Fix strict prototype warnings

src/fluidsynth.c

@@ -1228,14 +1228,14 @@ int main(int argc, char **argv)
  * print_usage
  */
 void
-print_usage()
+print_usage(void)
 {
     fprintf(stderr, "Usage: fluidsynth [options] [soundfonts]\n");
     fprintf(stderr, "Try -h for help.\n");
 }
 
 void
-print_welcome()
+print_welcome(void)
 {
     printf("FluidSynth runtime version %s\n"
            "Copyright (C) 2000-2024 Peter Hanappe and others.\n"
@@ -1244,7 +1244,7 @@ print_welcome()
            fluid_version_str());
 }
 
-void print_configure()
+void print_configure(void)
 {
     puts("FluidSynth executable version " FLUIDSYNTH_VERSION);
     puts("Sample type="

src/gentables/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.5)
 
 # remove $CC from the current environment and by that force cmake to look for a (working) C compiler,
 # which hopefully will be the host compiler

src/midi/fluid_midi.c

@@ -1068,7 +1068,7 @@ fluid_midi_file_get_division(fluid_midi_file *midifile)
  * @return New MIDI event structure or NULL when out of memory.
  */
 fluid_midi_event_t *
-new_fluid_midi_event()
+new_fluid_midi_event(void)
 {
     fluid_midi_event_t *evt;
     evt = FLUID_NEW(fluid_midi_event_t);
@@ -2702,7 +2702,7 @@ int fluid_player_get_midi_tempo(fluid_player_t *player)
  * new_fluid_midi_parser
  */
 fluid_midi_parser_t *
-new_fluid_midi_parser()
+new_fluid_midi_parser(void)
 {
     fluid_midi_parser_t *parser;
     parser = FLUID_NEW(fluid_midi_parser_t);

src/synth/fluid_mod.c

@@ -480,7 +480,7 @@ fluid_mod_get_value(fluid_mod_t *mod, fluid_voice_t *voice)
  * @return New allocated modulator or NULL if out of memory
  */
 fluid_mod_t *
-new_fluid_mod()
+new_fluid_mod(void)
 {
     fluid_mod_t *mod = FLUID_NEW(fluid_mod_t);
 
@@ -511,7 +511,7 @@ delete_fluid_mod(fluid_mod_t *mod)
  *
  * Useful in low latency scenarios e.g. to allocate a modulator on the stack.
  */
-size_t fluid_mod_sizeof()
+size_t fluid_mod_sizeof(void)
 {
     return sizeof(fluid_mod_t);
 }