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# Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# This file includes Linux specific options and quirks, related to system checks
INCLUDE(CheckSymbolExists)
# Something that needs to be set on legacy reasons
SET(TARGET_OS_LINUX 1)
SET(HAVE_NPTL 1)
SET(_GNU_SOURCE 1)
SET(CMAKE_REQUIRED_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} -D_GNU_SOURCE=1)
# Fix CMake (< 2.8) flags. -rdynamic exports too many symbols.
FOREACH(LANG C CXX)
STRING(REPLACE "-rdynamic" ""
CMAKE_SHARED_LIBRARY_LINK_${LANG}_FLAGS
${CMAKE_SHARED_LIBRARY_LINK_${LANG}_FLAGS}
)
ENDFOREACH()
# Ensure we have clean build for shared libraries
# without unresolved symbols
# Not supported with AddressSanitizer
IF(NOT WITH_ASAN AND NOT WITH_UBSAN)
SET(LINK_FLAG_NO_UNDEFINED "-Wl,--no-undefined")
ENDIF()
# 64 bit file offset support flag
SET(_FILE_OFFSET_BITS 64)
# Linux specific HUGETLB /large page support
CHECK_SYMBOL_EXISTS(SHM_HUGETLB sys/shm.h HAVE_DECL_SHM_HUGETLB)
IF(HAVE_DECL_SHM_HUGETLB)
SET(HAVE_LINUX_LARGE_PAGES 1)
SET(HUGETLB_USE_PROC_MEMINFO 1)
SET(HAVE_LARGE_PAGE_OPTION 1)
ENDIF()
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