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https://github.com/OPM/opm-simulators.git
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b13f9d251b
The operator precedence in CMake can be surprising, so add parenthesis to make in unambigious. Also, make it more explicit from which language we get the default options. (They are all set from the settings given for C++; why would have different optimization options for C and C++?)
65 lines
2.1 KiB
CMake
65 lines
2.1 KiB
CMake
# - Turn on optimizations based on build type
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include(TestCXXAcceptsFlag)
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include (AddOptions)
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include (UseCompVer)
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is_compiler_gcc_compatible ()
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# mapping from profile name (in CMAKE_BUILD_TYPE) to variable part
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set (_prof_DEBUG "Debug")
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set (_prof_RELEASE "Release;RelWithDebInfo;MinSizeRel")
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# if we are building a debug target, then disable all optimizations
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# otherwise, turn them on. indicate to the code what we have done
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# so it can turn on assertions etc.
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if (CXX_COMPAT_GCC)
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# extra flags passed for optimization
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set (_opt_flags "")
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# link-time (a.k.a. global) optimizations
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# disabled due to widespread bugs in the linker plugin
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option (WHOLE_PROG_OPTIM "Whole program optimization (lto)" OFF)
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if (WHOLE_PROG_OPTIM)
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check_cxx_accepts_flag ("-flto" HAVE_LINK_OPTS)
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if (HAVE_LINK_OPTS)
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list (APPEND _opt_flags "-flto")
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endif (HAVE_LINK_OPTS)
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endif (WHOLE_PROG_OPTIM)
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# native instruction set tuning
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option (WITH_NATIVE "Use native instruction set" ON)
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if (WITH_NATIVE)
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check_cxx_accepts_flag ("-mtune=native" HAVE_MTUNE)
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if (HAVE_MTUNE)
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list (APPEND _opt_flags "-mtune=native")
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endif (HAVE_MTUNE)
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endif (WITH_NATIVE)
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# default optimization flags, if not set by user
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set_default_option (CXX _opt_dbg "-O0" "(^|\ )-O")
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set_default_option (CXX _opt_rel "-O3" "(^|\ )-O")
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# use these options for debug builds - no optimizations
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add_options (ALL_LANGUAGES "${_prof_DEBUG}" ${_opt_dbg} "-DDEBUG")
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# use these options for release builds - full optimization
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add_options (ALL_LANGUAGES "${_prof_RELEASE}" ${_opt_rel} "-DNDEBUG" ${_opt_flags})
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else ()
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# default information from system
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foreach (lang IN ITEMS C CXX Fortran)
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if (lang STREQUAL "Fortran")
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set (_lang F)
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else (lang STREQUAL "Fortran")
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set (_lang ${lang})
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endif (lang STREQUAL "Fortran")
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foreach (profile IN ITEMS DEBUG RELEASE)
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if (NOT CMAKE_${lang}_FLAGS_${profile})
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add_options (${lang} "${_prof_${profile}}"
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"$ENV{${_lang}FLAGS} ${CMAKE_${lang}_FLAGS_${profile}_INIT}")
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endif (NOT CMAKE_${lang}_FLAGS_${profile})
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endforeach (profile)
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endforeach (lang)
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endif ()
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