add findlibzip.cmake

cmake/FindLibZip.cmake

@@ -0,0 +1,49 @@
+# CMake module to search for libzip
+#
+# Once done this will define
+#
+#  LIBZIP_FOUND - system has the zip library
+#  LIBZIP_INCLUDE_DIRS - the zip include directories
+#  LIBZIP_LIBRARY - Link this to use the zip library
+#
+# Copyright (c) 2017, Paul Blottiere, <paul.blottiere@oslandia.com>
+# Copyright (c) 2017, Larry Shaffer, <lshaffer (at) boundlessgeo (dot) com>
+#   Add support for finding zipconf.h in separate location, e.g. on macOS
+#
+# Redistribution and use is allowed according to the terms of the BSD license.
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+FIND_PATH(LIBZIP_INCLUDE_DIR
+  zip.h
+  "$ENV{LIB_DIR}/include"
+  "$ENV{INCLUDE}"
+  /usr/local/include
+  /usr/include
+)
+
+FIND_PATH(LIBZIP_CONF_INCLUDE_DIR
+  zipconf.h
+  "$ENV{LIB_DIR}/include"
+  "$ENV{LIB_DIR}/lib/libzip/include"
+  "$ENV{LIB}/lib/libzip/include"
+  /usr/local/lib/libzip/include
+  /usr/lib/libzip/include
+  /usr/local/include
+  /usr/include
+  "$ENV{INCLUDE}"
+)
+
+FIND_LIBRARY(LIBZIP_LIBRARY NAMES zip PATHS "$ENV{LIB_DIR}/lib" "$ENV{LIB}" /usr/local/lib /usr/lib )
+
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(LibZip DEFAULT_MSG
+                                  LIBZIP_LIBRARY LIBZIP_INCLUDE_DIR LIBZIP_CONF_INCLUDE_DIR)
+
+SET(LIBZIP_INCLUDE_DIRS ${LIBZIP_INCLUDE_DIR} ${LIBZIP_CONF_INCLUDE_DIR})
+MARK_AS_ADVANCED(LIBZIP_LIBRARY LIBZIP_INCLUDE_DIR LIBZIP_CONF_INCLUDE_DIR LIBZIP_INCLUDE_DIRS)
+
+IF (LIBZIP_FOUND)
+  MESSAGE(STATUS "Found libzip: ${LIBZIP_LIBRARY}")
+ELSE (LIPZIP_FOUND)
+  MESSAGE(FATAL_ERROR "Could not find libzip")
+ENDIF (LIBZIP_FOUND)