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unable to build for Luckfox pico mini B (Ubuntu) #293

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dodgekaze opened this issue Aug 28, 2024 · 1 comment
Open

unable to build for Luckfox pico mini B (Ubuntu) #293

dodgekaze opened this issue Aug 28, 2024 · 1 comment

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@dodgekaze
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I am trying to build the driver for the Luckfox Pico Mini B. Once I start the build process and once it hits the drivers/wifi part and tries to build the rtl8188eu it provides me with the following error:

  MODPOST /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/Module.symvers
ERROR: modpost: module 8188eu uses symbol kernel_read from namespace VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver, but does not import it.
ERROR: modpost: module 8188eu uses symbol filp_open from namespace VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver, but does not import it.
make[5]: *** [scripts/Makefile.modpost:169: /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/Module.symvers] Error 1
make[5]: *** Deleting file '/home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/Module.symvers'
make[4]: *** [Makefile:1819: modules] Error 2
make[4]: Leaving directory '/home/fredsco/dev/luckfox-pico/sysdrv/source/kernel'
make[3]: *** [Makefile:2068: modules] Error 2
make[3]: Leaving directory '/home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu'
make[2]: *** [Makefile:78: build-usb] Error 2
make[2]: Leaving directory '/home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi'
make[1]: *** [Makefile:23: all] Error 2
make[1]: Leaving directory '/home/fredsco/dev/luckfox-pico/sysdrv/drv_ko'
make: *** [Makefile:685: drv] Error 2
make: Leaving directory '/home/fredsco/dev/luckfox-pico/sysdrv'
[build.sh:error] Running build_sysdrv failed!
[build.sh:error] exit code 2 from line 653:
[build.sh:info]     make -C ${SDK_SYSDRV_DIR}

I have made the following modifications

  • in the make file set arm to Y and i386PC to N (I figured because the target device; Luckfox Pico mini b is arm based)
CONFIG_PLATFORM_I386_PC = n
CONFIG_PLATFORM_ARM_RPI = y

below modules: (line 2067) I added after the first line:

modules:
	$(MAKE) ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) -C $(KSRC) M=$(shell pwd)  modules
	cp $(shell pwd)/8188eu.ko $(M_OUT_DIR)
	@mkdir -p $(SYSDRV_DIR_OUT_ROOTFS)/lib/firmware/rtlwifi
	cp $(shell pwd)/rtl8188eufw.bin $(SYSDRV_DIR_OUT_ROOTFS)/lib/firmware/rtlwifi

In the pico sdk makefile I have added: (yes I cloned this repo and changed the folder name from rtl8188eus to rtl8188eu

build-usb:
	@make -C rtl8188eu/

Here is the full log when the build process arrives at the rtl8188 driver:

make[3]: Entering directory '/home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu'
make ARCH=arm CROSS_COMPILE=arm-rockchip830-linux-uclibcgnueabihf- -C /home/fredsco/dev/luckfox-pico/sysdrv/source/kernel M=/home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu  modules
make[4]: Entering directory '/home/fredsco/dev/luckfox-pico/sysdrv/source/kernel'
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_cmd.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_security.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_debug.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_io.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_ioctl_query.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_ioctl_set.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_ieee80211.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_mlme.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_mlme_ext.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_mi.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_wlan_util.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_vht.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_pwrctrl.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_rf.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_recv.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_sta_mgt.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_ap.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/mesh/rtw_mesh.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/mesh/rtw_mesh_pathtbl.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/mesh/rtw_mesh_hwmp.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_xmit.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_p2p.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_rson.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_tdls.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_br_ext.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_iol.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_sreset.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_btcoex_wifionly.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_btcoex.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_beamforming.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_odm.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_rm.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_rm_fsm.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/efuse/rtw_efuse.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/os_dep/osdep_service.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/os_dep/linux/os_intfs.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/os_dep/linux/usb_intf.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/os_dep/linux/usb_ops_linux.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/os_dep/linux/ioctl_linux.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/os_dep/linux/xmit_linux.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/os_dep/linux/mlme_linux.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/os_dep/linux/recv_linux.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/os_dep/linux/ioctl_cfg80211.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/os_dep/linux/rtw_cfgvendor.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/os_dep/linux/wifi_regd.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/os_dep/linux/rtw_android.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/os_dep/linux/rtw_proc.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/os_dep/linux/rtw_rhashtable.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/os_dep/linux/ioctl_mp.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/hal_intf.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/hal_com.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/hal_com_phycfg.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/hal_phy.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/hal_dm.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/hal_dm_acs.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/hal_btcoex_wifionly.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/hal_btcoex.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/hal_mp.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/hal_mcc.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/hal_hci/hal_usb.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/led/hal_led.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/led/hal_usb_led.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/HalPwrSeqCmd.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/rtl8188e/Hal8188EPwrSeq.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/rtl8188e/rtl8188e_xmit.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/rtl8188e/rtl8188e_sreset.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/rtl8188e/rtl8188e_hal_init.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/rtl8188e/rtl8188e_phycfg.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/rtl8188e/rtl8188e_rf6052.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/rtl8188e/rtl8188e_dm.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/rtl8188e/rtl8188e_rxdesc.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/rtl8188e/rtl8188e_cmd.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/rtl8188e/hal8188e_s_fw.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/rtl8188e/hal8188e_t_fw.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/rtl8188e/usb/usb_halinit.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/rtl8188e/usb/rtl8188eu_led.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/rtl8188e/usb/rtl8188eu_xmit.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/rtl8188e/usb/rtl8188eu_recv.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/rtl8188e/usb/usb_ops_linux.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/efuse/rtl8188e/HalEfuseMask8188E_USB.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_debug.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_antdiv.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_soml.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_smt_ant.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_antdect.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_interface.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_phystatus.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_hwconfig.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_dig.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_pathdiv.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_rainfo.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_dynamictxpower.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_adaptivity.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_cfotracking.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_noisemonitor.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_beamforming.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_dfs.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/txbf/halcomtxbf.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/txbf/haltxbfinterface.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/txbf/phydm_hal_txbf_api.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_adc_sampling.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_ccx.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_psd.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_primary_cca.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_cck_pd.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_rssi_monitor.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_auto_dbg.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_math_lib.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_api.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/phydm_pow_train.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/halrf/halrf.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/halrf/halphyrf_ce.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/halrf/halrf_powertracking_ce.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/halrf/halrf_powertracking.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/halrf/halrf_kfree.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/rtl8188e/halhwimg8188e_mac.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/rtl8188e/halhwimg8188e_bb.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/rtl8188e/halhwimg8188e_rf.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/halrf/rtl8188e/halrf_8188e_ce.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/rtl8188e/phydm_regconfig8188e.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/rtl8188e/hal8188erateadaptive.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/hal/phydm/rtl8188e/phydm_rtl8188e.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/platform/platform_ops.o
  CC [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/core/rtw_mp.o
  LD [M]  /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/8188eu.o
  MODPOST /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/Module.symvers
ERROR: modpost: module 8188eu uses symbol kernel_read from namespace VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver, but does not import it.
ERROR: modpost: module 8188eu uses symbol filp_open from namespace VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver, but does not import it.
make[5]: *** [scripts/Makefile.modpost:169: /home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/Module.symvers] Error 1
make[5]: *** Deleting file '/home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu/Module.symvers'
make[4]: *** [Makefile:1819: modules] Error 2
make[4]: Leaving directory '/home/fredsco/dev/luckfox-pico/sysdrv/source/kernel'
make[3]: *** [Makefile:2068: modules] Error 2
make[3]: Leaving directory '/home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi/rtl8188eu'
make[2]: *** [Makefile:78: build-usb] Error 2
make[2]: Leaving directory '/home/fredsco/dev/luckfox-pico/sysdrv/drv_ko/wifi'
make[1]: *** [Makefile:23: all] Error 2
make[1]: Leaving directory '/home/fredsco/dev/luckfox-pico/sysdrv/drv_ko'
make: *** [Makefile:685: drv] Error 2
make: Leaving directory '/home/fredsco/dev/luckfox-pico/sysdrv'
[build.sh:error] Running build_sysdrv failed!
[build.sh:error] exit code 2 from line 653:
[build.sh:info]     make -C ${SDK_SYSDRV_DIR}
@gglluukk
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hi!
it seems that kernel at your device doesn't import these calls: kernel_read() and filp_open().

there was a similar issue: #287 (comment)

as trying easiest way first you can in code's sources:
grep -nr -e kernel_read -e filp_open *
and comment out these calls in code, compile, load driver and check if they are needed.

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@gglluukk @dodgekaze