update code to support brotli

cmake/FindBrotli.cmake

@@ -0,0 +1,224 @@
+# FindBrotli.cmake
+#
+# Supports COMPONENTS:
+#   decoder, encoder, common
+#
+# Exports targets:
+#   Brotli::decoder
+#   Brotli::encoder
+#   Brotli::common
+#
+# Optional variables:
+#   BROTLI_ROOT_DIR
+#   BROTLI_USE_STATIC_LIBS
+
+# ------------------------------------------------------------
+# Version handling (not supported)
+# ------------------------------------------------------------
+if(Brotli_FIND_VERSION)
+  set(_brotli_version_error_msg "FindBrotli.cmake does not support version checking.")
+  if(Brotli_FIND_REQUIRED)
+    message(FATAL_ERROR "${_brotli_version_error_msg}")
+  elseif(NOT Brotli_FIND_QUIETLY)
+    message(WARNING "${_brotli_version_error_msg}")
+  endif()
+endif()
+
+# ------------------------------------------------------------
+# Component dependencies
+# ------------------------------------------------------------
+if(Brotli_FIND_REQUIRED_decoder OR Brotli_FIND_REQUIRED_encoder)
+  set(Brotli_FIND_REQUIRED_common TRUE)
+endif()
+
+# ------------------------------------------------------------
+# Static library preference
+# ------------------------------------------------------------
+if(BROTLI_USE_STATIC_LIBS)
+  set(_brotli_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES})
+  if(WIN32)
+    set(CMAKE_FIND_LIBRARY_SUFFIXES .lib .a)
+  else()
+    set(CMAKE_FIND_LIBRARY_SUFFIXES .a)
+  endif()
+endif()
+
+# ------------------------------------------------------------
+# Optional pkg-config
+# ------------------------------------------------------------
+find_package(PkgConfig QUIET)
+
+# ------------------------------------------------------------
+# Includes
+# ------------------------------------------------------------
+find_path(Brotli_INCLUDE_DIR
+  NAMES
+    brotli/decode.h
+    brotli/encode.h
+  HINTS
+    ${BROTLI_ROOT_DIR}
+  PATH_SUFFIXES
+    include
+    includes
+)
+mark_as_advanced(Brotli_INCLUDE_DIR)
+
+# ------------------------------------------------------------
+# Internal state
+# ------------------------------------------------------------
+set(_brotli_req_vars "")
+
+# For figuring out the real (non-ALIAS) targets when using pkg-config
+set(_brotli_decoder_real_target "")
+set(_brotli_encoder_real_target "")
+set(_brotli_common_real_target "")
+
+if(BROTLI_USE_STATIC_LIBS)
+  set(_brotli_stat_str "_STATIC")
+else()
+  set(_brotli_stat_str "")
+endif()
+
+# ------------------------------------------------------------
+# Components loop
+# ------------------------------------------------------------
+foreach(_listvar "common;common" "decoder;dec" "encoder;enc")
+  list(GET _listvar 0 _component)
+  list(GET _listvar 1 _libname)
+
+  # ---- pkg-config path ----
+  if(PKG_CONFIG_FOUND)
+    if(BROTLI_USE_STATIC_LIBS)
+      pkg_check_modules(
+        Brotli_${_component}_STATIC
+        QUIET
+        GLOBAL
+        IMPORTED_TARGET
+        libbrotli${_libname}
+      )
+    else()
+      pkg_check_modules(
+        Brotli_${_component}
+        QUIET
+        GLOBAL
+        IMPORTED_TARGET
+        libbrotli${_libname}
+      )
+    endif()
+  endif()
+
+  # If pkg-config created an imported target, make our alias to it.
+  if(TARGET PkgConfig::Brotli_${_component}${_brotli_stat_str})
+    add_library(
+      Brotli::${_component}
+      ALIAS
+      PkgConfig::Brotli_${_component}${_brotli_stat_str}
+    )
+
+    # Save the underlying real target name for later linkage fixes
+    set(_brotli_${_component}_real_target "PkgConfig::Brotli_${_component}${_brotli_stat_str}")
+
+    set(Brotli_${_component}_FOUND TRUE)
+
+    if(Brotli_FIND_REQUIRED_${_component})
+      # For FindPackageHandleStandardArgs: ensure libraries are actually present
+      if(BROTLI_USE_STATIC_LIBS)
+        list(APPEND _brotli_req_vars Brotli_${_component}_STATIC_LIBRARIES)
+      else()
+        list(APPEND _brotli_req_vars Brotli_${_component}_LINK_LIBRARIES)
+      endif()
+    endif()
+
+    continue()
+  endif()
+
+  # ---- find_library path ----
+  if(Brotli_FIND_REQUIRED_${_component})
+    list(APPEND _brotli_req_vars Brotli_${_component})
+  endif()
+
+  if(BROTLI_USE_STATIC_LIBS)
+    set(_brotli_names
+      brotli${_libname}-static
+      libbrotli${_libname}-static
+    )
+  else()
+    set(_brotli_names
+      brotli${_libname}
+      libbrotli${_libname}
+    )
+  endif()
+
+  find_library(Brotli_${_component}
+    NAMES ${_brotli_names}
+    HINTS ${BROTLI_ROOT_DIR}
+    PATH_SUFFIXES
+      lib
+      lib64
+      libs
+      libs64
+      lib/x86_64-linux-gnu
+  )
+  mark_as_advanced(Brotli_${_component})
+
+  if(Brotli_${_component})
+    set(Brotli_${_component}_FOUND TRUE)
+
+    add_library(Brotli::${_component} UNKNOWN IMPORTED)
+    set_target_properties(Brotli::${_component} PROPERTIES
+      IMPORTED_LOCATION "${Brotli_${_component}}"
+      INTERFACE_INCLUDE_DIRECTORIES "${Brotli_INCLUDE_DIR}"
+    )
+
+    # In this branch, our target is real (not ALIAS), so it can be linked later.
+    set(_brotli_${_component}_real_target "Brotli::${_component}")
+  else()
+    set(Brotli_${_component}_FOUND FALSE)
+  endif()
+endforeach()
+
+# ------------------------------------------------------------
+# Link decoder/encoder → common (but never on ALIAS targets)
+# ------------------------------------------------------------
+if(_brotli_common_real_target)
+  foreach(_comp decoder encoder)
+    if(_brotli_${_comp}_real_target)
+      # Only link if the target is NOT an ALIAS
+      get_target_property(_aliased ${_brotli_${_comp}_real_target} ALIASED_TARGET)
+      if(NOT _aliased)
+        target_link_libraries(${_brotli_${_comp}_real_target} INTERFACE ${_brotli_common_real_target})
+      endif()
+    endif()
+  endforeach()
+endif()
+
+# ------------------------------------------------------------
+# Aggregate convenience variables
+# ------------------------------------------------------------
+set(Brotli_LIBRARIES "")
+foreach(_comp decoder encoder common)
+  if(TARGET Brotli::${_comp})
+    list(APPEND Brotli_LIBRARIES Brotli::${_comp})
+  endif()
+endforeach()
+
+# ------------------------------------------------------------
+# Final package check (FIXED: use _brotli_req_vars)
+# ------------------------------------------------------------
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Brotli
+  FOUND_VAR
+    Brotli_FOUND
+  REQUIRED_VARS
+    Brotli_INCLUDE_DIR
+    ${_brotli_req_vars}
+  HANDLE_COMPONENTS
+)
+
+# ------------------------------------------------------------
+# Restore suffixes
+# ------------------------------------------------------------
+if(BROTLI_USE_STATIC_LIBS)
+  set(CMAKE_FIND_LIBRARY_SUFFIXES ${_brotli_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES})
+endif()
+