meson.build: attempt to detect WildMidi using pkg-config

The WildMidi project added the pkg-config file in version 0.3.3, but unfortunately, Debian still doesn't ship it 4 years later: https://bugs.debian.org/916631 However, for cross-compiling, the pkg-config file is very helpful.

meson.build: attempt to detect WildMidi using pkg-config
69f09648 · Max Kellermann · 9adda30c · 69f09648 · 69f09648
Commit 69f09648 authored May 27, 2020 by Max Kellermann
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NEWS NEWS +2 -0

meson.build src/decoder/plugins/meson.build +6 -1

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--- a/NEWS
+++ b/NEWS
@@ -3,6 +3,8 @@ ver 0.21.24 (not yet released)
  - "tagtypes" requires no permissions
 * database
  - simple: fix crash when mounting twice
+* decoder
+  - wildmidi: attempt to detect WildMidi using pkg-config
 * Android
  - fix build failure with Android NDK r21
 * Windows

--- a/src/decoder/plugins/meson.build
+++ b/src/decoder/plugins/meson.build
@@ -129,7 +129,12 @@ if wavpack_dep.found()
  decoder_plugins_sources += 'WavpackDecoderPlugin.cxx'
 endif

-wildmidi_dep = c_compiler.find_library('WildMidi', required: get_option('wildmidi'))
+if not get_option('wildmidi').disabled()
+  wildmidi_dep = dependency('wildmidi', required: get_option('wildmidi'))
+endif
+if not wildmidi_dep.found()
+  wildmidi_dep = c_compiler.find_library('WildMidi', required: get_option('wildmidi'))
+endif
 conf.set('ENABLE_WILDMIDI', wildmidi_dep.found())
 if wildmidi_dep.found()
  decoder_plugins_sources += 'WildmidiDecoderPlugin.cxx'