2013/3/17 Jens Mehler <jens.mehler@xxxxxxxxxx>: > Hi, > > the problem I keep running into is something that I don't fully > understand (yet). > I wrote a new backend for GCC, ported the GNU-Toolchain to my target and > got it running. > > The next thing I did: > I wrote a small helloworld.c a start.s and an end.s. > Everything that is needed is included in those files. When building the > program myself: > eco32-elf-gcc -S helloworld.c > eco32-elf-as -o hello.o start.s helloworld.s end.s > eco32-elf-ld -o hello.elf hello.o > everything works like a charm. The program even runs in the simulator > (after using eco32-elf-objdump -O binary hello.elf hello.bin) > > After that I tried using only gcc: > gcc -o hello.elf start.s helloworld.c end.s > after that I got "ld can't find crt0.o". Hi Jens, It is controlled by spec mechanism. The following is the link for its syntax: http://gcc.gnu.org/onlinedocs/gcc/Spec-Files.html In your case, I think you should define your own STARTFILE_SPEC and ENDFILE_SPEC to guide gcc driver using start.o and end.o files. Best regards, jasonwucj
