cmake/FindLIBDEFLATE.cmake: adding

Author: andrewdavidsmith

cmake/FindLIBDEFLATE.cmake

@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: GPL-3.0-or-later; (c) 2025 Andrew D Smith (author)
+#[=======================================================================[.rst:
+FindLIBDEFLATE
+--------------
+
+Find the native libdeflate includes and library.
+
+#]=======================================================================]
+
+# FindLIBDEFLATE.cmake
+# Custom CMake module to find libdeflate
+
+# Support preference of static libs by adjusting CMAKE_FIND_LIBRARY_SUFFIXES
+# ADS: this is taken from the FindBoost.cmake file
+if(LIBDEFLATE_USE_STATIC_LIBS)
+  set(_libdeflate_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES
+    ${CMAKE_FIND_LIBRARY_SUFFIXES}
+  )
+  if(WIN32)
+    list(INSERT CMAKE_FIND_LIBRARY_SUFFIXES 0 .lib .a)
+  else()
+    set(CMAKE_FIND_LIBRARY_SUFFIXES .a)
+  endif()
+endif()
+
+find_path(LIBDEFLATE_INCLUDE_DIR NAMES libdeflate.h)
+find_library(LIBDEFLATE_LIBRARY NAMES deflate libdeflate)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(LIBDEFLATE
+  REQUIRED_VARS LIBDEFLATE_LIBRARY LIBDEFLATE_INCLUDE_DIR
+  VERSION_VAR LIBDEFLATE_VERSION
+)
+
+if(LIBDEFLATE_FOUND AND NOT TARGET LIBDEFLATE::LIBDEFLATE)
+  add_library(LIBDEFLATE::LIBDEFLATE UNKNOWN IMPORTED)
+  set_target_properties(LIBDEFLATE::LIBDEFLATE PROPERTIES
+    INTERFACE_INCLUDE_DIRECTORIES "${LIBDEFLATE_INCLUDE_DIR}"
+    IMPORTED_LOCATION "${LIBDEFLATE_LIBRARY}"
+  )
+endif()
+
+# Restore the original find library ordering
+# ADS: this is take from the FindBoost.cmake file
+if(LIBDEFLATE_USE_STATIC_LIBS)
+  set(CMAKE_FIND_LIBRARY_SUFFIXES
+    ${_libdeflate_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES}
+  )
+endif()