simple question regarding hello.c world and Redboot
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Hello,I'm having difficulty in getting a simple application like hello.c to run with Redboot on the pc. When I run hello from GDB I don't see any printfs on the screen. I'm stumped as to my mistake.
My simple question is should I compile my hello.c application against the Redboot build tree or the generic pc build tree? I assume
that I should be building it against the generic pc tree. When I try to build the hello.c app against the redboot tree it fails because printf function isn't in the library. hello.c:6: warning: implicit declaration of function 'printf'hello.c:6: warning: incompatible implicit declaration of built-in function 'printf' i386-elf-gcc -L/home/users/stephen/ecos/redboot_i82559/install/lib -nostartfiles -Wl,--gc-sections -Wl,--Map -Wl,hello.map -o hello hello.o -Ttarget.ld -nostdlib /home/users/stephen/ecos/redboot_i82559/install/lib/libtarget.a(redboot_main.o): In function `cyg_start': /opt/ecos/ecos/packages/redboot/current/src/main.c:264: undefined reference to `RedBoot_version'
collect2: ld returned 1 exit status Therefore, I've been building hello.c with the pc_i82559 tree. Everything compiles just fine, except I don't see any printfs on the screen. ecosconfig new pc_i82559 ecosconfig check ecosconfig tree make cd app makei386-elf-gcc -c -o hello.o -g -I/home/users/stephen/ecos/pc_i82559/install/include -Wall -ffunction-sections -fdata-sections hello.c i386-elf-gcc -L/home/users/stephen/ecos/pc_i82559/install/lib -nostartfiles -Wl,--gc-sections -Wl,--Map -Wl,hello.map -o hello hello.o -Ttarget.ld -nostdlib
gdb hello (gdb) target remote 10.40.200.22:9000 Remote debugging using 10.40.200.22:9000 0x00114398 in ?? () (gdb) load hello Loading section .text, size 0x8cf6 lma 0x208000 Loading section .rodata, size 0x8e8 lma 0x210cf8 Loading section .data, size 0x240 lma 0x2115e0 Start address 0x208000, load size 38942 Transfer rate: 381784 bits/sec, 499 bytes/write. (gdb) continue Continuing.I realize that the default pc_i82559 build disables rom monitor support and I've been fiddling with different settings but I haven't got it figured out.
Could someone share the obvious configuration for enabling Redboot gdb support to a basic hello.c app for the pc_i82559 build? I'm shocked that I can't figure this one out.
Thanks for your help, Stephen -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss