Kanak Nath wrote: > I've created a small .c code and it has calls to strlen() and printf(). I compiled it with arm-elf-gcc -mcpu=arm9 -c \example\test.c to generate test.o. Now I wanted to link it with arm-elf-ld test.o c:\gnude\lib\gcc-lib\arm-elf\3.3.1\libgcc.a. I get the following error: > > : undefined reference to `strlen' > test.o(.text+0x50): In function `main': > : undefined reference to `printf' Functions like strlen and printf come from the C library (such as glibc, newlib, uclibc, etc.) Libgcc is something completely different, and it only provides a small number of support routines that are used internally by the compiler, not functions that you'd call in normal code. You need to link against whatever C library your toolchain uses. Most of the time, it is a bad idea to link by calling ld directly. The gcc front-end program itself is designed to do this, so you should always link with "gcc -o filename object1.o object2.o" unless you know exactly what you're doing. The front-end will add all the necessary auxillery object files, library files, and linker switches which are necessary - there can be a lot of these. Finally, you appear to be using some specific toolchain from some vendor (whatever "gnude" is), and so if you can't get it working you really need to contact them. The gcc project does not have anything to do with these specific toolchain bundles, only the "vanilla" gcc - and even if it did you'd have a hard time trying to get help with an ancient version like 3.3.1. Brian
