wrestling with stack overflow

My first post on Stack overflow, and first use with allegro, and my first use of pkg-config.  Very sorry if the formatting is odd in the post as it was wierdly not matching up correctly.

As a preface, I have installed Allegro 5.0.5 with no error messages on Debian Linux according to
http://wiki.allegro.cc/index.php?title=Debian_and_Allegro_5

and consulted these posts
http://stackoverflow.com/questions/6377204/compiling-c-code-with-allegro-5-and-g
http://stackoverflow.com/questions/8430632/allegro-5-0-why-am-i-getting-linker-errors

My error messages using the command:
     g++ -o foo allegtest.cpp `pkg-config --cflags --libs allegro-5.0`

give the familiar:
error: allegro5\allegro.h: No such file or directory

the results of the command:
     pkg-config --libs allegro-5.0

yields:  -lallegro

the results of the command:
     pkg-config --cflags

yields an empty line and returns the prompt (research suggests it is supposed to give the path to the allegro headers?)  ... which are located in /usr/include/allegro5 as expected

the contents of the allegro-5.0.pc  (located in allegro-5.0.5/build/lib/pkgconfig)

prefix=/usr
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${prefix}/include
version=5.0.5
soversion=5.0
suffix=

Name: allegro
Description: Allegro game programming library
Version: ${version}
Libs: -L${libdir} -lallegro${suffix}
Libs.private:
Cflags: -I${includedir}

.... this is the default file btw

Why isn't it or does seem as though it cannot find the header files when it appears to be finding the library files?

As a side note, on the installation when it got to the point where the install tutorial said to to the following (located in the Running Cmake section):

"Once you've run that, press "c" twice, and then "g". You should now be back to a console."

there was never a prompt to press anything, nor any error.  It just gave the prompt after running thru everything up to that point.  So I don't know what the c twice and g would have done.
I think that is everything. If I forgot an important piece of info let me know.

Thank you all