hello_world makefile

Altera_Forum · ‎08-18-2005

Hi people

I have made the standard hello world as a test app for my custom board.

Makefile

include Rules.mak
ECLIPSE_WORKSPACE := /cygdrive/c/altera/kits/nios2/bin/eclipse/workspace
KERNEL_PROJECT := hello_world
BUILDDIR := $(ECLIPSE_WORKSPACE)/$(KERNEL_PROJECT)/build/include
CFLAGS += -O0 -g -I$(BUILDDIR)
all: hello.exe hello.gdb

Rules.mak is the standard file and has not been modified.

When I try to compile the code shown here below the error below the code is shown.

Code: hello.cpp

#include "stdio.h"
int main(int argc, char *argv)
{
  printf("Hello world test app!!!\n");
  return 1;
}

console : compiler/linker

make -k all 
  no emulation specific options.
nios2-elf-gcc -nostdinc -D__linux__ -O2 -I"c:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0"/include -I/cygdrive/c/altera/kits/nios2/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1//include -fno-optimize-sibling-calls -mhw-mul -mhw-mulx -O0 -g -I/cygdrive/c/altera/kits/nios2/bin/eclipse/workspace/hello_world/build/include -Wall -o hello.o hello.cpp
nios2-elf-gcc -r -d -L"c:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0"/lib -o hello.bin hello.o /cygdrive/c/altera/kits/nios2/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../nios2-elf/lib/libm.a /cygdrive/c/altera/kits/nios2/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/libgcc.a "c:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0"/lib/libc.a
hello.o(.text+0x0): In function `_start&#39;:
: multiple definition of `_start&#39;
/cygdrive/c/altera/kits/nios2/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../nios2-elf/lib/crt0.o(.text+0x0): first defined here
collect2: ld returned 1 exit status
make: ***  Error 1
make: Target `all&#39; not remade because of errors.

Hope some of you can tell me what I am missing here.

thx upfront.

Regards

Michael E

Altera_Forum · ‎08-18-2005

Hi

Just an update

1) have changed my makefile to the one shown below

# #  configurable options#   - set DEBUG = 1 to turn on debugging support# 
DEBUG = 1
PROJ_NAME = hello
INSTALL_DIR = 
PROGS := $(PROJ_NAME).exe
CFLAGS +=
# #  You should not need to modify anything beyond this point# # TOPDIR = ..
include Rules.mak
ifeq &#39;$(DEBUG)&#39; &#39;1&#39;
    PROGS += $(PROGS:.exe=.gdb)
endif
all: $(PROGS)
.PHONY: clean
clean:
    -rm -f *. *.elf *.gdb *.bin *.exe
.PHONY: install
install: all
ifeq "$(INSTALL_DIR)" ""
    $(error No installation directory specified)
endif
    mkdir -p $(INSTALL_DIR)/bin
    install -v $(filter %.exe, $(PROGS)) $(INSTALL_DIR)/bin

2) I have compiled a custom uClibc library ( used the guide for this )

3) Have tried overwriting the lib folder with the new files created by my custom compilation.

c:\altera\kits\nios2\bin\eclipse\plugins\com.microtronix.nios2linux.uClibc_1.4.0\lib

has been replaced by the files from

C:\altera\kits\nios2\examples\software\linux\ECTKernel\lib

Still I get the console output

<div class='quotetop'>QUOTE </div>

--- Quote Start ---

make -k all

no emulation specific options.

nios2-elf-gcc -nostdinc -D__linux__ -O0 -g -I"c:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0"/include -I/cygdrive/c/altera/kits/nios2/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1//include -fno-optimize-sibling-calls -mhw-mul -mhw-mulx -Wall -o hello.o hello.cpp

nios2-elf-gcc -msys-crt0="c:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0"/lib/crt0.o -r -d -L"c:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0"/lib -o hello.bin hello.o /cygdrive/c/altera/kits/nios2/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../nios2-elf/lib/libm.a /cygdrive/c/altera/kits/nios2/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/libgcc.a "c:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0"/lib/libc.a

hello.o(.text+0x0): In function `_start':

: multiple definition of `_start'

c:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0/lib/crt0.o(.text+0x0): first defined here

collect2: ld returned 1 exit status

make: *** [hello.bin] Error 1

make: Target `all' not remade because of errors.

rm hello.o[/b]

--- Quote End ---

sugestions???

Regards

Michael E

Altera_Forum · ‎08-18-2005

Why not hello.c instead of hello.cpp?

I test when *.c change to *.cpp, the same error occurs. So in my opinion, if you insist to *.cpp you should add some proper FLAG to tell compiler to compile *.cpp.

Altera_Forum · ‎08-18-2005

Hi mountain

Thx dude.

That was it. Changed to .c now it compiles http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/ohmy.gif )

Regards

Michael E