Paul Eggert wrote: > On 11/30/11 02:25, Jim Meyering wrote: >> how about automating the extraction of the list of >> warnings from gcc sources or from some web page > > Or perhaps extract it from the gcc executable > itself? Then you'd get all the warnings that the > current GCC supports.
Hah! I didn't know about --help=warnings. That looks perfect. For a quick and dirty comparison, I did this: (using gcc 4.7.0 20111124) diff -u \ <(sed -n 's/^ *\(-[^ ]*\) .*/\1/p' /gnulib/m4/manywarnings.m4 |sort) \ <(gcc --help=warnings|sed -n 's/^ \(-[^ ]*\) .*/\1/p' |sort) which shows at least one false positive (i.e. -Wformat=2 vs -Wformat=) and many new warnings: --- /proc/self/fd/11 2011-11-30 12:07:49.747440364 +0100 +++ /proc/self/fd/12 2011-11-30 12:07:49.747440364 +0100 @@ -1,79 +1,173 @@ +--all-warnings +--extra-warnings -W -Wabi +-Waddress -Waggregate-return +-Waliasing +-Walign-commons -Wall +-Wampersand +-Warray-bounds +-Warray-temporaries +-Wassign-intercept -Wattributes -Wbad-function-cast -Wbuiltin-macro-redefined -Wc++-compat +-Wc++0x-compat +-Wc++11-compat -Wcast-align -Wcast-qual +-Wchar-subscripts +-Wcharacter-truncation +-Wclobbered +-Wcomment +-Wcomments -Wconversion +-Wconversion-extra +-Wconversion-null -Wcoverage-mismatch -Wcpp +-Wctor-dtor-privacy -Wdeclaration-after-statement +-Wdelete-non-virtual-dtor -Wdeprecated -Wdeprecated-declarations -Wdisabled-optimization -Wdiv-by-zero -Wdouble-promotion +-Weffc++ +-Wempty-body -Wendif-labels +-Wenum-compare +-Werror-implicit-function-declaration -Wextra -Wfloat-equal +-Wformat -Wformat-contains-nul -Wformat-extra-args -Wformat-nonliteral -Wformat-security -Wformat-y2k -Wformat-zero-length --Wformat=2 +-Wformat= +-Wfree-nonheap-object +-Wfunction-elimination +-Wignored-qualifiers +-Wimplicit +-Wimplicit-function-declaration +-Wimplicit-int +-Wimplicit-interface +-Wimplicit-procedure -Winit-self -Winline +-Wint-to-pointer-cast +-Wintrinsic-shadow +-Wintrinsics-std +-Winvalid-memory-model +-Winvalid-offsetof -Winvalid-pch +-Wjump-misses-init +-Wlarger-than- +-Wlarger-than=<number> +-Wline-truncation -Wlogical-op -Wlong-long +-Wmain +-Wmaybe-uninitialized +-Wmissing-braces -Wmissing-declarations +-Wmissing-field-initializers -Wmissing-format-attribute -Wmissing-include-dirs -Wmissing-noreturn +-Wmissing-parameter-type -Wmissing-prototypes -Wmudflap -Wmultichar --Wmultichar +-Wnarrowing -Wnested-externs --Wnormalized=nfc +-Wnoexcept +-Wnon-template-friend +-Wnon-virtual-dtor +-Wnonnull +-Wnormalized=<id|nfc|nfkc> +-Wold-style-cast +-Wold-style-declaration -Wold-style-definition -Woverflow -Woverlength-strings +-Woverloaded-virtual +-Woverride-init -Wpacked -Wpacked-bitfield-compat -Wpadded +-Wparentheses +-Wpmf-conversions -Wpointer-arith +-Wpointer-sign -Wpointer-to-int-cast -Wpragmas +-Wproperty-assign-default +-Wprotocol +-Wreal-q-constant -Wredundant-decls +-Wreorder +-Wreturn-type +-Wselector +-Wsequence-point -Wshadow --Wsign-conversion +-Wsign-compare +-Wsign-promo -Wstack-protector +-Wstack-usage= -Wstrict-aliasing +-Wstrict-aliasing= +-Wstrict-null-sentinel -Wstrict-overflow +-Wstrict-overflow= -Wstrict-prototypes +-Wstrict-selector-match -Wsuggest-attribute=const -Wsuggest-attribute=noreturn -Wsuggest-attribute=pure +-Wsurprising +-Wswitch -Wswitch-default -Wswitch-enum -Wsync-nand +-Wsynth -Wsystem-headers +-Wtabs -Wtraditional -Wtraditional-conversion -Wtrampolines +-Wtrigraphs +-Wtype-limits +-Wundeclared-selector -Wundef +-Wunderflow +-Wuninitialized -Wunknown-pragmas --Wunreachable-code -Wunsafe-loop-optimizations +-Wunsuffixed-float-constants -Wunused +-Wunused-but-set-parameter +-Wunused-but-set-variable +-Wunused-dummy-argument +-Wunused-function +-Wunused-label +-Wunused-local-typedefs -Wunused-macros +-Wunused-parameter +-Wunused-result +-Wunused-value +-Wunused-variable +-Wvariadic-macros +-Wvector-operation-performance -Wvla -Wvolatile-register-var -Wwrite-strings +-Wzero-as-null-pointer-constant +-frequire-return-statement
