problem with ifelse

[Vincent Torri]

Hey,

I want to write an m4 macro which specify the correct AC_ARG_ENABLE 
options according to the value ("yes" or "no") of a parameter.

Here is the macro:

dnl use: ECORE_CHECK_MODULE(Foo, default-enabled[, dependancy[, 
ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]])
AC_DEFUN([ECORE_CHECK_MODULE],
[
pushdef([UP], translit([$1], [a-z], [A-Z]))dnl
pushdef([DOWN], translit([$1], [A-Z], [a-z]))dnl

have_ecore_[]DOWN="no"
ecore_[]DOWN[]_cflags=""
ecore_[]DOWN[]_libs=""

ifelse([$2], [no],
[
   AC_ARG_ENABLE(ecore-[]DOWN,
      [AC_HELP_STRING(
          [--enable-ecore-[]DOWN],
          [enable the ecore_[]DOWN module. [[default=disabled]]])],
      [want_ecore_[]DOWN=$enableval],
      [want_ecore_[]DOWN=no])
],
[
   AC_ARG_ENABLE(ecore-[]DOWN,
      [AC_HELP_STRING(
          [--disable-ecore-[]DOWN],
          [disable the ecore_[]DOWN module. [[default=enabled]]])],
      [want_ecore_[]DOWN=$enableval],
      [want_ecore_[]DOWN=yes])
])

AC_MSG_CHECKING(whether ecore_[]DOWN module is to be built)

if test "x$want_ecore_[]DOWN" = "xyes" ; then
  if test "x$3" = "x" -o "x$3" = "xyes" ; then
    AC_DEFINE(BUILD_ECORE_[]UP, 1, [Build Ecore_$1 Module])
    have_ecore_[]DOWN="yes"
    ecore_[]DOWN[]_libs="-lecore_[]DOWN"
    AC_MSG_RESULT([yes])
  else
    AC_MSG_RESULT([no (dependancy failed)])
  fi
else
  AC_MSG_RESULT([no])
fi

AM_CONDITIONAL(BUILD_ECORE_[]UP, test "x$have_ecore_[]DOWN" = "xyes")

if test "x$have_ecore_[]DOWN" = "xyes" ; then
  ifelse([$4], , :, [$4])
else
  ifelse([$5], , :, [$5])
fi

AC_SUBST(ecore_[]DOWN[]_cflags)
AC_SUBST(ecore_[]DOWN[]_libs)

popdef([UP])
popdef([DOWN])
])


The problem is with

ifelse([$2], [no] *****)

Whatever the 2nd parameter is ("yes" or "no"), it seems that the test 
always fails. I try with m4_if, without success too.

Can someone tell me what the proble is ?

thank you

Vincent Torri