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# CMake build for xerces-c
#
# Written by Roger Leigh <rleigh@codelibre.net>
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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.
# compiler warnings
# These are annoyingly verbose, produce false positives or don't work
# nicely with all supported compiler versions, so are disabled unless
# explicitly enabled.
option(extra-warnings "Enable extra compiler warnings" OFF)
# This will cause the compiler to fail when an error occurs.
option(fatal-warnings "Compiler warnings are errors" OFF)
# Check if the compiler supports each of the following additional
# flags, and enable them if supported. This greatly improves the
# quality of the build by checking for a number of common problems,
# some of which are quite serious.
if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR
CMAKE_CXX_COMPILER_ID MATCHES "Clang")
set(test_flags
-Wall
-Wcast-align
-Wcast-qual
-Wctor-dtor-privacy
-Wextra
-Wformat=2
-Wimplicit-atomic-properties
-Wmissing-declarations
-Wno-long-long
-Woverlength-strings
-Woverloaded-virtual
-Wredundant-decls
-Wreorder
-Wswitch-default
-Wunused-variable
-Wwrite-strings
-Wno-variadic-macros
-fstrict-aliasing)
if(extra-warnings)
list(APPEND test_flags
-Wfloat-equal
-Wmissing-prototypes
-Wunreachable-code)
endif()
if(fatal-warnings)
list(APPEND test_flags
-Werror)
endif()
elseif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
set(test_flags)
if(extra-warnings)
list(APPEND test_flags
/W4)
else()
list(APPEND test_flags
/W3)
endif()
if (fatal-warnings)
list(APPEND test_flags
/WX)
endif()
endif()
include(CheckCXXCompilerFlag)
foreach(flag ${test_flags})
string(REGEX REPLACE "[^A-Za-z0-9]" "_" flag_var "${flag}")
set(test_c_flag "CXX_FLAG${flag_var}")
CHECK_CXX_COMPILER_FLAG(${flag} "${test_c_flag}")
if (${test_c_flag})
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}")
endif (${test_c_flag})
endforeach(flag ${test_flags})
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