'USER_BUTTON_EXTI_LINE' undeclared here (not in a function) stm32f072b_discovery.c  /STM32F072B-Discovery/Drivers/BSP/STM32F072B-Discovery  line 96 C/C++ Problem
'USER_BUTTON_GPIO_CLK' undeclared here (not in a function)  stm32f072b_discovery.c  /STM32F072B-Discovery/Drivers/BSP/STM32F072B-Discovery  line 94 C/C++ Problem
'USER_BUTTON_EXTI_PIN_SOURCE' undeclared here (not in a function)   stm32f072b_discovery.c  /STM32F072B-Discovery/Drivers/BSP/STM32F072B-Discovery  line 100    C/C++ Problem
'USER_BUTTON_EXTI_PORT_SOURCE' undeclared here (not in a function)  stm32f072b_discovery.c  /STM32F072B-Discovery/Drivers/BSP/STM32F072B-Discovery  line 98 C/C++ Problem
'LED4_GPIO_CLK' undeclared here (not in a function) stm32f072b_discovery.c  /STM32F072B-Discovery/Drivers/BSP/STM32F072B-Discovery  line 87 C/C++ Problem
'LED3_GPIO_CLK' undeclared here (not in a function) stm32f072b_discovery.c  /STM32F072B-Discovery/Drivers/BSP/STM32F072B-Discovery  line 87 C/C++ Problem
'LED6_GPIO_CLK' undeclared here (not in a function) stm32f072b_discovery.c  /STM32F072B-Discovery/Drivers/BSP/STM32F072B-Discovery  line 88 C/C++ Problem
'LED5_GPIO_CLK' undeclared here (not in a function) stm32f072b_discovery.c  /STM32F072B-Discovery/Drivers/BSP/STM32F072B-Discovery  line 88 C/C++ Problem
conflicting types for 'GPIO_InitTypeDef'    STM32F072B-Discovery        line 156    C/C++ Problem
'RCC_APB2Periph_SYSCFG' undeclared (first use in this function) stm32f072b_discovery.c  /STM32F072B-Discovery/Drivers/BSP/STM32F072B-Discovery  line 211    C/C++ Problem