00-Common.cmake

# -*- cmake -*-
#
# Compilation options shared by all Second Life components.

#*****************************************************************************
#   It's important to realize that CMake implicitly concatenates
#   CMAKE_CXX_FLAGS with (e.g.) CMAKE_CXX_FLAGS_RELEASE for Release builds. So
#   set switches in CMAKE_CXX_FLAGS that should affect all builds, but in
#   CMAKE_CXX_FLAGS_RELEASE or CMAKE_CXX_FLAGS_RELWITHDEBINFO for switches
#   that should affect only that build variant.
#
#   Also realize that CMAKE_CXX_FLAGS may already be partially populated on
#   entry to this file.
#*****************************************************************************

if(NOT DEFINED ${CMAKE_CURRENT_LIST_FILE}_INCLUDED)
set(${CMAKE_CURRENT_LIST_FILE}_INCLUDED "YES")

include(Variables)

# Portable compilation flags.
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DADDRESS_SIZE=${ADDRESS_SIZE}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DADDRESS_SIZE=${ADDRESS_SIZE}")
set(CMAKE_CXX_FLAGS_DEBUG "-D_DEBUG -DLL_DEBUG=1")
set(CMAKE_CXX_FLAGS_RELEASE
    "-DLL_RELEASE=1 -DLL_RELEASE_FOR_DOWNLOAD=1 -DNDEBUG")
set(CMAKE_CXX_FLAGS_RELWITHDEBINFO
    "-DLL_RELEASE=1 -DNDEBUG -DLL_RELEASE_WITH_DEBUG_INFO=1")
# Configure crash reporting
set(RELEASE_CRASH_REPORTING OFF CACHE BOOL "Enable use of crash reporting in release builds")
set(NON_RELEASE_CRASH_REPORTING OFF CACHE BOOL "Enable use of crash reporting in developer builds")

if(RELEASE_CRASH_REPORTING)
  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -DLL_SEND_CRASH_REPORTS=1")
endif()

if(NON_RELEASE_CRASH_REPORTING)
  set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -DLL_SEND_CRASH_REPORTS=1")
  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -DLL_SEND_CRASH_REPORTS=1")
endif()  

# Don't bother with a MinSizeRel build.
set(CMAKE_CONFIGURATION_TYPES "RelWithDebInfo;Release;Debug" CACHE STRING
    "Supported build types." FORCE)


# Platform-specific compilation flags.

if (WINDOWS)
  # Don't build DLLs.
  set(BUILD_SHARED_LIBS OFF)

  if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /MP")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP")
  elseif ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m${ADDRESS_SIZE}")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m${ADDRESS_SIZE}")
  endif ()

  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /Od /Zi /MDd /EHsc -D_SCL_SECURE_NO_WARNINGS=1")
  set(CMAKE_CXX_FLAGS_RELWITHDEBINFO
      "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /Od /Zi /MD /Ob0 /EHsc -D_ITERATOR_DEBUG_LEVEL=0")

  if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
    set(CMAKE_CXX_FLAGS_RELEASE
        "${CMAKE_CXX_FLAGS_RELEASE} /O2 /Oi /Ot /Gy /Zi /MD /Ob3 /Oy- /Zc:inline /EHsc /fp:fast -D_ITERATOR_DEBUG_LEVEL=0")
  elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
    set(CMAKE_CXX_FLAGS_RELEASE
        "${CMAKE_CXX_FLAGS_RELEASE} /clang:-Ofast /clang:-ffast-math /Oi /Ot /Gy /Zi /MD /Ob2 /Oy- /Zc:inline /EHsc /fp:fast -D_ITERATOR_DEBUG_LEVEL=0")
  endif()

  if (ADDRESS_SIZE EQUAL 32)
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /LARGEADDRESSAWARE")
  endif (ADDRESS_SIZE EQUAL 32)

  if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" OR FULL_DEBUG_SYMS OR USE_CRASHPAD)
    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /DEBUG:FULL")
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /DEBUG:FULL")
  else ()
    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /DEBUG:FASTLINK /IGNORE:4099")
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /DEBUG:FASTLINK /IGNORE:4099")
  endif ()

  set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /NODEFAULTLIB:LIBCMT")
  set(CMAKE_SHARED_LINKER_FLAGS_DEBUG "${CMAKE_SHARED_LINKER_FLAGS_DEBUG} /NODEFAULTLIB:LIBCMT /NODEFAULTLIB:LIBCMTD /NODEFAULTLIB:MSVCRT")
  set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /NODEFAULTLIB:LIBCMT")
  set(CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG} /NODEFAULTLIB:LIBCMT /NODEFAULTLIB:LIBCMTD /NODEFAULTLIB:MSVCRT")
  
  if (USE_LTO)
    if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
      if(INCREMENTAL_LINK)
        set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /LTCG:incremental")
        set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /LTCG:incremental")
        set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} /LTCG")
      else(INCREMENTAL_LINK)
        set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /LTCG")
        set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /LTCG")
        set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} /LTCG")
      endif(INCREMENTAL_LINK)
      set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /OPT:REF /OPT:ICF /INCREMENTAL:NO")
      set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /OPT:REF /OPT:ICF /INCREMENTAL:NO")
      set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /GL /Gy /Gw")
    elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
      if(INCREMENTAL_LINK)
        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -flto=thin -fwhole-program-vtables /clang:-fforce-emit-vtables")
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -flto=thin -fwhole-program-vtables /clang:-fforce-emit-vtables")
      else(INCREMENTAL_LINK)
        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -flto=full -fwhole-program-vtables /clang:-fforce-emit-vtables")
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -flto=full -fwhole-program-vtables /clang:-fforce-emit-vtables")
      endif(INCREMENTAL_LINK)
      set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /OPT:REF /OPT:ICF")
      set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /OPT:REF /OPT:ICF")
    endif()
  elseif (INCREMENTAL_LINK)
    set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /INCREMENTAL")
    set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /INCREMENTAL")
  else ()
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /OPT:REF /OPT:ICF /INCREMENTAL:NO")
    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /OPT:REF /OPT:ICF /INCREMENTAL:NO")
  endif ()

  if("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
    # This is a massive hack and makes me sad. clang-cl fails to find its own builtins library :/ x64 only for now.
    set(CLANG_RT_NAMES clang_rt.builtins-x86_64)
    find_library(CLANG_RT NAMES ${CLANG_RT_NAMES} 
                PATHS [HKEY_LOCAL_MACHINE\\SOFTWARE\\LLVM\\LLVM]/lib/clang/${CMAKE_CXX_COMPILER_VERSION}/lib/windows 
                [HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\LLVM\\LLVM]/lib/clang/${CMAKE_CXX_COMPILER_VERSION}/lib/windows)
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /defaultlib:\"${CLANG_RT}\"")
    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /defaultlib:\"${CLANG_RT}\"")
  endif()

  set(GLOBAL_CXX_FLAGS 
      "/GS /W3 /c /Zc:__cplusplus  /Zc:forScope /Zc:rvalueCast /Zc:strictStrings /Zc:ternary /Zc:wchar_t- /nologo"
      )

  if (USE_AVX2)
    set(GLOBAL_CXX_FLAGS "${GLOBAL_CXX_FLAGS} /arch:AVX2")
    add_definitions(/DAL_AVX2=1 /DAL_AVX=1)
  elseif (USE_AVX)
    set(GLOBAL_CXX_FLAGS "${GLOBAL_CXX_FLAGS} /arch:AVX")
    add_definitions(/DAL_AVX=1)
  elseif (ADDRESS_SIZE EQUAL 32)
    set(GLOBAL_CXX_FLAGS "${GLOBAL_CXX_FLAGS} /arch:SSE2")
  endif ()

  if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
    set(GLOBAL_CXX_FLAGS "${GLOBAL_CXX_FLAGS} /Zc:externConstexpr /Zc:referenceBinding")
  elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
    set(GLOBAL_CXX_FLAGS "${GLOBAL_CXX_FLAGS} /Qvec /Zc:dllexportInlines- /clang:-mprefer-vector-width=128 -fno-strict-aliasing -Wno-ignored-pragma-intrinsic -Wno-unused-local-typedef")
  endif()

  if(FAVOR_AMD AND FAVOR_INTEL)
      message(FATAL_ERROR "Cannot enable FAVOR_AMD and FAVOR_INTEL at the same time")
  elseif(FAVOR_AMD)
      set(GLOBAL_CXX_FLAGS "${GLOBAL_CXX_FLAGS} /favor:AMD64")
  elseif(FAVOR_INTEL)
      set(GLOBAL_CXX_FLAGS "${GLOBAL_CXX_FLAGS} /favor:INTEL64")
  endif()

  if (NOT VS_DISABLE_FATAL_WARNINGS)
    set(GLOBAL_CXX_FLAGS "${GLOBAL_CXX_FLAGS} /WX")
  endif (NOT VS_DISABLE_FATAL_WARNINGS)

  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${GLOBAL_CXX_FLAGS}" CACHE STRING "C++ compiler debug options" FORCE)
  set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} ${GLOBAL_CXX_FLAGS}" CACHE STRING "C++ compiler release-with-debug options" FORCE)
  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${GLOBAL_CXX_FLAGS}" CACHE STRING "C++ compiler release options" FORCE)

  add_definitions(
      /DLL_WINDOWS=1
      /DNOMINMAX
      /DUNICODE
      /DURI_STATIC_BUILD
      /D_UNICODE
      /D_CRT_SECURE_NO_WARNINGS
      /D_CRT_NONSTDC_NO_DEPRECATE
      /D_WINSOCK_DEPRECATED_NO_WARNINGS
      /D_SILENCE_CXX17_OLD_ALLOCATOR_MEMBERS_DEPRECATION_WARNING
      /DBOOST_CONFIG_SUPPRESS_OUTDATED_MESSAGE
      )

  if("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
    add_definitions(-DBOOST_USE_WINDOWS_H)
  endif()

  # configure win32 API for 7 and above compatibility
  set(WINVER "0x0601" CACHE STRING "Win32 API Target version (see http://msdn.microsoft.com/en-us/library/aa383745%28v=VS.85%29.aspx)")
  add_definitions("/DWINVER=${WINVER}" "/D_WIN32_WINNT=${WINVER}")
endif (WINDOWS)


if (LINUX)
  set(CMAKE_SKIP_RPATH TRUE)

  add_definitions(
      -DLL_LINUX=1
      -D_REENTRANT
      -DAPPID=secondlife
      )
  add_compile_options(
      -fvisibility=hidden
      -fexceptions
      -fno-math-errno
      -fno-strict-aliasing
      -fsigned-char
      -msse2
      -mfpmath=sse
      -pthread
      )

  # force this platform to accept TOS via external browser
  add_definitions(-DEXTERNAL_TOS)

  # don't catch SIGCHLD in our base application class for the viewer - some of
  # our 3rd party libs may need their *own* SIGCHLD handler to work. Sigh! The
  # viewer doesn't need to catch SIGCHLD anyway.
  add_definitions(-DLL_IGNORE_SIGCHLD)

  set(CMAKE_CXX_FLAGS_DEBUG "-fno-inline ${CMAKE_CXX_FLAGS_DEBUG}")
  set(CMAKE_CXX_FLAGS_RELEASE "-O3 -ffast-math -fstack-protector-strong -D_FORTIFY_SOURCE=2 ${CMAKE_CXX_FLAGS_RELEASE}")
  set(CMAKE_CXX_LINK_FLAGS "-Wl,--as-needed ${CMAKE_CXX_LINK_FLAGS}")
endif (LINUX)


if (DARWIN)
  # Warnings should be fatal -- thanks, Nicky Perian, for spotting reversed default
  set(CLANG_DISABLE_FATAL_WARNINGS OFF)
  set(CMAKE_CXX_LINK_FLAGS "-Wl,-headerpad_max_install_names,-search_paths_first")
  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_CXX_LINK_FLAGS}")
  set(DARWIN_extra_cstar_flags "-Wno-unused-local-typedef -Wno-deprecated-declarations")
  # Ensure that CMAKE_CXX_FLAGS has the correct -g debug information format --
  # see Variables.cmake.
  string(REPLACE "-gdwarf-2" "-g${CMAKE_XCODE_ATTRIBUTE_DEBUG_INFORMATION_FORMAT}"
    CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
  # The viewer code base can now be successfully compiled with -std=c++14. But
  # turning that on in the generic viewer-build-variables/variables file would
  # potentially require tweaking each of our ~50 third-party library builds.
  # Until we decide to set -std=c++14 in viewer-build-variables/variables, set
  # it locally here: we want to at least prevent inadvertently reintroducing
  # viewer code that would fail with C++14.
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${DARWIN_extra_cstar_flags} -std=c++14")
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}  ${DARWIN_extra_cstar_flags}")
  # NOTE: it's critical that the optimization flag is put in front.
  # NOTE: it's critical to have both CXX_FLAGS and C_FLAGS covered.
## Really?? On developer machines too?
##set(ENABLE_SIGNING TRUE)
##set(SIGNING_IDENTITY "Developer ID Application: Linden Research, Inc.")
endif (DARWIN)


if (LINUX OR DARWIN)
  if (CMAKE_CXX_COMPILER MATCHES ".*clang")
    set(CMAKE_COMPILER_IS_CLANGXX 1)
  endif (CMAKE_CXX_COMPILER MATCHES ".*clang")

  if (CMAKE_COMPILER_IS_GNUCXX)
    set(GCC_WARNINGS "-Wall -Wno-sign-compare -Wno-trigraphs -Wno-unused-function -Wno-misleading-indentation")
  elseif (CMAKE_COMPILER_IS_CLANGXX)
    set(GCC_WARNINGS "-Wall -Wno-sign-compare -Wno-trigraphs")
  endif()

  if (NOT GCC_DISABLE_FATAL_WARNINGS)
    set(GCC_WARNINGS "${GCC_WARNINGS} -Werror")
  endif (NOT GCC_DISABLE_FATAL_WARNINGS)

  set(GCC_CXX_WARNINGS "${GCC_WARNINGS} -Wno-reorder -Wno-non-virtual-dtor")

  set(CMAKE_C_FLAGS "${GCC_WARNINGS} ${CMAKE_C_FLAGS}")
  set(CMAKE_CXX_FLAGS "${GCC_CXX_WARNINGS} ${CMAKE_CXX_FLAGS}")

  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m${ADDRESS_SIZE}")
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m${ADDRESS_SIZE}")
endif (LINUX OR DARWIN)

add_definitions(-DBOOST_BIND_GLOBAL_PLACEHOLDERS)

if (USESYSTEMLIBS)
  add_definitions(-DLL_USESYSTEMLIBS=1)
endif (USESYSTEMLIBS)

option(RELEASE_SHOW_ASSERTS "Enable asserts in release builds" OFF)

if(RELEASE_SHOW_ASSERTS)
  add_definitions(-DRELEASE_SHOW_ASSERT=1)
else()
  add_definitions(-URELEASE_SHOW_ASSERT)
endif()

endif(NOT DEFINED ${CMAKE_CURRENT_LIST_FILE}_INCLUDED)