "1.18.0",
   "description": "Intel Implicit SPMD Program Compiler",
   "homepage": "https://ispc.github.io",
-  "license": "BSD-3-Clause",
-  "dependencies": [
-    {
-      "name": "vcpkg-cmake",
-      "host": true
-    },
-    {
-      "name": "vcpkg-cmake-config",
-      "host": true
-    }
-  ]
+  "license": "BSD-3-Clause"
 }