EmDroid questions

EmDroid answers

• Why does linking to librt swap performance between g++ and clang?
• Get an iterator from a char pointer (C++)
• Why can you assign an array to a char pointer?
• Update CFLAGS or LDFLAGS in makefile depending on current OS
• Multiplying floats and keep/get double precision accuracy
• How to use latest boost version in Travis CI?
• Memory efficient std::map alternative
• C++ `ifdef` with concatenation of macros values
• Little performance increasing when using multiple threads
• Compare ptr with nullptr in gtest