A far fetched goal to clean up code quality

[Martin Schroeder]

I propose using following set of GCC flags to enforce code quality in
the long run.

    -Wall -Wextra -Werror\
    -std=gnu11\
    -pedantic \
    -Wchar-subscripts\
    -Wformat\
    -Wformat-nonliteral\
    -Wformat-security\
    -Wmissing-braces\
    -Wparentheses\
    -Wsequence-point\
    -Wswitch\
    -Wtrigraphs\
    -Wno-unused-function\
    -Wunused-label\
    -Wno-unused-parameter\
    -Wunused-variable\
    -Wunused-value\
    -Wuninitialized\
    -Wdiv-by-zero\
    -Wfloat-equal\
    -Wdouble-promotion\
    -fsingle-precision-constant\
    -Wshadow\
    -Wpointer-arith\
    -Wwrite-strings\
    -Wconversion\
    -Wredundant-decls\
    -Wunreachable-code\
    -Winline\
    -Wenum-compare \
    -Wlong-long\
    -Wchar-subscripts