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Issue #23545: Turn on extra warnings on GCC.

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This commit is contained in:
Serhiy Storchaka 2016-09-11 21:56:32 +03:00
parent 81b08a8217
commit ea80ffb851
2 changed files with 185 additions and 0 deletions
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124
configure vendored
View file

@ -6920,6 +6920,47 @@ case $GCC in
yes)
CFLAGS_NODIST="$CFLAGS_NODIST -std=c99"
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for -Wextra" >&5
$as_echo_n "checking for -Wextra... " >&6; }
ac_save_cc="$CC"
CC="$CC -Wextra -Werror"
if ${ac_cv_extra_warnings+:} false; then :
$as_echo_n "(cached) " >&6
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main ()
{
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ac_cv_extra_warnings=yes
else
ac_cv_extra_warnings=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
fi
CC="$ac_save_cc"
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_extra_warnings" >&5
$as_echo "$ac_cv_extra_warnings" >&6; }
if test $ac_cv_extra_warnings = yes
then
CFLAGS_NODIST="$CFLAGS_NODIST -Wextra"
fi
# Python doesn't violate C99 aliasing rules, but older versions of
# GCC produce warnings for legal Python code. Enable
# -fno-strict-aliasing on versions of GCC that support but produce
@ -7040,6 +7081,89 @@ $as_echo "$ac_cv_disable_unused_result_warning" >&6; }
if test $ac_cv_disable_unused_result_warning = yes
then
BASECFLAGS="$BASECFLAGS -Wno-unused-result"
CFLAGS_NODIST="$CFLAGS_NODIST -Wno-unused-result"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if we can turn off $CC unused parameter warning" >&5
$as_echo_n "checking if we can turn off $CC unused parameter warning... " >&6; }
ac_save_cc="$CC"
CC="$CC -Wunused-parameter -Werror"
if ${ac_cv_disable_unused_parameter_warning+:} false; then :
$as_echo_n "(cached) " >&6
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main ()
{
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ac_cv_disable_unused_parameter_warning=yes
else
ac_cv_disable_unused_parameter_warning=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
fi
CC="$ac_save_cc"
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_disable_unused_parameter_warning" >&5
$as_echo "$ac_cv_disable_unused_parameter_warning" >&6; }
if test $ac_cv_disable_unused_parameter_warning = yes
then
CFLAGS_NODIST="$CFLAGS_NODIST -Wno-unused-parameter"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if we can turn off $CC missing field initializers warning" >&5
$as_echo_n "checking if we can turn off $CC missing field initializers warning... " >&6; }
ac_save_cc="$CC"
CC="$CC -Wmissing-field-initializers -Werror"
if ${ac_cv_disable_missing_field_initializers+:} false; then :
$as_echo_n "(cached) " >&6
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main ()
{
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ac_cv_disable_missing_field_initializers=yes
else
ac_cv_disable_missing_field_initializers=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
fi
CC="$ac_save_cc"
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_disable_missing_field_initializers" >&5
$as_echo "$ac_cv_disable_missing_field_initializers" >&6; }
if test $ac_cv_disable_missing_field_initializers = yes
then
CFLAGS_NODIST="$CFLAGS_NODIST -Wno-missing-field-initializers"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if we can turn on $CC mixed sign comparison warning" >&5

61
configure.ac
View file

@ -1517,6 +1517,26 @@ case $GCC in
yes)
CFLAGS_NODIST="$CFLAGS_NODIST -std=c99"
AC_MSG_CHECKING(for -Wextra)
ac_save_cc="$CC"
CC="$CC -Wextra -Werror"
AC_CACHE_VAL(ac_cv_extra_warnings,
AC_COMPILE_IFELSE(
[
AC_LANG_PROGRAM([[]], [[]])
],[
ac_cv_extra_warnings=yes
],[
ac_cv_extra_warnings=no
]))
CC="$ac_save_cc"
AC_MSG_RESULT($ac_cv_extra_warnings)
if test $ac_cv_extra_warnings = yes
then
CFLAGS_NODIST="$CFLAGS_NODIST -Wextra"
fi
# Python doesn't violate C99 aliasing rules, but older versions of
# GCC produce warnings for legal Python code. Enable
# -fno-strict-aliasing on versions of GCC that support but produce
@ -1581,6 +1601,47 @@ yes)
if test $ac_cv_disable_unused_result_warning = yes
then
BASECFLAGS="$BASECFLAGS -Wno-unused-result"
CFLAGS_NODIST="$CFLAGS_NODIST -Wno-unused-result"
fi
AC_MSG_CHECKING(if we can turn off $CC unused parameter warning)
ac_save_cc="$CC"
CC="$CC -Wunused-parameter -Werror"
AC_CACHE_VAL(ac_cv_disable_unused_parameter_warning,
AC_COMPILE_IFELSE(
[
AC_LANG_PROGRAM([[]], [[]])
],[
ac_cv_disable_unused_parameter_warning=yes
],[
ac_cv_disable_unused_parameter_warning=no
]))
CC="$ac_save_cc"
AC_MSG_RESULT($ac_cv_disable_unused_parameter_warning)
if test $ac_cv_disable_unused_parameter_warning = yes
then
CFLAGS_NODIST="$CFLAGS_NODIST -Wno-unused-parameter"
fi
AC_MSG_CHECKING(if we can turn off $CC missing field initializers warning)
ac_save_cc="$CC"
CC="$CC -Wmissing-field-initializers -Werror"
AC_CACHE_VAL(ac_cv_disable_missing_field_initializers,
AC_COMPILE_IFELSE(
[
AC_LANG_PROGRAM([[]], [[]])
],[
ac_cv_disable_missing_field_initializers=yes
],[
ac_cv_disable_missing_field_initializers=no
]))
CC="$ac_save_cc"
AC_MSG_RESULT($ac_cv_disable_missing_field_initializers)
if test $ac_cv_disable_missing_field_initializers = yes
then
CFLAGS_NODIST="$CFLAGS_NODIST -Wno-missing-field-initializers"
fi
AC_MSG_CHECKING(if we can turn on $CC mixed sign comparison warning)