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Message-ID: <417D1416.4020909@x-ray.at>
Date: Mon, 25 Oct 2004 16:56:22 +0200
From: Reini Urban <rurban AT x-ray DOT at>
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To: cygwin AT cygwin DOT com
CC: Peter Ekberg <peda AT axentia DOT se>
Subject: Re: Avail for test: libtool-devel-1.9f_20041024-1, libltdl6-1.9f_20041024-1
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Peter Ekberg schrieb:
> I have one problem with libtool 1.9d, that I suspect is still present
> in 1.9f. If I specify -lpthread when linking, libtool searches for a
> real file matching -lpthread, like this:
> 
> *** Warning: linker path does not have real file for library -lpthread.
> *** I have the capability to make that library automatically link in
> when
> *** you link to this library.  But I can only do this if you have a
> *** shared version of the library, which you do not appear to have
> *** because I did check the linker path looking for a file starting
> *** with libpthread and none of the candidates passed a file format test
> *** using a file magic. Last file checked: /lib/libpthread.a

Then you have a binutils problem. The new magic for /lib/libpthread.a 
tells libtool that this is the import library. (which normally would be 
called libpthread.dll.a)

$ file -L /lib/libpthread.a
/lib/libpthread.a: current ar archive

# ok, this failed.

$ objdump -f /lib/libpthread.a | sed 10q

#this will detect together with nm that it is an import lib

func_win32_libid () {
   win32_libid_type="unknown"
   win32_fileres=`file -L $1 2>/dev/null`
   case $win32_fileres in
   *ar\ archive\ import\ library*) # definitely import
     win32_libid_type="x86 archive import"
     ;;
   *ar\ archive*) # could be an import, or static
     if eval $OBJDUMP -f $1 | $SED -e '10q' 2>/dev/null | \
       $EGREP -e 'file format pe-i386(.*architecture: i386)?' >/dev/null 
; then
       win32_nmres=`eval $NM -f posix -A $1 | \
	sed -n -e '1,100{/ I /{x;/import/!{s/^/import/;h;p;};x;};}'`
       if test "X$win32_nmres" = "Ximport" ; then
         win32_libid_type="x86 archive import"
       else
         win32_libid_type="x86 archive static"
       fi
     fi
     ;;

....

> Because of this, libtool fails to build the dll in question, which is a
> pity.

-- 
Reini Urban
http://xarch.tu-graz.ac.at/home/rurban/

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