Fix -Wdeprecated-declarations warnings

An alternative could be to define _CRT_SECURE_NO_WARNINGS

CMakeLists.txt

@@ -1139,8 +1139,8 @@ if(SDL_LIBC)
     _Exit exp expf
     fabs fabsf floor floorf fmod fmodf fopen64 fseeko fseeko64
     getenv
-    _i64toa index itoa
-    log log10 log10f logf lround lroundf _ltoa
+    _i64toa _i64toa_s index itoa _itoa_s
+    log log10 log10f logf lround lroundf _ltoa _ltoa_s
     malloc memcmp memcpy memmove memset modf modff
     pow powf putenv
     rindex round roundf
@@ -1154,7 +1154,7 @@ if(SDL_LIBC)
   )
   if(WINDOWS OR CYGWIN)
     list(APPEND symbols_to_check
-      _copysign _fseeki64 _strrev _ui64toa _uitoa _ultoa _wcsdup
+      _copysign _fseeki64 _strrev _ui64toa _ui64toa_s _uitoa _ultoa _ultoa_s _wcsdup
     )
   else()
     list(APPEND symbols_to_check

include/build_config/SDL_build_config.h.cmake

@@ -106,13 +106,18 @@
 #cmakedefine HAVE_STRNSTR 1
 #cmakedefine HAVE_STRTOK_R 1
 #cmakedefine HAVE_ITOA 1
+#cmakedefine HAVE__ITOA_S 1
 #cmakedefine HAVE__LTOA 1
+#cmakedefine HAVE__LTOA_S 1
 #cmakedefine HAVE__UITOA 1
 #cmakedefine HAVE__ULTOA 1
+#cmakedefine HAVE__ULTOA_S 1
 #cmakedefine HAVE_STRTOL 1
 #cmakedefine HAVE_STRTOUL 1
 #cmakedefine HAVE__I64TOA 1
+#cmakedefine HAVE__I64TOA_S 1
 #cmakedefine HAVE__UI64TOA 1
+#cmakedefine HAVE__UI64TOA_S 1
 #cmakedefine HAVE_STRTOLL 1
 #cmakedefine HAVE_STRTOULL 1
 #cmakedefine HAVE_STRTOD 1

src/stdlib/SDL_string.c

@@ -1155,7 +1155,10 @@ static const char ntoa_table[] = {
 
 char *SDL_itoa(int value, char *string, int radix)
 {
-#ifdef HAVE_ITOA
+#ifdef HAVE__ITOA_S
+    (void)_ltoa_s(value, string, 12, radix);
+    return string;
+#elif defined(HAVE_ITOA)
     return itoa(value, string, radix);
 #else
     return SDL_ltoa((long)value, string, radix);
@@ -1173,7 +1176,10 @@ char *SDL_uitoa(unsigned int value, char *string, int radix)
 
 char *SDL_ltoa(long value, char *string, int radix)
 {
-#ifdef HAVE__LTOA
+#ifdef HAVE__LTOA_S
+    (void)_ltoa_s(value, string, 64, radix);
+    return string;
+#elif defined(HAVE__LTOA)
     return _ltoa(value, string, radix);
 #else
     char *bufp = string;
@@ -1191,7 +1197,10 @@ char *SDL_ltoa(long value, char *string, int radix)
 
 char *SDL_ultoa(unsigned long value, char *string, int radix)
 {
-#ifdef HAVE__ULTOA
+#ifdef HAVE__ULTOA_S
+    (void)_ultoa_s(value, string, 64, radix);
+    return string;
+#elif defined(HAVE__ULTOA)
     return _ultoa(value, string, radix);
 #else
     char *bufp = string;
@@ -1215,7 +1224,10 @@ char *SDL_ultoa(unsigned long value, char *string, int radix)
 
 char *SDL_lltoa(long long value, char *string, int radix)
 {
-#ifdef HAVE__I64TOA
+#ifdef HAVE__I64TOA_S
+    (void)_i64toa_s(value, string, 64, radix);
+    return string;
+#elif defined(HAVE__I64TOA)
     return _i64toa(value, string, radix);
 #else
     char *bufp = string;
@@ -1233,7 +1245,10 @@ char *SDL_lltoa(long long value, char *string, int radix)
 
 char *SDL_ulltoa(unsigned long long value, char *string, int radix)
 {
-#ifdef HAVE__UI64TOA
+#ifdef HAVE__UI64TOA_S
+    (void)_ui64toa_s(value, string, 64, radix);
+    return string;
+#elif defined(HAVE__UI64TOA)
     return _ui64toa(value, string, radix);
 #else
     char *bufp = string;