-# manywarnings.m4 serial 1
-dnl Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
+# manywarnings.m4 serial 4
+dnl Copyright (C) 2008-2012 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.
# gl_MANYWARN_ALL_GCC(VARIABLE)
# -----------------------------
-# Add all documented GCC (currently as per version 4.4) 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.
+# 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.
AC_DEFUN([gl_MANYWARN_ALL_GCC],
[
- gl_manywarn_set=
- for gl_manywarn_item in \
- -Wall \
- -W \
- -Wformat-y2k \
- -Wformat-nonliteral \
- -Wformat-security \
- -Winit-self \
- -Wmissing-include-dirs \
- -Wswitch-default \
- -Wswitch-enum \
- -Wunused \
- -Wunknown-pragmas \
- -Wstrict-aliasing \
- -Wstrict-overflow \
- -Wsystem-headers \
- -Wfloat-equal \
- -Wtraditional \
- -Wtraditional-conversion \
- -Wdeclaration-after-statement \
- -Wundef \
- -Wshadow \
- -Wunsafe-loop-optimizations \
- -Wpointer-arith \
- -Wbad-function-cast \
- -Wc++-compat \
- -Wcast-qual \
- -Wcast-align \
- -Wwrite-strings \
- -Wconversion \
- -Wsign-conversion \
- -Wlogical-op \
- -Waggregate-return \
- -Wstrict-prototypes \
- -Wold-style-definition \
- -Wmissing-prototypes \
- -Wmissing-declarations \
- -Wmissing-noreturn \
- -Wmissing-format-attribute \
- -Wpacked \
- -Wpadded \
- -Wredundant-decls \
- -Wnested-externs \
- -Wunreachable-code \
- -Winline \
- -Winvalid-pch \
- -Wlong-long \
- -Wvla \
- -Wvolatile-register-var \
- -Wdisabled-optimization \
- -Wstack-protector \
- -Woverlength-strings \
- -Wbuiltin-macro-redefined \
- -Wmudflap \
- -Wpacked-bitfield-compat \
- -Wsync-nand \
- ; do
+ dnl First, check if -Wno-missing-field-initializers is needed.
+ dnl -Wmissing-field-initializers is implied by -W, but that issues
+ dnl warnings with GCC version before 4.7, for the common idiom
+ dnl of initializing types on the stack to zero, using { 0, }
+ AC_REQUIRE([AC_PROG_CC])
+ if test -n "$GCC"; then
+
+ dnl First, check -W -Werror -Wno-missing-field-initializers is supported
+ dnl with the current $CC $CFLAGS $CPPFLAGS.
+ AC_MSG_CHECKING([whether -Wno-missing-field-initializers is supported])
+ AC_CACHE_VAL([gl_cv_cc_nomfi_supported], [
+ gl_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -W -Werror -Wno-missing-field-initializers"
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([[]], [[]])],
+ [gl_cv_cc_nomfi_supported=yes],
+ [gl_cv_cc_nomfi_supported=no])
+ CFLAGS="$gl_save_CFLAGS"])
+ AC_MSG_RESULT([$gl_cv_cc_nomfi_supported])
+
+ if test "$gl_cv_cc_nomfi_supported" = yes; then
+ dnl Now check whether -Wno-missing-field-initializers is needed
+ dnl for the { 0, } construct.
+ AC_MSG_CHECKING([whether -Wno-missing-field-initializers is needed])
+ AC_CACHE_VAL([gl_cv_cc_nomfi_needed], [
+ gl_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -W -Werror"
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[void f (void)
+ {
+ typedef struct { int a; int b; } s_t;
+ s_t s1 = { 0, };
+ }
+ ]],
+ [[]])],
+ [gl_cv_cc_nomfi_needed=no],
+ [gl_cv_cc_nomfi_needed=yes])
+ CFLAGS="$gl_save_CFLAGS"
+ ])
+ AC_MSG_RESULT([$gl_cv_cc_nomfi_needed])
+ fi
+ fi
+
+ gl_manywarn_set=
+ for gl_manywarn_item in \
+ -Wall \
+ -W \
+ -Wformat-y2k \
+ -Wformat-nonliteral \
+ -Wformat-security \
+ -Winit-self \
+ -Wmissing-include-dirs \
+ -Wswitch-default \
+ -Wswitch-enum \
+ -Wunused \
+ -Wunknown-pragmas \
+ -Wstrict-aliasing \
+ -Wstrict-overflow \
+ -Wsystem-headers \
+ -Wfloat-equal \
+ -Wtraditional \
+ -Wtraditional-conversion \
+ -Wdeclaration-after-statement \
+ -Wundef \
+ -Wshadow \
+ -Wunsafe-loop-optimizations \
+ -Wpointer-arith \
+ -Wbad-function-cast \
+ -Wc++-compat \
+ -Wcast-qual \
+ -Wcast-align \
+ -Wwrite-strings \
+ -Wconversion \
+ -Wsign-conversion \
+ -Wlogical-op \
+ -Waggregate-return \
+ -Wstrict-prototypes \
+ -Wold-style-definition \
+ -Wmissing-prototypes \
+ -Wmissing-declarations \
+ -Wmissing-noreturn \
+ -Wmissing-format-attribute \
+ -Wpacked \
+ -Wpadded \
+ -Wredundant-decls \
+ -Wnested-externs \
+ -Wunreachable-code \
+ -Winline \
+ -Winvalid-pch \
+ -Wlong-long \
+ -Wvla \
+ -Wvolatile-register-var \
+ -Wdisabled-optimization \
+ -Wstack-protector \
+ -Woverlength-strings \
+ -Wbuiltin-macro-redefined \
+ -Wmudflap \
+ -Wpacked-bitfield-compat \
+ -Wsync-nand \
+ ; do
gl_manywarn_set="$gl_manywarn_set $gl_manywarn_item"
done
- # The following are not documented in the manual but are included in
- # output from gcc --help=warnings.
- for gl_manywarn_item in \
- -Wattributes \
- -Wcoverage-mismatch \
- -Wmultichar \
- -Wunused-macros \
- ; do
+ # The following are not documented in the manual but are included in
+ # output from gcc --help=warnings.
+ for gl_manywarn_item in \
+ -Wattributes \
+ -Wcoverage-mismatch \
+ -Wunused-macros \
+ ; do
gl_manywarn_set="$gl_manywarn_set $gl_manywarn_item"
done
+ # More warnings from gcc 4.6.2 --help=warnings.
+ for gl_manywarn_item in \
+ -Wabi \
+ -Wcpp \
+ -Wdeprecated \
+ -Wdeprecated-declarations \
+ -Wdiv-by-zero \
+ -Wdouble-promotion \
+ -Wendif-labels \
+ -Wextra \
+ -Wformat-contains-nul \
+ -Wformat-extra-args \
+ -Wformat-zero-length \
+ -Wformat=2 \
+ -Wmultichar \
+ -Wnormalized=nfc \
+ -Woverflow \
+ -Wpointer-to-int-cast \
+ -Wpragmas \
+ -Wsuggest-attribute=const \
+ -Wsuggest-attribute=noreturn \
+ -Wsuggest-attribute=pure \
+ -Wtrampolines \
+ ; do
+ gl_manywarn_set="$gl_manywarn_set $gl_manywarn_item"
+ done
+
+ # Disable the missing-field-initializers warning if needed
+ if test "$gl_cv_cc_nomfi_needed" = yes; then
+ gl_manywarn_set="$gl_manywarn_set -Wno-missing-field-initializers"
+ fi
+
$1=$gl_manywarn_set
])
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