Fix vcpkg builds (#7702)

* Try to fix MSVC linker error related to lilv

* Remove temporary workaround

* Temporary debugging messages

* oops

* Temporary debugging

* Try to find FluidSynth using Config mode first

* Try again to fix lilv

* Fix FluidSynth installed with vcpkg on Windows

* Fix lilv from vcpkg

* Remove debug flag

* Fix for when lilv is not found (*-NOTFOUND evaluates to false)

* Use lowercase package name for lv2

* Try using only pkg_check_modules for lv2

* Use Lilv::lilv

* Add pkg-config guard back in

* Fix package name

Co-authored-by: Tres Finocchiaro <tres.finocchiaro@gmail.com>

* Fix Lilv_INCLUDE_DIRS

* Rename vcpkg cache key

---------

Co-authored-by: Tres Finocchiaro <tres.finocchiaro@gmail.com>

cmake/modules/FindFluidSynth.cmake

@@ -22,7 +22,7 @@ find_path(FluidSynth_INCLUDE_DIR
 )
 
 find_library(FluidSynth_LIBRARY
-	NAMES "fluidsynth"
+	NAMES "fluidsynth" "fluidsynth-3" "fluidsynth-2" "fluidsynth-1"
 	HINTS ${FLUIDSYNTH_PKG_LIBRARY_DIRS}
 )
 

cmake/modules/FindLilv.cmake

@@ -0,0 +1,19 @@
+# Copyright (c) 2025 Dalton Messmer <messmer.dalton/at/gmail.com>
+#
+# Redistribution and use is allowed according to the terms of the New BSD license.
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+include(ImportedTargetHelpers)
+
+find_package_config_mode_with_fallback(Lilv Lilv::lilv
+	LIBRARY_NAMES "lilv" "lilv-0"
+	INCLUDE_NAMES "lilv/lilv.h"
+	PKG_CONFIG "lilv-0"
+)
+
+include(FindPackageHandleStandardArgs)
+
+find_package_handle_standard_args(Lilv
+	REQUIRED_VARS Lilv_LIBRARY Lilv_INCLUDE_DIRS
+	VERSION_VAR Lilv_VERSION
+)