[Freeciv-Dev] (PR#6137) Compilation (configure) problem with SDL in non-standard location

["Guest" <rt-guest@xxxxxxxxxxxxxx>]

Attempting to configure FreeCiv with SDL support in some form fails if 
SDL's include files/library files are not in the usual paths (e.g. if 
I install SDL in /opt/sdl ). However, SDL comes with a config script, 
sdl-config, which gives the relevant locations as output for GCC, i.
e.: 
 
 $ sdl-config --cflags 
-I/opt/sdl/include 
 
 $ sdl-config --libs 
-L/opt/sdl/lib -l... 
 
This issue definitely affects the configure script in CVS; however, I 
don't know the first thing about the autotools, so I'm afraid I can't 
create a patch for it. The fix should be trivial though: just add the 
flags returned by sdl-config.