Firebase cpp: Exported symbol with compiler used and std library used to provide compile link error instead of runtime crash if differnet setup is used.

PiperOrigin-RevId: 278485256

Author: markchandler

app/src/app_android.cc

@@ -420,7 +420,7 @@ AppOptions* AppOptions::LoadDefault(AppOptions* app_options,
   return app_options;
 }
 
-App::App() : activity_(nullptr), internal_(nullptr) {}
+void App::Initialize() {}
 
 App::~App() {
   app_common::RemoveApp(this);

app/src/app_common.cc

@@ -46,6 +46,17 @@
 
 namespace FIREBASE_NAMESPACE {
 
+#ifdef FIREBASE_LINUX_BUILD_CONFIG_STRING
+void CheckCompilerString(const char* input) {
+  FIREBASE_ASSERT_MESSAGE(
+      strcmp(FIREBASE_LINUX_BUILD_CONFIG_STRING, input) == 0,
+      "The compiler or stdlib library Firebase was compiled with does not "
+      "match what is being used to compile this application."
+      " [Lib: '%s' != Bin: '%s']",
+      FIREBASE_LINUX_BUILD_CONFIG_STRING, input);
+}
+#endif  // FIREBASE_LINUX_BUILD_CONFIG_STRING
+
 // Default app name.
 const char* const kDefaultAppName = "__FIRAPP_DEFAULT";
 

app/src/app_desktop.cc

@@ -117,7 +117,7 @@ AppOptions* AppOptions::LoadDefault(AppOptions* options) {
   return nullptr;
 }
 
-App::App() {
+void App::Initialize() {
   internal_ = new internal::AppInternal();
 }
 

app/src/app_ios.mm

@@ -220,7 +220,7 @@ static void PlatformOptionsToAppOptions(FIROptions* platform_options,
   return app_options;
 }
 
-App::App() : internal_(nullptr) {}
+void App::Initialize() {}
 
 App::~App() {
   app_common::RemoveApp(this);

app/src/app_stub.cc

@@ -31,7 +31,8 @@ DEFINE_FIREBASE_VERSION_STRING(Firebase);
 
 const char* const kDefaultAppName = "default";
 
-App::App() : data_(new internal::FunctionRegistry) {
+void App::Initialize() {
+  data_ = new internal::FunctionRegistry;
   LogDebug("Creating firebase::App for %s", kFirebaseVersionString);
 }
 

app/src/include/firebase/app.h

@@ -39,6 +39,11 @@
 
 namespace FIREBASE_NAMESPACE {
 
+#ifdef FIREBASE_LINUX_BUILD_CONFIG_STRING
+// Check to see if the shared object compiler string matches the input
+void CheckCompilerString(const char* input);
+#endif  // FIREBASE_LINUX_BUILD_CONFIG_STRING
+
 // Predeclarations.
 #ifdef INTERNAL_EXPERIMENTAL
 namespace internal {
@@ -754,7 +759,21 @@ class App {
 
  private:
   /// Construct the object.
-  App();
+  App() :
+#if FIREBASE_PLATFORM_ANDROID || defined(DOXYGEN)
+    activity_(nullptr),
+#endif
+    internal_(nullptr) {
+    Initialize();
+
+#ifdef FIREBASE_LINUX_BUILD_CONFIG_STRING
+  CheckCompilerString(FIREBASE_LINUX_BUILD_CONFIG_STRING);
+#endif  // FIREBASE_LINUX_BUILD_CONFIG_STRING
+  }
+
+
+  /// Initialize internal implementation
+  void Initialize();
 
 #ifndef SWIG
 // <SWIG>

app/src/include/firebase/internal/platform.h

@@ -65,6 +65,37 @@
 #define FIREBASE_PLATFORM_UNKNOWN 1
 #endif
 
+#if FIREBASE_PLATFORM_LINUX
+
+// Include std library header to get version defines
+#include <stdexcept>
+
+#if defined(__clang__)
+#define FIREBASE_COMPILER_CLANG 1
+#elif defined(__GNUC__)
+#define FIREBASE_COMPILER_GCC 1
+#endif
+
+#if defined(_LIBCPP_VERSION)
+#define FIREBASE_STANDARD_LIBCPP 1
+#elif defined(__GLIBCXX__)
+#define FIREBASE_STANDARD_LIBSTDCPP 1
+#endif
+
+#if (FIREBASE_COMPILER_CLANG && FIREBASE_STANDARD_LIBCPP)
+#define FIREBASE_LINUX_BUILD_CONFIG_STRING "clang_libstdcpp"
+#elif (FIREBASE_COMPILER_CLANG && FIREBASE_STANDARD_LIBSTDCPP)
+#define FIREBASE_LINUX_BUILD_CONFIG_STRING "clang_libcpp"
+#elif (FIREBASE_COMPILER_GCC && FIREBASE_STANDARD_LIBCPP)
+#define FIREBASE_LINUX_BUILD_CONFIG_STRING "gcc_libstdcpp"
+#elif (FIREBASE_COMPILER_GCC && FIREBASE_STANDARD_LIBSTDCPP)
+#define FIREBASE_LINUX_BUILD_CONFIG_STRING "gcc_libcpp"
+#else
+#error "Unsupported compiler or standard library"
+#endif
+
+#endif  // FIREBASE_PLATFORM_LINUX
+
 #define FIREBASE_PLATFORM_MOBILE \
   (FIREBASE_PLATFORM_IOS || FIREBASE_PLATFORM_ANDROID)
 #define FIREBASE_PLATFORM_DESKTOP                          \