lld seems to work (yay)

Makefile

@@ -4,15 +4,16 @@ MAKEFLAGS += --no-builtin-variables
 
 BUILD_FLAGS = --release-small -target thumbv7m-freestanding-none
 LINKER_SCRIPT = arm_cm3.ld
-OBJS = startup.o main.o
+LD_FLAGS = --gc-sections -nostdlib
+OBJS = startup.o main.o stm32f10.o core_cm3.o
 PROG = firmware
 
 %.o: %.zig
  zig build-obj ${BUILD_FLAGS} $<
 
 ${PROG}: ${OBJS}
-# zig build-exe ${BUILD_FLAGS} $(OBJS:%=--object %) --name [email protected] --linker-script ${LINKER_SCRIPT}
- arm-none-eabi-ld ${OBJS} -o [email protected] -T ${LINKER_SCRIPT} -Map [email protected] --gc-sections
+ zig build-exe ${BUILD_FLAGS} $(OBJS:%=--object %) --name $@.elf --linker-script ${LINKER_SCRIPT}
+# arm-none-eabi-ld ${OBJS} -o [email protected] -T ${LINKER_SCRIPT} -Map [email protected] ${LD_FLAGS}
 
 clean:
  rm -rf ${PROG}.* ${OBJS} $(OBJS:%.o=%.h) zig-cache