[docs] Change CrossCompilation guidde to reflect changes in Clang/GCC

Description

[docs] Change CrossCompilation guidde to reflect changes in Clang/GCC

HowToCrossCompile was outdated and generating too much traffic on the mailing
list with similar queries. This change helps offset most of the problems that
were reported recently including:

  • Removing the -ccc-gcc-name, adding --sysroot
  • Making references to Debian's multiarch for target libraries
  • Expanding -DCMAKE_CXX_FLAGS for both GCC and Clang
  • Some formatting and clarifications in the text

Details

Committed
rengolinMay 10 2016, 5:54 AM
Parents
rL269053: [FIX] Create error-restrictions late
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