[Buildroot] libtiff compilation fails when libjpeg62-dev is present on host

[Baruch Siach <baruch@tkos.co.il>]

Hi Buildroot list,

I need to compile libtiff as a dependency of ImageMagic on a recent Debian 
Squeeze host.  The strange this is that when the libjpeg62-dev is installed on 
the host libtools finds the host /usr/lib/libjpeg.la file during build, which makes 
the build to fail at link time as follows:

libtool: link: /opt/arm-2009q1/bin/arm-none-linux-gnueabi-gcc -Os -pipe -Os  --sysroot /home/baruch/git/buildroot/build_arm/staging_dir/ -shared  .libs/tif_aux.o .libs/tif_close.o .libs/tif_codec.o .libs/tif_color.o .libs/tif_compress.o .libs/tif_dir.o .libs/tif_dirinfo.o .libs/tif_dirread.o .libs/tif_dirwrite.o .libs/tif_dumpmode.o .libs/tif_error.o .libs/tif_extension.o .libs/tif_fax3.o .libs/tif_fax3sm.o .libs/tif_flush.o .libs/tif_getimage.o .libs/tif_jpeg.o .libs/tif_luv.o .libs/tif_lzw.o .libs/tif_next.o .libs/tif_ojpeg.o .libs/tif_open.o .libs/tif_packbits.o .libs/tif_pixarlog.o .libs/tif_predict.o .libs/tif_print.o .libs/tif_read.o .libs/tif_strip.o .libs/tif_swab.o .libs/tif_thunder.o .libs/tif_tile.o .libs/tif_unix.o .libs/tif_version.o .libs/tif_warning.o .libs/tif_write.o .libs/tif_zip.o  -Wl,--whole-archive ../port/.libs/libport.a -Wl,--no-whole-archive  /usr/lib/libjpeg.so -lz -lm -lc      -Wl,-soname -Wl,libtiff.so.3 -o .libs/libtiff.so.3.8.2
/usr/lib/libjpeg.so: file not recognized: File format not recognized
collect2: ld returned 1 exit status

Removing libjpeg62-dev, or even renaming the host /usr/lib/libjpeg.la file 
makes the problem go away. Is there a sane solutions for this?

baruch

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