CONFIG_SUBDIRS vs. accumulating configure args.

[Ralf Corsepius]

Hi,

The example below (3 cascaded config-subdirs) demonstrates what I think
is a bug in autoconf-2.53c's handling of accumulating/duplicate
configure arguments.

# ./configure --prefix=/foo --prefix=/bar
# find . -name Makefile -exec grep -H '^prefix =' {} \;
./sub/sub/Makefile:prefix = /foo
./sub/Makefile:prefix = /bar
./Makefile:prefix = /bar

AFAIS, the cause for this behavior is autoconf's attempt to 
"stripping off duplicate args" in _AC_INIT_PREPARE (~line 1154 in
general.m4), which causes earlier "dups" to override later "dups".
This is different from other places in autoconf and in former versions
of autoconf, where "later dups" overrode "earlier dups"

Ralf

subtest-0.0.tar.bz2
Description: application/bzip