So sorry - belatedly realised that include is in angle brackets. Installed the libpng-dev and this fixes the problem. Then the only other issue is that make install needs to be run as sudo. I now have a working version of apl. Sorry to bother you and thank you so much for creating and maintaining a free version of apl.
Kind regards Steve On Fri, 14 Oct 2022 at 09:46, Steve Clay <steve.c...@gmail.com> wrote: > Hi > > I am interested in learning apl and was delighted to find your site about > GNU APL. > > I am using Ubuntu 22.04.1 (64 bit on an i3 machine). > > I didn't have subversion but installed it without any problems using apt. > I already had gcc installed. > I then downloaded the apl source code using this command: > > $ svn checkout http://svn.savannah.gnu.org/svn/apl/trunk > > This created a folder called trunk. I used 'cd trunk' to get into the > folder and, having read the readme and install files, tried to build apl > using this command: > > $ ./configure && make && make install > > The process compiled quite a lot of source files but stopped with a fatal > error while trying to compile Quad_PNG.cc. The fatal error was caused by > not having png.h. This is the third include in the .cc file. The file isn't > amongst the source files, should it be somewhere else? > > Could you advise me please on how to fix this problem? > Thank you. > Kind regards > Steve Clay > >
