gcc 7 with useful warnings (only for C)

gccw

#!/bin/sh

gcc     \
        -Wabi   \
        -Waddress       \
        -Walloc-zero    \
        -Walloca        \
        -Warray-bounds=2        \
        -Wbad-function-cast     \
        -Wbool-compare  \
        -Wbool-operation        \
        -Wbuiltin-declaration-mismatch  \
        -Wbuiltin-macro-redefined       \
        -Wc90-c99-compat        \
        -Wc99-c11-compat        \
        -Wcast-qual     \
        -Wchar-subscripts       \
        -Wchkp  \
        -Wclobbered     \
        -Wcomment       \
        -Wconversion    \
        -Wcpp   \
        -Wdangling-else \
        -Wdate-time     \
        -Wdeclaration-after-statement   \
        -Wdeprecated    \
        -Wdesignated-init       \
        -Wdiscarded-array-qualifiers    \
        -Wdiscarded-qualifiers  \
        -Wdiv-by-zero   \
        -Wdouble-promotion      \
        -Wduplicate-decl-specifier      \
        -Wduplicated-branches   \
        -Wduplicated-cond       \
        -Wempty-body    \
        -Wendif-labels  \
        -Wenum-compare  \
        -Werror \
        -Wexpansion-to-defined  \
        -Wfloat-conversion      \
        -Wfloat-equal   \
        -Wformat-contains-nul   \
        -Wformat-extra-args     \
        -Wformat-nonliteral     \
        -Wformat-overflow=2     \
        -Wformat-security       \
        -Wformat-signedness     \
        -Wformat-truncation=2   \
        -Wformat-y2k    \
        -Wformat-zero-length    \
        -Wformat=2      \
        -Wframe-address \
        -Wignored-attributes    \
        -Wignored-qualifiers    \
        -Wimplicit      \
        -Wimplicit-fallthrough=3        \
        -Wimplicit-function-declaration \
        -Wimplicit-int  \
        -Wimport        \
        -Wincompatible-pointer-types    \
        -Winit-self     \
        -Wint-conversion        \
        -Wint-in-bool-context   \
        -Wint-to-pointer-cast   \
        -Winvalid-pch   \
        -Wjump-misses-init      \
        -Wlogical-not-parentheses       \
        -Wlogical-op    \
        -Wlong-long     \
        -Wmain  \
        -Wmaybe-uninitialized   \
        -Wmemset-elt-size       \
        -Wmemset-transposed-args        \
        -Wmisleading-indentation        \
        -Wmissing-braces        \
        -Wmissing-declarations  \
        -Wmissing-field-initializers    \
        -Wmissing-include-dirs  \
        -Wmissing-parameter-type        \
        -Wmissing-prototypes    \
        -Wmudflap       \
        -Wmultichar     \
        -Wnarrowing     \
        -Wnested-externs        \
        -Wnonnull       \
        -Wnonnull-compare       \
        -Wnormalized    \
        -Wnormalized=nfkc       \
        -Wold-style-declaration \
        -Wold-style-definition  \
        -Wopenmp-simd   \
        -Woverlength-strings    \
        -Woverride-init \
        -Woverride-init-side-effects    \
        -Wpacked-bitfield-compat        \
        -Wparentheses   \
        -Wpedantic      \
        -Wpointer-arith \
        -Wpointer-compare       \
        -Wpointer-sign  \
        -Wpointer-to-int-cast   \
        -Wpragmas       \
        -Wpsabi \
        -Wredundant-decls       \
        -Wrestrict      \
        -Wreturn-type   \
        -Wscalar-storage-order  \
        -Wsequence-point        \
        -Wshift-count-negative  \
        -Wshift-count-overflow  \
        -Wshift-negative-value  \
        -Wshift-overflow=2      \
        -Wsign-compare  \
        -Wsign-conversion       \
        -Wsizeof-array-argument \
        -Wsizeof-pointer-memaccess      \
        -Wstrict-aliasing=3     \
        -Wstrict-overflow=5     \
        -Wstrict-prototypes     \
        -Wstringop-overflow=4   \
        -Wsuggest-attribute=const       \
        -Wsuggest-attribute=format      \
        -Wsuggest-attribute=noreturn    \
        -Wsuggest-attribute=pure        \
        -Wswitch        \
        -Wswitch-bool   \
        -Wswitch-default        \
        -Wswitch-enum   \
        -Wsync-nand     \
        -Wsystem-headers        \
        -Wtautological-compare  \
        -Wtraditional   \
        -Wtraditional-conversion        \
        -Wtrigraphs     \
        -Wundef \
        -Wuninitialized \
        -Wunknown-pragmas       \
        -Wunsuffixed-float-constants    \
        -Wunused        \
        -Wunused-const-variable=2       \
        -Wunused-local-typedefs \
        -Wunused-macros \
        -Wunused-result \
        -Wunused-variable       \
        -Wvarargs       \
        -Wvariadic-macros       \
        -Wvla   \
        -Wvolatile-register-var \
        -Wwrite-strings \
        \
        "$@"