diff --git a/arduino/CMakeLists.txt b/arduino/CMakeLists.txt
index eec92c6..a2bb900 100644
--- a/arduino/CMakeLists.txt
+++ b/arduino/CMakeLists.txt
@@ -43,17 +43,18 @@ file(GLOB_RECURSE ARDUINO_SRC
     ${ARDUINO_ESP8266_DIR}/cores/esp8266/*.cpp
 )
 
-file(GLOB ARDUINO_ASM_SRC
+file(GLOB ARDUINO_SRC_ASM
     ${ARDUINO_ESP8266_DIR}/cores/esp8266/*.S
 )
 
-set_source_files_properties(${ARDUINO_ASM_SRC} PROPERTIES
+set_source_files_properties(${ARDUINO_SRC_ASM} PROPERTIES
     LANGUAGE ASM
+    COMPILE_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_DEBUG}"
 )
 
 add_library(arduino STATIC
     ${ARDUINO_SRC}
-    ${ARDUINO_ASM_SRC}
+    ${ARDUINO_SRC_ASM}
 )
 
 target_include_directories(arduino PUBLIC
diff --git a/arduino/libraries/GDBStub/CMakeLists.txt b/arduino/libraries/GDBStub/CMakeLists.txt
index 61d937f..3749fc7 100644
--- a/arduino/libraries/GDBStub/CMakeLists.txt
+++ b/arduino/libraries/GDBStub/CMakeLists.txt
@@ -3,8 +3,18 @@ file(GLOB GDBSTUB_LIB_SRC
     ${ARDUINO_ESP8266_DIR}/libraries/GDBStub/src/internal/*.S
 )
 
+file(GLOB GDBSTUB_LIB_SRC_ASM
+    ${ARDUINO_ESP8266_DIR}/libraries/GDBStub/src/internal/*.S
+)
+
+set_source_files_properties(${GDBSTUB_LIB_SRC_ASM} PROPERTIES
+    LANGUAGE ASM
+    COMPILE_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_DEBUG}"
+)
+
 add_library(esp8266gdbstub STATIC
     ${GDBSTUB_LIB_SRC}
+    ${GDBSTUB_LIB_SRC_ASM}
 )
 
 target_include_directories(esp8266gdbstub PUBLIC
@@ -14,3 +24,11 @@ target_include_directories(esp8266gdbstub PUBLIC
     ${ARDUINO_ESP8266_DIR}/libraries/GDBStub/src/xtensa/config
 )
 
+target_compile_definitions(esp8266gdbstub PUBLIC
+    -DGDBSTUB_REDIRECT_CONSOLE_OUTPUT
+    -DGDBSTUB_CTRLC_BREAK
+    -DGDBSTUB_BREAK_ON_INIT
+)
+
+target_link_libraries(esp8266gdbstub
+    arduino
diff --git a/cmake/toolchain.ESP8266.cmake b/cmake/toolchain.ESP8266.cmake
index d4e7ea9..abca7fe 100644
--- a/cmake/toolchain.ESP8266.cmake
+++ b/cmake/toolchain.ESP8266.cmake
@@ -5,7 +5,8 @@ set(CMAKE_SYSTEM_VERSION 1)
 
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/Modules")
 
-set (ESP8266_FLASH_SIZE "512K" CACHE STRING "Size of flash")
+set (ESP8266_FLASH_SIZE "512k0" CACHE STRING "Size of flash")
+set (ESP8266_LINKER_SCRIPT "eagle.flash.512k0.ld" CACHE STRING "Name of linker script")
 
 if(CMAKE_HOST_SYSTEM_NAME MATCHES "Linux")
     set(USER_HOME $ENV{HOME})
@@ -45,7 +46,7 @@ CMAKE_FORCE_CXX_COMPILER(${ESP8266_XTENSA_CXX_COMPILER} GNU_CXX)
 
 set(CMAKE_C_FLAGS "-Os -g -std=gnu99 -Wpointer-arith -Wno-implicit-function-declaration -Wundef -pipe -D__ets__ -DICACHE_FLASH -fno-inline-functions -ffunction-sections -nostdlib -mlongcalls -mtext-section-literals -falign-functions=4 -fdata-sections" CACHE STRING "C compiler flags")
 set(CMAKE_CXX_FLAGS "-Os -g -D__ets__ -DICACHE_FLASH -mlongcalls -mtext-section-literals -fno-exceptions -fno-rtti -falign-functions=4 -std=c++11 -MMD -ffunction-sections -fdata-sections" CACHE STRING "CXX compiler flags")
-set(CMAKE_EXE_LINKER_FLAGS "-nostdlib -Wl,--no-check-sections -Wl,-static -Wl,--gc-sections -Wl,--no-relax -L${ARDUINO_ESP8266_DIR}/tools/sdk/ld -Teagle.flash.512k0.ld -u call_user_start -Wl,-wrap,system_restart_local -Wl,-wrap,register_chipv6_phy" CACHE STRING "linker flags")
+set(CMAKE_EXE_LINKER_FLAGS "-nostdlib -Wl,--no-check-sections -Wl,-static -Wl,--gc-sections -Wl,--no-relax -L${ARDUINO_ESP8266_DIR}/tools/sdk/ld -Teagle.flash.${ESP8266_FLASH_SIZE}.ld -u call_user_start -Wl,-wrap,system_restart_local -Wl,-wrap,register_chipv6_phy" CACHE STRING "linker flags")
 
 set(CMAKE_C_LINK_EXECUTABLE "<CMAKE_C_COMPILER> <FLAGS> <CMAKE_C_LINK_FLAGS> <LINK_FLAGS> -o <TARGET> -Wl,--start-group <OBJECTS> <LINK_LIBRARIES> -Wl,--end-group" CACHE STRING "C linker invocation")
 set(CMAKE_CXX_LINK_EXECUTABLE "<CMAKE_CXX_COMPILER> <FLAGS> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> -o <TARGET> -Wl,--start-group <OBJECTS> <LINK_LIBRARIES> -Wl,--end-group" CACHE STRING "CXX linker invocation")