[Fwd: Re: configure handling of -lz is fishy]

[Daniel J S. <dan...@ie...>]

Hans-Bernhard Broeker wrote:

>Hi, everybody,
>
>as I already discovered when I built the DJGPP binary package, and some
>users have begun discovering on other Unix platforms, the way our
>configure script handles -lz is broken in several interesting ways.
>
>Here's a crucial snippet from config.log (wrapped around manually)
>on a Linux box:
>
>configure:10544: checking for gdImagePng in -lgd
>configure:10574: gcc -o conftest -g -O2   -I/usr/X11R6/include  \
>   conftest.c -lgd  -lm   -ljpeg -lfreetype -lpng >&5
>[...]
>configure:10606: result: yes
>
>Note the absence of -lz in that test link.  It works nevertheless, but
>only because Linux has internal dependency tracking for shared libraries,
>so -lpng can instruct the linker to pull in -lz.
>

Is there some way of deactivating this dependency/autolink feature? 
 That might prevent similar future unforeseen problems.

Dan





-- 

Dan Sebald
email: daniel DOT sebald AT ieee DOT org
URL: http://acer-access DOT com/~dsebald AT acer-access DOT com/