initial sources for vcpkg support

contrib/vcpkg/portfile.cmake

@@ -0,0 +1,63 @@
+vcpkg_from_github(
+  OUT_SOURCE_PATH SOURCE_PATH
+  REPO microsoft/mimalloc
+  HEAD_REF master
+  
+  # The "REF" can be a commit hash, branch name (dev2), or a version (v2.2.1).
+  # REF "v${VERSION}"
+  REF 3f91c9f937d9a7b26c130393925e7364a26c7880
+
+  # The sha512 is the hash of the tar.gz bundle. 
+  # (To get the sha512, run `./vcpkg install mimalloc --overlay-ports=<dir of this file>` and copy the sha from the error message.)
+  SHA512 bb29283e95786c064ce6fa5a36488dafa85f7e979afe3d8fc1361997c978d13557ed27904dda9b8d29c576ad32d7dff5c674dc60c7a5891224e3f1f56bbae73c
+)
+
+vcpkg_check_features(OUT_FEATURE_OPTIONS FEATURE_OPTIONS
+  FEATURES
+    c           MI_NO_USE_CXX
+    guarded     MI_GUARDED
+    secure      MI_SECURE
+    override    MI_OVERRIDE
+    xmalloc     MI_XMALLOC
+    asm         MI_SEE_ASM    
+)
+string(COMPARE EQUAL "${VCPKG_LIBRARY_LINKAGE}" "static" MI_BUILD_STATIC)
+string(COMPARE EQUAL "${VCPKG_LIBRARY_LINKAGE}" "dynamic" MI_BUILD_SHARED)
+
+vcpkg_cmake_configure(
+  SOURCE_PATH "${SOURCE_PATH}"
+  OPTIONS_RELEASE
+    -DMI_OPT_ARCH=ON
+  OPTIONS
+    -DMI_USE_CXX=ON
+    -DMI_BUILD_TESTS=OFF
+    -DMI_BUILD_OBJECT=ON
+    ${FEATURE_OPTIONS}
+    -DMI_BUILD_STATIC=${MI_BUILD_STATIC}
+    -DMI_BUILD_SHARED=${MI_BUILD_SHARED}
+    -DMI_INSTALL_TOPLEVEL=ON
+)
+
+vcpkg_cmake_install()
+vcpkg_copy_pdbs()
+
+file(COPY
+  "${CMAKE_CURRENT_LIST_DIR}/vcpkg-cmake-wrapper.cmake"
+  "${CMAKE_CURRENT_LIST_DIR}/usage"
+  DESTINATION "${CURRENT_PACKAGES_DIR}/share/${PORT}"
+)
+vcpkg_cmake_config_fixup(CONFIG_PATH lib/cmake/mimalloc)
+
+if(VCPKG_LIBRARY_LINKAGE STREQUAL "dynamic")
+  # todo: why is this needed?
+  vcpkg_replace_string(
+    "${CURRENT_PACKAGES_DIR}/include/mimalloc.h"
+    "!defined(MI_SHARED_LIB)"
+    "0 // !defined(MI_SHARED_LIB)"
+  )
+endif()
+file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/debug/include")
+file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/debug/share")
+
+vcpkg_fixup_pkgconfig()
+vcpkg_install_copyright(FILE_LIST "${SOURCE_PATH}/LICENSE")