Allow building libcppbor with -fno-rtti am: ad16ab5473

Original change: https://android-review.googlesource.com/c/platform/external/libcppbor/+/1494476

Change-Id: I6b664e9fa49b98cc3c891d7058e0c299028c2d70

2 files changed, 7 insertions, 3 deletions

diff --git a/rules.mk b/rules.mk
index 739fe23..5bcea52 100644
--- a/rules.mk
+++ b/rules.mk
@@ -18,7 +18,7 @@ LOCAL_DIR := $(GET_LOCAL_DIR)
 
 MODULE := $(LOCAL_DIR)
 
-MODULE_CPPFLAGS := -std=c++17 -frtti
+MODULE_CPPFLAGS := -std=c++17
 
 MODULE_SRCS := \
 	$(LOCAL_DIR)/src/cppbor.cpp \
diff --git a/src/cppbor_parse.cpp b/src/cppbor_parse.cpp
index 5cffe15..33d2ab6 100644
--- a/src/cppbor_parse.cpp
+++ b/src/cppbor_parse.cpp
@@ -280,7 +280,9 @@ class FullParseClient : public ParseClient {
             // Starting a new compound data item, i.e. a new parent.  Save it on the parent stack.
             // It's safe to save a raw pointer because the unique_ptr is guaranteed to stay in
             // existence until the corresponding itemEnd() call.
-            assert(dynamic_cast<CompoundItem*>(item.get()));
+            #if __has_feature(cxx_rtti)
+                assert(dynamic_cast<CompoundItem*>(item.get()));
+            #endif
             mParentStack.push(static_cast<CompoundItem*>(item.get()));
             return this;
         } else {
@@ -319,7 +321,9 @@ class FullParseClient : public ParseClient {
   private:
     void appendToLastParent(std::unique_ptr<Item> item) {
         auto parent = mParentStack.top();
-        assert(dynamic_cast<IncompleteItem*>(parent));
+        #if __has_feature(cxx_rtti)
+            assert(dynamic_cast<IncompleteItem*>(parent));
+        #endif
         if (parent->type() == ARRAY) {
             static_cast<IncompleteArray*>(parent)->add(std::move(item));
         } else if (parent->type() == MAP) {