present but cannot be compiled (Was: configure problems)

[Akim Demaille]

| Hi,
| is is what I get with the current CVS (viz later).
| 
| know that I don't have libpng, libjpeg etc installed
| y mistake, I was compiling on machine without them),
| t I mean the 'usability ... yes ; presence ... no' problem.
|  this an autoconf bug, or is configure.in written badly ?
| 
| e system is:
| 
|       Debian unstable
|       kernel 2.4.19 (self compiled)
|       autoconf 2.57
|       automake 1.6.3
|       gcc/cpp 3.2.2
| 
| 
| e results follow.
| 
|               Jan
| 
| 
| s co dillo && cd dillo
| autogen.sh
| configure --prefix=$HOME
| ecking for a BSD-compatible install... /usr/bin/install -c
| ecking whether build environment is sane... yes
| ecking for gawk... gawk
| ecking whether make sets $(MAKE)... yes
| ecking for gcc... gcc
| ecking for C compiler default output... a.out
| ecking whether the C compiler works... yes
| ecking whether we are cross compiling... no
| ecking for suffix of executables... 
| ecking for suffix of object files... o
| ecking whether we are using the GNU C compiler... yes
| ecking whether gcc accepts -g... yes
| ecking for gcc option to accept ANSI C... none needed
| ecking for style of include used by make... GNU
| ecking dependency style of gcc... gcc3
| ecking for gcc option to accept ANSI C... none needed
| ecking for ranlib... ranlib
| ecking for gtk-config... /usr/bin/gtk-config
| ecking for GTK - version >= 1.2.0... yes
| ecking for jpeg_destroy_decompress in -ljpeg... no
| nfigure: WARNING: *** JPEG support will not be included ***
| ecking for pthread_create in -lpthread... yes
| ecking for zlibVersion in -lz... no
| ecking for png_check_sig in -lpng... no
| ecking for ANSI C header files... no
| ecking fcntl.h usability... yes
| ecking fcntl.h presence... no
| nfigure: WARNING: fcntl.h: accepted by the compiler, rejected by the 
preprocessor!
| nfigure: WARNING: fcntl.h: proceeding with the preprocessor's result
| nfigure: WARNING:     ## ------------------------------------ ##
| nfigure: WARNING:     ## Report this to address@hidden ##
| nfigure: WARNING:     ## ------------------------------------ ##
| ecking for fcntl.h... no
| ecking unistd.h usability... yes
| ecking unistd.h presence... no
| nfigure: WARNING: unistd.h: accepted by the compiler, rejected by the 
preprocessor!
| nfigure: WARNING: unistd.h: proceeding with the preprocessor's result
| nfigure: WARNING:     ## ------------------------------------ ##
| nfigure: WARNING:     ## Report this to address@hidden ##
| nfigure: WARNING:     ## ------------------------------------ ##
| ecking for unistd.h... no
| ecking sys/uio.h usability... yes
| ecking sys/uio.h presence... no
| nfigure: WARNING: sys/uio.h: accepted by the compiler, rejected by the 
preprocessor!
| nfigure: WARNING: sys/uio.h: proceeding with the preprocessor's result
| nfigure: WARNING:     ## ------------------------------------ ##
| nfigure: WARNING:     ## Report this to address@hidden ##
| nfigure: WARNING:     ## ------------------------------------ ##
| ecking for sys/uio.h... no
| ecking for socket... yes
| nfigure: creating ./config.status
| nfig.status: creating Makefile
| nfig.status: creating doc/Makefile
| nfig.status: creating src/Makefile
| nfig.status: creating src/IO/Makefile
| nfig.status: creating config.h
| nfig.status: executing depfiles commands
| 
|