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Date:	Fri, 08 Mar 2002 22:05:54 +0100
From:	M_D DOT Weiss AT t-online DOT de (Michaela und Daniel =?iso-8859-1?Q?Wei=DF?=)
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To:	cygwin AT cygwin DOT com
Subject:	cannot link with libtiff
X-Sender:	510086811119-0001 AT t-dialin DOT net

Hi,

I haven't found this problem in the mailing list archive:

I have been trying to use libtiff (tiff-3.5.7-1) in my program (using
daily updated cygwin version). According to the announcement (Charles
Wilson on Feb 10th):

<BEGIN QUOTE>
Now uses the auto-import functionality of newer binutils, and
doesn't use __declspec(dllimport).  This means you no longer need
"-DTIFF_STATIC -DJPEG_STATIC -DZLIB_STATIC" or even -DALL_STATIC
when compiling objects intended for static linking. Just compile
as normal. (...) NO special flags at compile-time nor link-time when
linking to dynamic links.
<END QUOTE>

So I have tried to compile my program with the line:

gcc -Wall -O3 *.c

and get this output:

main.c: In function `main':
main.c:8: warning: unused variable `d'
main.c:25: warning: control reaches end of non-void function
/cygdrive/c/windows/TEMP/ccjdC8se.o(.text+0x31):im_tools.c: undefined
reference to `TIFFOpen'
/cygdrive/c/windows/TEMP/ccjdC8se.o(.text+0x54):im_tools.c: undefined
reference to `TIFFSetField'
/cygdrive/c/windows/TEMP/ccjdC8se.o(.text+0x72):im_tools.c: undefined
reference to `TIFFSetField'
/cygdrive/c/windows/TEMP/ccjdC8se.o(.text+0x88):im_tools.c: undefined
reference to `TIFFSetField'
/cygdrive/c/windows/TEMP/ccjdC8se.o(.text+0xa0):im_tools.c: undefined
reference to `TIFFSetField'
/cygdrive/c/windows/TEMP/ccjdC8se.o(.text+0xb6):im_tools.c: undefined
reference to `TIFFSetField'
/cygdrive/c/windows/TEMP/ccjdC8se.o(.text+0xcc):im_tools.c: more
undefined references to `TIFFSetField' follow
/cygdrive/c/windows/TEMP/ccjdC8se.o(.text+0x158):im_tools.c: undefined
reference to `TIFFWriteScanline'
/cygdrive/c/windows/TEMP/ccjdC8se.o(.text+0x16c):im_tools.c: undefined
reference to `TIFFClose'
collect2: ld returned 1 exit status

Compiling with 'gcc -Wall -O3 -ltiff *.c' gives the same result, trying
to link statically also. The auto import works for the math library,
though, I don't need to put 'gcc -lm ...'

How can I link with libtiff?

Thanks for your help,
Daniel

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