lpc17xx_rtc.o error

you are "building" the project. before building the entire project, Compile individual files. this helps you to check if there are any errors in individual C source files.

Compile the lpc17xx_rtc.c file. You will see some errors. try to solve those errors.

errors mean:
CLKPWR_ConfigPPWR & check_failed symbols used in the file "lpc17xx_rtc.c" are not defined.

thanks
How can I compile just lpc17xx_rtc.c file ??(right click an then translate?)
when I translate lpc17xx_rtc.c there is no error

compiling lpc17xx_rtc.c...
C:\Keil\ARM\CMSIS\Drivers\lpc17xx_rtc.c(734): warning: #186-D: pointless comparison of unsigned integer with zero
C:\Keil\ARM\CMSIS\Drivers\lpc17xx_rtc.c(758): warning: #186-D: pointless comparison of unsigned integer with zero
C:\Keil\ARM\CMSIS\Drivers\lpc17xx_rtc.c - 0 Error(s), 2Warning(s).

CLKPWR_ConfigPPWR used like this in lpc17xx_rtc.c

void RTC_Init (LPC_RTC_TypeDef *RTCx)
{
        CHECK_PARAM(PARAM_RTCx(RTCx));

        /* Set up clock and power for RTC module */
        CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCRTC, ENABLE);

        // Clear all register to be default
        RTCx->ILR = 0x00;
        RTCx->CCR = 0x00;
        RTCx->CIIR = 0x00;
        RTCx->AMR = 0xFF;
        RTCx->CALIBRATION = 0x00;

what should I do?

If you are not getting any errors, that means the compilation is ok.
(to "Translate" press "Ctrl+F7" _Shortcut keys_)

Now,
"CLKPWR_ConfigPPWR" is a function called from your "lpc17xx_rtc.c" file, but the linker is unable to find the function (in the "lpc17xx_rtc.c" file).

i m sure that the function is defined in some other file. may be "lpc17xx_clkpwr.c" file!!

so how do you tell(inform) the linker that the function code exists in some other file?

thanks
I Add "lpc17xx_clkpwr.c" file to my project so, I don't face with that error
but I have 1 error yet
linking...
flash_fs.axf: Error: L6218E: Undefined symbol check_failed (referred from lpc17xx_rtc.o).

I'm found it!!!

check_failed function is in "lpc17xx_libcfg_default.c"

thanks in advanced