LibMesa on CentOS 6, 2017Q1

[Jason Bacon <bacon4000%gmail.com@localhost>]

First issue I hit with the 2017Q1 snapshot:

make[2]: Entering directory 
`/home/bacon/Pkgsrc/pkgsrc-2017Q1/graphics/MesaLib/work/mesa-11.2.2/src/gallium'
Making all in auxiliary
make[3]: Entering directory 
`/home/bacon/Pkgsrc/pkgsrc-2017Q1/graphics/MesaLib/work/mesa-11.2.2/src/gallium/auxiliary'
  CXX      gallivm/lp_bld_debug.lo
cc1plus: error: unrecognized command line option "-Wdelete-non-virtual-dtor"
cc1plus: error: unrecognized command line option "-std=c++11"
cc1plus: error: unrecognized command line option "-std=c++11"
cc1plus: warning: unrecognized command line option 
"-Wno-maybe-uninitialized"
make[3]: *** [gallivm/lp_bld_debug.lo] Error 1
make[3]: Leaving directory 
`/home/bacon/Pkgsrc/pkgsrc-2017Q1/graphics/MesaLib/work/mesa-11.2.2/src/gallium/auxiliary'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory 
`/home/bacon/Pkgsrc/pkgsrc-2017Q1/graphics/MesaLib/work/mesa-11.2.2/src/gallium'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory 
`/home/bacon/Pkgsrc/pkgsrc-2017Q1/graphics/MesaLib/work/mesa-11.2.2/src'
make: *** [all-recursive] Error 1
*** Error code 2

Stop.
bmake.bin[1]: stopped in /home/bacon/Pkgsrc/pkgsrc-2017Q1/graphics/MesaLib
*** Error code 1

LibMesa has GCC_REQD+=4.2, but GCC 4.2 does not support C++11.

I could probably get around this easily with GCC_REQD+=4.8, but I'm 
wondering if there's a simple solution that doesn't require such a heavy 
dependency.

Any suggestions?

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