blob: 85032ab7a75f75178915c2565212fa16e89ee997 [file] [log] [blame]
#
# Copyright 2015-2016 Nest Labs Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#
# Description:
# This file defines a GNU autoconf M4-style macro that adds an
# --enable-warnings-as-errors configuration option to the package
# and controls whether the package will be built to treat all
# compilation warnings as errors. #
#
# NL_ENABLE_WERROR(default)
#
# default - Whether the option should be enabled (yes) or disabled (no)
# by default.
#
# Adds an --enable-warnings-as-errors configuration option to the
# package with a default value of 'default' (should be either 'no' or
# 'yes') and controls whether the package will be built with or
# without -Werror enabled.
#
# The value 'nl_cv_warnings_as_errors' will be set to the result. In
# addition, the variable NL_WERROR_CPPFLAGS will be set to the
# compiler-specific flag necessary to assert this option.
#
#------------------------------------------------------------------------------
AC_DEFUN([NL_ENABLE_WERROR],
[
# Check whether or not a default value has been passed in.
m4_case([$1],
[yes],[],
[no],[],
[m4_fatal([$0: invalid default value '$1'; must be 'yes' or 'no'])])
AC_CACHE_CHECK([whether to treat all compilation warnings as errors],
nl_cv_warnings_as_errors,
[
AC_ARG_ENABLE(warnings-as-errors,
[AS_HELP_STRING([--enable-warnings-as-errors],[Treat all compilation warnings as errors @<:@default=$1@:>@.])],
[
case "${enableval}" in
no|yes)
nl_cv_warnings_as_errors=${enableval}
;;
*)
AC_MSG_ERROR([Invalid value ${enableval} for --enable-warnings-as-errors])
;;
esac
],
[
nl_cv_warnings_as_errors=$1
])
])
if test "${nl_cv_warnings_as_errors}" = "yes"; then
AX_CHECK_COMPILER_OPTION([C], NL_WERROR_CPPFLAGS, [-Werror])
if test "x${NL_WERROR_CPPFLAGS}" = "x"; then
AC_MSG_ERROR([Could not determine how to treat warnings as errors for your compiler ${CC}])
fi
fi
])