malloc.h is linux specific and should NOT be used. Also one file was missing the corresponding include

source/3ds/lz11.cpp

@@ -2,6 +2,7 @@
 
 #include <stdio.h>
 #include <string.h>
+#include <stdlib.h>
 
 #include <sstream>
 
@@ -123,4 +124,4 @@ u8* lz11_compress(u8* input, u32 inputSize, u32* size) {
 
     *size = (u32) compressedLength;
     return buf;
-}
+}

source/pc/stb_vorbis.c

@@ -551,7 +551,7 @@ enum STBVorbisError
 #include <assert.h>
 #include <math.h>
 #if !(defined(__APPLE__) || defined(MACOSX) || defined(macintosh) || defined(Macintosh))
-#include <malloc.h>
+#include <stdlib.h>
 #endif
 #else // STB_VORBIS_NO_CRT
 #define NULL 0