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The Solaris linker recently added a -z parent flag for easier checking of symbol definitions in plugins against the program that loads them. If that's present, this enables it, along with -z defs to error on undefined symbols to alert us if any modules call symbols that won't be found at runtime. This builds upon, and requires, the recent Cygwin work to build Xorg. It moves a couple more modules to be after the Xorg binary in the build order so that they can find the binary to check against, much as the Cygwin changes did (these would be modules built on Solaris but not Cygwin). v2: This version only sets the flags for the xorg-server build itself, and does not yet export them in xorg-server.pc to the drivers, since most of the drivers are not ready to build with -no-undefined yet. Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Yaakov Selkowitz <yselkowitz@users.sourceforge.net>