This is a beginner question. I am modifying a package and would like to introduce a new configure option to set a value which had been previously hardcoded.
So - for example - I want to provide an optional configure option
--foo-barian-characteristic=VALUE
and place a default definition in config.h.in
#undef FOO_BARIAN_CHARACTERISTIC
and then write something in configure.ac which would respond to the user specifying the option by replacing #undef by
#define FOO_BARIAN_CHARACTERISTIC=VALUE
in config.h
How can I do this? I can see how by using AC_ARG_ENABLE and AC_DEFINE_UNQUOTED, but that would require that my option appear to be an --enable-xxx kind - the user would have to specify
configure ... --enable-foo-barian-characteristic=VALUE
which is slightly misleading since this is a setting for a default feature.
John Lumby
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