finding the location of header (.h) files

[mick]

On Fri, 14 Jul 2006 18:39, Stepan Kasal wrote:
I have an application that depends on gtkhtml-2.0, which seems to put its 
headers in a diferent location in almost every linux or BSD distribution so I 
need to replace 
INCLUDES = -I/usr/include/gtkhtml-2.0
in Makefile.am.

Its been suggested that I use 
AC_CHECK_HEADER ([libgtkhtml/gtkhtml.h], 
                 [action-if-found], 
                [AC_MSG_ERROR([BUMMER, Maybe if you install libgtkhtml-2 & 
libgtkhtml-2-dev 
this pig will fly])],
                 [Macro]
                 [includes = 'default-includes'])
in configure.ac.
I'm trying to nut it out but getting more confused with every step, I'm 
guessing I need to replace "macro" with something like 'locate gtkhtml.h' 
then some sed? to trim it down.

Have I got that right?
if locate gtkhtml.h gives
/usr/include/gtkhtml-2.0/libgtkhtml/gtkhtml.h
what would clean it up to produce the required string?

thanks in advance
/]/]ik