70 lines
2.3 KiB
CMake
70 lines
2.3 KiB
CMake
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# Copyright (c) 2010, 2018, Oracle and/or its affiliates. All rights reserved.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; version 2 of the License.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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# This file includes Linux specific options and quirks, related to system checks
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INCLUDE(CheckSymbolExists)
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INCLUDE(CheckCSourceRuns)
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SET(LINUX 1)
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# We require at least GCC 4.4 or Clang 3.3.
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IF(NOT FORCE_UNSUPPORTED_COMPILER)
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IF(CMAKE_COMPILER_IS_GNUCC)
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EXECUTE_PROCESS(COMMAND ${CMAKE_C_COMPILER} -dumpversion
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OUTPUT_VARIABLE GCC_VERSION)
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IF(GCC_VERSION VERSION_LESS 4.4)
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MESSAGE(FATAL_ERROR "GCC 4.4 or newer is required!")
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ENDIF()
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ELSEIF(CMAKE_C_COMPILER_ID MATCHES "Clang")
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CHECK_C_SOURCE_RUNS("
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int main()
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{
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return (__clang_major__ < 3) ||
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(__clang_major__ == 3 && __clang_minor__ < 3);
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}" HAVE_SUPPORTED_CLANG_VERSION)
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IF(NOT HAVE_SUPPORTED_CLANG_VERSION)
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MESSAGE(FATAL_ERROR "Clang 3.3 or newer is required!")
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ENDIF()
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ELSE()
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MESSAGE(FATAL_ERROR "Unsupported compiler!")
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ENDIF()
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ENDIF()
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# ISO C89, ISO C99, POSIX.1, POSIX.2, BSD, SVID, X/Open, LFS, and GNU extensions.
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ADD_DEFINITIONS(-D_GNU_SOURCE)
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# 64 bit file offset support flag
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ADD_DEFINITIONS(-D_FILE_OFFSET_BITS=64)
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# Fix CMake (< 2.8) flags. -rdynamic exports too many symbols.
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FOREACH(LANG C CXX)
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STRING(REPLACE "-rdynamic" ""
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CMAKE_SHARED_LIBRARY_LINK_${LANG}_FLAGS
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${CMAKE_SHARED_LIBRARY_LINK_${LANG}_FLAGS}
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)
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ENDFOREACH()
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# Ensure we have clean build for shared libraries
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# without unresolved symbols
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# Not supported with Sanitizers
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IF(NOT WITH_ASAN AND NOT WITH_MSAN AND NOT WITH_UBSAN)
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SET(LINK_FLAG_NO_UNDEFINED "-Wl,--no-undefined")
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ENDIF()
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# Linux specific HUGETLB /large page support
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CHECK_SYMBOL_EXISTS(SHM_HUGETLB sys/shm.h HAVE_LINUX_LARGE_PAGES)
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