pipx: apply fixes that allow pipx to build with new gcc

flight/PiOS/STM32F10x/link_STM32103CB_PIPXTREME_sections.ld

@@ -98,15 +98,8 @@ SECTIONS
         _init_stack_top = . - 4 ;
     } > SRAM
 
-    
-    _free_ram = . ;
-    .free_ram (NOLOAD) :
-    {
-	. = ORIGIN(SRAM) + LENGTH(SRAM) - _free_ram ;
-        /* This is used by the startup in order to initialize the .bss section */
-	_ebss = . ;
-	_eram = . ;
-    } > SRAM
+    _eram = ORIGIN(SRAM) + LENGTH(SRAM) ;
+    _ebss = _eram;
 
     /* keep the heap section at the end of the SRAM
      * this will allow to claim the remaining bytes not used

flight/PipXtreme/Makefile

@@ -53,7 +53,7 @@ USE_GPS ?= NO
 USE_I2C ?= YES
 
 # Set to YES when using Code Sourcery toolchain
-CODE_SOURCERY ?= YES
+CODE_SOURCERY ?= NO
 
 # Remove command is different for Code Sourcery on Windows
 ifeq ($(CODE_SOURCERY), YES)

flight/PipXtreme/System/pios_board.c

@@ -190,6 +190,10 @@ void PIOS_Board_Init(void) {
 
 #if defined(PIOS_INCLUDE_USB_HID)
 
+	if (!usb_hid_present) {
+		PIOS_Assert(0);
+	}
+
 	/* Configure the usb HID port */
 #if defined(PIOS_INCLUDE_COM)
 	{