include (CheckFunctionExists)
include (CheckIncludeFile)
include (CheckLibraryExists)
include (CheckSymbolExists)
include (CheckTypeSize)
include (TestBigEndian)

include (TestInline)
include (ClipMode)
include(TestLargeFiles)

test_large_files(_LARGEFILES)

if (LARGE_FILES_DEFINITIONS)
	add_definitions(${LARGE_FILES_DEFINITIONS})
endif ()

if (WIN32)
    set(TYPEOF_SF_COUNT_T __int64)
else (UNIX)
    set(TYPEOF_SF_COUNT_T int64_t)
endif ()
set(SF_COUNT_MAX 0x7fffffffffffffffll)

if (NOT WIN32)
	find_package (ALSA)
	if (ALSA_FOUND)
		set (HAVE_ALSA_ASOUNDLIB_H TRUE)
	else ()
		find_package (Sndio)
		set (HAVE_SNDIO_H ${SNDIO_FOUND})
	endif (ALSA_FOUND)
endif ()

if (NOT DISABLE_EXTERNAL_LIBS)
find_package (Ogg)
find_package (Vorbis)
find_package (FLAC)
if (OGG_FOUND AND VORBIS_FOUND AND FLAC_FOUND)
    set (HAVE_EXTERNAL_XIPH_LIBS 1)
	set (EXTERNAL_XIPH_LIBS
		${OGG_LIBRARIES}
		${VORBIS_LIBRARIES}
		${FLAC_LIBRARIES})
else ()
    set (DISABLE_EXTERNAL_LIBS ON)
endif ()
endif ()

if (ENABLE_EXPERIMENTAL)
	find_package (Speex)
endif ()

check_include_file(byteswap.h       HAVE_BYTESWAP_H)
check_include_file(dlfcn.h          HAVE_DLFCN_H)
check_include_file(endian.h         HAVE_ENDIAN_H)
check_include_file(inttypes.h       HAVE_INTTYPES_H)
check_include_file(locale.h         HAVE_LOCALE_H)
check_include_file(memory.h         HAVE_MEMORY_H)
check_include_file(stdint.h         HAVE_STDINT_H)
check_include_file(stdlib.h         HAVE_STDLIB_H)
check_include_file(string.h         HAVE_STRING_H)
check_include_file(strings.h        HAVE_STRINGS_H)
check_include_file(sys/stat.h       HAVE_SYS_STAT_H)
check_include_file(sys/time.h		HAVE_SYS_TIME_H)
check_include_file(sys/types.h      HAVE_SYS_TYPES_H)
check_include_file(sys/wait.h       HAVE_SYS_WAIT_H)
check_include_file(unistd.h         HAVE_UNISTD_H)
check_include_file(io.h             HAVE_IO_H)
check_type_size(int64_t             SIZEOF_INT64_T)
check_type_size(double              SIZEOF_DOUBLE)
check_type_size(float               SIZEOF_FLOAT)
check_type_size(int                 SIZEOF_INT)
check_type_size(loff_t              SIZEOF_LOFF_T)
check_type_size(long                SIZEOF_LONG)
check_type_size(long\ long          SIZEOF_LONG_LONG)
check_type_size(offt64_t            SIZEOF_OFF64_T)
check_type_size(short               SIZEOF_SHORT)
check_type_size(size_t              SIZEOF_SIZE_T)
check_type_size(ssize_t             SIZEOF_SSIZE_T)
check_type_size(void*               SIZEOF_VOIDP)
check_type_size(wchar_t             SIZEOF_WCHAR_T)

if ((SIZEOF_OFF_T EQUAL 8) OR (SIZEOF_LOFF_T EQUAL 8) OR (SIZEOF_OFF64_T EQUAL 8))
	set (TYPEOF_SF_COUNT_T "int64_t")
	set (SF_COUNT_MAX "0x7FFFFFFFFFFFFFFFLL")
	set (SIZEOF_SF_COUNT_T 8)
else ()
	if (WIN32)
		set (TYPEOF_SF_COUNT_T "__int64")
		set (SF_COUNT_MAX "0x7FFFFFFFFFFFFFFFLL")
		set (SIZEOF_SF_COUNT_T 8)
	else (NOT WIN32)
		message ("")
		message ("*** The configure process has determined that this system is capable")
		message ("*** of Large File Support but has not been able to find a type which")
		message ("*** is an unambiguous 64 bit file offset.")
		message ("*** Please contact the author to help resolve this problem.")
		message ("")
		message (FATAL_ERROR "Bad file offset type.")
	endif (WIN32)
endif ()

check_type_size(${TYPEOF_SF_COUNT_T} SIZEOF_SF_COUNT_T)

find_library (M_LIBRARY m)
if (M_LIBRARY)
	# Check if he need to link 'm' for math functions
	check_library_exists (m floor "" LIBM_REQUIRED)
	if (LIBM_REQUIRED)
		list (APPEND CMAKE_REQUIRED_LIBRARIES ${M_LIBRARY})
	else ()
		unset (M_LIBRARY)
	endif ()
endif ()

check_library_exists (sqlite3 sqlite3_close "" HAVE_SQLITE3)

check_function_exists(calloc		HAVE_CALLOC)
check_function_exists(free			HAVE_FREE)
check_function_exists(fstat     	HAVE_FSTAT)
check_function_exists(fstat64		HAVE_FSTAT64)
check_function_exists(fsync    		HAVE_FSYNC)
check_function_exists(ftruncate		HAVE_FTRUNCATE)
check_function_exists(getpagesize	HAVE_GETPAGESIZE)
check_function_exists(gettimeofday	HAVE_GETTIMEOFDAY)
check_function_exists(gmtime		HAVE_GMTIME)
check_function_exists(gmtime_r		HAVE_GMTIME_R)
check_function_exists(localtime		HAVE_LOCALTIME)
check_function_exists(localtime_r	HAVE_LOCALTIME_R)
check_function_exists(lseek      	HAVE_LSEEK)
check_function_exists(lseek64		HAVE_LSEEK64)
check_function_exists(malloc		HAVE_MALLOC)
check_function_exists(mmap			HAVE_MMAP)
check_function_exists(open			HAVE_OPEN)
check_function_exists(pipe			HAVE_PIPE)
check_function_exists(read			HAVE_READ)
check_function_exists(realloc		HAVE_REALLOC)
check_function_exists(setlocale		HAVE_SETLOCALE)
check_function_exists(snprintf		HAVE_SNPRINTF)
check_function_exists(vsnprintf		HAVE_VSNPRINTF)
check_function_exists(waitpid		HAVE_WAITPID)
check_function_exists(write			HAVE_WRITE)
check_function_exists(ceil			HAVE_CEIL)
check_function_exists(floor			HAVE_FLOOR)
check_function_exists(fmod			HAVE_FMOD)
check_function_exists(lrint			HAVE_LRINT)
check_function_exists(lrintf		HAVE_LRINTF)
check_function_exists(lround		HAVE_LROUND)

check_symbol_exists (S_IRGRP sys/stat.h HAVE_DECL_S_IRGRP)

test_big_endian(WORDS_BIGENDIAN)
if (WORDS_BIGENDIAN)
	set (WORDS_BIGENDIAN 1)
	set (CPU_IS_BIG_ENDIAN 1)
else (${LITTLE_ENDIAN})
	set (CPU_IS_LITTLE_ENDIAN 1)
endif ()

if (WIN32)
	set (OS_IS_WIN32 1)
	set (USE_WINDOWS_API 1)
	if (BUILD_SHARED_LIBS)
		set (WIN32_TARGET_DLL 1)
	endif ()
if (MINGW)
	set (__USE_MINGW_ANSI_STDIO 1)
endif (MINGW)
endif (WIN32)

if (${CMAKE_SYSTEM_NAME} STREQUAL "OpenBSD")
	set (OS_IS_OPENBSD 1)
endif ()


if (CMAKE_COMPILER_IS_GNUCC OR (CMAKE_C_COMPILER_ID MATCHES "Clang"))
	set (COMPILER_IS_GCC 1)
endif ()

if (COMPILER_IS_GCC)
	set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra")
endif ()

if (ENABLE_EXPERIMENTAL)
	set (ENABLE_EXPERIMENTAL_CODE 1)
endif ()

test_inline ()
if (NOT DISABLE_CPU_CLIP)
	clip_mode ()
endif ()

find_program (AUTOGEN_EXECUTABLE NAMES autogen)
if (NOT AUTOGEN_EXECUTABLE)
	message ("autogen tool not found: tests will not be build.")
	SET (BUILD_TESTING OFF)
endif ()