From 5d2da76c1ee70ffd1f027365c0f3af74b76fd382 Mon Sep 17 00:00:00 2001
From: Li Xinwei <1326710505@qq.com>
Date: Mon, 19 Apr 2021 16:04:03 +0800
Subject: [PATCH] make FindWrapBrotli.cmake not depend on vcpkg or PkgConfig

Currently, FindWrapBrotli.cmake depends on vcpkg or PkgConfig. But for
users who build Brotli by themselves and don't have vcpkg or PkgConfig,
the Brotli cannot be found.

As a reference, I use following CMake commands to build Brotli:
cmake path/to/Brotli/source -G"Ninja Multi-Config"
-DCMAKE_CONFIGURATION_TYPES=Release;Debug -DCMAKE_CROSS_CONFIGS=all
-DCMAKE_DEFAULT_CONFIGS=all -DCMAKE_DEBUG_POSTFIX=d
-DCMAKE_INSTALL_PREFIX=path/to/install

Pick-to: 6.1
Change-Id: I2fa8d3293dd55ebc18937e13fac40d144ca4c1e2
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
---
 cmake/FindWrapBrotli.cmake | 47 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/cmake/FindWrapBrotli.cmake b/cmake/FindWrapBrotli.cmake
index e01deee6e38..524cb425e4f 100644
--- a/cmake/FindWrapBrotli.cmake
+++ b/cmake/FindWrapBrotli.cmake
@@ -39,5 +39,52 @@ else()
             target_link_libraries(WrapBrotli::WrapBrotliCommon INTERFACE PkgConfig::libbrotlicommon)
             set(WrapBrotli_FOUND ON)
         endif()
+    else()
+        find_path(BROTLI_INCLUDE_DIR NAMES "brotli/decode.h")
+
+        foreach(lib_name BrotliDec BrotliEnc BrotliCommon)
+            string(TOLOWER ${lib_name} lower_lib_name)
+
+            find_library(${lib_name}_LIBRARY_RELEASE
+                         NAMES ${lower_lib_name} ${lower_lib_name}-static)
+
+            find_library(${lib_name}_LIBRARY_DEBUG
+                         NAMES ${lower_lib_name}d ${lower_lib_name}-staticd
+                         ${lower_lib_name} ${lower_lib_name}-static)
+
+            include(SelectLibraryConfigurations)
+            select_library_configurations(${lib_name})
+
+            if (BROTLI_INCLUDE_DIR AND ${lib_name}_LIBRARY)
+                set(${lib_name}_FOUND TRUE)
+            endif()
+
+            if (${lib_name}_FOUND AND NOT TARGET WrapBrotli::Wrap${lib_name})
+                add_library(WrapBrotli::Wrap${lib_name} UNKNOWN IMPORTED)
+                set_target_properties(WrapBrotli::Wrap${lib_name} PROPERTIES
+                                      INTERFACE_INCLUDE_DIRECTORIES "${BROTLI_INCLUDE_DIR}"
+                                      IMPORTED_LOCATION "${${lib_name}_LIBRARY}")
+
+                if(${lib_name}_LIBRARY_RELEASE)
+                    foreach(config_name RELEASE RELWITHDEBINFO MINSIZEREL)
+                        set_property(TARGET WrapBrotli::Wrap${lib_name} APPEND PROPERTY
+                                     IMPORTED_CONFIGURATIONS ${config_name})
+                        set_target_properties(WrapBrotli::Wrap${lib_name} PROPERTIES
+                                              IMPORTED_LOCATION_${config_name} "${${lib_name}_LIBRARY_RELEASE}")
+                    endforeach()
+                endif()
+
+                if(${lib_name}_LIBRARY_DEBUG)
+                    set_property(TARGET WrapBrotli::Wrap${lib_name} APPEND PROPERTY
+                                 IMPORTED_CONFIGURATIONS DEBUG)
+                    set_target_properties(WrapBrotli::Wrap${lib_name} PROPERTIES
+                                          IMPORTED_LOCATION_DEBUG "${${lib_name}_LIBRARY_DEBUG}")
+                endif()
+            endif()
+        endforeach()
+
+        include(FindPackageHandleStandardArgs)
+        find_package_handle_standard_args(WrapBrotli REQUIRED_VARS
+                                          BrotliDec_FOUND BrotliEnc_FOUND BrotliCommon_FOUND)
     endif()
 endif()