X-Git-Url: https://git.gag.com/?a=blobdiff_plain;ds=sidebyside;f=m4%2Fmanywarnings.m4;h=dda3d468aefe89392ed28e80872db396821aeda9;hb=80de5593c97eff61f31584362041b5b2432fbe48;hp=be6d4c91c50eebc6dbacf962fac9b3cf651ef4ba;hpb=d738e90e8360e101b94fca8c79147f59565f62d8;p=debian%2Fgzip

diff --git a/m4/manywarnings.m4 b/m4/manywarnings.m4
index be6d4c9..dda3d46 100644
--- a/m4/manywarnings.m4
+++ b/m4/manywarnings.m4
@@ -1,5 +1,5 @@
-# manywarnings.m4 serial 5
-dnl Copyright (C) 2008-2013 Free Software Foundation, Inc.
+# manywarnings.m4 serial 13
+dnl Copyright (C) 2008-2018 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.
@@ -33,8 +33,17 @@ AC_DEFUN([gl_MANYWARN_COMPLEMENT],
 # Add all documented GCC warning parameters to variable VARIABLE.
 # Note that you need to test them using gl_WARN_ADD if you want to
 # make sure your gcc understands it.
+#
+# The effects of this macro depend on the current language (_AC_LANG).
 AC_DEFUN([gl_MANYWARN_ALL_GCC],
+[_AC_LANG_DISPATCH([$0], _AC_LANG, $@)])
+
+# Specialization for _AC_LANG = C.
+# Use of m4_defun rather than AC_DEFUN works around a bug in autoconf < 2.63b.
+m4_defun([gl_MANYWARN_ALL_GCC(C)],
 [
+  AC_LANG_PUSH([C])
+
   dnl First, check for some issues that only occur when combining multiple
   dnl gcc warning categories.
   AC_REQUIRE([AC_PROG_CC])
@@ -62,10 +71,11 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC],
         CFLAGS="$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;
                }
              ]],
              [[]])],
@@ -93,67 +103,100 @@ 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 -f <(
+  #         awk '/^[^#]/ {print $1}' ../build-aux/gcc-warning.spec))
+
   gl_manywarn_set=
-  for gl_manywarn_item in \
+  for gl_manywarn_item in -fno-common \
     -W \
     -Wabi \
     -Waddress \
     -Waggressive-loop-optimizations \
     -Wall \
-    -Warray-bounds \
     -Wattributes \
     -Wbad-function-cast \
+    -Wbool-compare \
+    -Wbool-operation \
+    -Wbuiltin-declaration-mismatch \
     -Wbuiltin-macro-redefined \
     -Wcast-align \
     -Wchar-subscripts \
+    -Wchkp \
     -Wclobbered \
     -Wcomment \
     -Wcomments \
     -Wcoverage-mismatch \
     -Wcpp \
+    -Wdangling-else \
+    -Wdate-time \
     -Wdeprecated \
     -Wdeprecated-declarations \
+    -Wdesignated-init \
     -Wdisabled-optimization \
+    -Wdiscarded-array-qualifiers \
+    -Wdiscarded-qualifiers \
     -Wdiv-by-zero \
     -Wdouble-promotion \
+    -Wduplicated-branches \
+    -Wduplicated-cond \
+    -Wduplicate-decl-specifier \
     -Wempty-body \
     -Wendif-labels \
     -Wenum-compare \
+    -Wexpansion-to-defined \
     -Wextra \
     -Wformat-contains-nul \
     -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-in-bool-context \
     -Wint-to-pointer-cast \
     -Winvalid-memory-model \
     -Winvalid-pch \
     -Wjump-misses-init \
+    -Wlogical-not-parentheses \
     -Wlogical-op \
     -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 \
-    -Wnormalized=nfc \
+    -Wnonnull-compare \
+    -Wnull-dereference \
+    -Wodr \
     -Wold-style-declaration \
     -Wold-style-definition \
+    -Wopenmp-simd \
     -Woverflow \
     -Woverlength-strings \
     -Woverride-init \
@@ -161,13 +204,21 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC],
     -Wpacked-bitfield-compat \
     -Wparentheses \
     -Wpointer-arith \
+    -Wpointer-compare \
     -Wpointer-sign \
     -Wpointer-to-int-cast \
     -Wpragmas \
+    -Wpsabi \
+    -Wrestrict \
     -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 \
@@ -177,10 +228,15 @@ 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 \
+    -Wswitch-unreachable \
     -Wsync-nand \
     -Wsystem-headers \
+    -Wtautological-compare \
     -Wtrampolines \
     -Wtrigraphs \
     -Wtype-limits \
@@ -209,6 +265,48 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC],
     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.
+  # Would prefer "min (PTRDIFF_MAX, SIZE_MAX)", but it must be a literal.
+  # Also, AC_COMPUTE_INT requires it to fit in a long; it is 2**63 on
+  # the only platforms where it does not fit in a long, so make that
+  # a special case.
+  AC_MSG_CHECKING([max safe object size])
+  AC_COMPUTE_INT([gl_alloc_max],
+    [LONG_MAX < (PTRDIFF_MAX < (size_t) -1 ? PTRDIFF_MAX : (size_t) -1)
+     ? -1
+     : PTRDIFF_MAX < (size_t) -1 ? (long) PTRDIFF_MAX : (long) (size_t) -1],
+    [[#include <limits.h>
+      #include <stddef.h>
+      #include <stdint.h>
+    ]],
+    [gl_alloc_max=2147483647])
+  case $gl_alloc_max in
+    -1) gl_alloc_max=9223372036854775807;;
+  esac
+  AC_MSG_RESULT([$gl_alloc_max])
+  gl_manywarn_set="$gl_manywarn_set -Walloc-size-larger-than=$gl_alloc_max"
+  gl_manywarn_set="$gl_manywarn_set -Warray-bounds=2"
+  gl_manywarn_set="$gl_manywarn_set -Wformat-overflow=2"
+  gl_manywarn_set="$gl_manywarn_set -Wformat-truncation=2"
+  gl_manywarn_set="$gl_manywarn_set -Wimplicit-fallthrough=5"
+  gl_manywarn_set="$gl_manywarn_set -Wnormalized=nfc"
+  gl_manywarn_set="$gl_manywarn_set -Wshift-overflow=2"
+  gl_manywarn_set="$gl_manywarn_set -Wstringop-overflow=2"
+  gl_manywarn_set="$gl_manywarn_set -Wunused-const-variable=2"
+  gl_manywarn_set="$gl_manywarn_set -Wvla-larger-than=4031"
+
+  # These are needed for older GCC versions.
+  if test -n "$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"
@@ -219,4 +317,13 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC],
   fi
 
   $1=$gl_manywarn_set
+
+  AC_LANG_POP([C])
+])
+
+# Specialization for _AC_LANG = C++.
+# Use of m4_defun rather than AC_DEFUN works around a bug in autoconf < 2.63b.
+m4_defun([gl_MANYWARN_ALL_GCC(C++)],
+[
+  gl_MANYWARN_ALL_GCC_CXX_IMPL([$1])
 ])