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# SPDX-FileCopyrightInfo: Copyright © DUNE Project contributors, see file LICENSE.md in module root
# SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
# check whether the user wants to overload compile flags upon calling make
#
# Provides the following macros:
#
# initialize_compiler_script() : needs to be called before further flags are added to CMAKE_CXX_FLAGS
# finalize_compiler_script() : needs to be called at the end of the cmake macros, e.g. in finalize_dune_project
#
# Those two macro calls are hooked into dune_project/finalize_dune_project.
#
# .. cmake_variable:: ALLOW_CXXFLAGS_OVERWRITE
#
# Setting this option will allow you to overload preprocessor definitions from
# the command line, as it was possible naturally with the autotools build system.
# This feature only works with a :code:`Unix Makefiles` based generator. You can
# use it as:
#
# :code:`make CXXFLAGS="your flags" GRIDTYPE="grid type"`
#
# :code:`GRIDTYPE` can be anything defined in :code:`config.h` via the :ref:`dune_define_gridtype` macro from dune-grid.
# Furthermore any CPP variable of the form :code:`-DVAR=VALUE` can be overloaded on the command line.
#
# .. note::
# If you don't know what this is or what it's good for, don't use it.
#
include_guard(GLOBAL)
option(ALLOW_CXXFLAGS_OVERWRITE OFF)
option(ALLOW_CFLAGS_OVERWRITE OFF)
# init compiler script and store CXX flags
macro(initialize_compiler_script)
if(ALLOW_CXXFLAGS_OVERWRITE OR ALLOW_CFLAGS_OVERWRITE)
message(WARNING "ALLOW_CXXFLAGS_OVERWRITE is not longer included in the cmake build process (see MR 1251 in dune-common for details). Use dune-common/bin/compiler_launcher.sh instead! A description of usage is found there.")
endif()
endmacro()
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