[Dune] [#1029] Fix list of supported build utilities

[Dune]

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The following task has a new comment added:

FS#1029 - Fix list of supported build utilities
User who did this - Andreas Lauser (andlaus)

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My personal stance on that matter is that supporting old compilers is well and nice, but as soon as this support hampers productivity it should be dropped. IMHO GCC 4.1 (as well as probably 4.2 and 4.3) is such a case. IMO users stuck with half a decade-old operating systems should simply build a newer version of a compiler on in their home directory or scratch space. (that's not too difficult: http://gcc.gnu.org/install/build.html)

besides, newer compilers usually provide a quite reasonable speedup: When I switched from GCC 4.2 to 4.3 quite some time ago, I immediately got 20% more performance and I heard rumors that using GCC 4.6 instead of GCC 4.5 speed things up by 10% for PDELab.

I acknowledge, though, that opinions on that subject are quite diverse...
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