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CMakeBasics.cmake
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CMakeBasics.cmake
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###############################################################################
# Copyright (c) 2014-2015, Lawrence Livermore National Security, LLC.
#
# Produced at the Lawrence Livermore National Laboratory
#
# LLNL-CODE-666778
#
# All rights reserved.
#
# This file is part of Conduit.
#
# For details, see: http://llnl.github.io/conduit/.
#
# Please also read conduit/LICENSE
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the disclaimer below.
#
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the disclaimer (as noted below) in the
# documentation and/or other materials provided with the distribution.
#
# * Neither the name of the LLNS/LLNL nor the names of its contributors may
# be used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL LAWRENCE LIVERMORE NATIONAL SECURITY,
# LLC, THE U.S. DEPARTMENT OF ENERGY OR CONTRIBUTORS BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
# IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
###############################################################################
################################
# Standard CMake Options
################################
# Fail if someone tries to config an in-source build.
if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
message(FATAL_ERROR "In-source builds are not supported. Please remove CMakeCache.txt from the 'src' dir and configure an out-of-source build in another directory.")
endif()
# enable creation of compile_commands.json
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
# always use position independent code
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
macro(ENABLE_WARNINGS)
# set the warning levels we want to abide by
if(CMAKE_BUILD_TOOL MATCHES "(msdev|devenv|nmake)")
add_definitions(/W2)
else()
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR
"${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR
"${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
# use these flags for clang, gcc, or icc
add_definitions(-Wall -Wextra)
endif()
endif()
endmacro()
################################
# Shared vs Static Libs
################################
if(BUILD_SHARED_LIBS)
message(STATUS "Building shared libraries (BUILD_SHARED_LIBS == ON)")
else()
message(STATUS "Building static libraries (BUILD_SHARED_LIBS == OFF)")
endif()
################################
# Coverage Flags
################################
if(ENABLE_COVERAGE)
message(STATUS "Building using coverage flags (ENABLE_COVERAGE == ON)")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} --coverage")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --coverage")
else()
message(STATUS "Building without coverage flags (ENABLE_COVERAGE == OFF)")
endif()
################################
# RPath Settings
################################
# use, i.e. don't skip the full RPATH for the build tree
SET(CMAKE_SKIP_BUILD_RPATH FALSE)
# when building, don't use the install RPATH already
# (but later on when installing)
set(CMAKE_BUILD_WITH_INSTALL_RPATH FALSE)
set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
set(CMAKE_INSTALL_NAME_DIR "${CMAKE_INSTALL_PREFIX}/lib")
# add the automatically determined parts of the RPATH
# which point to directories outside the build tree to the install RPATH
set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
# the RPATH to be used when installing, but only if it's not a system directory
list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_PREFIX}/lib" isSystemDir)
if("${isSystemDir}" STREQUAL "-1")
set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
endif()
################################
# Standard CTest Options
################################
if(ENABLE_TESTS)
include(CTest)
endif()
######################################################################################
# Provide macros to simplify adding compile and link flags to a target
######################################################################################
macro(add_target_compile_flags)
set(options)
set(singleValuedArgs TARGET FLAGS)
set(multiValuedArgs)
## parse the arguments to the macro
cmake_parse_arguments(args
"${options}" "${singleValuedArgs}" "${multiValuedArgs}" ${ARGN} )
if(NOT "${args_FLAGS}" STREQUAL "")
# get prev flags
get_target_property(_COMP_FLAGS ${args_TARGET} COMPILE_FLAGS)
if(NOT _COMP_FLAGS)
set(_COMP_FLAGS "")
endif()
# append new flags
set(_COMP_FLAGS "${args_FLAGS} ${_COMP_FLAGS}")
set_target_properties(${args_TARGET} PROPERTIES COMPILE_FLAGS "${_COMP_FLAGS}" )
endif()
endmacro()
macro(add_target_link_flags)
set(options)
set(singleValuedArgs TARGET FLAGS)
set(multiValuedArgs)
## parse the arguments to the macro
cmake_parse_arguments(args
"${options}" "${singleValuedArgs}" "${multiValuedArgs}" ${ARGN} )
if(NOT "${args_FLAGS}" STREQUAL "")
# get prev flags
get_target_property(_LINK_FLAGS ${args_TARGET} LINK_FLAGS)
if(NOT _LINK_FLAGS)
set(_LINK_FLAGS "")
endif()
# append new flag
set(_LINK_FLAGS "${args_FLAGS} ${_LINK_FLAGS}")
set_target_properties(${args_TARGET} PROPERTIES LINK_FLAGS "${_LINK_FLAGS}" )
endif()
endmacro()