[gradsusr] configure does not work for cairo outside of supplibs

[Stephen Woodbridge]

Hi Jennifer,

I'm having trouble getting configure to work when cairo is in the system 
and not supplibs. It would be great if we could focus a little effort on 
getting the build scripts to be a little more generic.

Cairo
-----
looking in ../supplibs
checking cairo.h usability... no
checking cairo.h presence... no
checking for cairo.h... no
looking in other system locations
checking for CAIRO... configure: error: in 
`/home/woodbri/work/grads/grads-2.2.1':
configure: error: The pkg-config script could not be found or is too 
old.  Make sure it
is in your PATH or set the PKG_CONFIG environment variable to the full
path to pkg-config.

Alternatively, you may set the environment variables CAIRO_CFLAGS
and CAIRO_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.

root at u19589217:/home/woodbri/work/grads/grads-2.2.1# pkg-config --version
0.29.1

root at u19589217:/home/woodbri/work/grads/grads-2.2.1# pkg-config --cflags 
cairo
-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

root at u19589217:/home/woodbri/work/grads/grads-2.2.1# pkg-config --libs cairo
-lcairo

I have also tried setting CAIRO_CFLAGS and CAIRO_LIBS as described above 
but that fails the same. Using:

#!/bin/sh

export CAIRO_CFLAGS=-I/usr/include/cairo
export CAIRO_LIBS="-L/usr/lib/x86_64-linux-gnu -lcairo"

LIB=/usr/lib/x86_64-linux-gnu
SUPPLIBS=../supplibs

./configure \
   --with-geotiff-libdir=$LIB \
   --with-hdf4-libdir=/usr/lib \
   --with-hdf5-include=/usr/include/hdf5/serial/ \
   --with-hdf5-libdir=/usr/lib/x86_64-linux-gnu/hdf5/serial/ \
   --with-netcdf-include=/usr/include \
   --with-netcdf-libdir=$LIB \

My supplibs/ only has udunits in it, everything else is coming from 
system packages.

-Steve


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