FYI [PATCH] libtool: minimise forks per invocation under bash.

Thanks to Eric Blake, Peter O'Gorman and Bob Friesenhahn for steering me in this direction. * build-aux/general.m4sh (lt_HAVE_PLUSEQ_OP, lt_HAVE_ARITH_OP) (lt_HAVE_XSI_OPS): Set these without forking a test script when running under bash, to avoid a few unnecessary forks. Signed-off-by: Gary V. V

FYI: [PATCH] bootstrap: adopt autoconf echo normalization code.

Pushed as obvious. Dash shipped with Ubutu-11.10 as /bin/sh, among others, still has a crippled echo builtin that mis-handles backslashes. * build-aux/options-parser (bs_echo): Adopt the autoconf echo normalization code to find a suitable replacement for buggy echo commands. Adjust all uses of ech