Building an Executable that Can't be Ran

I am getting vk: command not found when running vk, and getting bash: ./vk: No such file or directory when executing ./vk.

I did some research and the cause is usually that it isa 32bit exe on a 64bit machine

make builds the output to vk/_target. I cd to _target

When I run file vk I get this back.

vk: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib/ld6, not stripped

I have tried executing chmod +x vk and chmod u+x vk. I have tried every combination of typing ./vk and vk with chmod. I'm at a loss here. I have passed -m64 as an option to gcc, but that seems to be the default.

Here is my makefile

CFLAGS = -m64 -Wall -O3
CC = gcc
LINKER = ld -lc --entry main
DUMP = objdump
COPY = objcopy
TARGET_DIR = _target

SRCS := $(shell find ./ -name \*.c)
VPATH := $(sort $(dir $(SRCS)))
OBJS := $(patsubst %.c,$(TARGET_DIR)/%.o,$(notdir $(SRCS)))

$(TARGET_DIR)/vk : $(OBJS)
    $(LINKER) $^ -o $@
    $(DUMP) -D $@ > $(@:=.list)

$(TARGET_DIR)/%.o : %.c folders
    @echo "compiling $<"
    $(CC) $(CFLAGS) -c $< -o $@
    @echo "assembly dump $@"
    $(DUMP) -D $@ > $@.list

.PHONY: folders

folders:
    mkdir -p $(TARGET_DIR)

.PHONY: clean
clean:
    rm -rf $(TARGET_DIR)