configure.in (AC_USE_SYSTEM_EXTENSIONS): instead of AC_AIX
* lib/mkmf.rb (create_tmpsrc): we need to include COMMON_HEADERS, namely inclusion of ruby.h, because _GNU_SOURCE is now defined there (if any) and socket.so requires it on Linux systems.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@17793 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
configure.in (AC_USE_SYSTEM_EXTENSIONS): instead of AC_AIX
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@17793 b2dd03c8-39d4-4d8f-98ff-823fe69b080e