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bpo-33012: Add -Wno-cast-function-type for gcc 8. (GH-6757) 

(cherry picked from commit ef91ddeae7)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
This commit is contained in:
Miss Islington (bot) 2018-05-25 04:02:54 -07:00 committed by GitHub
parent 749afe81ec
commit 20b797dafa
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3 changed files with 63 additions and 0 deletions
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2
Misc/NEWS.d/next/Build/2018-05-10-21-10-01.bpo-33012.5Zfjac.rst Normal file
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@ -0,0 +1,2 @@
Add ``-Wno-cast-function-type`` for gcc 8 for silencing warnings about
function casts like casting to PyCFunction in method definition lists.

41
configure vendored
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@ -7186,6 +7186,47 @@ $as_echo "$ac_cv_disable_missing_field_initializers" >&6; }
CFLAGS_NODIST="$CFLAGS_NODIST -Wno-missing-field-initializers"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if we can turn off $CC invalid function cast warning" >&5
$as_echo_n "checking if we can turn off $CC invalid function cast warning... " >&6; }
ac_save_cc="$CC"
CC="$CC -Wcast-function-type -Werror"
if ${ac_cv_disable_cast_function_type+:} 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 "$LINENO"; then :
ac_cv_disable_cast_function_type=yes
else
ac_cv_disable_cast_function_type=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
fi
CC="$ac_save_cc"
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_disable_cast_function_type" >&5
$as_echo "$ac_cv_disable_cast_function_type" >&6; }
if test $ac_cv_disable_cast_function_type = yes
then
CFLAGS_NODIST="$CFLAGS_NODIST -Wno-cast-function-type"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if we can turn on $CC mixed sign comparison warning" >&5
$as_echo_n "checking if we can turn on $CC mixed sign comparison warning... " >&6; }
ac_save_cc="$CC"

20
configure.ac
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@ -1666,6 +1666,26 @@ yes)
CFLAGS_NODIST="$CFLAGS_NODIST -Wno-missing-field-initializers"
fi
AC_MSG_CHECKING(if we can turn off $CC invalid function cast warning)
ac_save_cc="$CC"
CC="$CC -Wcast-function-type -Werror"
AC_CACHE_VAL(ac_cv_disable_cast_function_type,
AC_COMPILE_IFELSE(
[
AC_LANG_PROGRAM([[]], [[]])
],[
ac_cv_disable_cast_function_type=yes
],[
ac_cv_disable_cast_function_type=no
]))
CC="$ac_save_cc"
AC_MSG_RESULT($ac_cv_disable_cast_function_type)
if test $ac_cv_disable_cast_function_type = yes
then
CFLAGS_NODIST="$CFLAGS_NODIST -Wno-cast-function-type"
fi
AC_MSG_CHECKING(if we can turn on $CC mixed sign comparison warning)
ac_save_cc="$CC"
CC="$CC -Wsign-compare"