xserver compilation failed

[Wu Nian]

When compiled xserver master, it failed with below error:

loader/libloader.a(dlloader.o): In function
`DLUnloadModule':/GFX/build/component/Xorg/xorg/xserver/hw/xfree86/loader/dlloader.c:188: undefined reference to `dlclose'
loader/libloader.a(dlloader.o): In function
`DLLoadModule':/GFX/build/component/Xorg/xorg/xserver/hw/xfree86/loader/dlloader.c:151: undefined reference to `dlopen'
:/GFX/build/component/Xorg/xorg/xserver/hw/xfree86/loader/dlloader.c:153: undefined reference to `dlerror'
loader/libloader.a(dlloader.o): In function
`DLFindSymbol':/GFX/build/component/Xorg/xorg/xserver/hw/xfree86/loader/dlloader.c:116: undefined reference to `dlsym'
loader/libloader.a(dlloader.o): In function
`DLFindSymbolLocal':/GFX/build/component/Xorg/xorg/xserver/hw/xfree86/loader/dlloader.c:102: undefined reference to `dlsym'
loader/libloader.a(dlloader.o): In function
`DLFindSymbol':/GFX/build/component/Xorg/xorg/xserver/hw/xfree86/loader/dlloader.c:127: undefined reference to `dlopen'
:/GFX/build/component/Xorg/xorg/xserver/hw/xfree86/loader/dlloader.c:130: undefined reference to `dlsym'
collect2: ld returned 1 exit status
make[4]: *** [Xorg] Error 1

It seems this failure is caused by commit 
20c6677d1b5f8d77325dd878ffa3df1d0fb01864:
Author: Ben Byer <bbyer at bbyer.apple.com>
Date:   Wed Sep 5 14:31:01 2007 -0700

    configure.ac: exclude pci-access dependency from XDarwin
    
    XDarwin doesn't need any of this pci stuff since it doesn't talk directly to
    so it doesn't make sense to require it when building on OSX/Darwin.


Thanks,
Nian Wu