File system-fluidsynth.patch of Package zmusic

From: Jan Engelhardt <jengelh@inai.de>
Date: 2022-11-24 00:30:41.636640680 +0100
Subject: Disintegrate the bundled libfluidsynth

Do a partial revert of this commit:

"""
commit 47475495f43c0e9fed55fbe861cf2cb94628f39c
Author: Christoph Oelckers <coelckers@users.noreply.github.com>
Date:   Sun Jul 31 12:12:11 2022 +0200

    - integrate FluidSynth directly into the project in source form.
    
    The primary reason for this is to avoid dealing with FluidSynth's rather messy compile setup.
    This also protects us from breaking API/ABI changes like between version 1 and 2.
"""

The primary reason for this revert is to avoid dealing with
FluidSynth's rather messy compile setup. Because it's already done in
the distro's fluidsynth package and need not be repeated for zmusic.

---
 source/CMakeLists.txt                              |    7 +++++--
 source/mididevices/music_fluidsynth_mididevice.cpp |    2 +-
 thirdparty/CMakeLists.txt                          |    1 -
 3 files changed, 6 insertions(+), 4 deletions(-)

Index: source/CMakeLists.txt
===================================================================
--- source/CMakeLists.txt.orig
+++ source/CMakeLists.txt
@@ -142,8 +142,11 @@ use_fast_math(zmusiclite)
 target_include_directories(zmusic INTERFACE $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${ZMusic_SOURCE_DIR}/include>)
 target_include_directories(zmusiclite INTERFACE $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${ZMusic_SOURCE_DIR}/include>)
 
-target_link_libraries_hidden(zmusic zmusic-obj adl oplsynth opn timidity timidityplus wildmidi fluidsynth)
-target_link_libraries_hidden(zmusiclite zmusic-obj fluidsynth)
+include(FindPkgConfig)
+pkg_search_module(FLUIDSYNTH REQUIRED fluidsynth)
+target_include_directories(zmusic-obj INTERFACE ${FLUIDSYNTH_INCLUDE_DIRS})
+target_link_libraries_hidden(zmusic zmusic-obj adl oplsynth opn timidity timidityplus wildmidi ${FLUIDSYNTH_LIBRARIES})
+target_link_libraries_hidden(zmusiclite zmusic-obj ${FLUIDSYNTH_LIBRARIES})
 
 target_compile_definitions(zmusic PUBLIC $<$<STREQUAL:$<TARGET_PROPERTY:zmusic,TYPE>,STATIC_LIBRARY>:ZMUSIC_STATIC>)
 target_compile_definitions(zmusiclite PRIVATE ZMUSIC_LITE=1 PUBLIC $<$<STREQUAL:$<TARGET_PROPERTY:zmusiclite,TYPE>,STATIC_LIBRARY>:ZMUSIC_STATIC>)
Index: source/mididevices/music_fluidsynth_mididevice.cpp
===================================================================
--- source/mididevices/music_fluidsynth_mididevice.cpp.orig
+++ source/mididevices/music_fluidsynth_mididevice.cpp
@@ -46,7 +46,7 @@
 
 FluidConfig fluidConfig;
 
-#include "../thirdparty/fluidsynth/include/fluidsynth.h"
+#include <fluidsynth.h>
 
 class FluidSynthMIDIDevice : public SoftSynthMIDIDevice
 {
Index: thirdparty/CMakeLists.txt
===================================================================
--- thirdparty/CMakeLists.txt.orig
+++ thirdparty/CMakeLists.txt
@@ -45,4 +45,3 @@ add_subdirectory(timidity)
 add_subdirectory(timidityplus)
 add_subdirectory(wildmidi)
 add_subdirectory(oplsynth)
-add_subdirectory(fluidsynth/src)