Hello, Please forgive me if my post is in an incorrect place. This seems to be the most appropriate place for it since it is about gcc. I have followed the instructions here: http://johannes-bauer.com/mcus/cortex/ Basically, I have setup the gcc cross compiler in Ubuntu 10.10 for the Cortex-M3 compiler. I've also added GDB and eclipse. Compilation of a simple hello world program works just fine, but when I need to compile more advanced programs that use malloc and other features that are part of newlib fails. Newlib was compiled as: newlib-1.18.0/configure --target=${BLD_TARGET} --prefix=${BLD_PREFIX} --disable-multilib --disable-newlib-supplied-syscalls --disable-interwork therefore, my understanding is I have to supply my own newlib. When I am compiling and linking I get the following errors: /home/ops/bin/arm-elf/lib/gcc/arm-elf/4.4.3/../../../../arm-elf/lib/libc.a(lib_a-sbrkr.o): In function `_sbrk_r': /home/ops/Desktop/arm-toolchain/newlib/arm-elf/newlib/libc/reent/../../../../newlib-1.18.0/newlib/libc/reent/sbrkr.c:60: undefined reference to `_sbrk' /home/ops/bin/arm-elf/lib/gcc/arm-elf/4.4.3/../../../../arm-elf/lib/libc.a(lib_a-writer.o): In function `_write_r': /home/ops/Desktop/arm-toolchain/newlib/arm-elf/newlib/libc/reent/../../../../newlib-1.18.0/newlib/libc/reent/writer.c:58: undefined reference to `_write' /home/ops/bin/arm-elf/lib/gcc/arm-elf/4.4.3/../../../../arm-elf/lib/libc.a(lib_a-closer.o): In function `_close_r': /home/ops/Desktop/arm-toolchain/newlib/arm-elf/newlib/libc/reent/../../../../newlib-1.18.0/newlib/libc/reent/closer.c:53: undefined reference to `_close' /home/ops/bin/arm-elf/lib/gcc/arm-elf/4.4.3/../../../../arm-elf/lib/libc.a(lib_a-lseekr.o): In function `_lseek_r': /home/ops/Desktop/arm-toolchain/newlib/arm-elf/newlib/libc/reent/../../../../newlib-1.18.0/newlib/libc/reent/lseekr.c:58: undefined reference to `_lseek' /home/ops/bin/arm-elf/lib/gcc/arm-elf/4.4.3/../../../../arm-elf/lib/libc.a(lib_a-readr.o): In function `_read_r': /home/ops/Desktop/arm-toolchain/newlib/arm-elf/newlib/libc/reent/../../../../newlib-1.18.0/newlib/libc/reent/readr.c:58: undefined reference to `_read' /home/ops/bin/arm-elf/lib/gcc/arm-elf/4.4.3/../../../../arm-elf/lib/libc.a(lib_a-fstatr.o): In function `_fstat_r': /home/ops/Desktop/arm-toolchain/newlib/arm-elf/newlib/libc/reent/../../../../newlib-1.18.0/newlib/libc/reent/fstatr.c:62: undefined reference to `_fstat' /home/ops/bin/arm-elf/lib/gcc/arm-elf/4.4.3/../../../../arm-elf/lib/libc.a(lib_a-isattyr.o): In function `_isatty_r': /home/ops/Desktop/arm-toolchain/newlib/arm-elf/newlib/libc/reent/../../../../newlib-1.18.0/newlib/libc/reent/isattyr.c:58: undefined reference to `_isatty' How would I got about resolving this? Should I change the newlib configuration before I compile and recompile? I know that I need to add stubs and I've tried adding them from the codesourcery g++ lite library. However, it gave me many errors about the use of asm: syscalls.c:81: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'asm' The syscalls I use is similar or the same as the one in: http://newlib.sourcearchive.com/documentation/1.14.0-1/libgloss_2arm_2syscalls_8c-source.html I'd be appreciative of any help. Being my first time really compiling gcc from scratch, I would hope I can make good use of it. -- View this message in context: http://old.nabble.com/GCC-linking-and-compiling-error-for-Cortex-M3-Microcontroller-because-of-Newlib-tp30625742p30625742.html Sent from the gcc - Help mailing list archive at Nabble.com.
