libc.a error ?

Sorry, I know this is a double post but I think it deserves a new topic.

Hi guys I’ve been trying to compile the jpeg source code (www.ijg.org) for the NIOS II Linux Distro, but I’ve caught a snag. It seems that the libc.a that I have gives a compiler error. I am completely new to this cross-compiling thing so maybe I’m doing something wrong, or just missing something. But the source compiles flawlessly with gcc under cygwin.

Here is the ./configure output

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

--- Quote Start ---

checking for gcc... gcc

checking whether the C compiler (gcc ) works... yes

checking whether the C compiler (gcc ) is a cross-compiler... no

checking whether we are using GNU C... egrep: not found

no

checking how to run the C preprocessor... gcc -E

checking for function prototypes... yes

checking for stddef.h... yes

checking for stdlib.h... yes

checking for string.h... yes

checking for size_t... yes

checking for type unsigned char... yes

checking for type unsigned short... yes

checking for type void... yes

checking for working const... yes

checking for inline... __inline__

checking for broken incomplete types... ok

checking for short external names... ok

checking to see if char is signed... yes

checking to see if right shift is signed... yes

checking to see if fopen accepts b spec... yes

checking for a BSD compatible install... /bin/install -c

checking for ranlib... ranlib

checking libjpeg version number... 62

creating ./config.status

creating Makefile

creating jconfig.h

jconfig.h is unchanged[/b]

--- Quote End ---

Then I edit the Makefile and change the CC option from gcc to nios2-elf-gcc.

Next I run nios2-elf-make. The output is long but I include it for completeness sake:

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

--- Quote Start ---

nios2-elf-gcc -O -I. -c -o jcapistd.o jcapistd.c

nios2-elf-gcc -O -I. -c -o jctrans.o jctrans.c

nios2-elf-gcc -O -I. -c -o jcparam.o jcparam.c

nios2-elf-gcc -O -I. -c -o jdatadst.o jdatadst.c

nios2-elf-gcc -O -I. -c -o jcinit.o jcinit.c

nios2-elf-gcc -O -I. -c -o jcmaster.o jcmaster.c

nios2-elf-gcc -O -I. -c -o jcmarker.o jcmarker.c

nios2-elf-gcc -O -I. -c -o jcmainct.o jcmainct.c

nios2-elf-gcc -O -I. -c -o jcprepct.o jcprepct.c

nios2-elf-gcc -O -I. -c -o jccoefct.o jccoefct.c

nios2-elf-gcc -O -I. -c -o jccolor.o jccolor.c

nios2-elf-gcc -O -I. -c -o jcsample.o jcsample.c

nios2-elf-gcc -O -I. -c -o jchuff.o jchuff.c

nios2-elf-gcc -O -I. -c -o jcphuff.o jcphuff.c

nios2-elf-gcc -O -I. -c -o jcdctmgr.o jcdctmgr.c

nios2-elf-gcc -O -I. -c -o jfdctfst.o jfdctfst.c

nios2-elf-gcc -O -I. -c -o jfdctflt.o jfdctflt.c

nios2-elf-gcc -O -I. -c -o jfdctint.o jfdctint.c

nios2-elf-gcc -O -I. -c -o jdapimin.o jdapimin.c

nios2-elf-gcc -O -I. -c -o jdapistd.o jdapistd.c

nios2-elf-gcc -O -I. -c -o jdtrans.o jdtrans.c

nios2-elf-gcc -O -I. -c -o jdatasrc.o jdatasrc.c

nios2-elf-gcc -O -I. -c -o jdmaster.o jdmaster.c

nios2-elf-gcc -O -I. -c -o jdinput.o jdinput.c

nios2-elf-gcc -O -I. -c -o jdmarker.o jdmarker.c

nios2-elf-gcc -O -I. -c -o jdhuff.o jdhuff.c

nios2-elf-gcc -O -I. -c -o jdphuff.o jdphuff.c

nios2-elf-gcc -O -I. -c -o jdmainct.o jdmainct.c

nios2-elf-gcc -O -I. -c -o jdcoefct.o jdcoefct.c

nios2-elf-gcc -O -I. -c -o jdpostct.o jdpostct.c

nios2-elf-gcc -O -I. -c -o jddctmgr.o jddctmgr.c

nios2-elf-gcc -O -I. -c -o jidctfst.o jidctfst.c

nios2-elf-gcc -O -I. -c -o jidctflt.o jidctflt.c

nios2-elf-gcc -O -I. -c -o jidctint.o jidctint.c

nios2-elf-gcc -O -I. -c -o jidctred.o jidctred.c

nios2-elf-gcc -O -I. -c -o jdsample.o jdsample.c

nios2-elf-gcc -O -I. -c -o jdcolor.o jdcolor.c

nios2-elf-gcc -O -I. -c -o jquant1.o jquant1.c

nios2-elf-gcc -O -I. -c -o jquant2.o jquant2.c

nios2-elf-gcc -O -I. -c -o jdmerge.o jdmerge.c

nios2-elf-gcc -O -I. -c -o jcomapi.o jcomapi.c

nios2-elf-gcc -O -I. -c -o jutils.o jutils.c

nios2-elf-gcc -O -I. -c -o jerror.o jerror.c

nios2-elf-gcc -O -I. -c -o jmemmgr.o jmemmgr.c

nios2-elf-gcc -O -I. -c -o jmemnobs.o jmemnobs.c

rm -f libjpeg.a

ar rc libjpeg.a jcapimin.o jcapistd.o jctrans.o jcparam.o jdatadst.o jcinit.o j

cmaster.o jcmarker.o jcmainct.o jcprepct.o jccoefct.o jccolor.o jcsample.o jchuf

f.o jcphuff.o jcdctmgr.o jfdctfst.o jfdctflt.o jfdctint.o jdapimin.o jdapistd.o

jdtrans.o jdatasrc.o jdmaster.o jdinput.o jdmarker.o jdhuff.o jdphuff.o jdmainct

.o jdcoefct.o jdpostct.o jddctmgr.o jidctfst.o jidctflt.o jidctint.o jidctred.o

jdsample.o jdcolor.o jquant1.o jquant2.o jdmerge.o jcomapi.o jutils.o jerror.o j

memmgr.o jmemnobs.o

ranlib libjpeg.a

nios2-elf-gcc -O -I. -c -o cjpeg.o cjpeg.c

nios2-elf-gcc -O -I. -c -o rdppm.o rdppm.c

nios2-elf-gcc -O -I. -c -o rdgif.o rdgif.c

nios2-elf-gcc -O -I. -c -o rdtarga.o rdtarga.c

nios2-elf-gcc -O -I. -c -o rdrle.o rdrle.c

nios2-elf-gcc -O -I. -c -o rdbmp.o rdbmp.c

nios2-elf-gcc -O -I. -c -o rdswitch.o rdswitch.c

nios2-elf-gcc -O -I. -c -o cdjpeg.o cdjpeg.c

nios2-elf-gcc -o cjpeg cjpeg.o rdppm.o rdgif.o rdtarga.o rdrle.o rdbmp.o rdswit

ch.o cdjpeg.o libjpeg.a

/cygdrive/c/altera/kits/nios2/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc

-lib/nios2-elf/3.3.3/../../../../nios2-elf/lib/libc.a(closer.o): In function `_c

lose_r&#39;:

closer.o(.text+0x20): warning: _close is not implemented and will always fail

/cygdrive/c/altera/kits/nios2/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc

-lib/nios2-elf/3.3.3/../../../../nios2-elf/lib/libc.a(fstatr.o): In function `_f

stat_r&#39;:

fstatr.o(.text+0x28): warning: _fstat is not implemented and will always fail

/cygdrive/c/altera/kits/nios2/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc

-lib/nios2-elf/3.3.3/../../../../nios2-elf/lib/libc.a(makebuf.o): In function `_

_smakebuf&#39;:

makebuf.o(.text+0xf8): warning: isatty is not implemented and will always fail

/cygdrive/c/altera/kits/nios2/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc

-lib/nios2-elf/3.3.3/../../../../nios2-elf/lib/libc.a(lseekr.o): In function `_l

seek_r&#39;:

lseekr.o(.text+0x2c): warning: _lseek is not implemented and will always fail

/cygdrive/c/altera/kits/nios2/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc

-lib/nios2-elf/3.3.3/../../../../nios2-elf/lib/libc.a(openr.o): In function `_op

en_r&#39;:

openr.o(.text+0x2c): warning: _open is not implemented and will always fail

/cygdrive/c/altera/kits/nios2/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc

-lib/nios2-elf/3.3.3/../../../../nios2-elf/lib/libc.a(readr.o): In function `_re

ad_r&#39;:

readr.o(.text+0x2c): warning: _read is not implemented and will always fail

/cygdrive/c/altera/kits/nios2/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc

-lib/nios2-elf/3.3.3/../../../../nios2-elf/lib/libc.a(writer.o): In function `_w

rite_r&#39;:

writer.o(.text+0x2c): warning: _write is not implemented and will always fail

/cygdrive/c/altera/kits/nios2/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc

-lib/nios2-elf/3.3.3/../../../../nios2-elf/lib/libc.a(getenv_r.o): In function `

_findenv_r&#39;:

getenv_r.o(.text+0x34): undefined reference to `__env_lock&#39;

getenv_r.o(.text+0xb8): undefined reference to `__env_unlock&#39;

getenv_r.o(.text+0x100): undefined reference to `__env_unlock&#39;

collect2: ld returned 1 exit status

nios2-elf-make: *** [cjpeg] Error 1[/b]

--- Quote End ---

How do I regenerate libc.a? Is that even where the problem is? Is there another way to compile the jpeg source for the NIOS II Linux distro?

MORE INFO:

JPEG source version : 6b

gcc version: 2.95.3-5 (cygwin special)

nios2-elf-gcc version: 3.3.3 (Altera Nios II 1.0 b316)