variable assignment types

1 files changed, 9 insertions, 9 deletions

diff --git a/build/Makefile b/build/Makefile
index c657748..ac6c818 100644
--- a/build/Makefile
+++ b/build/Makefile
@@ -1,19 +1,19 @@
-HOST_CC=gcc
+HOST_CC ?= gcc
 
-HOST_CFLAGS=-Wall -std=gnu99 -I../src/lib/rs232 -O3
+HOST_CFLAGS ?= -Wall -std=gnu99 -I../src/lib/rs232 -O3
 
-ARM_CC=arm-none-eabi-gcc
+ARM_CC ?= arm-none-eabi-gcc
 
-ARM_CFLAGS=-mcpu=cortex-a7 -ffreestanding -std=gnu11 -Wall -Wextra $(addprefix -I, $(dirs))
-ELFFLAGS=-nostdlib -lgcc
+ARM_CFLAGS ?= -mcpu=cortex-a7 -ffreestanding -std=gnu11 -Wall -Wextra $(addprefix -I, $(dirs))
+ELFFLAGS ?= -nostdlib -lgcc
 
-KERNEL_STAGE2_OBJECTS=setup.o interrupt_vector.o interrupts.o uart.o demo_functionality.o paging.o ramfs_embeddable.o ramfs.o strings.o io.o atags.o scheduler.o
+KERNEL_STAGE2_OBJECTS := setup.o interrupt_vector.o interrupts.o uart.o demo_functionality.o paging.o ramfs_embeddable.o ramfs.o strings.o io.o atags.o scheduler.o
 
-PL_0_TEST_OBJECTS=PL0_utils.o svc.o PL0_test.o strings.o io.o
+PL_0_TEST_OBJECTS := PL0_utils.o svc.o PL0_test.o strings.o io.o
 
-LOADER_STAGE2_OBJECTS=uart.o strings.o io.o loader_stage2.o
+LOADER_STAGE2_OBJECTS := uart.o strings.o io.o loader_stage2.o
 
-RAMFS_FILES=PL0_test.img
+RAMFS_FILES := PL0_test.img
 
 all : kernel.img