undefined reference to `_start', undefined reference to `_data'

Hi, I'm trying to compile a project using Keil and GNUARM. Compiler compiles .c file but linker writes: Build target 'Target 1' assembling Startup.s... compiling Serial.c... compiling Blinky.c....
undefined reference to `_start', undefined reference to `_data'

Hi, I'm trying to compile a project using Keil and GNUARM. Compiler compiles .c file but linker writes: Build target 'Target 1' assembling Startup.s... compiling Serial.c... compiling Blinky.c....
errors:undefined reference

hi, i'm tryin out a client server application where when i compile the prog in gcc it gives a list of errors sayin "undefined reference to.." all external references in that module.... u've suggested...
reference Manuals

GPIO_InitTypeDef GPIO_InitStructure; Dear All please provide me documentation that are describing all about above type instructions Any reference Manuals
reference Manuals

GPIO_InitTypeDef GPIO_InitStructure; Dear All please provide me documentation that are describing all about above type instructions Any reference Manuals