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CMakeLists: autodetect libatomic

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This commit is contained in:
yangfl 2018-01-05 21:20:31 +08:00
parent 9cc4e8d03a
commit e3238ff75c
2 changed files with 60 additions and 15 deletions
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28
build/CMakeLists.txt
View file

@ -83,7 +83,7 @@ if (WITH_WEBSOCKETS)
find_package(websocketpp REQUIRED)
endif ()
if (CMAKE_SYSTEM_NAME STREQUAL "Windows" OR MSYS)
if (WIN32 OR MSYS)
list (APPEND LIBI2PD_SRC "${CMAKE_SOURCE_DIR}/I2PEndian.cpp")
endif ()
@ -194,20 +194,14 @@ if (WITH_HARDENING AND MSVC)
endif ()
# compiler flags customization (by system)
if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
if (UNIX)
list (APPEND DAEMON_SRC "${DAEMON_SRC_DIR}/UnixDaemon.cpp")
# "'sleep_for' is not a member of 'std::this_thread'" in gcc 4.7/4.8
add_definitions( "-D_GLIBCXX_USE_NANOSLEEP=1" )
elseif (CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
list (APPEND DAEMON_SRC "${DAEMON_SRC_DIR}/UnixDaemon.cpp")
# "'sleep_for' is not a member of 'std::this_thread'" in gcc 4.7/4.8
add_definitions( "-D_GLIBCXX_USE_NANOSLEEP=1" )
elseif (CMAKE_SYSTEM_NAME STREQUAL "Darwin")
list (APPEND DAEMON_SRC "${DAEMON_SRC_DIR}/UnixDaemon.cpp")
elseif (CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
list (APPEND DAEMON_SRC "${DAEMON_SRC_DIR}/UnixDaemon.cpp")
elseif (CMAKE_SYSTEM_NAME STREQUAL "Windows" OR MSYS)
list (APPEND DAEMON_SRC "${CMAKE_SOURCE_DIR}/Win32/DaemonWin32.cpp")
if (NOT (CMAKE_SYSTEM_NAME STREQUAL "OpenBSD" OR APPLE))
# "'sleep_for' is not a member of 'std::this_thread'" in gcc 4.7/4.8
add_definitions( "-D_GLIBCXX_USE_NANOSLEEP=1" )
endif ()
elseif (WIN32 OR MSYS)
list (APPEND DAEMON_SRC "${CMAKE_SOURCE_DIR}/Win32/DaemonWin32.cpp")
if (WITH_GUI)
list (APPEND DAEMON_SRC "${CMAKE_SOURCE_DIR}/Win32/Win32App.cpp")
set_source_files_properties("${CMAKE_SOURCE_DIR}/Win32/DaemonWin32.cpp"
@ -263,6 +257,8 @@ if(THREADS_HAVE_PTHREAD_ARG) # compile time flag
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread")
endif()
include(CheckLibcxxAtomic)
if (WITH_STATIC)
set(Boost_USE_STATIC_LIBS ON)
set(Boost_USE_STATIC_RUNTIME ON)
@ -370,11 +366,13 @@ if (NOT ZLIB_FOUND )
if (NOT WITH_STATIC)
set ( ZLIB_LIBRARY debug zlibd optimized zlib CACHE STRING "zlib libraries" FORCE)
endif ()
link_directories(${CMAKE_CURRENT_BINARY_DIR}/zlib/lib)
else()
link_directories(${ZLIB_ROOT}/lib)
endif ()
if (WITH_STATIC AND (MSVC OR MSYS))
set ( ZLIB_LIBRARY debug zlibstaticd optimized zlibstatic CACHE STRING "zlib libraries" FORCE)
endif ()
link_directories(${CMAKE_CURRENT_BINARY_DIR}/zlib/lib ${ZLIB_ROOT}/lib)
# load includes
include_directories( SYSTEM ${Boost_INCLUDE_DIRS} ${OPENSSL_INCLUDE_DIR} ${ZLIB_INCLUDE_DIR} )

47
build/cmake_modules/CheckLibcxxAtomic.cmake Normal file
View file

@ -0,0 +1,47 @@
INCLUDE(CheckCXXSourceCompiles)
# Sometimes linking against libatomic is required for atomic ops, if
# the platform doesn't support lock-free atomics.
#
# We could modify LLVM's CheckAtomic module and have it check for 64-bit
# atomics instead. However, we would like to avoid careless uses of 64-bit
# atomics inside LLVM over time on 32-bit platforms.
function(check_cxx_atomics varname)
set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
set(CMAKE_REQUIRED_FLAGS "-nodefaultlibs -std=c++11 -nostdinc++ -isystem ${LIBCXX_SOURCE_DIR}/include")
if (${LIBCXX_GCC_TOOLCHAIN})
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} --gcc-toolchain=${LIBCXX_GCC_TOOLCHAIN}")
endif()
if (CMAKE_C_FLAGS MATCHES -fsanitize OR CMAKE_CXX_FLAGS MATCHES -fsanitize)
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fno-sanitize=all")
endif()
if (CMAKE_C_FLAGS MATCHES -fsanitize-coverage OR CMAKE_CXX_FLAGS MATCHES -fsanitize-coverage)
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fno-sanitize-coverage=edge,trace-cmp,indirect-calls,8bit-counters")
endif()
check_cxx_source_compiles("
#include <cstdint>
#include <atomic>
std::atomic<uintptr_t> x;
std::atomic<uintmax_t> y;
int main() {
return x + y;
}
" ${varname})
set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
endfunction(check_cxx_atomics)
check_cxx_atomics(LIBCXX_HAVE_CXX_ATOMICS_WITHOUT_LIB)
check_library_exists(atomic __atomic_fetch_add_8 "" LIBCXX_HAS_ATOMIC_LIB)
# If not, check if the library exists, and atomics work with it.
if(NOT LIBCXX_HAVE_CXX_ATOMICS_WITHOUT_LIB)
if(LIBCXX_HAS_ATOMIC_LIB)
list(APPEND CMAKE_REQUIRED_LIBRARIES "atomic")
check_cxx_atomics(LIBCXX_HAVE_CXX_ATOMICS_WITH_LIB)
if (NOT LIBCXX_HAVE_CXX_ATOMICS_WITH_LIB)
message(WARNING "Host compiler must support std::atomic!")
endif()
else()
message(WARNING "Host compiler appears to require libatomic, but cannot find it.")
endif()
endif()