add manually created fft.c file

ext/Soundpipe/.gitignore

@@ -13,7 +13,6 @@ examples/plot.dat
 examples/*.bin
 config.mk
 test/*.bin
-lib/fft/fft.c
 
 # Generated files
 util/wav2smp

ext/Soundpipe/lib/meson.build

@@ -18,7 +18,6 @@
 soundpipe_lib_files = files([
   join_paths ('dr_wav', 'dr_wav.c'),
   join_paths ('fft', 'fft.c'),
-  join_paths ('fft', 'fftlib.c'),
   join_paths ('inih', 'ini.c'),
   join_paths ('kissfft', 'kiss_fft.c'),
   join_paths ('kissfft', 'kiss_fftr.c'),

ext/Soundpipe/meson.build

@@ -15,15 +15,6 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with ZPlugins.  If not, see <https://www.gnu.org/licenses/>.
 
-# things that need to be built before
-pre_soundpipe = custom_target (
-  'pre-soundpipe',
-  output: 'pre-soundpipe',
-  command: [
-    'cd', meson.current_source_dir (), '&&',
-    'CC=' + cc.get_id (), 'make',
-    ])
-
 subdir('modules')
 subdir('lib')
 
@@ -31,7 +22,6 @@ soundpipe_lib = static_library (
   'soundpipe-lib',
   soundpipe_lib_files,
   soundpipe_module_files,
-  pre_soundpipe,
   include_directories: [
     'h',
     join_paths ('lib', 'dr_wav'),