diff options
Diffstat (limited to 'cmake/scripts/common/AddOptions.cmake')
| -rw-r--r-- | cmake/scripts/common/AddOptions.cmake | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/cmake/scripts/common/AddOptions.cmake b/cmake/scripts/common/AddOptions.cmake new file mode 100644 index 0000000..96837c1 --- /dev/null +++ b/cmake/scripts/common/AddOptions.cmake @@ -0,0 +1,78 @@ +# - 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("${langs}" STREQUAL "ALL_LANGUAGES") + set(langs CXX C Fortran) + endif() + foreach(lang IN LISTS langs) + # prepend underscore if necessary + foreach(build IN LISTS builds) + if(NOT ("${build}" STREQUAL "ALL_BUILDS")) + set(_bld "_${build}") + string(TOUPPER "${_bld}" _bld) + else() + set(_bld "") + endif() + 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} ${_opt}") + else() + set(${_var} "${_opt}") + endif() + set(${_var} "${${_var}}" PARENT_SCOPE) + endif() + endforeach() + endforeach() + endforeach() +endfunction() + +# 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} ${flag} PARENT_SCOPE) + else() + set(${varname} PARENT_SCOPE) + endif() +endfunction() + +# 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() |