I use
- Ubuntu 11.10
- GCC 4.5.1
I've download stable release or1ksim-0.4.0 from
http://opencores.org/openrisc,file,b3Ixa3NpbS0wLjQuMC50YXIuYnoy

then run:

tar jxf or1ksim-0.4.0.tar.bz2
cd or1ksim-0.4.0/
mkdir builddir_or1ksim
cd builddir_or1ksim
../configure --target=or32-elf --prefix=/opt/or1ksim
make all

and here is error after Making all in common:

In file included from ../../../cpu/common/abstract.c:33:0:
../../../port/port.h:41:8: error: expected identifier or «(» before «__extension__»
make[3]: *** [abstract.lo] error 1

the code in port.h

#ifndef HAVE_STRNDUP
char * strndup (const char *s, size_t n);
#endif

or1ksim0.5.0 gives the same error:

tar jxf or1ksim-0.5.0rc2.tar.bz2
mkdir builddir_or1ksim
cd builddir_or1ksim
../or1ksim-0.5.0rc2/configure --target=or32-uclinux
make check

In file included from ../../../or1ksim-0.5.0rc2/cpu/common/abstract.c:33:0:
../../../or1ksim-0.5.0rc2/port/port.h:41:8: о�ибка: expected identifier or «(» before «__extension__»
make[2]: *** [abstract.lo] ��ибка 1

Hi Juzujka

I am not sure where these instructions came from. Would you try again using

mkdir builddir_or1ksim
cd builddir_or1ksim
../or1ksim-0.5.0rc2/configure --target=or32-elf
make

If you still get errors, please retry using the latest Or1ksim from SVN.

Since you have many questions, you may find it quicker to use IRC to get your answers. Look for channel #opencores on freenode.net.

HTH

Jeremy

error again:

Making all in common
make[3]: Entering directory `/home/aska/My_Designs/DigRec3/FPGA_OpenRISC/SW/or1ksim/builddir_or1ksim-0.5.0rc2/cpu/common'
/bin/bash ../../libtool --tag=CC --mode=compile gcc -DHAVE_CONFIG_H -I. -I../../../or1ksim-0.5.0rc2/cpu/common -I../.. -I../../cpu/or32 -I../../../or1ksim-0.5.0rc2 -I../../../or1ksim-0.5.0rc2/cpu/common -I../../../or1ksim-0.5.0rc2/cpu/or1k -I../../../or1ksim-0.5.0rc2/cache -I../../../or1ksim-0.5.0rc2/mmu -I../../../or1ksim-0.5.0rc2/bpb -I../../../or1ksim-0.5.0rc2/peripheral -I../../../or1ksim-0.5.0rc2/tick -I../../../or1ksim-0.5.0rc2/peripheral/channels -I../../../or1ksim-0.5.0rc2/pm -I../../../or1ksim-0.5.0rc2/pic -I../../../or1ksim-0.5.0rc2/debug -I../../../or1ksim-0.5.0rc2/vapi -I../../../or1ksim-0.5.0rc2/support -I../../../or1ksim-0.5.0rc2/cuc -I../../../or1ksim-0.5.0rc2/port -I../../../or1ksim-0.5.0rc2/argtable2 -I../../../or1ksim-0.5.0rc2/softfloat -g -Wall -Werror -O2 -DOR32 -g -O2 -MT abstract.lo -MD -MP -MF .deps/abstract.Tpo -c -o abstract.lo ../../../or1ksim-0.5.0rc2/cpu/common/abstract.c
libtool: compile: gcc -DHAVE_CONFIG_H -I. -I../../../or1ksim-0.5.0rc2/cpu/common -I../.. -I../../cpu/or32 -I../../../or1ksim-0.5.0rc2 -I../../../or1ksim-0.5.0rc2/cpu/common -I../../../or1ksim-0.5.0rc2/cpu/or1k -I../../../or1ksim-0.5.0rc2/cache -I../../../or1ksim-0.5.0rc2/mmu -I../../../or1ksim-0.5.0rc2/bpb -I../../../or1ksim-0.5.0rc2/peripheral -I../../../or1ksim-0.5.0rc2/tick -I../../../or1ksim-0.5.0rc2/peripheral/channels -I../../../or1ksim-0.5.0rc2/pm -I../../../or1ksim-0.5.0rc2/pic -I../../../or1ksim-0.5.0rc2/debug -I../../../or1ksim-0.5.0rc2/vapi -I../../../or1ksim-0.5.0rc2/support -I../../../or1ksim-0.5.0rc2/cuc -I../../../or1ksim-0.5.0rc2/port -I../../../or1ksim-0.5.0rc2/argtable2 -I../../../or1ksim-0.5.0rc2/softfloat -g -Wall -Werror -O2 -DOR32 -g -O2 -MT abstract.lo -MD -MP -MF .deps/abstract.Tpo -c ../../../or1ksim-0.5.0rc2/cpu/common/abstract.c -fPIC -DPIC -o .libs/abstract.o
In file included from ../../../or1ksim-0.5.0rc2/cpu/common/abstract.c:33:0:
../../../or1ksim-0.5.0rc2/port/port.h:41:8: error: expected identifier or '(' before '__extension__'
make[3]: *** [abstract.lo] Error 1

svn co http://opencores.org/ocsvn/openrisc/openrisc/trunk/or1ksim
mkdir builddir_or1ksim
cd builddir_or1ksim
../or1ksim/configure --target=or32-elf
make
sudo make install

build successfully, thank you!