[mathc] Add new port (microsoft#8394)

ports/mathc/CMakeLists.txt

@@ -0,0 +1,24 @@
+cmake_minimum_required(VERSION 3.14)
+
+project(mathc LANGUAGES C)
+
+include(GNUInstallDirs)
+
+add_library(mathc mathc.c)
+
+target_include_directories(
+    mathc
+    PUBLIC
+        $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+set_target_properties(mathc PROPERTIES PUBLIC_HEADER mathc.h)
+
+install(TARGETS mathc EXPORT unofficial-mathc-config)
+
+install(
+    EXPORT unofficial-mathc-config
+    NAMESPACE unofficial::mathc::
+    DESTINATION share/unofficial-mathc
+    PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
+)

ports/mathc/CONTROL

@@ -0,0 +1,4 @@
+Source: mathc
+Version: 2019-09-29
+Description: Pure C math library for 2D and 3D programming
+Homepage: https://github.com/felselva/mathc

ports/mathc/portfile.cmake

@@ -0,0 +1,30 @@
+include(vcpkg_common_functions)
+
+vcpkg_check_linkage(ONLY_STATIC_LIBRARY)
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO felselva/mathc
+    REF d672725203fc80f6f79fba64533b87d51c32d714
+    SHA512 6db96b7ca9b26745b6ead774b547f6cccdecaef0b55cb766d4f26ae7149bbb72e2bd877cb7994455bd19cae129d014efaf40b50395b1114b7ac95dc6ed53bf34
+    HEAD_REF master
+)
+
+file(COPY ${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt DESTINATION ${SOURCE_PATH})
+
+vcpkg_configure_cmake(
+    SOURCE_PATH ${SOURCE_PATH}
+    PREFER_NINJA
+)
+
+vcpkg_install_cmake()
+
+vcpkg_fixup_cmake_targets(CONFIG_PATH share/unofficial-${PORT} TARGET_PATH share/unofficial-${PORT})
+
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
+
+# Handle copyright
+configure_file(${SOURCE_PATH}/LICENSE ${CURRENT_PACKAGES_DIR}/share/${PORT}/copyright COPYONLY)
+
+# CMake integration test
+vcpkg_test_cmake(PACKAGE_NAME unofficial-${PORT})