ARM: tidy compilation flags

armsrc/Makefile

@@ -31,8 +31,7 @@ endif
 #remove one of the following defines and comment out the relevant line
 #in the next section to remove that particular feature from compilation.
 # NO space,TABs after the "\" sign.
-APP_CFLAGS = $(PLATFORM_DEFS) \
-             -ffunction-sections -fdata-sections
+APP_CFLAGS = $(PLATFORM_DEFS)
 
 SRC_LF = lfops.c lfsampling.c pcf7931.c lfdemod.c lfadc.c
 SRC_HF = hfops.c
@@ -115,8 +114,7 @@ APP_CFLAGS += $(LZ4_CFLAGS)
 APP_CFLAGS += -I../common/lz4
 
 # stdint.h provided locally until GCC 4.5 becomes C99 compliant,
-# stack-protect , no-pie reduces size on Gentoo Hardened 8.2 gcc
-APP_CFLAGS += -I. -fno-stack-protector -fno-pie
+APP_CFLAGS += -I.
 
 # Compile these in thumb mode (small size)
 THUMBSRC = start.c \

bootrom/Makefile

@@ -34,10 +34,10 @@ VERSIONSRC = version_pm3.c
 # THUMBSRC :=
 
 # stdint.h provided locally until GCC 4.5 becomes C99 compliant
-APP_CFLAGS = -I. -ffunction-sections -fdata-sections -DAS_BOOTROM
+APP_CFLAGS = -I. -DAS_BOOTROM
 
-# stack-protect , no-pie reduces size on Gentoo Hardened 8.2 gcc,  no-common makes sure uninitialized vars don't end up in COMMON area
-APP_CFLAGS += -fno-stack-protector -fno-pie -fno-common
+# no-common makes sure uninitialized vars don't end up in COMMON area
+APP_CFLAGS += -fno-common
 
 ifneq (,$(findstring WITH_FLASH,$(PLATFORM_DEFS)))
 	APP_CFLAGS += -DWITH_FLASH

common_arm/Makefile.common

@@ -48,7 +48,6 @@ VPATH = . ../common_arm ../common ../common/crapto1 ../common/mbedtls ../common/
 
 INCLUDES = ../include/proxmark3_arm.h ../include/at91sam7s512.h ../include/config_gpio.h ../include/pm3_cmd.h
 
-ARMCFLAGS = -mthumb-interwork -fno-builtin
 DEFCFLAGS = -Wall -Werror -Os -pedantic -fstrict-aliasing -pipe
 
 # Some more warnings we want as errors:
@@ -99,9 +98,14 @@ ifeq ($(NOERROR),1)
 endif
 
 CROSS_CFLAGS ?= $(DEFCFLAGS)
-CROSS_CFLAGS += $(ARMCFLAGS) -c $(INCLUDE) -std=c99 -DON_DEVICE $(APP_CFLAGS)
+CROSS_CFLAGS += -c -std=c99 -mthumb-interwork -fno-builtin -ffunction-sections -fdata-sections
+# stack-protect, no-pie reduces size on Gentoo Hardened 8.2 gcc
+CROSS_CFLAGS += -fno-stack-protector -fno-pie
+CROSS_CFLAGS += -DON_DEVICE $(INCLUDE) $(APP_CFLAGS)
+
+CROSS_LDFLAGS += -nostartfiles -nodefaultlibs -Wl,--gc-sections -Wl,--build-id=none -Wl,--nmagic
+#CROSS_LDFLAGS += -Wl,--print-gc-sections
 
-CROSS_LDFLAGS += -nostartfiles -nodefaultlibs -Wl,-gc-sections -Wl,--build-id=none -n
 LIBS = -lgcc
 
 # Flags to generate temporary dependency files