In the first example for AC_ARG_WITH, there's an "if test…fi" block:
if test "x$with_readline" != xcheck; then
AC_MSG_FAILURE(
[--with-readline was given, but test for readline failed])
fi
Is there some reason why this doesn't use AS_IF?
I see a comment above saying:
@c FIXME: Remove AS_IF when the problem of AC_REQUIRE within `if' is
solved.
but it's not clear whether that's relevant (the commit log that introduced
the comment doesn't seem to explain it).
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