mesa需要单独安装么？［解决］

graydream

尝试写一点opengl的东西

emerge mesa的时候出现这样的提示：

1. Calculating dependencies
   
2. !!! All ebuilds that could satisfy "mesa" have been masked.
   
3. !!! One of the following masked packages is required to complete your request:
   
4. - media-libs/mesa-3.5 (masked by: package.mask)
   
5. # Only use the mesa and mesa-glu provided with x11-base/xfree,
   
6. # as the external ones gives problems in most cases with DRI/DRM.
   
7. # Nvidia users do not use it anyhow, and tdfx users report that
   
8. # it works fine with the mesa included with xfree.  If you do
   
9. # unmask these, make sure that you know what you are doing, and
   
10. # know that if anything breaks, then you get to keep the pieces.
    
11. #
    
12. # azarah (26 May 2002)
    
13. 
    
14. 
    
15. For more information, see MASKED PACKAGES section in the emerge man page or
    
16. section 2.2 "Software Availability" in the Gentoo Handbook.

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看qt的文档，说似乎已经装过mesa了，但是我却没有找到这个东西。

原来是glut