Unbundling of all dependencies which are currently available as system packages
and have not been modified (to our knowledge) by MuseScore.
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -206,7 +206,7 @@ if (BUILD_UNIT_TESTS)
         FULL_DOCS "List XML files outputted by google test."
     )
 
-    add_subdirectory(thirdparty/googletest)
+    find_package(GTest REQUIRED)
 endif(BUILD_UNIT_TESTS)
 
 add_subdirectory(share)
--- a/src/framework/audio/CMakeLists.txt
+++ b/src/framework/audio/CMakeLists.txt
@@ -216,11 +216,18 @@ if (ENABLE_AUDIO_EXPORT)
         ${CMAKE_CURRENT_LIST_DIR}/internal/soundtracks/soundtrackwriter.h
         )
 
-    add_subdirectory(${PROJECT_SOURCE_DIR}/thirdparty/lame lame)
-    add_subdirectory(${PROJECT_SOURCE_DIR}/thirdparty/opusenc opusenc)
-    add_subdirectory(${PROJECT_SOURCE_DIR}/thirdparty/flac flac)
+    pkg_check_modules(lame REQUIRED IMPORTED_TARGET lame)
+    pkg_check_modules(libopusenc REQUIRED IMPORTED_TARGET libopusenc)
+    pkg_check_modules(flac REQUIRED IMPORTED_TARGET flac)
+    pkg_check_modules(flacpp REQUIRED IMPORTED_TARGET flac++)
 
-    set(MODULE_LINK ${MODULE_LINK} lame opusenc flac)
+    set(MODULE_LINK
+        ${MODULE_LINK}
+        PkgConfig::lame
+        PkgConfig::libopusenc
+        PkgConfig::flac
+        PkgConfig::flacpp
+    )
 endif()
 
 if (OS_IS_MAC)
--- a/src/framework/audio/internal/encoders/mp3encoder.cpp
+++ b/src/framework/audio/internal/encoders/mp3encoder.cpp
@@ -22,7 +22,7 @@
 
 #include "mp3encoder.h"
 
-#include "lame.h"
+#include "lame/lame.h"
 
 using namespace mu;
 using namespace mu::audio;
--- a/src/framework/audio/internal/encoders/oggencoder.cpp
+++ b/src/framework/audio/internal/encoders/oggencoder.cpp
@@ -22,7 +22,7 @@
 
 #include "oggencoder.h"
 
-#include "opusenc.h"
+#include "opus/opusenc.h"
 
 #include "log.h"
 
--- a/src/framework/global/CMakeLists.txt
+++ b/src/framework/global/CMakeLists.txt
@@ -105,8 +105,6 @@ set(MODULE_SRC
     ${CMAKE_CURRENT_LIST_DIR}/serialization/xmlstreamreader.h
     ${CMAKE_CURRENT_LIST_DIR}/serialization/xmlstreamwriter.cpp
     ${CMAKE_CURRENT_LIST_DIR}/serialization/xmlstreamwriter.h
-    ${CMAKE_CURRENT_LIST_DIR}/thirdparty//tinyxml/tinyxml2.cpp
-    ${CMAKE_CURRENT_LIST_DIR}/thirdparty//tinyxml/tinyxml2.h
     ${CMAKE_CURRENT_LIST_DIR}/serialization/zipreader.cpp
     ${CMAKE_CURRENT_LIST_DIR}/serialization/zipreader.h
     ${CMAKE_CURRENT_LIST_DIR}/serialization/zipwriter.cpp
@@ -124,6 +122,8 @@ set(MODULE_SRC
     ${CMAKE_CURRENT_LIST_DIR}/concurrency/taskscheduler.h
 )
 
+find_package(tinyxml2 REQUIRED)
+
 if (GLOBAL_NO_INTERNAL)
     set(MODULE_DEF ${MODULE_DEF} -DGLOBAL_NO_INTERNAL)
 else()
@@ -184,6 +184,7 @@ set(MODULE_INCLUDE
 set(MODULE_LINK
     ${FS_LIB}
     ${Z_LIB}
+    tinyxml2::tinyxml2
 )
 
 if (OS_IS_MAC)
--- a/src/framework/global/serialization/xmldom.cpp
+++ b/src/framework/global/serialization/xmldom.cpp
@@ -21,7 +21,7 @@
  */
 #include "xmldom.h"
 
-#include "thirdparty/tinyxml/tinyxml2.h"
+#include <tinyxml2.h>
 
 #include "log.h"
 
--- a/src/framework/global/serialization/xmlstreamreader.cpp
+++ b/src/framework/global/serialization/xmlstreamreader.cpp
@@ -23,7 +23,7 @@
 
 #include <cstring>
 
-#include "thirdparty/tinyxml/tinyxml2.h"
+#include <tinyxml2.h>
 
 #include "log.h"
 
--- a/src/framework/testing/gtest.cmake
+++ b/src/framework/testing/gtest.cmake
@@ -60,7 +60,7 @@ find_package(Qt5 COMPONENTS Core Gui REQ
 target_link_libraries(${MODULE_TEST}
     Qt5::Core
     Qt5::Gui
-    gmock
+    GTest::gmock
     global
     ${MODULE_TEST_LINK}
     )