Add poco.

ports/poco/CONTROL

@@ -0,0 +1,4 @@
+Source: poco
+Version: 1.7.6
+Build-Depends: openssl, libmariadb
+Description: Modern, powerful open source C++ class libraries for building network and internet-based applications that run on desktop, server, mobile and embedded systems.

ports/poco/config_h.patch

@@ -0,0 +1,13 @@
+diff --git a/Foundation/include/Poco/Config.h b/Foundation/include/Poco/Config.h
+index 003b6dc..55b8eed 100644
+--- a/Foundation/include/Poco/Config.h
++++ b/Foundation/include/Poco/Config.h
+@@ -31,7 +31,7 @@
+ 
+ 
+ // Define to disable implicit linking
+-// #define POCO_NO_AUTOMATIC_LIBS
++#define POCO_NO_AUTOMATIC_LIBS
+ 
+ 
+ // Define to disable automatic initialization

ports/poco/portfile.cmake

@@ -0,0 +1,66 @@
+include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/poco-1.7.6-all)
+
+vcpkg_download_distfile(ARCHIVE
+    URLS "https://pocoproject.org/releases/poco-1.7.6/poco-1.7.6-all.zip"
+    FILENAME "poco-1.7.6-all.zip"
+    SHA512 ed15c6ab69157d3caf3f5fcd861396ddbe3a98c1f3d513c2670e81601c176fb17549791836bd50014d9fb58aa3983e262312848f197e9c487af962cc27556df5
+)
+vcpkg_extract_source_archive(${ARCHIVE})
+
+vcpkg_apply_patches(
+    SOURCE_PATH ${SOURCE_PATH}
+    PATCHES
+		${CMAKE_CURRENT_LIST_DIR}/config_h.patch
+)
+
+if (VCPKG_LIBRARY_LINKAGE STREQUAL static)
+	set(POCO_STATIC ON)
+	set(POCO_MT     ON)
+endif()
+
+vcpkg_configure_cmake(
+    SOURCE_PATH ${SOURCE_PATH}
+	OPTIONS
+		-DPOCO_STATIC=${POCO_STATIC}
+		-DPOCO_MT=${POCO_MT}
+		
+		-DFORCE_OPENSSL=ON
+		-DENABLE_TESTS=OFF
+		-DENABLE_MSVC_MP=ON
+		-DPOCO_UNBUNDLED=OFF # OFF means: using internal copy of sqlite, libz, pcre, expat, ...
+)
+
+vcpkg_install_cmake()
+
+file(MAKE_DIRECTORY ${CURRENT_PACKAGES_DIR}/tools)
+file(RENAME ${CURRENT_PACKAGES_DIR}/bin/cpspc.exe ${CURRENT_PACKAGES_DIR}/tools/cpspc.exe)
+file(RENAME ${CURRENT_PACKAGES_DIR}/bin/f2cpsp.exe ${CURRENT_PACKAGES_DIR}/tools/f2cpsp.exe)
+
+if (VCPKG_LIBRARY_LINKAGE STREQUAL static)
+	file(REMOVE_RECURSE 
+		${CURRENT_PACKAGES_DIR}/bin
+		${CURRENT_PACKAGES_DIR}/debug/bin)
+endif()
+
+file(REMOVE 
+	${CURRENT_PACKAGES_DIR}/bin/cpspc.pdb
+	${CURRENT_PACKAGES_DIR}/bin/f2cpsp.pdb
+	${CURRENT_PACKAGES_DIR}/debug/bin/cpspc.exe
+	${CURRENT_PACKAGES_DIR}/debug/bin/cpspc.pdb
+	${CURRENT_PACKAGES_DIR}/debug/bin/f2cpsp.exe
+	${CURRENT_PACKAGES_DIR}/debug/bin/f2cpsp.pdb)
+
+file(REMOVE
+	${CURRENT_PACKAGES_DIR}/bin/vcruntime140.dll
+	${CURRENT_PACKAGES_DIR}/bin/msvcp140.dll
+	${CURRENT_PACKAGES_DIR}/debug/bin/vcruntime140.dll
+	${CURRENT_PACKAGES_DIR}/debug/bin/msvcp140.dll)
+
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/lib/cmake)
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/lib/cmake)
+
+# copy license
+file(COPY ${SOURCE_PATH}/LICENSE DESTINATION ${CURRENT_PACKAGES_DIR}/share/poco)
+file(RENAME ${CURRENT_PACKAGES_DIR}/share/poco/LICENSE ${CURRENT_PACKAGES_DIR}/share/poco/copyright)