Update ios.toolchain.cmake

Added CMAKE_CXX_FLAGS_DEBUG with debug settings

Author: leetal

ios.toolchain.cmake

@@ -105,6 +105,9 @@ set(CMAKE_HAVE_THREADS_LIBRARY 1)
 set(CMAKE_USE_WIN32_THREADS_INIT 0)
 set(CMAKE_USE_PTHREADS_INIT 1)
 
+# Cache what generator is used
+set(USED_CMAKE_GENERATOR "${CMAKE_GENERATOR}" CACHE STRING "Expose CMAKE_GENERATOR" FORCE)
+
 # Get the Xcode version being used.
 execute_process(COMMAND xcodebuild -version
   OUTPUT_VARIABLE XCODE_VERSION
@@ -409,6 +412,7 @@ set(CMAKE_C_FLAGS
 # Hidden visibilty is required for C++ on iOS.
 set(CMAKE_CXX_FLAGS
 "${XCODE_IOS_PLATFORM_VERSION_FLAGS} ${BITCODE} ${VISIBILITY} -fvisibility-inlines-hidden -fobjc-abi-version=2 ${FOBJC_ARC} ${CMAKE_CXX_FLAGS}")
+set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS} -O0 -g ${BITCODE} ${CMAKE_CXX_FLAGS_DEBUG}")
 set(CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS} -DNDEBUG -Os -ffast-math ${BITCODE} ${CMAKE_CXX_FLAGS_MINSIZEREL}")
 set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS} -DNDEBUG -O2 -g -ffast-math ${BITCODE} ${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
 set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS} -DNDEBUG -O3 -ffast-math ${BITCODE} ${CMAKE_CXX_FLAGS_RELEASE}")
@@ -421,6 +425,7 @@ set(CMAKE_CXX_LINK_FLAGS "${XCODE_IOS_PLATFORM_VERSION_FLAGS}  -Wl,-search_paths
 list(APPEND VARS_TO_FORCE_IN_CACHE
   CMAKE_C_FLAGS
   CMAKE_CXX_FLAGS
+  CMAKE_CXX_FLAGS_DEBUG
   CMAKE_CXX_FLAGS_RELWITHDEBINFO
   CMAKE_CXX_FLAGS_MINSIZEREL
   CMAKE_CXX_FLAGS_RELEASE