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Paul Eggert authored
Preserve ACLOCAL_PATH in later builds, so that by default it has the same value as it did in the first build after initial checkout. * Makefile.in (ACLOCAL_PATH): New macro. ($(srcdir)/aclocal.m4): Use it. * configure.ac (ACLOCAL_PATH): AC_SUBST it. * autogen.sh (env_space): New var. Tell user what variables, if any, to pass to 'configure'.
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