f3b76ac8e3
If you specified options in an environment variable containing a blank at the end, then this would not compare equal to the other candidate, which was stripped, causing the first added argument to drop out! This is usually the flag for C++11 compliance, causing binary incompatibility
62 lines
2.1 KiB
CMake
62 lines
2.1 KiB
CMake
# - Add options without repeating them on the command line
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#
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# Synopsis:
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#
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# add_options (lang build opts)
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#
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# where:
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#
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# lang Name of the language whose compiler should receive the
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# options, e.g. CXX. If a comma-separated list is received
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# then the option is added for all those languages. Use the
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# special value ALL_LANGUAGES for these languages: CXX, C
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# and Fortran
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#
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# build Kind of build to which this options should apply,
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# such as DEBUG and RELEASE. This can also be a comma-
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# separated list. Use the special value ALL_BUILDS to apply
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# to all builds.
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#
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# opts List of options to add. Each should be quoted.
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#
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# Example:
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#
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# add_options (CXX RELEASE "-O3" "-DNDEBUG" "-Wall")
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function (add_options langs builds)
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# special handling of empty language specification
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if ("${langs}" STREQUAL "ALL_LANGUAGES")
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set (langs CXX C Fortran)
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endif ("${langs}" STREQUAL "ALL_LANGUAGES")
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foreach (lang IN LISTS langs)
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# prepend underscore if necessary
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foreach (build IN LISTS builds)
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if (NOT ("${build}" STREQUAL "ALL_BUILDS"))
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set (_bld "_${build}")
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string (TOUPPER "${_bld}" _bld)
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else (NOT ("${build}" STREQUAL "ALL_BUILDS"))
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set (_bld "")
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endif (NOT ("${build}" STREQUAL "ALL_BUILDS"))
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foreach (_opt IN LISTS ARGN)
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set (_var "CMAKE_${lang}_FLAGS${_bld}")
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#message (STATUS "Adding \"${_opt}\" to \${${_var}}")
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# remove it first
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string (REPLACE "${_opt}" "" _without "${${_var}}")
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string (STRIP "${_without}" _without)
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# we need to strip this one as well, so they are comparable
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string (STRIP "${${_var}}" _stripped)
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# if it wasn't there, then add it at the end
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if ("${_without}" STREQUAL "${_stripped}")
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# don't add any extra spaces if no options yet are set
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if (NOT ${_stripped} STREQUAL "")
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set (${_var} "${_stripped} ${_opt}")
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else (NOT ${_stripped} STREQUAL "")
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set (${_var} "${_opt}")
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endif (NOT ${_stripped} STREQUAL "")
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set (${_var} "${${_var}}" PARENT_SCOPE)
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endif ("${_without}" STREQUAL "${_stripped}")
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endforeach (_opt)
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endforeach (build)
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endforeach (lang)
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endfunction (add_options lang build)
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