diff --git a/include/build_config/SDL_build_config_android.h b/include/build_config/SDL_build_config_android.h
index db5e3cebd7..34f26270e9 100644
--- a/include/build_config/SDL_build_config_android.h
+++ b/include/build_config/SDL_build_config_android.h
@@ -57,8 +57,10 @@
 #define HAVE_MALLOC 1
 #define HAVE_CALLOC 1
 #define HAVE_REALLOC    1
+#define HAVE_FDATASYNC 1
 #define HAVE_FREE   1
 #define HAVE_GETENV 1
+#define HAVE_GETHOSTNAME 1
 #define HAVE_PUTENV 1
 #define HAVE_SETENV 1
 #define HAVE_UNSETENV   1
diff --git a/include/build_config/SDL_build_config_emscripten.h b/include/build_config/SDL_build_config_emscripten.h
index 32596b301f..9b3f853d14 100644
--- a/include/build_config/SDL_build_config_emscripten.h
+++ b/include/build_config/SDL_build_config_emscripten.h
@@ -60,8 +60,10 @@
 #define HAVE_MALLOC 1
 #define HAVE_CALLOC 1
 #define HAVE_REALLOC 1
+#define HAVE_FDATASYNC 1
 #define HAVE_FREE 1
 #define HAVE_GETENV 1
+#define HAVE_GETHOSTNAME 1
 #define HAVE_SETENV 1
 #define HAVE_PUTENV 1
 #define HAVE_UNSETENV 1
diff --git a/include/build_config/SDL_build_config_ios.h b/include/build_config/SDL_build_config_ios.h
index 4dc3b674d4..c606f2ef6f 100644
--- a/include/build_config/SDL_build_config_ios.h
+++ b/include/build_config/SDL_build_config_ios.h
@@ -51,6 +51,7 @@
 #define HAVE_REALLOC    1
 #define HAVE_FREE   1
 #define HAVE_GETENV 1
+#define HAVE_GETHOSTNAME 1
 #define HAVE_PUTENV 1
 #define HAVE_SETENV 1
 #define HAVE_UNSETENV   1
diff --git a/include/build_config/SDL_build_config_macos.h b/include/build_config/SDL_build_config_macos.h
index cd041b9e9e..08bbd81d8c 100644
--- a/include/build_config/SDL_build_config_macos.h
+++ b/include/build_config/SDL_build_config_macos.h
@@ -56,6 +56,7 @@
 #define HAVE_REALLOC    1
 #define HAVE_FREE   1
 #define HAVE_GETENV 1
+#define HAVE_GETHOSTNAME 1
 #define HAVE_SETENV 1
 #define HAVE_PUTENV 1
 #define HAVE_UNSETENV   1