AM_CONDITIONAL

[Francis Michel]

Hi all, 
I am trying to use the AM_CONDITIONAL macro in order to use that Macro in
the makefile.am as follow in the configure.in 
AC_MSG_CHECKING(Dummy file selection)
AC_ARG_ENABLE(dummyfile,
[ --enable-dummyfile Use debug file],
[case "${enableval}" in
yes) debug=true ;;
no) debug=false ;;
*) AC_MSG_ERROR(bad value ${enableval} for --enable-debug) ;;
esac],[debug=false])
AM_CONDITIONAL(DEBUGSTRING test x$debug = xtrue) 
and in the makefile.am: 
if DEBUGSTRING
libfoo_a_SOURCES = dummy.c file.h
endif 
but the problem is that AUTOMAKE is generating empty codes like that in the
makefile.in 
if DEBUGSTRING 
endif 
# Tell versions [3.59,3.63) of GNU make to not export all variables.
# Otherwise a system limit (for SysV at least) may be exceeded.
.NOEXPORT:
I was expecting something like that: 
@DEBUGSTRING @
Can you help me out there? Is that one of the best way to select different
source code files depending on the input from the confifure script? 
Thanks a lot

Francis Michel