it compiles on linux with gcc now

.gitignore

@@ -3,3 +3,5 @@
 *.dll
 reload-trigger
 *.wav
+*.so
+core

ampler.c

@@ -6,10 +6,10 @@
 #include "draw.c"
 
 Ampler_state *init() {
-	Ampler_state *state = malloc(sizeof Ampler_state);
-	SDL_memset(state, 0, sizeof Ampler_state);
+	Ampler_state *state = malloc(sizeof (Ampler_state));
+	SDL_memset(state, 0, sizeof (Ampler_state));
 
-	state -> size = sizeof Ampler_state;
+	state -> size = sizeof (Ampler_state);
 
 	SDL_AudioSpec want = { 0 }, have = { 0 };
 	want.freq = SAMPLE_RATE;
@@ -42,7 +42,7 @@ Ampler_state *init() {
 int ampler_main(SDL_Window *w, SDL_Renderer *r, Ampler_state **u_data) {
 	if *u_data == NULL do *u_data = init();
 
-	u32 old_size = (*u_data) -> size, new_size = sizeof Ampler_state;
+	u32 old_size = (*u_data) -> size, new_size = sizeof(Ampler_state);
 	if old_size < new_size do {
 		printf("increasing size. %i to %i\n", old_size, new_size);
 		Ampler_state *nu = malloc(new_size);

audio.c

@@ -62,7 +62,7 @@ void sound_src_frame(Sound_src *s, s8 *mix[]) {
 
 int audio_frame(Ampler_state *state) {
 	int queued = SDL_GetQueuedAudioSize(state -> playdev);
-	queued /= sizeof s16; // queued is in bytes
+	queued /= sizeof (s16); // queued is in bytes
 
 	if queued > FRAME_SAMPLES * CHANNELS * 2 do return 0;
 	// else puts("queued audio.");
@@ -72,8 +72,8 @@ int audio_frame(Ampler_state *state) {
 	// TODO: We should use CHANNELS here
 	// static s8 mix_l[FRAME_SAMPLES] = { 0 }, mix_r[FRAME_SAMPLES] = { 0 };
 	s8 *mix_l = state->frame_mix[0], *mix_r = state->frame_mix[1];
-	SDL_memset(mix_l, 0, FRAME_SAMPLES / sizeof s8);
-	SDL_memset(mix_r, 0, FRAME_SAMPLES / sizeof s8);
+	SDL_memset(mix_l, 0, FRAME_SAMPLES / sizeof (s8));
+	SDL_memset(mix_r, 0, FRAME_SAMPLES / sizeof (s8));
 
 	s8 *mix[] = { mix_l, mix_r };
 	foreach_ptr(Sound_src, snd, state -> sounds)
@@ -85,7 +85,7 @@ int audio_frame(Ampler_state *state) {
 		for int t = 0; t < CHANNELS; t += 1 do
 			frame[i * CHANNELS + t] = ((s16) (mix[t][i])) * vol;
 
-	if SDL_QueueAudio(state -> playdev, frame, sizeof frame) do
+	if SDL_QueueAudio(state -> playdev, frame, sizeof (frame)) do
 		puts(SDL_GetError());
 
 	return 1; // audio was qued
@@ -115,7 +115,7 @@ void load_sample(Ampler_state *state, const char *file_name) {
 	}
 
 	const int chans = spec.channels;
-	const int length = (bytes / sizeof s16) / chans;
+	const int length = (bytes / sizeof (s16)) / chans;
 
 	snd -> track_len = length;
 	snd -> speed = 1.0f;
@@ -124,7 +124,7 @@ void load_sample(Ampler_state *state, const char *file_name) {
 	snd -> end = snd->track_len;
 	snd -> state = SND_STOPPED;
 	snd -> note_speed = 1.0f; // TODO: Look up a note ?
-	SDL_memset(snd->name, 0, sizeof snd->name);
+	SDL_memset(snd->name, 0, sizeof (snd->name));
 	for int i = 0; i < arraylen(snd->name) - 1; i += 1 do
 		if file_name[i] == '\0' or file_name[i] == '.' do break;
 		else snd->name[i] = file_name[i];

compile-ampler.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+gcc ampler.c udp.c -o ampler.so -shared -lSDL2 -g --std c99 && echo > reload-trigger

compile-core.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+gcc core.c -o core -lSDL2 -g

core.c

@@ -6,11 +6,30 @@
 #define SDL_MAIN_HANDLED
 #include <SDL2/SDL.h>
 
+#ifdef __WIN32__
 # define SHARED_OBJECT "ampler.dll"
+# define SHARED_OBJECT_ACTIVE SHARED_OBJECT "-active.dll"
+#else
+# define SHARED_OBJECT "./ampler.so"
+# define SHARED_OBJECT_ACTIVE SHARED_OBJECT
+#endif
+
 #define SHARED_MAIN "ampler_main"
 
-
-#define SHARED_OBJECT_ACTIVE SHARED_OBJECT "-active.dll"
+#ifdef __WIN32__
+int copy_shared_object() {
+	if (system("copy " SHARED_OBJECT " " SHARED_OBJECT_ACTIVE " /Y")) {
+		puts("failed copying to " SHARED_OBJECT_ACTIVE);
+		// puts(SDL_GetError());
+		return 1;
+	}
+	return 0;
+}
+#else
+int copy_shared_object() {
+	return 0;
+}
+#endif
 
 int main(int argc, char **argv) {
 	puts("start.");
@@ -25,16 +44,10 @@ int main(int argc, char **argv) {
 	r = SDL_CreateRenderer(w, -1,
 		SDL_RENDERER_ACCELERATED | SDL_RENDERER_TARGETTEXTURE);
 
-	//SDL_CreateWindowAndRenderer(
-	//	1080, 480, SDL_WINDOW_RESIZABLE, &w, &r);
-
 	void *u_data = NULL;
 	while (1) {
-		if (system("copy " SHARED_OBJECT " " SHARED_OBJECT_ACTIVE " /Y")) {
-			puts("failed copying to " SHARED_OBJECT_ACTIVE);
-			// puts(SDL_GetError());
+		if (copy_shared_object())
 			break;
-		}
 
 		void *so = SDL_LoadObject(SHARED_OBJECT_ACTIVE);
 		if (so == 0) {

draw.c

@@ -13,7 +13,7 @@ void draw_frame(SDL_Window *w, SDL_Renderer *r, Ampler_state *state) {
 	// TODO: DRAW WITH X SCALE FACTOR
 	// TODO: DRAW SMOLER
 	SDL_SetRenderDrawColor(r, 0xFF, 0x00, 0x4D, 255);
-	const space = (44100 * 8) / 512;
+	const int space = (44100 * 8) / 512;
 	const int t = 0; // TODO: DRAW L / R OVERLAPPED IN DIFF COLORS ?
 	const int wav_h = 128;
 	if 0 do

udp.c

@@ -8,7 +8,14 @@
  * store from ip + port in message ?
 */
 
+#ifdef __WIN32__
 #include <winsock2.h>
+#else
+#include <sys/socket.h>
+#include <sys/select.h>
+#include <sys/time.h>
+#include <unistd.h>
+#endif
 
 #include "ampler.h"
 
@@ -19,8 +26,13 @@
 #undef while
 
 // G l o b a L  E v i L //
+#ifdef __WIN32__
 static SOCKET udp_sock;
+#else
+static int udp_sock;
+#endif
 
+#ifdef __WIN32__
 void udp_init(Ampler_state *state) {
 	// https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-wsastartup
 	WSADATA wsa;
@@ -53,12 +65,24 @@ void udp_init(Ampler_state *state) {
 	if (bind_result == SOCKET_ERROR)
 		printf("error: bind returned SOCKET_ERROR, WSAGetLastError() = %i\n" , WSAGetLastError());
 }
+#else
+void udp_init(Ampler_state *state) {
+	//
+}
+#endif
 
+#ifdef __WIN32__
 void udp_quit(Ampler_state *state) {
 	closesocket(udp_sock);
 	WSACleanup();
 }
+#else
+void udp_quit(Ampler_state *state) {
+	// close(udp_sock);
+}
+#endif
 
+#ifdef __WIN32__
 void recv_packet(Ampler_state *state) {
 	char discard_buf[32] = { 0 }; // for dropped packets
 	char *buf = discard_buf;
@@ -98,7 +122,13 @@ void recv_packet(Ampler_state *state) {
 	if (0) // FOR DEBUGGING
 		printf("%s:%d\t%s\n", from_ip_str, from_port, buf);
 }
+#else
+void recv_packet(Ampler_state *state) {
+	//
+}
+#endif
 
+#ifdef __WIN32__
 void udp_frame(Ampler_state *state) {
 	// https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-select
 	fd_set recv_fd_set;
@@ -133,6 +163,11 @@ void udp_frame(Ampler_state *state) {
 		recv_packet(state);
 	}
 }
+#else
+void udp_frame(Ampler_state *state) {
+	//
+}
+#endif