Hi autoconfigurators!
I have a smallish problem using AC_SUBST together with AC_CACHE_VAL.
According to the manual, AC_CACHE_VAL may only contain code to set the
cache-var. But if I want to sent something depending on a cached-var to
AC_SUBST, I end up in concatenating the same values...Example:
AC_CACHE_CHECK([whether whatever accepts -foo],
[sb_cv_foo],
[sb_cv_foo=yes]
)
AC_SUBST([SB_FOOS], ["$SB_FOOS bar"])
On first call, I get $SB_FOOS = bar. On second call I get $SB_FOOS = bar
bar. And so on. How can I prevent adding the same value several times? I
guess there is something like sb_cv_foo_set for the cahing mechanism,
but where is the difference in testing for that instead of putting the
AC_SUBST stuff into the AC_CACHE_CHECK command-to-set section?
greetings,
Stefan
--
Stefan Bienert
Zentrum fuer Bioinformatik
Universitaet Hamburg
Bundesstrasse 43
20146 Hamburg
Germany
Email: [email protected]
Phone: +49 (40) 42838 7345
Fax: +49 (40) 42838 7332
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