Re: gEDA: Problems compiling gerbv: -lz, -lm

[Stefan Petersen <spe@stacken.kth.se>]

On Sat, 21 Aug 2004, Hamish Moffatt wrote:

> On Fri, Aug 20, 2004 at 08:23:45AM +0000, Karel Kulhavý wrote:
> > I got numerous problems with missing -lz, -lm in addition to -lpng during compilation
> > of gerbv-0.16
>
> > configure:3716: gcc -o conftest -O2 -march=athlon-xp -fomit-frame-pointer -fstrength-reduce -fschedule-insns -I/home/clock/usr/include   conftest.c -lpng   >&5
> > /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.2.3/../../../libpng.so: undefined reference to `deflate'
>
> That means your libpng is built wrong. It should link against libz
> itself if it needs it, rather then depending on user applications to
> provide that link.

Hamish is right. On my machine I get from "ldd /usr/lib/libpng.so"
        libz.so.1 => /usr/lib/libz.so.1 (0x40032000)
        libm.so.6 => /lib/libm.so.6 (0x40043000)
        libc.so.6 => /lib/libc.so.6 (0x40065000)
        /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x80000000)



> You only changed configure. You would need to change the makefiles also.

Do the changes in configure.in. Then rerun aclocal, autoheader, autconf,
automake --copy --add-missing (in that order). Then rerun ./configure et
al.

-OR-

you could run
	./configure --disable-exportpng

if you don't need png export functionality.


> > I think the ./configure and make mechanism of gerbv must be broken somehow.
>
> No, your libpng is broken.

I agree with Hamish.

Regards,
/Stefan