Re: Ubuntu 16.04 cannot compile commit c4687d920db081f29e93cca8156793d545a827e2

[Robert Pluim]

>>>>> On Fri, 24 Jan 2020 09:52:55 +0100, Uwe Brauer <address@hidden> said:

    >>>> "PE" == Paul Eggert <address@hidden> writes:
    >> On 1/23/20 12:09 PM, Uwe Brauer wrote:
    >>> So png12 is missing, why did compile me tell about it?

    >> I guess your pkg-config claimed that you have a working libpng, even
    >> though you don't. Try running the following shell commands:

    >> pkg-config --cflags "libpng >= 1.0.0"
    >> pkg-config --libs "libpng >= 1.0.0"

    Uwe> I obtain

    Uwe> pkg-config --cflags "libpng >= 1.0.0"

    Uwe> -I/usr/include/libpng16


    Uwe> pkg-config --libs "libpng >= 1.0.0"

    Uwe> -lpng16 -lz

    >> If these commands tell 'configure' to use flags like -lpng12 but those
    >> flags don't work, then you have a problem with your pkg-config
    >> installation somewhere.

    Uwe> Well it seems that they should say lpng16 and the don't 

    >> Although you can work around the problem by building Emacs with
    >> './configure --without-png', it's better to get your png installation
    >> whipped into shape.

    Uwe> --without-png is not a solution for me.


    Uwe> Any why on earth could I compile still on 23 of December? What 
changed, 
    Uwe> shall I bisect the problem?

Did you install a newer package for png and not re-run configure?

Robert