Re: Ubuntu font of wisdom

[Dan Espen <despen@verizon.net>]

"James K. Lowden" <jklowden@speakeasy.net> writes:

> On Fri, 16 Dec 2016 21:41:18 +0000 (UTC)
> Javier <nospam@nospam.invalid> wrote:
>
>> > While I'm at it, the new version uses the ugly Motif-gray toolbar,
>> > while the packaged version uses a much more attractive, colorful
>> > toolbar (and puts the scrollabar on the right).  
>> 
>> It looks you are using different toolkits on 24 and 25 versions.
>> Look at the output of M-x display-about-screen
>
> Thank you.  Yes: 
>
> GNU Emacs 24.5.1 (x86_64-pc-linux-gnu, GTK+ Version 3.18.9)
> GNU Emacs 25.1.1 (x86_64-unknown-linux-gnu, X toolkit, Xaw3d scroll
> bars)
>
>> The available toolkits can be seen in the source code
>> from ./configure --help:
>
> Yes, I read INSTALL more carefully today, and surmised I want GTK+.  
> Do you think if I successfully build with GTK+ that my fonts will
> magically Just Work?  That would be nice.  
>
> At the risk of going off-topic, I believe I've found the root of the
> trouble, and it appears to be a bug in the configure script.  
>
> When I practiced on a virtual machine (same Ubuntu, but
> installed more recently) I got  a lovely GTK+ 25.1 build, with
> no hiccups. Following the same instructions on my somewhat cruftier dev
> box, I encountered problems: configure complained it can't find libpng.
>
> Tedious inspection of the two configure.log files reveals the
> difference: configure is attempting to use libpng16, despite it being
> in an odd place.  
>
>     gcc  -o  conftest \
>     -g3 \
>     -O2 \
>     -pthread \
>     -I/usr/include/librsvg-2.0 \
>     -I/usr/include/gdk-pixbuf-2.0 \
>     -I/usr/include/libpng12 \
>     -I/usr/include/cairo \
>     -I/usr/include/glib-2.0 \
>     -I/usr/lib/x86_64-linux-gnu/glib-2.0/include \
>     -I/usr/include/pixman-1 \
>     -I/usr/include/freetype2 \
>     -I/usr/include/libpng12 \
>     -I/usr/local/anaconda/include/libpng16 \  <-- hello!  
>     conftest.c \
>     -lpng16 \
>     -lz \
>     -lm \
>     -lX11 
>     
> Apparently, configure traverses /usr/local for include files but not
> libraries.  Anaconda (the Python package manager)
> uses /usr/loca/anaconda/{include,lib}.  configure's test fails because
> libpng16 is not on the default library search path: 
>
> 	$ find /usr/local/ -name '*png16*so'
> 	/usr/local/anaconda/lib/libpng16.so
>
> I don't see any way to exclude a directory from configure's search
> path.  I'm grateful for the many years between today and the last time
> I was responsible for a configure.ac.  I can report configure is
> broken: it should either not use anaconda's tree, or it should use both
> forks.  
>
> What I will do for the nonce is rename the directory
> to /usr/local/..anaconda, or move it out of the way, and see if
> configure can find its way.  
>
> Other suggestions?  

On Fedora, I get libpng16 out of /usr/include and /usr/lib64.
I think you need to install a devel package like
libpng-devel.


-- 
Dan Espen