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Re: Plan: Wednesday
>>>>> "Robert" == Robert Collins <robert.collins@itdomain.com.au> writes:
Robert> test ./pr220.test aclocal: macro `AM_CONDITIONAL_' required
Robert> but not defined FAIL: pr220.test
Err, sorry, I meant AC_DEFUN, not AC_DEFINE...
Of course this will work only with non-toplevel AM_CONDITIONAL (the
same old story: AC_REQUIRE at the top level is _wrong_):
AC_DEFUN([AM_CONDITIONAL],
[ifelse([$1], [TRUE],
[errprint(__file__:__line__: [$0: invalid condition: $1
])dnl
m4exit(1)])dnl
ifelse([$1], [FALSE],
[errprint(__file__:__line__: [$0: invalid condition: $1
])dnl
m4exit(1)])dnl
AC_DEFUN([AM_CONDITIONAL_$1],
[AC_SUBST([$1_TRUE], ['#'])
AC_SUBST([$1_FALSE], ['#'])
if $2; then
$1_TRUE=
$1_FALSE='#'
else
$1_TRUE='#'
$1_FALSE=
fi
])
AC_REQUIRE([AM_CONDITIONAL_$1])
# Leave something, macro expanding to nothing can provoke empty if's.
:
])
AC_DEFUN([MY_BAR],
[if false; then
AM_CONDITIONAL([BAR], true)
fi
])
AC_INIT
if false; then
AM_CONDITIONAL([FOO], true)
fi
MY_BAR
cat >foo.in <<eof
FT: @FOO_TRUE@
FF: @FOO_FALSE@
BT: @BAR_TRUE@
BF: @BAR_FALSE@
eof
AC_OUTPUT(foo)
cat foo
gives:
/tmp % ./configure
16:28 remo
configure: creating ./config.status
config.status: creating foo
FT:
FF:
BT:
BF: #
but anyway, this is broken since it means that $2 will be evaluated
before the code given by the user, so chances are even higher to
perform unexpected things. Well, very expectable to Autoconf gurus,
but not to users :)