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|
dnl
dnl Enable all known GCC compiler warnings, except for those
dnl we can't yet cope with
dnl
AC_DEFUN([SPICE_COMPILE_WARNINGS],[
dnl ******************************
dnl More compiler warnings
dnl ******************************
AC_ARG_ENABLE([werror],
AS_HELP_STRING([--enable-werror], [Use -Werror (if supported)]),
[set_werror="$enableval"],
[if test -d $srcdir/.git; then
is_git_version=true
set_werror=yes
else
set_werror=no
fi])
# List of warnings that are not relevant / wanted
# Don't care about C++ compiler compat
dontwarn="$dontwarn -Wc++-compat"
dontwarn="$dontwarn -Wabi"
dontwarn="$dontwarn -Wdeprecated"
# Don't care about ancient C standard compat
dontwarn="$dontwarn -Wtraditional"
# Don't care about ancient C standard compat
dontwarn="$dontwarn -Wtraditional-conversion"
# Ignore warnings in /usr/include
dontwarn="$dontwarn -Wsystem-headers"
# Happy for compiler to add struct padding
dontwarn="$dontwarn -Wpadded"
# GCC very confused with -O2
dontwarn="$dontwarn -Wunreachable-code"
dontwarn="$dontwarn -Wconversion"
dontwarn="$dontwarn -Wsign-conversion"
dontwarn="$dontwarn -Wvla"
dontwarn="$dontwarn -Wundef"
dontwarn="$dontwarn -Wcast-qual"
dontwarn="$dontwarn -Wlong-long"
dontwarn="$dontwarn -Wswitch-default"
dontwarn="$dontwarn -Wswitch-enum"
dontwarn="$dontwarn -Wstrict-overflow"
dontwarn="$dontwarn -Wunsafe-loop-optimizations"
dontwarn="$dontwarn -Wformat-nonliteral"
dontwarn="$dontwarn -Wfloat-equal"
dontwarn="$dontwarn -Wdeclaration-after-statement"
dontwarn="$dontwarn -Wcast-qual"
dontwarn="$dontwarn -Wconversion"
dontwarn="$dontwarn -Wsign-conversion"
dontwarn="$dontwarn -Wpacked"
dontwarn="$dontwarn -Wunused-macros"
dontwarn="$dontwarn -Woverlength-strings"
dontwarn="$dontwarn -Wstack-protector"
dontwarn="$dontwarn -Winline"
dontwarn="$dontwarn -Wbad-function-cast"
dontwarn="$dontwarn -Wshadow"
# We want to enable thse, but need to sort out the
# decl mess with gtk/generated_*.c
dontwarn="$dontwarn -Wmissing-prototypes"
dontwarn="$dontwarn -Wmissing-declarations"
# Stuff that C++ won't allow. Turn them back on later
dontwarn="$dontwarn -Waggregate-return"
dontwarn="$dontwarn -Wstrict-prototypes"
dontwarn="$dontwarn -Wold-style-definition"
dontwarn="$dontwarn -Wnested-externs"
dontwarn="$dontwarn -Wformat-zero-length"
dontwarn="$dontwarn -Wpointer-to-int-cast"
dontwarn="$dontwarn -Wjump-misses-init"
# Issues in x11/platform_utils.cpp prevent us turning this on
dontwarn="$dontwarn -Wmissing-format-attribute"
# Get all possible GCC warnings
gl_MANYWARN_ALL_GCC([maybewarn])
# Remove the ones we don't want, blacklisted earlier
gl_MANYWARN_COMPLEMENT([wantwarn], [$maybewarn], [$dontwarn])
# Check for $CC support of each warning
for w in $wantwarn; do
gl_WARN_ADD([$w])
done
# GNULIB uses '-W' (aka -Wextra) which includes a bunch of stuff.
# Unfortunately, this means you can't simply use '-Wsign-compare'
# with gl_MANYWARN_COMPLEMENT
# So we have -W enabled, and then have to explicitly turn off...
gl_WARN_ADD([-Wno-sign-compare])
gl_WARN_ADD([-Wno-unused-parameter])
# We can't enable this due to horrible spice_usb_device_get_description
# signature
gl_WARN_ADD([-Wno-format-nonliteral])
# CEGui headers cause violation of this
gl_WARN_ADD([-Wno-ignored-qualifiers])
# GNULIB turns on -Wformat=2 which implies -Wformat-nonliteral,
# so we need to manually re-exclude it.
gl_WARN_ADD([-Wno-format-nonliteral])
# This should be < 1024 really. pixman_utils is the blackspot
# preventing lower usage
gl_WARN_ADD([-Wframe-larger-than=20460])
# Use improved glibc headers
AH_VERBATIM([FORTIFY_SOURCE],
[/* Enable compile-time and run-time bounds-checking, and some warnings. */
#if !defined _FORTIFY_SOURCE && defined __OPTIMIZE__ && __OPTIMIZE__
# define _FORTIFY_SOURCE 2
#endif
])
# Extra special flags
dnl -fstack-protector stuff passes gl_WARN_ADD with gcc
dnl on Mingw32, but fails when actually used
case $host in
*-*-linux*)
dnl Fedora only uses -fstack-protector, but doesn't seem to
dnl be great overhead in adding -fstack-protector-all instead
dnl gl_WARN_ADD([-fstack-protector])
gl_WARN_ADD([-fstack-protector-all])
gl_WARN_ADD([--param=ssp-buffer-size=4])
;;
esac
gl_WARN_ADD([-fexceptions])
gl_WARN_ADD([-fasynchronous-unwind-tables])
gl_WARN_ADD([-fdiagnostics-show-option])
gl_WARN_ADD([-funit-at-a-time])
# Need -fipa-pure-const in order to make -Wsuggest-attribute=pure
# fire even without -O.
gl_WARN_ADD([-fipa-pure-const])
# We should eventually enable this, but right now there are at
# least 75 functions triggering warnings.
gl_WARN_ADD([-Wno-suggest-attribute=pure])
gl_WARN_ADD([-Wno-suggest-attribute=const])
if test "$set_werror" = "yes"
then
gl_WARN_ADD([-Werror])
fi
WARN_CXXFLAGS=$WARN_CFLAGS
AC_SUBST([WARN_CXXFLAGS])
# These are C-only warnings
if test "x$enable_tunnel" != "xyes"; then
# Slirp causes pain :-(
gl_WARN_ADD([-Waggregate-return])
fi
gl_WARN_ADD([-Wstrict-prototypes])
gl_WARN_ADD([-Wold-style-definition])
gl_WARN_ADD([-Wnested-externs])
gl_WARN_ADD([-Wformat-zero-length])
gl_WARN_ADD([-Wpointer-to-int-cast])
gl_WARN_ADD([-Wjump-misses-init])
WARN_LDFLAGS=$WARN_CFLAGS
AC_SUBST([WARN_CFLAGS])
AC_SUBST([WARN_LDFLAGS])
])
|
