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Import CMake support from OPM-Core

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Bård Skaflestad
2013-05-15 10:24:52 +02:00
parent 930b88334f
commit 116f39e8ab
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82
cmake/Modules/AddOptions.cmake Normal file
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# - Add options without repeating them on the command line
#
# Synopsis:
#
# add_options (lang build opts)
#
# where:
#
# lang Name of the language whose compiler should receive the
# options, e.g. CXX. If a comma-separated list is received
# then the option is added for all those languages. Use the
# special value ALL_LANGUAGES for these languages: CXX, C
# and Fortran
#
# build Kind of build to which this options should apply,
# such as DEBUG and RELEASE. This can also be a comma-
# separated list. Use the special value ALL_BUILDS to apply
# to all builds.
#
# opts List of options to add. Each should be quoted.
#
# Example:
#
# add_options (CXX RELEASE "-O3" "-DNDEBUG" "-Wall")
function (add_options langs builds)
# special handling of empty language specification
if ("${langs}" STREQUAL "ALL_LANGUAGES")
set (langs CXX C Fortran)
endif ("${langs}" STREQUAL "ALL_LANGUAGES")
foreach (lang IN LISTS langs)
# prepend underscore if necessary
foreach (build IN LISTS builds)
if (NOT ("${build}" STREQUAL "ALL_BUILDS"))
set (_bld "_${build}")
string (TOUPPER "${_bld}" _bld)
else (NOT ("${build}" STREQUAL "ALL_BUILDS"))
set (_bld "")
endif (NOT ("${build}" STREQUAL "ALL_BUILDS"))
foreach (_opt IN LISTS ARGN)
set (_var "CMAKE_${lang}_FLAGS${_bld}")
#message (STATUS "Adding \"${_opt}\" to \${${_var}}")
# remove it first
string (REPLACE "${_opt}" "" _without "${${_var}}")
string (STRIP "${_without}" _without)
# we need to strip this one as well, so they are comparable
string (STRIP "${${_var}}" _stripped)
# if it wasn't there, then add it at the end
if ("${_without}" STREQUAL "${_stripped}")
# don't add any extra spaces if no options yet are set
if (NOT ${_stripped} STREQUAL "")
set (${_var} "${_stripped} ${_opt}")
else (NOT ${_stripped} STREQUAL "")
set (${_var} "${_opt}")
endif (NOT ${_stripped} STREQUAL "")
set (${_var} "${${_var}}" PARENT_SCOPE)
endif ("${_without}" STREQUAL "${_stripped}")
endforeach (_opt)
endforeach (build)
endforeach (lang)
endfunction (add_options lang build)
# set varname to flag unless user has specified something that matches regex
function (set_default_option varname flag regex)
if (NOT "$ENV{CXXFLAGS}" MATCHES "${regex}"
AND NOT "${CMAKE_CXX_FLAGS}" MATCHES "${regex}"
AND NOT "${CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}}" MATCHES "${regex}")
set (${varname} ${flag} PARENT_SCOPE)
else (NOT "$ENV{CXXFLAGS}" MATCHES "${regex}"
AND NOT "${CMAKE_CXX_FLAGS}" MATCHES "${regex}"
AND NOT "${CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}}" MATCHES "${regex}")
set (${varname} PARENT_SCOPE)
endif (NOT "$ENV{CXXFLAGS}" MATCHES "${regex}"
AND NOT "${CMAKE_CXX_FLAGS}" MATCHES "${regex}"
AND NOT "${CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}}" MATCHES "${regex}")
endfunction (set_default_option)
# note: this must be called before project()
macro (no_default_options)
# prevent the platform probe to set options
set (CMAKE_NOT_USING_CONFIG_FLAGS TRUE)
endmacro (no_default_options)