Added a very basic Linux standard library shamelessly stolen from the MacOS one.

Made Linux (almost) work. The generated binaries segfault, but it's so close I can almost taste it.

src/build.c

@@ -153,8 +153,6 @@ String odin_root_dir(void) {
 		if(len == 0) {
 			return make_string(NULL, 0);
 		}
-		printf("build.c:155 | Link value: \"%s\"\n", &path_buf.e[0]);
-		exit(1);
 		if (len < path_buf.count) {
 			break;
 		}

src/gb/gb.h

@@ -3627,7 +3627,7 @@ gb_inline void *gb_memcopy(void *dest, void const *source, isize n) {
 #if defined(_MSC_VER)
 	// TODO(bill): Is this good enough?
 	__movsb(cast(u8 *)dest, cast(u8 *)source, n);
-#elif defined(GB_SYSTEM_OSX)
+#elif defined(GB_SYSTEM_OSX) || defined(GB_SYSTEM_UNIX)
 	// NOTE(zangent): I assume there's a reason this isn't being used elsewhere,
 	//  but I don't see it and I can't seem to get this working any other way.
 	memcpy(dest, source, n);
@@ -4676,7 +4676,8 @@ gb_inline u32 gb_thread_current_id(void) {
 	#else
 		thread_id = GetCurrentThreadId();
 	#endif
-
+#elif defined(GB_SYSTEM_LINUX)
+	thread_id = pthread_self();
 #elif defined(GB_SYSTEM_OSX) && defined(GB_ARCH_64_BIT)
 	thread_id = pthread_mach_thread_np(pthread_self());
 #elif defined(GB_ARCH_32_BIT) && defined(GB_CPU_X86)

src/main.c

@@ -399,10 +399,14 @@ int main(int argc, char **argv) {
 		link_settings = "";
 	}
 
+	printf("Libs: %s\n", lib_str);
+
 	// TODO(zangent): I'm not sure what to do with lib_str.
 	//   I'll have to look at the format that the libraries are listed to determine what to do.
 	lib_str = "";
 
+	
+
 	exit_code = system_exec_command_line_app("ld-link", true,
 		"ld \"%.*s\".o -o \"%.*s%s\" %s "
 		"-lc "
@@ -411,8 +415,11 @@ int main(int argc, char **argv) {
 		#if defined(GB_SYSTEM_OSX)
 			// This sets a requirement of Mountain Lion and up, but the compiler doesn't work without this limit.
 			" -macosx_version_min 10.8.0 "
+			" -e _main "
+		#else
+			" -e main -dynamic-linker /lib64/ld-linux-x86-64.so.2 "
 		#endif
-		" -e _main ",
+		,
 		LIT(output), LIT(output), output_ext,
 		lib_str, LIT(build_context.link_flags),
 		link_settings