Merge pull request #435 from janekm/master

fixes to NRF51822 GCC template

libraries/mbed/targets/cmsis/TARGET_NORDIC/TARGET_MCU_NRF51822/TOOLCHAIN_GCC_ARM/NRF51822.ld

@@ -43,8 +43,8 @@ SECTIONS
 		KEEP(*(.Vectors))
 		*(.text*)
 
-		*(.init)
-		*(.fini)
+		KEEP(*(.init))
+		KEEP(*(.fini))
 
 		/* .ctors */
 		*crtbegin.o(.ctors)
@@ -62,7 +62,7 @@ SECTIONS
 
 		*(.rodata*)
 
-		*(.eh_frame*)
+		KEEP(*(.eh_frame*))
 	} > FLASH
 
 
@@ -89,22 +89,22 @@ SECTIONS
 		. = ALIGN(4);
 		/* preinit data */
 		PROVIDE_HIDDEN (__preinit_array_start = .);
-		*(.preinit_array)
+		KEEP(*(.preinit_array))
 		PROVIDE_HIDDEN (__preinit_array_end = .);
 
 		. = ALIGN(4);
 		/* init data */
 		PROVIDE_HIDDEN (__init_array_start = .);
-		*(SORT(.init_array.*))
-		*(.init_array)
+		KEEP(*(SORT(.init_array.*)))
+		KEEP(*(.init_array))
 		PROVIDE_HIDDEN (__init_array_end = .);
 
 
 		. = ALIGN(4);
 		/* finit data */
 		PROVIDE_HIDDEN (__fini_array_start = .);
-		*(SORT(.fini_array.*))
-		*(.fini_array)
+		KEEP(*(SORT(.fini_array.*)))
+		KEEP(*(.fini_array))
 		PROVIDE_HIDDEN (__fini_array_end = .);
 
 		*(.jcr)
@@ -149,4 +149,3 @@ SECTIONS
 	/* Check if data + heap + stack exceeds RAM limit */
 	ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
 }
-

workspace_tools/export/gcc_arm_nrf51822.tmpl

@@ -23,7 +23,7 @@ CPU = -mcpu=cortex-m0 -mthumb
 CC_FLAGS = $(CPU) -c -g -fno-common -fmessage-length=0 -Wall -fno-exceptions -ffunction-sections -fdata-sections
 CC_SYMBOLS = {% for s in symbols %}-D{{s}} {% endfor %}
 
-LD_FLAGS = -mcpu=cortex-m0 -mthumb -Wl,--gc-sections --specs=nano.specs -u _printf_float -u _scanf_float
+LD_FLAGS = -mcpu=cortex-m0 -mthumb -Wl,--gc-sections -Wl,--wrap=main --specs=nano.specs -u _printf_float -u _scanf_float
 LD_SYS_LIBS = -lstdc++ -lsupc++ -lm -lc -lgcc -lnosys
 
 ifeq ($(DEBUG), 1)