[glad] inital commit

ports/glad/CONTROL

@@ -0,0 +1,3 @@
+Source: glad
+Version: 0.1.28
+Description: Multi-Language Vulkan/GL/GLES/EGL/GLX/WGL Loader-Generator based on the official specs.

ports/glad/portfile.cmake

@@ -0,0 +1,32 @@
+include(vcpkg_common_functions)
+
+vcpkg_check_linkage(ONLY_STATIC_LIBRARY)
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO Dav1dde/glad
+    REF v0.1.28
+    SHA512 5895e25bffab4ead346f65011cbb52a434779fed1dad619ffde27f68b52994cd0b048a45b4533b22b54971dfdba935d93fcf6bee5789061d0057af869b95998c
+    HEAD_REF master
+)
+
+vcpkg_configure_cmake(
+    SOURCE_PATH ${SOURCE_PATH}
+    PREFER_NINJA
+    OPTIONS
+        -DGLAD_NO_LOADER=OFF
+        -DGLAD_EXPORT=OFF
+        -DGLAD_INSTALL=ON
+        -DGLAD_REPRODUCIBLE=ON
+        -DGLAD_SPEC="gl" # {gl,egl,glx,wgl}
+        -DGLAD_PROFILE="compatibility" # {core,compatibility}
+    OPTIONS_DEBUG
+        -DGLAD_GENERATOR="c-debug"
+)
+
+vcpkg_install_cmake()
+vcpkg_copy_pdbs()
+vcpkg_fixup_cmake_targets(CONFIG_PATH lib/cmake/glad)
+
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
+configure_file(${SOURCE_PATH}/LICENSE ${CURRENT_PACKAGES_DIR}/share/glad/copyright COPYONLY)