Add weak __libcpp_verbose_abort definition to app on iOS

app/src/app_ios.mm

@@ -30,6 +30,40 @@
 #include "app/src/util.h"
 #include "app/src/util_ios.h"
 
+#include <cstdarg>
+#include <cstdio>
+#include <cstdlib>
+
+// Workaround for Xcode 15+ / Swift 5.10+ Concurrency and C++ verbose abort
+// crash on older iOS versions (iOS 15/16).
+// By providing this symbol in our own binary, we prevent dyld from
+// crashing when it is missing from the system libc++ on older OSs.
+#if defined(_LIBCPP_VERBOSE_ABORT_NOEXCEPT)
+#define FIREBASE_LIBCPP_VERBOSE_ABORT_NOEXCEPT _LIBCPP_VERBOSE_ABORT_NOEXCEPT
+#elif defined(__apple_build_version__) && __apple_build_version__ >= 16000000 && \
+    __apple_build_version__ < 20000000
+#define FIREBASE_LIBCPP_VERBOSE_ABORT_NOEXCEPT
+#else
+#define FIREBASE_LIBCPP_VERBOSE_ABORT_NOEXCEPT noexcept
+#endif
+
+#ifndef _LIBCPP_ABI_NAMESPACE
+#define _LIBCPP_ABI_NAMESPACE __1
+#endif
+
+namespace std {
+inline namespace _LIBCPP_ABI_NAMESPACE {
+__attribute__((weak)) void __libcpp_verbose_abort(const char* format,
+                                                  ...) FIREBASE_LIBCPP_VERBOSE_ABORT_NOEXCEPT {
+  std::va_list list;
+  va_start(list, format);
+  std::vfprintf(stderr, format, list);
+  va_end(list);
+  std::abort();
+}
+}  // namespace _LIBCPP_ABI_NAMESPACE
+}  // namespace std
+
 #include "FIROptions.h"
 
 @interface FIRApp ()

release_build_files/readme.md

@@ -613,6 +613,10 @@ workflow use only during the development of your app, not for publicly shipping
 code.
 
 ## Release Notes
+### Upcoming
+- Changes
+    - General (iOS): Fixed a startup crash on iOS 15 and 16 due to a missing `__libcpp_verbose_abort` symbol.
+
 ### 13.9.0
 - Changes
     - General (Android): Update to Firebase Android BoM version 34.15.0.

testing/sample_framework/src/app_framework.cc

@@ -26,38 +26,6 @@
 #include <cstring>
 #include <ctime>
 
-#if defined(__APPLE__)
-#include <TargetConditionals.h>
-// Workaround for Xcode 15 / Swift 5.10 Concurrency and C++ verbose abort
-// crash on older iOS versions (iOS 15/16).
-// By providing these symbols in our own binary, we prevent dyld from
-// crashing when they are missing from the system libraries on older OSs.
-
-// In Xcode 16, libc++ removed the noexcept specifier from
-// __libcpp_verbose_abort.
-#if defined(_LIBCPP_VERBOSE_ABORT_NOEXCEPT)
-#define FIREBASE_LIBCPP_VERBOSE_ABORT_NOEXCEPT _LIBCPP_VERBOSE_ABORT_NOEXCEPT
-#elif defined(__apple_build_version__) && \
-    __apple_build_version__ >= 16000000 && __apple_build_version__ < 20000000
-#define FIREBASE_LIBCPP_VERBOSE_ABORT_NOEXCEPT
-#else
-#define FIREBASE_LIBCPP_VERBOSE_ABORT_NOEXCEPT noexcept
-#endif
-
-namespace std {
-inline namespace __1 {
-__attribute__((weak)) void __libcpp_verbose_abort(const char* format, ...)
-    FIREBASE_LIBCPP_VERBOSE_ABORT_NOEXCEPT {
-  va_list list;
-  va_start(list, format);
-  vfprintf(stderr, format, list);
-  va_end(list);
-  abort();
-}
-}  // namespace __1
-}  // namespace std
-#endif
-
 namespace app_framework {
 
 // Base logging methods, implemented by platform-specific files.