I created a linker script file as memory.ld –
MEMORY
{
MYMEMORY(rw) : ORIGIN = 0x0041c620 , LENGTH = 30
}
.myvars (NOLOAD) :
{
*(.myvarloc)
} > MYMEMORY
In my c program :
__attribute__((section(".myvarloc")))
uint8 measurements[30];
I am using eclipse IDE on linux rtos. I added –T memory.ld in project –
properties -- linker – libraries – miscellaneous in eclipse I am
creating this because : I want a fixed memory address for the variable
measurements of size 30 starting from 0x0041c620 .
My question : Is it right way of doing this ?? If I do like above : I am
getting error as – Linker input file unused and linking not done.
Hemanth Venkatappa wrote: > Linker input file unused and linking not done. Well, if you are not linking at all, why a linker script? I guess there won't be much help without knowing the exact commandline(s) you are using.
Presumably, the command line comes with -c -Werror :-)
I added project –- properties -- C/C++ Build -- Settings -- GCC C linker –- miscellaneous : -T memory.ld project –- properties -- C/C++ Build -- Settings -- GCC C compiler –- Miscellaneous : -c -fmessage-length=0 -std=gnu99 project –- properties -- C/C++ Build -- Settings -- GCC C linker : gcc -Wall -lrt -pthread -ld
Again, please post your commandlines. Don't expect others to use the same IDE as you are using. Somehow, Eclipse will certainly be able to tell you which commands it is invoking.
**** Build of configuration Debug for project FEBRUARY **** make all Building target: FEBRUARY Invoking: GCC C Linker gcc -Wall -lrt -pthread -ld -T -L /home/user/workspace/FEBRUARY/Debug./memory.ld -o "FEBRUARY" ./src/LocatedVars.o ./src/MAIN.o ./src/xcp.o ./src/xcp_auto_conf.o ./src/xcp_callbacks.o ./src/xcp_cmd.o ./src/xcp_cmdcalpage.o ./src/xcp_cmdchecksum.o ./src/xcp_cmdconnect.o ./src/xcp_cmddaq.o ./src/xcp_cmddownload.o ./src/xcp_cmddyndaq.o ./src/xcp_cmdflash.o ./src/xcp_cmdseednkey.o ./src/xcp_cmdupload.o ./src/xcp_daq.o ./src/xcp_event.o ./src/xcp_stim.o ./src/xcp_target.o ./src/xcpip.o ./src/xcpip_auto_conf.o ./src/xcpip_getrxbuf.o ./src/xcpip_gettxbuf.o ./src/xcpip_init.o ./src/xcpip_peekrxbuf.o ./src/xcpip_resume.o ./src/xcpip_rxcallback.o ./src/xcpip_rxnext.o ./src/xcpip_txcallback.o ./src/xcpip_txnext.o gcc: error: /home/user/workspace/FEBRUARY/Debug./memory.ld: No such file or directory make: *** [FEBRUARY] Error 1 **** Build Finished **** I am using the IDE and just build it by pressing the ctrl + b.
Hemanth Venkatappa wrote: > -L /home/user/workspace/FEBRUARY/Debug./memory.ld You are trying to specify the linker script as a linker pathname (where it is going to search for libraries). No idea how you can convince your Eclipse plugin to not insert the -L, you have to read the plugin documentation. Also, I guess your memory.ld is actually located at /home/user/workspace/FEBRUARY/memory.ld rather than in the build directory. You probably must prefix it with "../" . But that won't help you as long as Eclipse expects your linker script to be a library.