test -e in configure is unportable
When I tried to build ruby 1.9.2-p290 on Solaris 10 (both SPARC and x86), it failed with an
error in the configure script:
checking for cd using phisical directory... ./configure: test: argument expected
While the typo has been fixed in 1.9.3-p0, the use of test -e is still there. Solaris
10 /bin/sh doesn't support it, it lets the configure script abort immediately, and it is
documented as `avoid/unportable' in the autoconf docs.