Mildly more correct linker flags

Author: mark9064

gcc_nrf52-mcuboot.ld

@@ -18,7 +18,6 @@
  */
 
 SEARCH_DIR(.)
-GROUP(-lgcc -lc -lnosys)
 
 MCUBOOT_SIZE = 0x8000;
 SCRATCH_SIZE = 0x1000;

gcc_nrf52.ld

@@ -24,7 +24,6 @@
  */
 
 SEARCH_DIR(.)
-GROUP(-lgcc -lc -lnosys)
 
 MCUBOOT_SIZE = 0x8000;
 SCRATCH_SIZE = 0x1000;

src/CMakeLists.txt

@@ -781,7 +781,7 @@ link_directories(
 )
 
 
-set(COMMON_FLAGS -MP -MD -mthumb -mabi=aapcs -ftree-vrp -ffunction-sections -fdata-sections -fno-strict-aliasing -fno-builtin -fshort-enums -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -fstack-usage -fno-exceptions -fno-non-call-exceptions)
+set(COMMON_FLAGS -MP -MD -mthumb -mabi=aapcs -ftree-vrp -ffunction-sections -fdata-sections -fno-strict-aliasing -fno-builtin -fshort-enums -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -fstack-usage -fno-exceptions -fno-non-call-exceptions --specs=nano.specs)
 set(WARNING_FLAGS -Wall -Wextra -Warray-bounds=2 -Wformat=2 -Wformat-overflow=2 -Wformat-truncation=2 -Wformat-nonliteral -Wno-missing-field-initializers -Wno-unknown-pragmas -Wno-expansion-to-defined -Wreturn-type -Werror=return-type -Werror)
 set(DEBUG_FLAGS -Og -g3)
 set(RELEASE_FLAGS -Os)
@@ -930,7 +930,7 @@ target_compile_options(${EXECUTABLE_NAME} PUBLIC
 
 set_target_properties(${EXECUTABLE_NAME} PROPERTIES
         SUFFIX ".out"
-        LINK_FLAGS "-mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT} -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -lc -lnosys -lm -Wl,-Map=${EXECUTABLE_FILE_NAME}.map"
+        LINK_FLAGS "-mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT} --specs=nosys.specs -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -Wl,-Map=${EXECUTABLE_FILE_NAME}.map"
         )
 
 add_custom_command(TARGET ${EXECUTABLE_NAME}
@@ -965,7 +965,7 @@ target_compile_options(${EXECUTABLE_MCUBOOT_NAME} PUBLIC
 
 set_target_properties(${EXECUTABLE_MCUBOOT_NAME} PROPERTIES
         SUFFIX ".out"
-        LINK_FLAGS "-mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT_MCUBOOT} -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -lc -lnosys -lm -Wl,-Map=${EXECUTABLE_MCUBOOT_FILE_NAME}.map"
+        LINK_FLAGS "-mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT_MCUBOOT} --specs=nosys.specs -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -Wl,-Map=${EXECUTABLE_MCUBOOT_FILE_NAME}.map"
         )
 
 add_custom_command(TARGET ${EXECUTABLE_MCUBOOT_NAME}
@@ -1008,7 +1008,7 @@ target_compile_options(${EXECUTABLE_RECOVERY_NAME} PUBLIC
 
 set_target_properties(${EXECUTABLE_RECOVERY_NAME} PROPERTIES
         SUFFIX ".out"
-        LINK_FLAGS "-mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT} -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -lc -lnosys -lm -Wl,-Map=${EXECUTABLE_RECOVERY_FILE_NAME}.map"
+        LINK_FLAGS "-mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT} --specs=nosys.specs -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -Wl,-Map=${EXECUTABLE_RECOVERY_FILE_NAME}.map"
         )
 
 add_custom_command(TARGET ${EXECUTABLE_RECOVERY_NAME}
@@ -1040,7 +1040,7 @@ target_compile_options(${EXECUTABLE_RECOVERY_MCUBOOT_NAME} PUBLIC
 
 set_target_properties(${EXECUTABLE_RECOVERY_MCUBOOT_NAME} PROPERTIES
         SUFFIX ".out"
-        LINK_FLAGS "-mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT_MCUBOOT} -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -lc -lnosys -lm -Wl,-Map=${EXECUTABLE_GRAPHICS_FILE_NAME}.map"
+        LINK_FLAGS "-mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT_MCUBOOT} --specs=nosys.specs -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -Wl,-Map=${EXECUTABLE_GRAPHICS_FILE_NAME}.map"
         )
 
 add_custom_command(TARGET ${EXECUTABLE_RECOVERY_MCUBOOT_NAME}
@@ -1083,7 +1083,7 @@ add_dependencies(${EXECUTABLE_RECOVERYLOADER_NAME} ${EXECUTABLE_RECOVERY_MCUBOOT
 
 set_target_properties(${EXECUTABLE_RECOVERYLOADER_NAME} PROPERTIES
         SUFFIX ".out"
-        LINK_FLAGS "-mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT} -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -lc -lnosys -lm -Wl,-Map=${EXECUTABLE_RECOVERYLOADER_FILE_NAME}.map"
+        LINK_FLAGS "-mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT} --specs=nosys.specs -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -Wl,-Map=${EXECUTABLE_RECOVERYLOADER_FILE_NAME}.map"
         )
 
 add_custom_command(TARGET ${EXECUTABLE_RECOVERYLOADER_NAME}
@@ -1118,7 +1118,7 @@ add_dependencies(${EXECUTABLE_MCUBOOT_RECOVERYLOADER_NAME} ${EXECUTABLE_RECOVERY
 
 set_target_properties(${EXECUTABLE_MCUBOOT_RECOVERYLOADER_NAME} PROPERTIES
         SUFFIX ".out"
-        LINK_FLAGS "-mthumb -mabi=aapcs -std=gnu++98 -std=c99 -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT_MCUBOOT} -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -lc -lnosys -lm -Wl,-Map=${EXECUTABLE_MCUBOOT_RECOVERYLOADER_FILE_NAME}.map"
+        LINK_FLAGS "-mthumb -mabi=aapcs -std=gnu++98 -std=c99 -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT_MCUBOOT} --specs=nosys.specs -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -Wl,-Map=${EXECUTABLE_MCUBOOT_RECOVERYLOADER_FILE_NAME}.map"
         )
 
 add_custom_command(TARGET ${EXECUTABLE_MCUBOOT_RECOVERYLOADER_NAME}