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Add -Wvla and -Walloca to --enable-warnings

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This commit is contained in:
Todd C. Miller
2022-11-15 11:05:42 -07:00
parent 3ecfa025b8
commit bef72f76f6
2 changed files with 117 additions and 0 deletions
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114
configure vendored
View File

@@ -32294,6 +32294,120 @@ else $as_nop
:
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wvla" >&5
printf %s "checking whether C compiler accepts -Wvla... " >&6; }
if test ${ax_cv_check_cflags___Wvla+y}
then :
printf %s "(cached) " >&6
else $as_nop
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Wvla"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main (void)
{
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"
then :
ax_cv_check_cflags___Wvla=yes
else $as_nop
ax_cv_check_cflags___Wvla=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags___Wvla" >&5
printf "%s\n" "$ax_cv_check_cflags___Wvla" >&6; }
if test x"$ax_cv_check_cflags___Wvla" = xyes
then :
CFLAGS="$CFLAGS -Wvla"
else $as_nop
:
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Walloca" >&5
printf %s "checking whether C compiler accepts -Walloca... " >&6; }
if test ${ax_cv_check_cflags___Walloca+y}
then :
printf %s "(cached) " >&6
else $as_nop
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Walloca"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main (void)
{
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"
then :
ax_cv_check_cflags___Walloca=yes
else $as_nop
ax_cv_check_cflags___Walloca=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags___Walloca" >&5
printf "%s\n" "$ax_cv_check_cflags___Walloca" >&6; }
if test x"$ax_cv_check_cflags___Walloca" = xyes
then :
CFLAGS="$CFLAGS -Walloca"
else $as_nop
:
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wtrampolines" >&5
printf %s "checking whether C compiler accepts -Wtrampolines... " >&6; }
if test ${ax_cv_check_cflags___Wtrampolines+y}
then :
printf %s "(cached) " >&6
else $as_nop
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Wtrampolines"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main (void)
{
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"
then :
ax_cv_check_cflags___Wtrampolines=yes
else $as_nop
ax_cv_check_cflags___Wtrampolines=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags___Wtrampolines" >&5
printf "%s\n" "$ax_cv_check_cflags___Wtrampolines" >&6; }
if test x"$ax_cv_check_cflags___Wtrampolines" = xyes
then :
CFLAGS="$CFLAGS -Wtrampolines"
else $as_nop
:
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC supports the fallthrough attribute" >&5
printf %s "checking whether $CC supports the fallthrough attribute... " >&6; }
if test ${sudo_cv_var_fallthrough_attribute+y}

3
configure.ac
View File

@@ -5025,6 +5025,9 @@ if test -n "$GCC"; then
dnl
CFLAGS="${CFLAGS} -Wall -Wsign-compare -Wpointer-arith -Wno-unknown-pragmas -Wmissing-prototypes -Wwrite-strings"
AX_CHECK_COMPILE_FLAG([-Wshadow], [CFLAGS="$CFLAGS -Wshadow"])
AX_CHECK_COMPILE_FLAG([-Wvla], [CFLAGS="$CFLAGS -Wvla"])
AX_CHECK_COMPILE_FLAG([-Walloca], [CFLAGS="$CFLAGS -Walloca"])
AX_CHECK_COMPILE_FLAG([-Wtrampolines], [CFLAGS="$CFLAGS -Wtrampolines"])
dnl
dnl The fallthrough attribute is supported by gcc 7.0 and clang 10.
dnl This test relies on AC_LANG_WERROR.