diff --git a/CMakeLists.txt b/CMakeLists.txt
index ddea68e50..11e1e92b7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -996,7 +996,6 @@ if(SDL_LIBC)
       set(HAVE_${_UPPER} 1)
     endforeach()
     set(HAVE_ALLOCA 1)
-    check_symbol_exists(M_PI math.h HAVE_M_PI)
     set(STDC_HEADERS 1)
   else()
     set(HAVE_LIBC TRUE)
@@ -1032,7 +1031,6 @@ if(SDL_LIBC)
 
     set(STDC_HEADER_NAMES "stddef.h;stdarg.h;stdlib.h;string.h;stdio.h;wchar.h;float.h")
     check_include_files("${STDC_HEADER_NAMES}" STDC_HEADERS)
-    check_symbol_exists(M_PI math.h HAVE_M_PI)
     # TODO: refine the mprotect check
     check_c_source_compiles("#include <sys/types.h>
                              #include <sys/mman.h>
diff --git a/include/SDL_config.h.cmake b/include/SDL_config.h.cmake
index cebc9007b..eeb72dda8 100644
--- a/include/SDL_config.h.cmake
+++ b/include/SDL_config.h.cmake
@@ -144,7 +144,6 @@
 #cmakedefine HAVE_SSCANF 1
 #cmakedefine HAVE_VSSCANF 1
 #cmakedefine HAVE_VSNPRINTF 1
-#cmakedefine HAVE_M_PI 1
 #cmakedefine HAVE_ACOS 1
 #cmakedefine HAVE_ACOSF 1
 #cmakedefine HAVE_ASIN 1
diff --git a/include/SDL_config_emscripten.h b/include/SDL_config_emscripten.h
index 989e1243a..2198d3010 100644
--- a/include/SDL_config_emscripten.h
+++ b/include/SDL_config_emscripten.h
@@ -104,7 +104,6 @@
 #define HAVE_SSCANF 1
 #define HAVE_VSSCANF 1
 #define HAVE_VSNPRINTF 1
-#define HAVE_M_PI 1
 #define HAVE_ACOS 1
 #define HAVE_ACOSF 1
 #define HAVE_ASIN 1
diff --git a/include/SDL_config_iphoneos.h b/include/SDL_config_iphoneos.h
index 6db16eb4c..0e4c14814 100644
--- a/include/SDL_config_iphoneos.h
+++ b/include/SDL_config_iphoneos.h
@@ -88,7 +88,6 @@
 #define HAVE_STRCASESTR 1
 #define HAVE_VSSCANF 1
 #define HAVE_VSNPRINTF  1
-#define HAVE_M_PI   1
 #define HAVE_ACOS   1
 #define HAVE_ACOSF  1
 #define HAVE_ASIN   1
diff --git a/include/SDL_config_macosx.h b/include/SDL_config_macosx.h
index e7189f3a1..e7cc31003 100644
--- a/include/SDL_config_macosx.h
+++ b/include/SDL_config_macosx.h
@@ -91,7 +91,6 @@
 #define HAVE_STRCASESTR 1
 #define HAVE_VSSCANF 1
 #define HAVE_VSNPRINTF  1
-#define HAVE_M_PI   1
 #define HAVE_ACOS   1
 #define HAVE_ACOSF  1
 #define HAVE_ASIN   1
diff --git a/include/SDL_config_windows.h b/include/SDL_config_windows.h
index 2ea2f9d25..87ca5ecb8 100644
--- a/include/SDL_config_windows.h
+++ b/include/SDL_config_windows.h
@@ -217,12 +217,6 @@ typedef unsigned int uintptr_t;
 #if _MSC_VER >= 1400
 #define HAVE__FSEEKI64 1
 #endif
-#ifdef _USE_MATH_DEFINES
-#define HAVE_M_PI 1
-#endif
-#else
-#define HAVE_M_PI 1
-#endif
 #else
 #define HAVE_STDARG_H   1
 #define HAVE_STDDEF_H   1
diff --git a/include/SDL_config_wingdk.h b/include/SDL_config_wingdk.h
index 6f793d2aa..28a890bd2 100644
--- a/include/SDL_config_wingdk.h
+++ b/include/SDL_config_wingdk.h
@@ -155,11 +155,6 @@
 #define HAVE_TRUNC  1
 #define HAVE_TRUNCF 1
 #define HAVE__FSEEKI64 1
-#ifdef _USE_MATH_DEFINES
-#define HAVE_M_PI 1
-#endif
-#else
-#define HAVE_M_PI 1
 #endif
 #else
 #define HAVE_STDARG_H   1
diff --git a/include/SDL_config_winrt.h b/include/SDL_config_winrt.h
index da894c883..92b6ca0fc 100644
--- a/include/SDL_config_winrt.h
+++ b/include/SDL_config_winrt.h
@@ -110,7 +110,6 @@
 /* #undef HAVE__LTOA */
 /* #undef HAVE__ULTOA */
 /* #undef HAVE_SSCANF */
-#define HAVE_M_PI 1
 #define HAVE_ACOS   1
 #define HAVE_ACOSF  1
 #define HAVE_ASIN   1
diff --git a/include/SDL_config_xbox.h b/include/SDL_config_xbox.h
index 54fa1a42b..49bea3344 100644
--- a/include/SDL_config_xbox.h
+++ b/include/SDL_config_xbox.h
@@ -155,11 +155,6 @@
 #define HAVE_TRUNC  1
 #define HAVE_TRUNCF 1
 #define HAVE__FSEEKI64 1
-#ifdef _USE_MATH_DEFINES
-#define HAVE_M_PI 1
-#endif
-#else
-#define HAVE_M_PI 1
 #endif
 #else
 #define HAVE_STDARG_H   1