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https://github.com/OPM/opm-simulators.git
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7bf82f96b2
When using LTO, the linker calls back to the compiler to figure out where a certain symbol is defined. However, in many versions there is apparently a bug that is triggered if a template in inlined in both a used library and in the main program, but with different versions of the compiler. The Boost exception class is particular prone for this. Thus, we disable the -lto from the development builds by default; if anyone wants to test of the behaviour of their own compiler, they must now explicitly turn on this flag.
63 lines
2.1 KiB
CMake
63 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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# 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 (CMAKE_COMPILER_IS_GNUCXX)
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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 (_opt_dbg "-O0" "(^|\ )-O")
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set_default_option (_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 (CMAKE_COMPILER_IS_GNUCXX)
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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 (CMAKE_COMPILER_IS_GNUCXX)
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