Skip dup convenience deplibs test more robustly

powerpc-apple-dwarwin5.5 gets an unexpected pass for the duplicate convenience deplibs test. Rather than grow the list of xfail exclusions, I changed the test to skip when the link command that might need a working --preserve-dup-deps can succeed without it. The test continues to xfail on GNU/Lin

Rework a problematic use of ${1+"$@"}

Zsh performs field splitting on `${1+"$@"}'; m4sh mostly insulates us from this fact with `alias -g '${1+"$@"}'='"$@"''. However, this alias is not used if the parameter expansion is part of a larger word, such as `"foo"${1+"$@"}'. This patches func_echo to avoid the problem, fixing quote.test on

Re: Fix `make dist' on systems with no F9x compiler

On Fri, May 04, 2007 at 08:51:06AM +0200, Ralf Wildenhues wrote: > * Noah Misch wrote on Fri, May 04, 2007 at 03:52:24AM CEST: > > `make dist' needs every test demo directory configured. If the system has > > no > > F90 compiler, tests/fcdemo/configure always fails. This patch adds an > > optio