configure problems

[Jan Stary]

Hi,

this is what I get with the current CVS (viz later).

I know that I don't have libpng, libjpeg etc installed
(by mistake, I was compiling on machine without them),
but I mean the 'usability ... yes ; presence ... no' problem.
Is this an autoconf bug, or is configure.in written badly ?

The system is:

        Debian unstable
        kernel 2.4.19 (self compiled)
        autoconf 2.57
        automake 1.6.3
        gcc/cpp 3.2.2


The results follow.

                Jan


cvs co dillo && cd dillo
./autogen.sh
./configure --prefix=$HOME
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking for gcc... gcc
checking for C compiler default output... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... 
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ANSI C... none needed
checking for style of include used by make... GNU
checking dependency style of gcc... gcc3
checking for gcc option to accept ANSI C... none needed
checking for ranlib... ranlib
checking for gtk-config... /usr/bin/gtk-config
checking for GTK - version >= 1.2.0... yes
checking for jpeg_destroy_decompress in -ljpeg... no
configure: WARNING: *** JPEG support will not be included ***
checking for pthread_create in -lpthread... yes
checking for zlibVersion in -lz... no
checking for png_check_sig in -lpng... no
checking for ANSI C header files... no
checking fcntl.h usability... yes
checking fcntl.h presence... no
configure: WARNING: fcntl.h: accepted by the compiler, rejected by the 
preprocessor!
configure: WARNING: fcntl.h: proceeding with the preprocessor's result
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to address@hidden ##
configure: WARNING:     ## ------------------------------------ ##
checking for fcntl.h... no
checking unistd.h usability... yes
checking unistd.h presence... no
configure: WARNING: unistd.h: accepted by the compiler, rejected by the 
preprocessor!
configure: WARNING: unistd.h: proceeding with the preprocessor's result
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to address@hidden ##
configure: WARNING:     ## ------------------------------------ ##
checking for unistd.h... no
checking sys/uio.h usability... yes
checking sys/uio.h presence... no
configure: WARNING: sys/uio.h: accepted by the compiler, rejected by the 
preprocessor!
configure: WARNING: sys/uio.h: proceeding with the preprocessor's result
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to address@hidden ##
configure: WARNING:     ## ------------------------------------ ##
checking for sys/uio.h... no
checking for socket... yes
configure: creating ./config.status
config.status: creating Makefile
config.status: creating doc/Makefile
config.status: creating src/Makefile
config.status: creating src/IO/Makefile
config.status: creating config.h
config.status: executing depfiles commands