Hello.We are programming the DA14531 SoC.We have:1. debug board DA14531-00FXDEVKT-U with module DA14531MOD-00F01002.2. we use IDE Keil 5.38a3. we use SDK 6.0.204. We use compiler version 6.12

We use examples only from SDK 6.0.20 (and SDK 6.0.14 also tried).We open each of the examples, compile, flash the resulting firmware in the SOC on debug board and everything works good.

Next, we need to run the HID GAMEPAD example (we will make our own HID keyboard based on it). We take the HID GAMEPAD example from Github, insert this project into the SDK in the folder with BLE examples (as stated in the instructions), enable oz Image Size optimization in the linker, enable LTO, start compilation and at the linking stage we get three errors (see below). And we don’t know what to do next. (we tried the latest version of SDK and SDK 6.0.14)Could you tell us what the error might be? we can send you the project... could you check it - does it work for you?

Build started: Project: ble_hid_gamepad*** Using Compiler 'V6.12', folder: 'C:\Keil_v5\ARM\ARMCLANG\Bin'Build target 'DA14531'assembling startup_DA14531.s...compiling nvds.c...compiling arch_console.c...compiling hardfault_handler.c...compiling nmi_handler.c...compiling arch_sleep.c...compiling arch_rom.c...compiling system_DA14531.c...compiling jump_table.c...compiling arch_hibernation.c...compiling arch_system.c...compiling arch_main.c...compiling hash.c...compiling chacha20.c...compiling otp_hdr.c...compiling syscntl.c...compiling otp_cs.c...compiling wkupct_quadec.c...compiling gpio.c...compiling adc_531.c...compiling battery.c...compiling spi_531.c...compiling spi_flash.c...compiling i2c.c...compiling i2c_eeprom.c...compiling hw_otpc_531.c...compiling trng.c...compiling dma.c...compiling uart.c...compiling rf_585.c...compiling rf_531.c...compiling rwip.c...compiling prf_utils.c...compiling rwble.c...compiling attm_db_128.c...compiling diss_task.c...compiling custom_common.c...compiling diss.c...compiling custs1.c...compiling ble_arp.c...compiling custs1_task.c...compiling prf.c...compiling hogpd_task.c...compiling hogpd.c...compiling app_security.c...compiling app_default_handlers.c...compiling app_bass.c...compiling app.c...compiling app_bass_task.c...compiling app_task.c...compiling app_security_task.c...compiling app_findme.c...compiling app_findme_task.c...compiling app_proxr.c...compiling app_proxr_task.c...compiling app_suotar.c...compiling app_diss.c...compiling app_diss_task.c...compiling app_suotar_task.c...compiling app_easy_msg_utils.c...compiling app_msg_utils.c...compiling app_entry_point.c...compiling app_easy_security.c...compiling app_easy_timer.c...compiling app_customs.c...compiling app_customs_task.c...compiling app_customs_common.c...compiling app_utils.c...compiling app_easy_whitelist.c...compiling app_bond_db.c...compiling user_custs_config.c...compiling user_custs1_def.c...compiling user_periph_setup.c...compiling app_hogpd.c...compiling app_hogpd_task.c...compiling user_gamepad.c...compiling user_peripheral.c...linking....\out_DA14531\Objects\ble_app_peripheral_531.axf: Error: L6137E: Symbol gattc_att_info_req_ind_handler was not preserved by the LTO codegen but is needed by the image..\out_DA14531\Objects\ble_app_peripheral_531.axf: Error: L6137E: Symbol gattc_read_req_ind_handler was not preserved by the LTO codegen but is needed by the image..\out_DA14531\Objects\ble_app_peripheral_531.axf: Error: L6137E: Symbol gattc_cmp_evt_handler was not preserved by the LTO codegen but is needed by the image.Not enough information to produce a SYMDEFs file.Not enough information to list image symbols.Not enough information to list load addresses in the image map.Finished: 3 information, 0 warning and 3 error messages.".\out_DA14531\Objects\ble_app_peripheral_531.axf" - 3 Error(s), 0 Warning(s).Target not created.Build Time Elapsed: 00:00:06