I am configuring they jpeg-6b software to run on a s390 linux port.

The Makefile  file ends up with LIBTOOL = ./libtool but should be either just libtool or /usr/bin/libtool.

The following is from my ./configure and make

/usr/src/jpeg-6b$ sudo ./configure --prefix=/usr --enable-static --

enable-shared

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... yes

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... no

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

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

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

checking for ranlib... ranlib

checking host system type... Invalid configuration `s390-unknown-linux-gnu': machine `s390-unknown' not recognized

checking libjpeg version number... 62

creating ./config.status

creating Makefile

creating jconfig.h

jconfig.h is unchanged

/usr/src/jpeg-6b$ sudo make

./libtool --mode=compile gcc -O2  -I. -c ./jcapimin.c

make: ./libtool: Command not found

make: *** [jcapimin.lo] Error 127