Re: Ubuntu 16.04 cannot compile commit c4687d920db081f29e93cca8156793d545a827e2

[Uwe Brauer <oub@mat.ucm.es>]

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>>> "PE" == Paul Eggert <eggert@cs.ucla.edu> 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"

I obtain

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

-I/usr/include/libpng16


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

-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.

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.

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


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


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