-# manywarnings.m4 serial 6
+# manywarnings.m4 serial 7
dnl Copyright (C) 2008-2014 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
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 $1}' ../build-aux/gcc-warning.spec))
+
gl_manywarn_set=
for gl_manywarn_item in \
-W \
-Wcomments \
-Wcoverage-mismatch \
-Wcpp \
+ -Wdate-time \
-Wdeprecated \
-Wdeprecated-declarations \
-Wdisabled-optimization \
-Wnarrowing \
-Wnested-externs \
-Wnonnull \
- -Wnormalized=nfc \
-Wold-style-declaration \
-Wold-style-definition \
+ -Wopenmp-simd \
-Woverflow \
-Woverlength-strings \
-Woverride-init \
-Wvla \
-Wvolatile-register-var \
-Wwrite-strings \
- -fdiagnostics-show-option \
- -funit-at-a-time \
\
; do
gl_manywarn_set="$gl_manywarn_set $gl_manywarn_item"
done
+ # gcc --help=warnings outputs an unusual form for this option; list
+ # it here so that the above 'comm' command doesn't report a false match.
+ gl_manywarn_set="$gl_manywarn_set -Wnormalized=nfc"
+
+ # 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"