diff -aur src.orig/torcs-1.3.7/src/drivers/olethros/geometry.cpp src/torcs-1.3.7/src/drivers/olethros/geometry.cpp
--- src.orig/torcs-1.3.7/src/drivers/olethros/geometry.cpp	2021-06-29 20:35:16.127232867 +0200
+++ src/torcs-1.3.7/src/drivers/olethros/geometry.cpp	2021-06-29 20:36:07.637478329 +0200
@@ -370,7 +370,7 @@
 				}
 				delta_total += delta;
 			}
-			if (isnan(r)) {
+			if (std::isnan(r)) {
 				for (i=0; i<d; i++) {
 					center[i] =  ((*(sphere->C))[i] - mean[i]) / scale;
 				}
diff -aur src.orig/torcs-1.3.7/src/libs/musicplayer/OpenALMusicPlayer.cpp src/torcs-1.3.7/src/libs/musicplayer/OpenALMusicPlayer.cpp
--- src.orig/torcs-1.3.7/src/libs/musicplayer/OpenALMusicPlayer.cpp	2021-06-29 20:35:16.133899565 +0200
+++ src/torcs-1.3.7/src/libs/musicplayer/OpenALMusicPlayer.cpp	2021-06-29 20:36:07.760812253 +0200
@@ -161,7 +161,7 @@
 {
 	char pcm[BUFFERSIZE];
 	int size = 0;
-	const char* error = '\0';
+	const char* error = nullptr;
 	
 	if (!stream->read(pcm, BUFFERSIZE, &size, &error)) {
 		GfError("OpenALMusicPlayer: Stream read error: %s\n", error);
@@ -268,4 +268,4 @@
     alSourcePlay(source);
     
     return true;
-}
\ No newline at end of file
+}
diff -aur src.orig/torcs-1.3.7/src/tools/trackgen/objects.cpp src/torcs-1.3.7/src/tools/trackgen/objects.cpp
--- src.orig/torcs-1.3.7/src/tools/trackgen/objects.cpp	2021-06-29 20:35:16.103899423 +0200
+++ src/torcs-1.3.7/src/tools/trackgen/objects.cpp	2021-06-29 20:36:07.510811054 +0200
@@ -304,7 +304,7 @@
 	fprintf (save_fd, "numsurf %d\n", num_tris);
 
 	for (i = 0; i < num_tris; i++) {
-		fprintf (save_fd, surf);
+		fprintf (save_fd, "%s", surf);
 		fprintf (save_fd, "mat 0\n");
 		fprintf (save_fd, "refs 3\n");
 		fprintf (save_fd, "%d %g %g\n",