Output Variable and AM_CPPFLAGS

[Frank A. Uepping]

Hi,
I want to pass an additional cpp flag (-I) to the compilation process.
Here is what I am doing:
My configure.ac determines the additional include directory and
does a `AC_SUBST([MYINCL], [$myincl])' on it.
Then Makefile.am does a `AM_CPPFLAGS = address@hidden@'.

Is this the proper way to do it?
Especially I am concerned about clobbering any previous meaning
of AM_CPPFLAGS. A `AM_CPPFLAGS = address@hidden@  $AM_CPPFLAGS'
seams not to work.

/FAU