add RTTI again to avoid uncaught exceptions

CMakeLists.txt

@@ -124,7 +124,7 @@ if (CMAKE_COMPILER_IS_GNUCXX)
 	message("Compiler      : GNU Compiler (gcc)")
 	set(GCC "TRUE")
 #	set(COMBINED_FLAGS "-Wall -Wno-unused-function -Wno-sign-compare -pedantic -D_GNU_SOURCE -fms-extensions -Wno-deprecated")
-	set(CMAKE_CXX_FLAGS_RELEASE "-O3 -g -ffunction-sections -fdata-sections -fno-rtti")
+	set(CMAKE_CXX_FLAGS_RELEASE "-O3 -g -ffunction-sections -fdata-sections")
 	set(CMAKE_C_FLAGS_RELEASE "-O3 -g -ffunction-sections -fdata-sections")
     set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} -Wl,--gc-sections")
     # require at least gcc 4.8
@@ -140,7 +140,7 @@ elseif (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
 	message("Compiler      : Clang")
 	set(CLANG "TRUE")
 #	set(COMBINED_FLAGS "-Wall -Wno-unused-function -Wno-sign-compare -pedantic -D_GNU_SOURCE -Wno-nested-anon-types")
-    set(CMAKE_CXX_FLAGS_RELEASE "-O3 -fno-rtti -ffunction-sections -fdata-sections")
+    set(CMAKE_CXX_FLAGS_RELEASE "-O3 -ffunction-sections -fdata-sections")
     set(CMAKE_C_FLAGS_RELEASE "-O3 -ffunction-sections -fdata-sections")
     if (APPLE)
         set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} -Wl,-dead_strip")
@@ -187,7 +187,11 @@ endif()
 
 # enable link time optimization
 if (IQTREE_FLAGS MATCHES "lto")
-    set(COMBINED_FLAGS "${COMBINED_FLAGS} -flto")
+    #if (CLANG)
+    #    set(COMBINED_FLAGS "${COMBINED_FLAGS} -flto=thin")
+    #else()
+        set(COMBINED_FLAGS "${COMBINED_FLAGS} -flto")
+    #endif()
 endif()
 
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