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Only set _POSIX_C_SOURCE if needed

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This commit is contained in:
Chris Robinson
2015-12-04 18:52:46 -08:00
parent 675ec99d33
commit 4e6acfa0d5
1 changed files with 28 additions and 18 deletions
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CMakeLists.txt
+28 -18
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@@ -41,7 +41,9 @@ OPTION(ALSOFT_HRTF_DEFS "Install HRTF definition files" ON)
OPTION(ALSOFT_INSTALL "Install headers and libraries" ON)
IF(WIN32)
IF(NOT WIN32)
SET(LIBNAME openal)
ELSE()
SET(LIBNAME OpenAL32)
ADD_DEFINITIONS("-D_WIN32 -D_WIN32_WINNT=0x0502")
@@ -60,23 +62,8 @@ IF(WIN32)
ENDIF()
ENDIF()
ENDIF()
ELSE()
SET(LIBNAME openal)
# These are needed on non-Windows systems for extra features
ADD_DEFINITIONS(-D_GNU_SOURCE=1 -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=700)
SET(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -D_GNU_SOURCE=1 -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=700")
ENDIF()
# Set defines for large file support
CHECK_FILE_OFFSET_BITS()
IF(_FILE_OFFSET_BITS)
ADD_DEFINITIONS(-D_FILE_OFFSET_BITS=${_FILE_OFFSET_BITS})
SET(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -D_FILE_OFFSET_BITS=${_FILE_OFFSET_BITS}")
ENDIF()
ADD_DEFINITIONS(-D_LARGEFILE_SOURCE -D_LARGE_FILES)
SET(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -D_LARGEFILE_SOURCE -D_LARGE_FILES")
# QNX's gcc do not uses /usr/include and /usr/lib pathes by default
IF ("${CMAKE_C_PLATFORM_ID}" STREQUAL "QNX")
@@ -111,6 +98,29 @@ ELSE()
ENDIF()
ENDIF()
# Check if _POSIX_C_SOURCE needs to be set for POSIX functions
CHECK_SYMBOL_EXISTS(posix_memalign stdlib.h HAVE_POSIX_MEMALIGN_DEFAULT)
IF(NOT HAVE_POSIX_MEMALIGN_DEFAULT)
SET(OLD_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
SET(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -D_POSIX_C_SOURCE=200809L")
CHECK_SYMBOL_EXISTS(posix_memalign stdlib.h HAVE_POSIX_MEMALIGN_POSIX)
IF(NOT HAVE_POSIX_MEMALIGN_POSIX)
SET(CMAKE_REQUIRED_FLAGS ${OLD_REQUIRED_FLAGS})
ELSE()
ADD_DEFINITIONS(-D_POSIX_C_SOURCE=200809L)
ENDIF()
UNSET(OLD_REQUIRED_FLAGS)
ENDIF()
# Set defines for large file support
CHECK_FILE_OFFSET_BITS()
IF(_FILE_OFFSET_BITS)
ADD_DEFINITIONS(-D_FILE_OFFSET_BITS=${_FILE_OFFSET_BITS})
SET(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -D_FILE_OFFSET_BITS=${_FILE_OFFSET_BITS}")
ENDIF()
ADD_DEFINITIONS(-D_LARGEFILE_SOURCE -D_LARGE_FILES)
SET(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -D_LARGEFILE_SOURCE -D_LARGE_FILES")
# MSVC may need workarounds for C99 restrict and inline
IF(MSVC)
# TODO: Once we truly require C99, these restrict and inline checks should go
@@ -476,12 +486,12 @@ ENDIF()
# Check if we have Windows headers
CHECK_INCLUDE_FILE(windows.h HAVE_WINDOWS_H -D_WIN32_WINNT=0x0502)
IF(NOT HAVE_WINDOWS_H)
CHECK_FUNCTION_EXISTS(gettimeofday HAVE_GETTIMEOFDAY)
CHECK_SYMBOL_EXISTS(gettimeofday sys/time.h HAVE_GETTIMEOFDAY)
IF(NOT HAVE_GETTIMEOFDAY)
MESSAGE(FATAL_ERROR "No timing function found!")
ENDIF()
CHECK_FUNCTION_EXISTS(nanosleep HAVE_NANOSLEEP)
CHECK_SYMBOL_EXISTS(nanosleep time.h HAVE_NANOSLEEP)
IF(NOT HAVE_NANOSLEEP)
MESSAGE(FATAL_ERROR "No sleep function found!")
ENDIF()