On Fri, 10 Jun 2011, Stefano Lattarini wrote:
Nope, it gets the information from the fact each AM_CONDITIONAL invocation does this:AC_CONFIG_COMMANDS_PRE( [if test -z "${$1_TRUE}" && test -z "${$1_FALSE}"; then AC_MSG_ERROR([[conditional "$1" was never defined. Usually this means the macro was only invoked conditionally.]]) fi])])
Hi Stefano, Bruno, how about the following alternative (for all conditionals, or just for some of them, e.g., those under the regime of AM_IGNORE_UNDEFINED_CONDITIONALS): Replace the AC_MSG_ERROR() above by a warning and set both $1_TRUE and $1_FALSE to something that, when not hidden in a false branch of the Makefile, (1) triggers a make syntax error, and (2) contains sufficient info to deduce the cause for that error. That way there is a warning from configure (often overlooked and/or ignored), but an error from make only if that conditional is actually needed. Regards Peter
