> Looking at compiling xawtv for the first time in quite a while (3.21 was
> the last), and noticed the following in config.log:
>
> configure:2407: checking for png_read_info in -lpng
> configure:2426: gcc -o conftest -g -O2 conftest.c -lpng 1>&5
> /usr/lib/libpng.so: undefined reference to `deflate'
> /usr/lib/libpng.so: undefined reference to `inflate'
...
> So, looks like two issues exist here:
>
> First, a check for -lz and using that with -lpng seems prudent.
I disagree, if libpng depends on libz it should have a DT_NEEDED entry
in it. And for me, it does:
% ldd /usr/lib/libpng.so.2.1.0.5
libz.so.1 => /usr/lib/libz.so.1 (0x4002b000)
libm.so.6 => /lib/libm.so.6 (0x4003b000)
libc.so.6 => /lib/libc.so.6 (0x40058000)
/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x80000000)
> Second, if the user supplies LIBS=, they should be honored in the Makefile,
> correct?
Hmm, I don't know whether there is a standard for this, it could be
EXTRA_LIBS or X11_EXTRA_LIBS too..
Regards,
Wolfram.
