diff options
Diffstat (limited to 'gl/m4/manywarnings.m4')
| -rw-r--r-- | gl/m4/manywarnings.m4 | 67 |
1 files changed, 60 insertions, 7 deletions
diff --git a/gl/m4/manywarnings.m4 b/gl/m4/manywarnings.m4 index e1cee6c..0f06ade 100644 --- a/gl/m4/manywarnings.m4 +++ b/gl/m4/manywarnings.m4 @@ -1,5 +1,5 @@ -# manywarnings.m4 serial 6 -dnl Copyright (C) 2008-2014 Free Software Foundation, Inc. +# manywarnings.m4 serial 8 +dnl Copyright (C) 2008-2017 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. @@ -62,10 +62,11 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC], CFLAGS="$CFLAGS -W -Werror" AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( - [[void f (void) + [[int f (void) { typedef struct { int a; int b; } s_t; s_t s1 = { 0, }; + return s1.b; } ]], [[]])], @@ -93,29 +94,44 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC], fi # List all gcc warning categories. + # To compare this list to your installed GCC's, run this Bash command: + # + # comm -3 \ + # <(sed -n 's/^ *\(-[^ ]*\) .*/\1/p' manywarnings.m4 | sort) \ + # <(gcc --help=warnings | sed -n 's/^ \(-[^ ]*\) .*/\1/p' | sort | + # grep -v -x -f <( + # awk '/^[^#]/ {print $1}' ../build-aux/gcc-warning.spec)) + gl_manywarn_set= for gl_manywarn_item in \ + -fno-common \ -W \ -Wabi \ -Waddress \ -Waggressive-loop-optimizations \ -Wall \ - -Warray-bounds \ -Wattributes \ -Wbad-function-cast \ + -Wbool-compare \ -Wbuiltin-macro-redefined \ -Wcast-align \ -Wchar-subscripts \ + -Wchkp \ -Wclobbered \ -Wcomment \ -Wcomments \ -Wcoverage-mismatch \ -Wcpp \ + -Wdate-time \ -Wdeprecated \ -Wdeprecated-declarations \ + -Wdesignated-init \ -Wdisabled-optimization \ + -Wdiscarded-array-qualifiers \ + -Wdiscarded-qualifiers \ -Wdiv-by-zero \ -Wdouble-promotion \ + -Wduplicated-cond \ -Wempty-body \ -Wendif-labels \ -Wenum-compare \ @@ -124,22 +140,31 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC], -Wformat-extra-args \ -Wformat-nonliteral \ -Wformat-security \ + -Wformat-signedness \ -Wformat-y2k \ -Wformat-zero-length \ + -Wframe-address \ -Wfree-nonheap-object \ + -Whsa \ + -Wignored-attributes \ -Wignored-qualifiers \ -Wimplicit \ -Wimplicit-function-declaration \ -Wimplicit-int \ + -Wincompatible-pointer-types \ -Winit-self \ -Winline \ + -Wint-conversion \ -Wint-to-pointer-cast \ -Winvalid-memory-model \ -Winvalid-pch \ -Wjump-misses-init \ + -Wlogical-not-parentheses \ -Wlogical-op \ -Wmain \ -Wmaybe-uninitialized \ + -Wmemset-transposed-args \ + -Wmisleading-indentation \ -Wmissing-braces \ -Wmissing-declarations \ -Wmissing-field-initializers \ @@ -150,9 +175,12 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC], -Wnarrowing \ -Wnested-externs \ -Wnonnull \ - -Wnormalized=nfc \ + -Wnonnull-compare \ + -Wnull-dereference \ + -Wodr \ -Wold-style-declaration \ -Wold-style-definition \ + -Wopenmp-simd \ -Woverflow \ -Woverlength-strings \ -Woverride-init \ @@ -165,8 +193,13 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC], -Wpragmas \ -Wreturn-local-addr \ -Wreturn-type \ + -Wscalar-storage-order \ -Wsequence-point \ -Wshadow \ + -Wshift-count-negative \ + -Wshift-count-overflow \ + -Wshift-negative-value \ + -Wsizeof-array-argument \ -Wsizeof-pointer-memaccess \ -Wstack-protector \ -Wstrict-aliasing \ @@ -176,10 +209,14 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC], -Wsuggest-attribute=format \ -Wsuggest-attribute=noreturn \ -Wsuggest-attribute=pure \ + -Wsuggest-final-methods \ + -Wsuggest-final-types \ -Wswitch \ + -Wswitch-bool \ -Wswitch-default \ -Wsync-nand \ -Wsystem-headers \ + -Wtautological-compare \ -Wtrampolines \ -Wtrigraphs \ -Wtype-limits \ @@ -203,13 +240,29 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC], -Wvla \ -Wvolatile-register-var \ -Wwrite-strings \ - -fdiagnostics-show-option \ - -funit-at-a-time \ \ ; do gl_manywarn_set="$gl_manywarn_set $gl_manywarn_item" done + # gcc --help=warnings outputs an unusual form for these options; list + # them here so that the above 'comm' command doesn't report a false match. + gl_manywarn_set="$gl_manywarn_set -Warray-bounds=2" + gl_manywarn_set="$gl_manywarn_set -Wnormalized=nfc" + gl_manywarn_set="$gl_manywarn_set -Wshift-overflow=2" + gl_manywarn_set="$gl_manywarn_set -Wunused-const-variable=2" + + # These are needed for older GCC versions. + if test -n "$GCC"; then + case `($CC --version) 2>/dev/null` in + 'gcc (GCC) '[[0-3]].* | \ + 'gcc (GCC) '4.[[0-7]].*) + gl_manywarn_set="$gl_manywarn_set -fdiagnostics-show-option" + gl_manywarn_set="$gl_manywarn_set -funit-at-a-time" + ;; + esac + fi + # Disable specific options as needed. if test "$gl_cv_cc_nomfi_needed" = yes; then gl_manywarn_set="$gl_manywarn_set -Wno-missing-field-initializers" |