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# Set compiler-specific flags
# Each of our project dirs sets CMAKE_CXX_FLAGS based on these. We do
# not set CMAKE_CXX_FLAGS globally because gtest is not warning-clean.
if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "\\w*Clang")
    if (ENABLE_CXX_WERROR)
        set(CMAKE_CXX_FLAGS "-Werror ${CMAKE_CXX_FLAGS}")
    endif()
    set(LEATHERMAN_CXX_FLAGS "-std=c++11 -Wall -Wextra -Wno-unused-parameter -Wno-tautological-constant-out-of-range-compare ${CMAKE_CXX_FLAGS}")

    # Clang warns that 'register' is deprecated; 'register' is used throughout boost, so it can't be an error yet.
    # The warning flag is different on different clang versions so we need to extract the clang version.
    # And the Mavericks version of clang report its version in its own special way (at least on 10.9.5) - yay
    EXECUTE_PROCESS( COMMAND ${CMAKE_CXX_COMPILER} --version OUTPUT_VARIABLE clang_full_version_string )
    if ("${CMAKE_SYSTEM_NAME}" MATCHES "Darwin")
        string (REGEX REPLACE ".*based on LLVM ([0-9]+\\.[0-9]+).*" "\\1" CLANG_VERSION_STRING ${clang_full_version_string})
        # Clang's output changed in Xcode 7.
        if (NOT ${clang_full_version_string})
            string(REGEX REPLACE "Apple LLVM version ([0-9]+\\.[0-9]+).*" "\\1" CLANG_VERSION_STRING ${clang_full_version_string})
        endif()
    else()
        string (REGEX REPLACE ".*clang version ([0-9]+\\.[0-9]+).*" "\\1" CLANG_VERSION_STRING ${clang_full_version_string})
    endif()
    MESSAGE( STATUS "CLANG_VERSION_STRING:         " ${CLANG_VERSION_STRING} )

    # Now based on clang version set the appropriate warning flag
    if ("${CLANG_VERSION_STRING}" VERSION_GREATER "3.4")
        set(LEATHERMAN_CXX_FLAGS "-Wno-deprecated-register ${LEATHERMAN_CXX_FLAGS}")
    else()
        set(LEATHERMAN_CXX_FLAGS "-Wno-deprecated ${LEATHERMAN_CXX_FLAGS}")
    endif()

    if ("${CLANG_VERSION_STRING}" VERSION_GREATER "6.9")
        set(LEATHERMAN_CXX_FLAGS "-Wno-unused-local-typedef ${LEATHERMAN_CXX_FLAGS}")
    endif()

    # FreeBSD needs -fPIC
    if(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
        set(LEATHERMAN_LIBRARY_FLAGS "-fPIC")
    endif()

elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
    # maybe-uninitialized is a relatively new GCC warning that Boost 1.57 violates; disable it for now until it's available in Clang as well
    # it's also sometimes wrong
    set(CMAKE_CXX_FLAGS "-Wno-maybe-uninitialized ${CMAKE_CXX_FLAGS}")

    if (ENABLE_CXX_WERROR)
        set(CMAKE_CXX_FLAGS "-Werror ${CMAKE_CXX_FLAGS}")
    endif()

    # missing-field-initializers is disabled because GCC can't make up their mind how to treat C++11 initializers
    set(LEATHERMAN_CXX_FLAGS "-std=c++11 -Wall -Wno-unused-parameter -Wno-unused-local-typedefs -Wno-unknown-pragmas -Wno-missing-field-initializers ${CMAKE_CXX_FLAGS}")
    if (NOT "${CMAKE_SYSTEM_NAME}" MATCHES "SunOS")
        set(LEATHERMAN_CXX_FLAGS "-Wextra ${LEATHERMAN_CXX_FLAGS}")
    endif()

    # On Windows with GCC 5.2.0, disable deprecated declarations because it causes warnings with Boost's use of auto_ptr
    if (WIN32)
        set(LEATHERMAN_CXX_FLAGS "-Wno-deprecated-declarations ${LEATHERMAN_CXX_FLAGS}")
    endif()

    # On unix systems we want to be sure to specify -fPIC for libraries
    if (NOT WIN32)
        set(LEATHERMAN_LIBRARY_FLAGS "-fPIC -nostdlib -nodefaultlibs")
    endif()
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
    #set(LEATHERMAN_CXX_FLAGS "${CMAKE_CXX_FLAGS} /Wall")
endif()

# Add code coverage
if (COVERALLS)
    set(LEATHERMAN_CXX_FLAGS "-fprofile-arcs -ftest-coverage ${LEATHERMAN_CXX_FLAGS}")
    set(CMAKE_SHARED_LINKER_FLAGS "--coverage ${CMAKE_SHARED_LINKER_FLAGS}")
    set(CMAKE_EXE_LINKER_FLAGS "--coverage ${CMAKE_EXE_LINKER_FLAGS}")
endif()

if (WIN32)
    # Update standard link libraries to explicitly exclude kernel32. It isn't necessary, and when compiling with
    # MinGW makes the executable unusable on Microsoft Nano Server due to including __C_specific_handler.
    SET(CMAKE_C_STANDARD_LIBRARIES "-luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32 -lbcrypt"
        CACHE STRING "Standard C link libraries." FORCE)
    SET(CMAKE_CXX_STANDARD_LIBRARIES "-luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32 -lbcrypt"
        CACHE STRING "Standard C++ link libraries." FORCE)

    # We currently support Windows Vista and later APIs, see
    # http://msdn.microsoft.com/en-us/library/windows/desktop/aa383745(v=vs.85).aspx for version strings.
    list(APPEND LEATHERMAN_DEFINITIONS -DWINVER=0x0600 -D_WIN32_WINNT=0x0600)

    # The GetUserNameEx function requires the application have a defined security level.
    # We define security sufficient to get the current user's info.
    # Also force use of UNICODE APIs, following the pattern outlined at http://utf8everywhere.org/.
    list(APPEND LEATHERMAN_DEFINITIONS -DUNICODE -D_UNICODE -DSECURITY_WIN32)
endif()

# Enforce UTF-8 in Leatherman.Logging; disable deprecated names in Boost.System to avoid warnings on Windows.
list(APPEND LEATHERMAN_DEFINITIONS -DBOOST_LOG_WITHOUT_WCHAR_T -DBOOST_SYSTEM_NO_DEPRECATED)

# Set project name for locale customization. Also set build directory for testing.
list(APPEND LEATHERMAN_DEFINITIONS -DPROJECT_NAME="${CMAKE_PROJECT_NAME}" -DPROJECT_DIR="${PROJECT_BINARY_DIR}")

if (NOT BOOST_STATIC)
    # Boost.Log requires that BOOST_LOG_DYN_LINK is set when using dynamic linking. We set ALL for consistency.
    list(APPEND LEATHERMAN_DEFINITIONS -DBOOST_ALL_DYN_LINK)
endif()

set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
if (WIN32)
    # On Windows, DLL paths aren't hardcoded in the executable. We place all the executables and libraries
    # in the same directory to avoid having to setup the DLL search path in the dev environment.
    set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
else()
    set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)
endif()

if ((LEATHERMAN_TOPLEVEL OR LEATHERMAN_HAVE_LOCALES) AND LEATHERMAN_USE_LOCALES)
    list(APPEND LEATHERMAN_DEFINITIONS -DLEATHERMAN_USE_LOCALES)
endif()