riscv64-linux-gnu-ld: undefined reference to `fseek' - c

Question

Recently,I met with this problem under vmware ubuntu 22.04:
riscv64-linux-gnu-ld: loader.c:(.text.naive_uload+0x4c): undefined reference to fseek' riscv64-linux-gnu-ld: loader.c:(.text.naive_uload+0x78): undefined reference to fread'
riscv64-linux-gnu-ld: loader.c:(.text.naive_uload+0xbc): undefined reference to fseek' riscv64-linux-gnu-ld: loader.c:(.text.naive_uload+0xe0): undefined reference to fread'
I was using crossing compiler
My makefile is:
# Makefile for AbstractMachine Kernels and Libraries
### *Get a more readable version of this Makefile* by `make html` (requires python-markdown)
html:
cat Makefile | sed 's/^\([^#]\)/ \1/g' | markdown_py > Makefile.html
.PHONY: html
## 1. Basic Setup and Checks
### Default to create a bare-metal kernel image
ifeq ($(MAKECMDGOALS),)
MAKECMDGOALS = image
.DEFAULT_GOAL = image
endif
### Override checks when `make clean/clean-all/html`
ifeq ($(findstring $(MAKECMDGOALS),clean|clean-all|html),)
### Print build info message
$(info # Building $(NAME)-$(MAKECMDGOALS) [$(ARCH)])
### Check: environment variable `$AM_HOME` looks sane
ifeq ($(wildcard $(AM_HOME)/am/include/am.h),)
$(error $$AM_HOME must be an AbstractMachine repo)
endif
### Check: environment variable `$ARCH` must be in the supported list
ARCHS = $(basename $(notdir $(shell ls $(AM_HOME)/scripts/*.mk)))
ifeq ($(filter $(ARCHS), $(ARCH)), )
$(error Expected $$ARCH in {$(ARCHS)}, Got "$(ARCH)")
endif
### Extract instruction set architecture (`ISA`) and platform from `$ARCH`. Example: `ARCH=x86_64-qemu -> ISA=x86_64; PLATFORM=qemu`
ARCH_SPLIT = $(subst -, ,$(ARCH))
ISA = $(word 1,$(ARCH_SPLIT))
PLATFORM = $(word 2,$(ARCH_SPLIT))
### Check if there is something to build
ifeq ($(flavor SRCS), undefined)
$(error Nothing to build)
endif
### Checks end here
endif
## 2. General Compilation Targets
### Create the destination directory (`build/$ARCH`)
WORK_DIR = $(shell pwd)
DST_DIR = $(WORK_DIR)/build/$(ARCH)
$(shell mkdir -p $(DST_DIR))
### Compilation targets (a binary image or archive)
IMAGE_REL = build/$(NAME)-$(ARCH)
IMAGE = $(abspath $(IMAGE_REL))
ARCHIVE = $(WORK_DIR)/build/$(NAME)-$(ARCH).a
### Collect the files to be linked: object files (`.o`) and libraries (`.a`)
OBJS = $(addprefix $(DST_DIR)/, $(addsuffix .o, $(basename $(SRCS))))
LIBS := $(sort $(LIBS) am klib) # lazy evaluation ("=") causes infinite recursions
LINKAGE = $(OBJS) \
$(addsuffix -$(ARCH).a, $(join \
$(addsuffix /build/, $(addprefix $(AM_HOME)/, $(LIBS))), \
$(LIBS) ))
## 3. General Compilation Flags
### (Cross) compilers, e.g., mips-linux-gnu-g++
AS = $(CROSS_COMPILE)gcc
CC = $(CROSS_COMPILE)gcc
CXX = $(CROSS_COMPILE)g++
LD = $(CROSS_COMPILE)ld
OBJDUMP = $(CROSS_COMPILE)objdump
OBJCOPY = $(CROSS_COMPILE)objcopy
READELF = $(CROSS_COMPILE)readelf
### Compilation flags
INC_PATH += $(WORK_DIR)/include $(addsuffix /include/, $(addprefix $(AM_HOME)/, $(LIBS)))
INCFLAGS += $(addprefix -I, $(INC_PATH))
CFLAGS += -O2 -MMD -Wall -Werror $(INCFLAGS) \
-D__ISA__=\"$(ISA)\" -D__ISA_$(shell echo $(ISA) | tr a-z A-Z)__ \
-D__ARCH__=$(ARCH) -D__ARCH_$(shell echo $(ARCH) | tr a-z A-Z | tr - _) \
-D__PLATFORM__=$(PLATFORM) -D__PLATFORM_$(shell echo $(PLATFORM) | tr a-z A-Z | tr - _) \
-DARCH_H=\"arch/$(ARCH).h\" \
-fno-asynchronous-unwind-tables -fno-builtin -fno-stack-protector \
-Wno-main -U_FORTIFY_SOURCE
CXXFLAGS += $(CFLAGS) -ffreestanding -fno-rtti -fno-exceptions
ASFLAGS += -MMD $(INCFLAGS)
LDFLAGS += -z noexecstack
## 4. Arch-Specific Configurations
### Paste in arch-specific configurations (e.g., from `scripts/x86_64-qemu.mk`)
-include $(AM_HOME)/scripts/$(ARCH).mk
### Fall back to native gcc/binutils if there is no cross compiler
ifeq ($(wildcard $(shell which $(CC))),)
$(info # $(CC) not found; fall back to default gcc and binutils)
CROSS_COMPILE :=
endif
## 5. Compilation Rules
### Rule (compile): a single `.c` -> `.o` (gcc)
$(DST_DIR)/%.o: %.c
#mkdir -p $(dir $#) && echo + CC $<
#$(CC) -std=gnu11 $(CFLAGS) -c -o $# $(realpath $<)
### Rule (compile): a single `.cc` -> `.o` (g++)
$(DST_DIR)/%.o: %.cc
#mkdir -p $(dir $#) && echo + CXX $<
#$(CXX) -std=c++17 $(CXXFLAGS) -c -o $# $(realpath $<)
### Rule (compile): a single `.cpp` -> `.o` (g++)
$(DST_DIR)/%.o: %.cpp
#mkdir -p $(dir $#) && echo + CXX $<
#$(CXX) -std=c++17 $(CXXFLAGS) -c -o $# $(realpath $<)
### Rule (compile): a single `.S` -> `.o` (gcc, which preprocesses and calls as)
$(DST_DIR)/%.o: %.S
#mkdir -p $(dir $#) && echo + AS $<
#$(AS) $(ASFLAGS) -c -o $# $(realpath $<)
### Rule (recursive make): build a dependent library (am, klib, ...)
$(LIBS): %:
#$(MAKE) -s -C $(AM_HOME)/$* archive
### Rule (link): objects (`*.o`) and libraries (`*.a`) -> `IMAGE.elf`, the final ELF binary to be packed into image (ld)
$(IMAGE).elf: $(OBJS) am $(LIBS)
#echo + LD "->" $(IMAGE_REL).elf
#$(LD) $(LDFLAGS) -o $(IMAGE).elf --start-group $(LINKAGE) --end-group
### Rule (archive): objects (`*.o`) -> `ARCHIVE.a` (ar)
$(ARCHIVE): $(OBJS)
#echo + AR "->" $(shell realpath $# --relative-to .)
#ar rcs $(ARCHIVE) $(OBJS)
### Rule (`#include` dependencies): paste in `.d` files generated by gcc on `-MMD`
-include $(addprefix $(DST_DIR)/, $(addsuffix .d, $(basename $(SRCS))))
## 6. Miscellaneous
### Build order control
image: image-dep
archive: $(ARCHIVE)
image-dep: $(OBJS) am $(LIBS)
#echo \# Creating image [$(ARCH)]
.PHONY: image image-dep archive run $(LIBS)
### Clean a single project (remove `build/`)
clean:
rm -rf Makefile.html $(WORK_DIR)/build/
.PHONY: clean
### Clean all sub-projects within depth 2 (and ignore errors)
CLEAN_ALL = $(dir $(shell find . -mindepth 2 -name Makefile))
clean-all: $(CLEAN_ALL) clean
$(CLEAN_ALL):
-#$(MAKE) -s -C $# clean
.PHONY: clean-all $(CLEAN_ALL)
#HAS_NAVY = 1
RAMDISK_FILE = build/ramdisk.img
NAME = nanos-lite
SRCS = $(shell find -L ./src/ -name "*.c" -o -name "*.cpp" -o -name "*.S")
include $(AM_HOME)/Makefile
ifeq ($(ARCH),native)
ISA = am_native
else
INC_PATH += include $(NAVY_HOME)/libs/libc/include
endif
./src/resources.S: $(RAMDISK_FILE)
#touch $#
ifeq ($(HAS_NAVY),)
files = $(RAMDISK_FILE) src/files.h src/syscall.h
# create an empty file if it does not exist
$(foreach f,$(files),$(if $(wildcard $f),, $(shell touch $f)))
else
ifeq ($(wildcard $(NAVY_HOME)/libs/libos/src/syscall.h),)
$(error $$NAVY_HOME must be a Navy-apps repo)
endif
update:
$(MAKE) -s -C $(NAVY_HOME) ISA=$(ISA) ramdisk
#ln -sf $(NAVY_HOME)/build/ramdisk.img $(RAMDISK_FILE)
#ln -sf $(NAVY_HOME)/build/ramdisk.h src/files.h
#ln -sf $(NAVY_HOME)/libs/libos/src/syscall.h src/syscall.h
.PHONY: update
endif
I was fully unaware of what was happening.Who can help me,please!!!
Solve the cross compile link error