configure.ac - platform/external/flac - Gitiles

 #  FLAC - Free Lossless Audio Codec
 #  Copyright (C) 2001,2002,2003,2004,2005,2006,2007,2008,2009  Josh Coalson
 #
 #  This file is part the FLAC project.  FLAC is comprised of several
 #  components distributed under different licenses.  The codec libraries
 #  are distributed under Xiph.Org's BSD-like license (see the file
 #  COPYING.Xiph in this distribution).  All other programs, libraries, and
 #  plugins are distributed under the GPL (see COPYING.GPL).  The documentation
 #  is distributed under the Gnu FDL (see COPYING.FDL).  Each file in the
 #  FLAC distribution contains at the top the terms under which it may be
 #  distributed.
 #
 #  Since this particular file is relevant to all components of FLAC,
 #  it may be distributed under the Xiph.Org license, which is the least
 #  restrictive of those mentioned above.  See the file COPYING.Xiph in this
 #  distribution.

 # NOTE that for many of the AM_CONDITIONALs we use the prefix FLaC__
 # instead of FLAC__ since autoconf triggers off 'AC_' in strings

 AC_PREREQ(2.60)
 AC_INIT([flac], [1.3.3], [flac-dev@xiph.org], [flac], [https://www.xiph.org/flac/])
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_SRCDIR([src/flac/main.c])
 AC_CONFIG_MACRO_DIR([m4])
 AM_INIT_AUTOMAKE([foreign 1.10 -Wall tar-pax no-dist-gzip dist-xz subdir-objects])
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

 AC_MSG_CHECKING([whether configure should try to set CFLAGS/CXXFLAGS/CPPFLAGS/LDFLAGS])
 AS_IF([test "x${CFLAGS+set}" = "xset" || test "x${CXXFLAGS+set}" = "xset" || test "x${CPPFLAGS+set}" = "xset" || test "x${LDFLAGS+set}" = "xset"],
 	[enable_flags_setting=no],
 	[enable_flags_setting=yes]
 )
 AC_MSG_RESULT([${enable_flags_setting}])
 AX_CHECK_ENABLE_DEBUG
 user_cflags=$CFLAGS

 #Prefer whatever the current ISO standard is.
 AC_PROG_CC_STDC
 AC_USE_SYSTEM_EXTENSIONS
 m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
 LT_INIT([win32-dll disable-static pic-only])
 AM_PROG_AS
 AC_PROG_CXX
 XIPH_C_COMPILER_IS_CLANG
 XIPH_GCC_REALLY_IS_GCC
 AC_PROG_MAKE_SET
 AC_PROG_MKDIR_P

 AC_SYS_LARGEFILE
 AC_FUNC_FSEEKO

 AC_CHECK_SIZEOF(off_t,1)	# Fake default value.
 AC_CHECK_SIZEOF([void*])
 AC_SEARCH_LIBS([lround],[m], [AC_DEFINE(HAVE_LROUND,1,lround support)])

 AC_LANG_PUSH([C++])
 # c++ flavor first
 AC_C_VARARRAYS
 if test $ac_cv_c_vararrays = yes; then
 	AC_DEFINE([HAVE_CXX_VARARRAYS], 1, [Define to 1 if C++ supports variable-length arrays.])
 fi
 AC_LANG_POP([C++])

 # c flavor
 AC_HEADER_STDC
 AM_PROG_CC_C_O
 AC_C_INLINE
 AC_C_VARARRAYS
 AC_C_TYPEOF

 AC_CHECK_HEADERS([stdint.h inttypes.h byteswap.h sys/param.h sys/ioctl.h termios.h x86intrin.h cpuid.h])

 XIPH_C_BSWAP32
 XIPH_C_BSWAP16

 ac_cv_c_big_endian=0
 ac_cv_c_little_endian=0
 AC_C_BIGENDIAN([ac_cv_c_big_endian=1], [ac_cv_c_little_endian=1], [
 	AC_MSG_WARN([[*****************************************************************]])
 	AC_MSG_WARN([[*** Not able to determine endian-ness of target processor.       ]])
 	AC_MSG_WARN([[*** The constants CPU_IS_BIG_ENDIAN and CPU_IS_LITTLE_ENDIAN in  ]])
 	AC_MSG_WARN([[*** config.h may need to be hand editied.                        ]])
 	AC_MSG_WARN([[*****************************************************************]])
 ])
 AC_DEFINE_UNQUOTED(CPU_IS_BIG_ENDIAN, ${ac_cv_c_big_endian},
 					[Target processor is big endian.])
 AC_DEFINE_UNQUOTED(CPU_IS_LITTLE_ENDIAN, ${ac_cv_c_little_endian},
 					[Target processor is little endian.])
 AC_DEFINE_UNQUOTED(WORDS_BIGENDIAN, ${ac_cv_c_big_endian},
 					[Target processor is big endian.])

 AC_ARG_ENABLE(asm-optimizations, AC_HELP_STRING([--disable-asm-optimizations], [Don't use any assembly optimization routines]), asm_opt=no, asm_opt=yes)
 dnl ' Terminate the damn single quote
 AM_CONDITIONAL(FLaC__NO_ASM, test "x$asm_opt" = xno)
 if test "x$asm_opt" = xno ; then
 AC_DEFINE(FLAC__NO_ASM)
 AH_TEMPLATE(FLAC__NO_ASM, [define to disable use of assembly code])
 fi

 # For the XMMS plugin.
 AC_CHECK_TYPES(socklen_t, [], [])

 dnl check for getopt in standard library
 dnl AC_CHECK_FUNCS(getopt_long , , [LIBOBJS="$LIBOBJS getopt.o getopt1.o"] )
 AC_CHECK_FUNCS(getopt_long, [], [])

 AC_CHECK_SIZEOF(void*,1)

 asm_optimisation=no
 case "$host_cpu" in
 	amd64|x86_64)
 		case "$host" in
 			*gnux32)
 				# x32 user space and 64 bit kernel.
 				cpu_x86_64=true
 				AC_DEFINE(FLAC__CPU_X86_64)
 				AH_TEMPLATE(FLAC__CPU_X86_64, [define if building for x86_64])
 				asm_optimisation=$asm_opt
 				;;
 			*)
 				if test $ac_cv_sizeof_voidp = 4 ; then
 					# This must be a 32 bit user space running on 64 bit kernel so treat
 					# this as ia32.
 					cpu_ia32=true
 					AC_DEFINE(FLAC__CPU_IA32)
 					AH_TEMPLATE(FLAC__CPU_IA32, [define if building for ia32/i386])
 			else
 					# x86_64 user space and kernel.
 					cpu_x86_64=true
 					AC_DEFINE(FLAC__CPU_X86_64)
 					AH_TEMPLATE(FLAC__CPU_X86_64, [define if building for x86_64])
 				fi
 				asm_optimisation=$asm_opt
 				;;
 		esac
 		;;
 	i*86)
 		cpu_ia32=true
 		AC_DEFINE(FLAC__CPU_IA32)
 		AH_TEMPLATE(FLAC__CPU_IA32, [define if building for ia32/i386])
 		asm_optimisation=$asm_opt
 		;;
 	powerpc64|powerpc64le)
 		cpu_ppc64=true
 		cpu_ppc=true
 		AC_CHECK_HEADER(sys/auxv.h, AC_DEFINE(FLAC__CPU_PPC))
 		AH_TEMPLATE(FLAC__CPU_PPC, [define if building for PowerPC])
 		AC_DEFINE(FLAC__CPU_PPC64)
 		AH_TEMPLATE(FLAC__CPU_PPC64, [define if building for PowerPC64])
 		asm_optimisation=$asm_opt
 		;;
 	powerpc|powerpcle)
 		cpu_ppc=true
 		AC_CHECK_HEADER(sys/auxv.h, AC_DEFINE(FLAC__CPU_PPC))
 		AH_TEMPLATE(FLAC__CPU_PPC, [define if building for PowerPC])
 		asm_optimisation=$asm_opt
 		;;
 	sparc)
 		cpu_sparc=true
 		AC_DEFINE(FLAC__CPU_SPARC)
 		AH_TEMPLATE(FLAC__CPU_SPARC, [define if building for SPARC])
 		asm_optimisation=$asm_opt
 		;;
 esac
 AM_CONDITIONAL(FLAC__CPU_X86_64, test "x$cpu_x86_64" = xtrue)
 AM_CONDITIONAL(FLaC__CPU_IA32, test "x$cpu_ia32" = xtrue)
 AM_CONDITIONAL(FLaC__CPU_PPC, test "x$cpu_ppc" = xtrue)
 AM_CONDITIONAL(FLaC__CPU_PPC64, test "x$cpu_ppc64" = xtrue)
 AM_CONDITIONAL(FLaC__CPU_SPARC, test "x$cpu_sparc" = xtrue)

 if test "x$ac_cv_header_x86intrin_h" = xyes; then
 AC_DEFINE([FLAC__HAS_X86INTRIN], 1, [Set to 1 if <x86intrin.h> is available.])
 else
 AC_DEFINE([FLAC__HAS_X86INTRIN], 0)
 fi

 if test x"$cpu_ppc64" = xtrue ; then

 AC_C_ATTRIBUTE([target("cpu=power8")],
   [have_cpu_power8=yes],
   [have_cpu_power8=no])
 if test x"$have_cpu_power8" = xyes ; then
   AC_DEFINE(FLAC__HAS_TARGET_POWER8)
   AH_TEMPLATE(FLAC__HAS_TARGET_POWER8, [define if compiler has __attribute__((target("cpu=power8"))) support])
 fi

 AC_C_ATTRIBUTE([target("cpu=power9")],
   [have_cpu_power9=yes],
   [have_cpu_power9=no])
 if test x"$have_cpu_power9" = xyes ; then
   AC_DEFINE(FLAC__HAS_TARGET_POWER9)
   AH_TEMPLATE(FLAC__HAS_TARGET_POWER9, [define if compiler has __attribute__((target("cpu=power9"))) support])
 fi

 fi

 case "$host" in
 	i386-*-openbsd3.[[0-3]]) OBJ_FORMAT=aoutb ;;
 	*-*-cygwin|*mingw*) OBJ_FORMAT=win32 ;;
 	*-*-darwin*) OBJ_FORMAT=macho ;;
 	*emx*) OBJ_FORMAT=aout ;;
 	*djgpp) OBJ_FORMAT=coff ;;
 	*) OBJ_FORMAT=elf ;;
 esac
 AC_SUBST(OBJ_FORMAT)

 os_is_windows=no
 case "$host" in
 	*mingw*)
 		CPPFLAGS="-D__MSVCRT_VERSION__=0x0601 $CPPFLAGS"
 		os_is_windows=yes
 		;;
 esac

 AM_CONDITIONAL(OS_IS_WINDOWS, test "x$os_is_windows" = xyes)

 case "$host" in
 	*-linux-*)
 		sys_linux=true
 		AC_DEFINE(FLAC__SYS_LINUX)
 		AH_TEMPLATE(FLAC__SYS_LINUX, [define if building for Linux])
 		;;
 	*-*-darwin*)
 		sys_darwin=true
 		AC_DEFINE(FLAC__SYS_DARWIN)
 		AH_TEMPLATE(FLAC__SYS_DARWIN, [define if building for Darwin / MacOS X])
 		;;
 esac
 AM_CONDITIONAL(FLaC__SYS_DARWIN, test "x$sys_darwin" = xtrue)
 AM_CONDITIONAL(FLaC__SYS_LINUX, test "x$sys_linux" = xtrue)

 if test "x$cpu_ia32" = xtrue || test "x$cpu_x86_64" = xtrue ; then
 AC_DEFINE(FLAC__ALIGN_MALLOC_DATA)
 AH_TEMPLATE(FLAC__ALIGN_MALLOC_DATA, [define to align allocated memory on 32-byte boundaries])
 fi

 AM_CONDITIONAL([DEBUG], [test "x${ax_enable_debug}" = "xyes" || test "x${ax_enable_debug}" = "xinfo"])

 AC_ARG_ENABLE(sse,
 AC_HELP_STRING([--disable-sse], [Disable passing of -msse2 to the compiler]),
 [case "${enableval}" in
 	yes) sse_os=yes ;;
 	no)  sse_os=no ;;
 	*) AC_MSG_ERROR(bad value ${enableval} for --enable-sse) ;;
 esac],[sse_os=yes])

 AC_ARG_ENABLE(altivec,
 AC_HELP_STRING([--disable-altivec], [Disable Altivec optimizations]),
 [case "${enableval}" in
 	yes) use_altivec=true ;;
 	no)  use_altivec=false ;;
 	*) AC_MSG_ERROR(bad value ${enableval} for --enable-altivec) ;;
 esac],[use_altivec=true])
 AM_CONDITIONAL(FLaC__USE_ALTIVEC, test "x$use_altivec" = xtrue)
 if test "x$use_altivec" = xtrue ; then
 AC_DEFINE(FLAC__USE_ALTIVEC)
 AH_TEMPLATE(FLAC__USE_ALTIVEC, [define to enable use of Altivec instructions])
 fi

 AC_ARG_ENABLE(vsx,
 AC_HELP_STRING([--disable-vsx], [Disable VSX optimizations]),
 [case "${enableval}" in
 	yes) use_vsx=true ;;
 	no)  use_vsx=false ;;
 	*) AC_MSG_ERROR(bad value ${enableval} for --enable-vsx) ;;
 esac],[use_vsx=true])
 AM_CONDITIONAL(FLaC__USE_VSX, test "x$use_vsx" = xtrue)
 if test "x$use_vsx" = xtrue ; then
 AC_DEFINE(FLAC__USE_VSX)
 AH_TEMPLATE(FLAC__USE_VSX, [define to enable use of VSX instructions])
 fi

 AC_ARG_ENABLE(avx,
 AC_HELP_STRING([--disable-avx], [Disable AVX, AVX2 optimizations]),
 [case "${enableval}" in
 	yes) use_avx=true ;;
 	no)  use_avx=false ;;
 	*) AC_MSG_ERROR(bad value ${enableval} for --enable-avx) ;;
 esac],[use_avx=true])
 AM_CONDITIONAL(FLaC__USE_AVX, test "x$use_avx" = xtrue)
 if test "x$use_avx" = xtrue ; then
 AC_DEFINE(FLAC__USE_AVX)
 AH_TEMPLATE(FLAC__USE_AVX, [define to enable use of AVX instructions])
 fi

 AC_ARG_ENABLE(thorough-tests,
 AC_HELP_STRING([--disable-thorough-tests], [Disable thorough (long) testing, do only basic tests]),
 [case "${enableval}" in
 	yes) thorough_tests=true ;;
 	no)  thorough_tests=false ;;
 	*) AC_MSG_ERROR(bad value ${enableval} for --enable-thorough-tests) ;;
 esac],[thorough_tests=true])
 AC_ARG_ENABLE(exhaustive-tests,
 AC_HELP_STRING([--enable-exhaustive-tests], [Enable exhaustive testing (VERY long)]),
 [case "${enableval}" in
 	yes) exhaustive_tests=true ;;
 	no)  exhaustive_tests=false ;;
 	*) AC_MSG_ERROR(bad value ${enableval} for --enable-exhaustive-tests) ;;
 esac],[exhaustive_tests=false])
 if test "x$thorough_tests" = xfalse ; then
 FLAC__TEST_LEVEL=0
 elif test "x$exhaustive_tests" = xfalse ; then
 FLAC__TEST_LEVEL=1
 else
 FLAC__TEST_LEVEL=2
 fi
 AC_SUBST(FLAC__TEST_LEVEL)

 AC_ARG_ENABLE(werror,
 	AC_HELP_STRING([--enable-werror], [Enable -Werror in all Makefiles]))

 AC_ARG_ENABLE(stack-smash-protection,
 	AC_HELP_STRING([--enable-stack-smash-protection], [Enable GNU GCC stack smash protection]))

 AC_ARG_ENABLE(64-bit-words,
 	AC_HELP_STRING([--enable-64-bit-words], [Set FLAC__BYTES_PER_WORD to 8 (4 is the default)]))
 if test "x$enable_64_bit_words" = xyes ; then
 	AC_DEFINE_UNQUOTED([ENABLE_64_BIT_WORDS],1,[Set FLAC__BYTES_PER_WORD to 8 (4 is the default)])
 else
 	AC_DEFINE_UNQUOTED([ENABLE_64_BIT_WORDS],0)
 	fi
 AC_SUBST(ENABLE_64_BIT_WORDS)

 AC_ARG_ENABLE(valgrind-testing,
 AC_HELP_STRING([--enable-valgrind-testing], [Run all tests inside Valgrind]),
 [case "${enableval}" in
 	yes) FLAC__TEST_WITH_VALGRIND=yes ;;
 	no)  FLAC__TEST_WITH_VALGRIND=no ;;
 	*) AC_MSG_ERROR(bad value ${enableval} for --enable-valgrind-testing) ;;
 esac],[FLAC__TEST_WITH_VALGRIND=no])
 AC_SUBST(FLAC__TEST_WITH_VALGRIND)

 AC_ARG_ENABLE(doxygen-docs,
 AC_HELP_STRING([--disable-doxygen-docs], [Disable API documentation building via Doxygen]),
 [case "${enableval}" in
 	yes) enable_doxygen_docs=true ;;
 	no)  enable_doxygen_docs=false ;;
 	*) AC_MSG_ERROR(bad value ${enableval} for --enable-doxygen-docs) ;;
 esac],[enable_doxygen_docs=true])
 if test "x$enable_doxygen_docs" != xfalse ; then
 	AC_CHECK_PROGS(DOXYGEN, doxygen)
 fi
 AM_CONDITIONAL(FLaC__HAS_DOXYGEN, test -n "$DOXYGEN")

 AC_ARG_ENABLE(local-xmms-plugin,
 AC_HELP_STRING([--enable-local-xmms-plugin], [Install XMMS plugin to ~/.xmms/Plugins instead of system location]),
 [case "${enableval}" in
 	yes) install_xmms_plugin_locally=true ;;
 	no)  install_xmms_plugin_locally=false ;;
 	*) AC_MSG_ERROR(bad value ${enableval} for --enable-local-xmms-plugin) ;;
 esac],[install_xmms_plugin_locally=false])
 AM_CONDITIONAL(FLaC__INSTALL_XMMS_PLUGIN_LOCALLY, test "x$install_xmms_plugin_locally" = xtrue)

 AC_ARG_ENABLE(xmms-plugin,
 AC_HELP_STRING([--disable-xmms-plugin], [Do not build XMMS plugin]),
 [case "${enableval}" in
 	yes) enable_xmms_plugin=true ;;
 	no)  enable_xmms_plugin=false ;;
 	*) AC_MSG_ERROR(bad value ${enableval} for --enable-xmms-plugin) ;;
 esac],[enable_xmms_plugin=true])
 if test "x$enable_xmms_plugin" != xfalse ; then
 	AM_PATH_XMMS(0.9.5.1, , AC_MSG_WARN([*** XMMS >= 0.9.5.1 not installed - XMMS support will not be built]))
 fi
 AM_CONDITIONAL(FLaC__HAS_XMMS, test -n "$XMMS_INPUT_PLUGIN_DIR")

 dnl build FLAC++ or not
 AC_ARG_ENABLE([cpplibs],
 AC_HELP_STRING([--disable-cpplibs], [Do not build libFLAC++]),
 [case "${enableval}" in
 	yes) disable_cpplibs=false ;;
 	no)  disable_cpplibs=true ;;
 	*)   AC_MSG_ERROR(bad value ${enableval} for --enable-cpplibs) ;;
 esac], [disable_cpplibs=false])
 AM_CONDITIONAL(FLaC__WITH_CPPLIBS, [test "x$disable_cpplibs" != xtrue])

 dnl check for ogg library
 AC_ARG_ENABLE([ogg],
 	AC_HELP_STRING([--disable-ogg], [Disable ogg support (default: test for libogg)]),
 	[ want_ogg=$enableval ], [ want_ogg=yes ] )

 if test "x$want_ogg" != "xno"; then
 	XIPH_PATH_OGG(have_ogg=yes, AC_MSG_WARN([*** Ogg development environment not installed - Ogg support will not be built]))
 fi

 FLAC__HAS_OGG=0
 AM_CONDITIONAL(FLaC__HAS_OGG, [test "x$have_ogg" = xyes])
 if test "x$have_ogg" = xyes ; then
 	FLAC__HAS_OGG=1
 	OGG_PACKAGE="ogg"
 else
 	have_ogg=no
 fi
 AC_DEFINE_UNQUOTED([FLAC__HAS_OGG],$FLAC__HAS_OGG,[define if you have the ogg library])
 AC_SUBST(FLAC__HAS_OGG)
 AC_SUBST(OGG_PACKAGE)

 dnl Build examples?
 AC_ARG_ENABLE([examples],
 	AS_HELP_STRING([--disable-examples], [Don't build and install examples]))
 AM_CONDITIONAL([EXAMPLES], [test "x$enable_examples" != "xno"])

 dnl check for i18n(internationalization); these are from libiconv/gettext
 AM_ICONV
 AM_LANGINFO_CODESET

 AC_CHECK_PROGS(DOCBOOK_TO_MAN, docbook-to-man docbook2man)
 AM_CONDITIONAL(FLaC__HAS_DOCBOOK_TO_MAN, test -n "$DOCBOOK_TO_MAN")
 if test -n "$DOCBOOK_TO_MAN" ; then
 AC_DEFINE(FLAC__HAS_DOCBOOK_TO_MAN)
 AH_TEMPLATE(FLAC__HAS_DOCBOOK_TO_MAN, [define if you have docbook-to-man or docbook2man])
 fi

 AC_CHECK_LIB(rt, clock_gettime,
         LIB_CLOCK_GETTIME=-lrt
         AC_DEFINE(HAVE_CLOCK_GETTIME)
         AH_TEMPLATE(HAVE_CLOCK_GETTIME, [define if you have clock_gettime]))
 AC_SUBST(LIB_CLOCK_GETTIME)

 # only matters for x86
 AC_CHECK_PROGS(NASM, nasm)
 AM_CONDITIONAL(FLaC__HAS_NASM, test -n "$NASM")
 if test -n "$NASM" ; then
 AC_DEFINE(FLAC__HAS_NASM)
 AH_TEMPLATE(FLAC__HAS_NASM, [define if you are compiling for x86 and have the NASM assembler])
 fi

 dnl If debugging is disabled AND no CFLAGS/CXXFLAGS/CPPFLAGS/LDFLAGS
 dnl are provided, we can set defaults to our liking
 AS_IF([test "x${ax_enable_debug}" = "xno" && test "x${enable_flags_setting}" = "xyes"], [
 	CFLAGS="-O3 -funroll-loops"
 	CXXFLAGS="-O3"
 ])

 XIPH_GCC_VERSION dnl Sets a non-zero GCC_XXX_VERSION for gcc, not clang. checks below rely on that..

 if test x$ac_cv_c_compiler_gnu = xyes -o x$xiph_cv_c_compiler_clang = xyes ; then
 	CFLAGS="$CFLAGS -Wall -Wextra -Wstrict-prototypes -Wmissing-prototypes -Waggregate-return -Wcast-align -Wnested-externs -Wshadow -Wundef -Wmissing-declarations -Winline " # -Wcast-qual -Wbad-function-cast -Wwrite-strings -Wconversion
 	CXXFLAGS="$CXXFLAGS -Wall -Wextra -Wcast-align -Wshadow -Wwrite-strings -Wctor-dtor-privacy -Wnon-virtual-dtor -Wreorder -Wsign-promo -Wundef " # -Wcast-qual -Wbad-function-cast -Wwrite-strings -Woverloaded-virtual -Wmissing-declarations

 	XIPH_ADD_CFLAGS([-Wdeclaration-after-statement])

 	dnl some distributions (such as Gentoo) have _FORTIFY_SOURCE always
 	dnl enabled. We test for this situation in order to prevent polluting
 	dnl the console with messages of macro redefinitions.
 	AX_ADD_FORTIFY_SOURCE

 	AC_LANG_PUSH([C++])
 	XIPH_ADD_CXXFLAGS([-Weffc++])
 	AC_LANG_POP([C++])

 	if test x$xiph_cv_c_compiler_clang = xyes -a "$OBJ_FORMAT" = elf; then
 		CPPFLAGS="$CPPFLAGS -DFLAC__USE_VISIBILITY_ATTR"
 		CFLAGS="$CFLAGS -fvisibility=hidden"
 		CXXFLAGS="$CXXFLAGS -fvisibility=hidden"
 	elif test "$GCC_MAJOR_VERSION" -ge 4 && test "$OBJ_FORMAT" = elf; then
 		CPPFLAGS="$CPPFLAGS -DFLAC__USE_VISIBILITY_ATTR"
 		CFLAGS="$CFLAGS -fvisibility=hidden"
 		CXXFLAGS="$CXXFLAGS -fvisibility=hidden"
 		fi


 	if test x$xiph_cv_c_compiler_clang = xyes -a "$OBJ_FORMAT" = macho; then
 		CPPFLAGS="$CPPFLAGS -DFLAC__USE_VISIBILITY_ATTR"
 		CFLAGS="$CFLAGS -fvisibility=hidden"
 		CXXFLAGS="$CXXFLAGS -fvisibility=hidden"
 	elif test "$GCC_MAJOR_VERSION" -ge 4 && test "$OBJ_FORMAT" = macho; then
 		CPPFLAGS="$CPPFLAGS -DFLAC__USE_VISIBILITY_ATTR"
 		CFLAGS="$CFLAGS -fvisibility=hidden"
 		CXXFLAGS="$CXXFLAGS -fvisibility=hidden"
 		fi

 	if test "x$GCC_MAJOR_VERSION$GCC_MINOR_VERSION" = "x42" ; then
 		XIPH_ADD_CFLAGS([-fgnu89-inline])
 		fi

 	if test "x$GCC_MAJOR_VERSION$GCC_MINOR_VERSION" = "x47" ; then
 		XIPH_ADD_CFLAGS([-fno-inline-small-functions])
 		fi

 	if test "x$asm_optimisation$sse_os" = "xyesyes" ; then
 		XIPH_ADD_CFLAGS([-msse2])
 		fi

 	fi

 case "$host_os" in
 	"mingw32"|"os2")
 	if test "$host_cpu" = "i686"; then
 		XIPH_ADD_CFLAGS([-mstackrealign])
 		fi
 	esac

 if test x$enable_werror = "xyes" ; then
 	XIPH_ADD_CFLAGS([-Werror])
 	AC_LANG_PUSH([C++])
 	XIPH_ADD_CXXFLAGS([-Werror])
 	AC_LANG_POP([C++])
 	fi

 if test x$enable_stack_smash_protection = "xyes" ; then
 	XIPH_GCC_STACK_PROTECTOR
 	XIPH_GXX_STACK_PROTECTOR
 	fi

 AH_VERBATIM([FLAC_API_EXPORTS],
 [/* libtool defines DLL_EXPORT for windows dll builds,
    but flac code relies on FLAC_API_EXPORTS instead. */
 #ifdef DLL_EXPORT
 #ifdef __cplusplus
 # define FLACPP_API_EXPORTS
 #else
 # define FLAC_API_EXPORTS
 #endif
 #endif])

 if test x$enable_shared != "xyes" ; then
 dnl for correct FLAC_API
 	CPPFLAGS="-DFLAC__NO_DLL $CPPFLAGS"
 	fi

 AC_CONFIG_FILES([ \
 	Makefile \
 	src/Makefile \
 	src/libFLAC/Makefile \
 	src/libFLAC/flac.pc \
 	src/libFLAC/ia32/Makefile \
 	src/libFLAC/include/Makefile \
 	src/libFLAC/include/private/Makefile \
 	src/libFLAC/include/protected/Makefile \
 	src/libFLAC++/Makefile \
 	src/libFLAC++/flac++.pc \
 	src/flac/Makefile \
 	src/metaflac/Makefile \
 	src/plugin_common/Makefile \
 	src/plugin_xmms/Makefile \
 	src/share/Makefile \
 	src/test_grabbag/Makefile \
 	src/test_grabbag/cuesheet/Makefile \
 	src/test_grabbag/picture/Makefile \
 	src/test_libs_common/Makefile \
 	src/test_libFLAC/Makefile \
 	src/test_libFLAC++/Makefile \
 	src/test_seeking/Makefile \
 	src/test_streams/Makefile \
 	src/utils/Makefile \
 	src/utils/flacdiff/Makefile \
 	src/utils/flactimer/Makefile \
 	examples/Makefile \
 	examples/c/Makefile \
 	examples/c/decode/Makefile \
 	examples/c/decode/file/Makefile \
 	examples/c/encode/Makefile \
 	examples/c/encode/file/Makefile \
 	examples/cpp/Makefile \
 	examples/cpp/decode/Makefile \
 	examples/cpp/decode/file/Makefile \
 	examples/cpp/encode/Makefile \
 	examples/cpp/encode/file/Makefile \
 	include/Makefile \
 	include/FLAC/Makefile \
 	include/FLAC++/Makefile \
 	include/share/Makefile \
 	include/share/grabbag/Makefile \
 	include/test_libs_common/Makefile \
 	doc/Doxyfile \
 	doc/Makefile \
 	doc/html/Makefile \
 	doc/html/images/Makefile \
 	m4/Makefile \
 	man/Makefile \
 	test/common.sh \
 	test/Makefile \
 	test/cuesheets/Makefile \
 	test/flac-to-flac-metadata-test-files/Makefile \
 	test/metaflac-test-files/Makefile \
 	test/pictures/Makefile \
 	build/Makefile \
 	microbench/Makefile
 ])
 AC_OUTPUT

 AC_MSG_RESULT([
 -=-=-=-=-=-=-=-=-=-= Configuration Complete =-=-=-=-=-=-=-=-=-=-

   Configuration summary :

     FLAC version : ........................ ${VERSION}

     Host CPU : ............................ ${host_cpu}
     Host Vendor : ......................... ${host_vendor}
     Host OS : ............................. ${host_os}
 ])

 	echo "    Compiler is GCC : ..................... ${ac_cv_c_compiler_gnu}"
 if test x$ac_cv_c_compiler_gnu = xyes ; then
 	echo "    GCC version : ......................... ${GCC_VERSION}"
 fi
 	echo "    Compiler is Clang : ................... ${xiph_cv_c_compiler_clang}"
 	echo "    SSE optimizations : ................... ${sse_os}"
 	echo "    Asm optimizations : ................... ${asm_optimisation}"
 	echo "    Ogg/FLAC support : .................... ${have_ogg}"
 echo
	# FLAC - Free Lossless Audio Codec
	# Copyright (C) 2001,2002,2003,2004,2005,2006,2007,2008,2009 Josh Coalson
	#
	# This file is part the FLAC project. FLAC is comprised of several
	# components distributed under different licenses. The codec libraries
	# are distributed under Xiph.Org's BSD-like license (see the file
	# COPYING.Xiph in this distribution). All other programs, libraries, and
	# plugins are distributed under the GPL (see COPYING.GPL). The documentation
	# is distributed under the Gnu FDL (see COPYING.FDL). Each file in the
	# FLAC distribution contains at the top the terms under which it may be
	# distributed.
	#
	# Since this particular file is relevant to all components of FLAC,
	# it may be distributed under the Xiph.Org license, which is the least
	# restrictive of those mentioned above. See the file COPYING.Xiph in this
	# distribution.

	# NOTE that for many of the AM_CONDITIONALs we use the prefix FLaC__
	# instead of FLAC__ since autoconf triggers off 'AC_' in strings

	AC_PREREQ(2.60)
	AC_INIT([flac], [1.3.3], [flac-dev@xiph.org], [flac], [https://www.xiph.org/flac/])
	AC_CONFIG_HEADERS([config.h])
	AC_CONFIG_SRCDIR([src/flac/main.c])
	AC_CONFIG_MACRO_DIR([m4])
	AM_INIT_AUTOMAKE([foreign 1.10 -Wall tar-pax no-dist-gzip dist-xz subdir-objects])
	m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

	AC_MSG_CHECKING([whether configure should try to set CFLAGS/CXXFLAGS/CPPFLAGS/LDFLAGS])
	AS_IF([test "x${CFLAGS+set}" = "xset" \|\| test "x${CXXFLAGS+set}" = "xset" \|\| test "x${CPPFLAGS+set}" = "xset" \|\| test "x${LDFLAGS+set}" = "xset"],
	[enable_flags_setting=no],
	[enable_flags_setting=yes]
	)
	AC_MSG_RESULT([${enable_flags_setting}])
	AX_CHECK_ENABLE_DEBUG
	user_cflags=$CFLAGS

	#Prefer whatever the current ISO standard is.
	AC_PROG_CC_STDC
	AC_USE_SYSTEM_EXTENSIONS
	m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
	LT_INIT([win32-dll disable-static pic-only])
	AM_PROG_AS
	AC_PROG_CXX
	XIPH_C_COMPILER_IS_CLANG
	XIPH_GCC_REALLY_IS_GCC
	AC_PROG_MAKE_SET
	AC_PROG_MKDIR_P

	AC_SYS_LARGEFILE
	AC_FUNC_FSEEKO

	AC_CHECK_SIZEOF(off_t,1) # Fake default value.
	AC_CHECK_SIZEOF([void*])
	AC_SEARCH_LIBS([lround],[m], [AC_DEFINE(HAVE_LROUND,1,lround support)])

	AC_LANG_PUSH([C++])
	# c++ flavor first
	AC_C_VARARRAYS
	if test $ac_cv_c_vararrays = yes; then
	AC_DEFINE([HAVE_CXX_VARARRAYS], 1, [Define to 1 if C++ supports variable-length arrays.])
	fi
	AC_LANG_POP([C++])

	# c flavor
	AC_HEADER_STDC
	AM_PROG_CC_C_O
	AC_C_INLINE
	AC_C_VARARRAYS
	AC_C_TYPEOF

	AC_CHECK_HEADERS([stdint.h inttypes.h byteswap.h sys/param.h sys/ioctl.h termios.h x86intrin.h cpuid.h])

	XIPH_C_BSWAP32
	XIPH_C_BSWAP16

	ac_cv_c_big_endian=0
	ac_cv_c_little_endian=0
	AC_C_BIGENDIAN([ac_cv_c_big_endian=1], [ac_cv_c_little_endian=1], [
	AC_MSG_WARN([[*****************************************************************]])
	AC_MSG_WARN([[*** Not able to determine endian-ness of target processor. ]])
	AC_MSG_WARN([[*** The constants CPU_IS_BIG_ENDIAN and CPU_IS_LITTLE_ENDIAN in ]])
	AC_MSG_WARN([[*** config.h may need to be hand editied. ]])
	AC_MSG_WARN([[*****************************************************************]])
	])
	AC_DEFINE_UNQUOTED(CPU_IS_BIG_ENDIAN, ${ac_cv_c_big_endian},
	[Target processor is big endian.])
	AC_DEFINE_UNQUOTED(CPU_IS_LITTLE_ENDIAN, ${ac_cv_c_little_endian},
	[Target processor is little endian.])
	AC_DEFINE_UNQUOTED(WORDS_BIGENDIAN, ${ac_cv_c_big_endian},
	[Target processor is big endian.])

	AC_ARG_ENABLE(asm-optimizations, AC_HELP_STRING([--disable-asm-optimizations], [Don't use any assembly optimization routines]), asm_opt=no, asm_opt=yes)
	dnl ' Terminate the damn single quote
	AM_CONDITIONAL(FLaC__NO_ASM, test "x$asm_opt" = xno)
	if test "x$asm_opt" = xno ; then
	AC_DEFINE(FLAC__NO_ASM)
	AH_TEMPLATE(FLAC__NO_ASM, [define to disable use of assembly code])
	fi

	# For the XMMS plugin.
	AC_CHECK_TYPES(socklen_t, [], [])

	dnl check for getopt in standard library
	dnl AC_CHECK_FUNCS(getopt_long , , [LIBOBJS="$LIBOBJS getopt.o getopt1.o"] )
	AC_CHECK_FUNCS(getopt_long, [], [])

	AC_CHECK_SIZEOF(void*,1)

	asm_optimisation=no
	case "$host_cpu" in
	amd64\|x86_64)
	case "$host" in
	*gnux32)
	# x32 user space and 64 bit kernel.
	cpu_x86_64=true
	AC_DEFINE(FLAC__CPU_X86_64)
	AH_TEMPLATE(FLAC__CPU_X86_64, [define if building for x86_64])
	asm_optimisation=$asm_opt
	;;
	*)
	if test $ac_cv_sizeof_voidp = 4 ; then
	# This must be a 32 bit user space running on 64 bit kernel so treat
	# this as ia32.
	cpu_ia32=true
	AC_DEFINE(FLAC__CPU_IA32)
	AH_TEMPLATE(FLAC__CPU_IA32, [define if building for ia32/i386])
	else
	# x86_64 user space and kernel.
	cpu_x86_64=true
	AC_DEFINE(FLAC__CPU_X86_64)
	AH_TEMPLATE(FLAC__CPU_X86_64, [define if building for x86_64])
	fi
	asm_optimisation=$asm_opt
	;;
	esac
	;;
	i*86)
	cpu_ia32=true
	AC_DEFINE(FLAC__CPU_IA32)
	AH_TEMPLATE(FLAC__CPU_IA32, [define if building for ia32/i386])
	asm_optimisation=$asm_opt
	;;
	powerpc64\|powerpc64le)
	cpu_ppc64=true
	cpu_ppc=true
	AC_CHECK_HEADER(sys/auxv.h, AC_DEFINE(FLAC__CPU_PPC))
	AH_TEMPLATE(FLAC__CPU_PPC, [define if building for PowerPC])
	AC_DEFINE(FLAC__CPU_PPC64)
	AH_TEMPLATE(FLAC__CPU_PPC64, [define if building for PowerPC64])
	asm_optimisation=$asm_opt
	;;
	powerpc\|powerpcle)
	cpu_ppc=true
	AC_CHECK_HEADER(sys/auxv.h, AC_DEFINE(FLAC__CPU_PPC))
	AH_TEMPLATE(FLAC__CPU_PPC, [define if building for PowerPC])
	asm_optimisation=$asm_opt
	;;
	sparc)
	cpu_sparc=true
	AC_DEFINE(FLAC__CPU_SPARC)
	AH_TEMPLATE(FLAC__CPU_SPARC, [define if building for SPARC])
	asm_optimisation=$asm_opt
	;;
	esac
	AM_CONDITIONAL(FLAC__CPU_X86_64, test "x$cpu_x86_64" = xtrue)
	AM_CONDITIONAL(FLaC__CPU_IA32, test "x$cpu_ia32" = xtrue)
	AM_CONDITIONAL(FLaC__CPU_PPC, test "x$cpu_ppc" = xtrue)
	AM_CONDITIONAL(FLaC__CPU_PPC64, test "x$cpu_ppc64" = xtrue)
	AM_CONDITIONAL(FLaC__CPU_SPARC, test "x$cpu_sparc" = xtrue)

	if test "x$ac_cv_header_x86intrin_h" = xyes; then
	AC_DEFINE([FLAC__HAS_X86INTRIN], 1, [Set to 1 if <x86intrin.h> is available.])
	else
	AC_DEFINE([FLAC__HAS_X86INTRIN], 0)
	fi

	if test x"$cpu_ppc64" = xtrue ; then

	AC_C_ATTRIBUTE([target("cpu=power8")],
	[have_cpu_power8=yes],
	[have_cpu_power8=no])
	if test x"$have_cpu_power8" = xyes ; then
	AC_DEFINE(FLAC__HAS_TARGET_POWER8)
	AH_TEMPLATE(FLAC__HAS_TARGET_POWER8, [define if compiler has __attribute__((target("cpu=power8"))) support])
	fi

	AC_C_ATTRIBUTE([target("cpu=power9")],
	[have_cpu_power9=yes],
	[have_cpu_power9=no])
	if test x"$have_cpu_power9" = xyes ; then
	AC_DEFINE(FLAC__HAS_TARGET_POWER9)
	AH_TEMPLATE(FLAC__HAS_TARGET_POWER9, [define if compiler has __attribute__((target("cpu=power9"))) support])
	fi

	fi

	case "$host" in
	i386-*-openbsd3.[[0-3]]) OBJ_FORMAT=aoutb ;;
	--cygwin\|mingw) OBJ_FORMAT=win32 ;;
	--darwin*) OBJ_FORMAT=macho ;;
	emx) OBJ_FORMAT=aout ;;
	*djgpp) OBJ_FORMAT=coff ;;
	*) OBJ_FORMAT=elf ;;
	esac
	AC_SUBST(OBJ_FORMAT)

	os_is_windows=no
	case "$host" in
	mingw)
	CPPFLAGS="-D__MSVCRT_VERSION__=0x0601 $CPPFLAGS"
	os_is_windows=yes
	;;
	esac

	AM_CONDITIONAL(OS_IS_WINDOWS, test "x$os_is_windows" = xyes)

	case "$host" in
	-linux-)
	sys_linux=true
	AC_DEFINE(FLAC__SYS_LINUX)
	AH_TEMPLATE(FLAC__SYS_LINUX, [define if building for Linux])
	;;
	--darwin*)
	sys_darwin=true
	AC_DEFINE(FLAC__SYS_DARWIN)
	AH_TEMPLATE(FLAC__SYS_DARWIN, [define if building for Darwin / MacOS X])
	;;
	esac
	AM_CONDITIONAL(FLaC__SYS_DARWIN, test "x$sys_darwin" = xtrue)
	AM_CONDITIONAL(FLaC__SYS_LINUX, test "x$sys_linux" = xtrue)

	if test "x$cpu_ia32" = xtrue \|\| test "x$cpu_x86_64" = xtrue ; then
	AC_DEFINE(FLAC__ALIGN_MALLOC_DATA)
	AH_TEMPLATE(FLAC__ALIGN_MALLOC_DATA, [define to align allocated memory on 32-byte boundaries])
	fi

	AM_CONDITIONAL([DEBUG], [test "x${ax_enable_debug}" = "xyes" \|\| test "x${ax_enable_debug}" = "xinfo"])

	AC_ARG_ENABLE(sse,
	AC_HELP_STRING([--disable-sse], [Disable passing of -msse2 to the compiler]),
	[case "${enableval}" in
	yes) sse_os=yes ;;
	no) sse_os=no ;;
	*) AC_MSG_ERROR(bad value ${enableval} for --enable-sse) ;;
	esac],[sse_os=yes])

	AC_ARG_ENABLE(altivec,
	AC_HELP_STRING([--disable-altivec], [Disable Altivec optimizations]),
	[case "${enableval}" in
	yes) use_altivec=true ;;
	no) use_altivec=false ;;
	*) AC_MSG_ERROR(bad value ${enableval} for --enable-altivec) ;;
	esac],[use_altivec=true])
	AM_CONDITIONAL(FLaC__USE_ALTIVEC, test "x$use_altivec" = xtrue)
	if test "x$use_altivec" = xtrue ; then
	AC_DEFINE(FLAC__USE_ALTIVEC)
	AH_TEMPLATE(FLAC__USE_ALTIVEC, [define to enable use of Altivec instructions])
	fi

	AC_ARG_ENABLE(vsx,
	AC_HELP_STRING([--disable-vsx], [Disable VSX optimizations]),
	[case "${enableval}" in
	yes) use_vsx=true ;;
	no) use_vsx=false ;;
	*) AC_MSG_ERROR(bad value ${enableval} for --enable-vsx) ;;
	esac],[use_vsx=true])
	AM_CONDITIONAL(FLaC__USE_VSX, test "x$use_vsx" = xtrue)
	if test "x$use_vsx" = xtrue ; then
	AC_DEFINE(FLAC__USE_VSX)
	AH_TEMPLATE(FLAC__USE_VSX, [define to enable use of VSX instructions])
	fi

	AC_ARG_ENABLE(avx,
	AC_HELP_STRING([--disable-avx], [Disable AVX, AVX2 optimizations]),
	[case "${enableval}" in
	yes) use_avx=true ;;
	no) use_avx=false ;;
	*) AC_MSG_ERROR(bad value ${enableval} for --enable-avx) ;;
	esac],[use_avx=true])
	AM_CONDITIONAL(FLaC__USE_AVX, test "x$use_avx" = xtrue)
	if test "x$use_avx" = xtrue ; then
	AC_DEFINE(FLAC__USE_AVX)
	AH_TEMPLATE(FLAC__USE_AVX, [define to enable use of AVX instructions])
	fi

	AC_ARG_ENABLE(thorough-tests,
	AC_HELP_STRING([--disable-thorough-tests], [Disable thorough (long) testing, do only basic tests]),
	[case "${enableval}" in
	yes) thorough_tests=true ;;
	no) thorough_tests=false ;;
	*) AC_MSG_ERROR(bad value ${enableval} for --enable-thorough-tests) ;;
	esac],[thorough_tests=true])
	AC_ARG_ENABLE(exhaustive-tests,
	AC_HELP_STRING([--enable-exhaustive-tests], [Enable exhaustive testing (VERY long)]),
	[case "${enableval}" in
	yes) exhaustive_tests=true ;;
	no) exhaustive_tests=false ;;
	*) AC_MSG_ERROR(bad value ${enableval} for --enable-exhaustive-tests) ;;
	esac],[exhaustive_tests=false])
	if test "x$thorough_tests" = xfalse ; then
	FLAC__TEST_LEVEL=0
	elif test "x$exhaustive_tests" = xfalse ; then
	FLAC__TEST_LEVEL=1
	else
	FLAC__TEST_LEVEL=2
	fi
	AC_SUBST(FLAC__TEST_LEVEL)

	AC_ARG_ENABLE(werror,
	AC_HELP_STRING([--enable-werror], [Enable -Werror in all Makefiles]))

	AC_ARG_ENABLE(stack-smash-protection,
	AC_HELP_STRING([--enable-stack-smash-protection], [Enable GNU GCC stack smash protection]))

	AC_ARG_ENABLE(64-bit-words,
	AC_HELP_STRING([--enable-64-bit-words], [Set FLAC__BYTES_PER_WORD to 8 (4 is the default)]))
	if test "x$enable_64_bit_words" = xyes ; then
	AC_DEFINE_UNQUOTED([ENABLE_64_BIT_WORDS],1,[Set FLAC__BYTES_PER_WORD to 8 (4 is the default)])
	else
	AC_DEFINE_UNQUOTED([ENABLE_64_BIT_WORDS],0)
	fi
	AC_SUBST(ENABLE_64_BIT_WORDS)

	AC_ARG_ENABLE(valgrind-testing,
	AC_HELP_STRING([--enable-valgrind-testing], [Run all tests inside Valgrind]),
	[case "${enableval}" in
	yes) FLAC__TEST_WITH_VALGRIND=yes ;;
	no) FLAC__TEST_WITH_VALGRIND=no ;;
	*) AC_MSG_ERROR(bad value ${enableval} for --enable-valgrind-testing) ;;
	esac],[FLAC__TEST_WITH_VALGRIND=no])
	AC_SUBST(FLAC__TEST_WITH_VALGRIND)

	AC_ARG_ENABLE(doxygen-docs,
	AC_HELP_STRING([--disable-doxygen-docs], [Disable API documentation building via Doxygen]),
	[case "${enableval}" in
	yes) enable_doxygen_docs=true ;;
	no) enable_doxygen_docs=false ;;
	*) AC_MSG_ERROR(bad value ${enableval} for --enable-doxygen-docs) ;;
	esac],[enable_doxygen_docs=true])
	if test "x$enable_doxygen_docs" != xfalse ; then
	AC_CHECK_PROGS(DOXYGEN, doxygen)
	fi
	AM_CONDITIONAL(FLaC__HAS_DOXYGEN, test -n "$DOXYGEN")

	AC_ARG_ENABLE(local-xmms-plugin,
	AC_HELP_STRING([--enable-local-xmms-plugin], [Install XMMS plugin to ~/.xmms/Plugins instead of system location]),
	[case "${enableval}" in
	yes) install_xmms_plugin_locally=true ;;
	no) install_xmms_plugin_locally=false ;;
	*) AC_MSG_ERROR(bad value ${enableval} for --enable-local-xmms-plugin) ;;
	esac],[install_xmms_plugin_locally=false])
	AM_CONDITIONAL(FLaC__INSTALL_XMMS_PLUGIN_LOCALLY, test "x$install_xmms_plugin_locally" = xtrue)

	AC_ARG_ENABLE(xmms-plugin,
	AC_HELP_STRING([--disable-xmms-plugin], [Do not build XMMS plugin]),
	[case "${enableval}" in
	yes) enable_xmms_plugin=true ;;
	no) enable_xmms_plugin=false ;;
	*) AC_MSG_ERROR(bad value ${enableval} for --enable-xmms-plugin) ;;
	esac],[enable_xmms_plugin=true])
	if test "x$enable_xmms_plugin" != xfalse ; then
	AM_PATH_XMMS(0.9.5.1, , AC_MSG_WARN([*** XMMS >= 0.9.5.1 not installed - XMMS support will not be built]))
	fi
	AM_CONDITIONAL(FLaC__HAS_XMMS, test -n "$XMMS_INPUT_PLUGIN_DIR")

	dnl build FLAC++ or not
	AC_ARG_ENABLE([cpplibs],
	AC_HELP_STRING([--disable-cpplibs], [Do not build libFLAC++]),
	[case "${enableval}" in
	yes) disable_cpplibs=false ;;
	no) disable_cpplibs=true ;;
	*) AC_MSG_ERROR(bad value ${enableval} for --enable-cpplibs) ;;
	esac], [disable_cpplibs=false])
	AM_CONDITIONAL(FLaC__WITH_CPPLIBS, [test "x$disable_cpplibs" != xtrue])

	dnl check for ogg library
	AC_ARG_ENABLE([ogg],
	AC_HELP_STRING([--disable-ogg], [Disable ogg support (default: test for libogg)]),
	[ want_ogg=$enableval ], [ want_ogg=yes ] )

	if test "x$want_ogg" != "xno"; then
	XIPH_PATH_OGG(have_ogg=yes, AC_MSG_WARN([*** Ogg development environment not installed - Ogg support will not be built]))
	fi

	FLAC__HAS_OGG=0
	AM_CONDITIONAL(FLaC__HAS_OGG, [test "x$have_ogg" = xyes])
	if test "x$have_ogg" = xyes ; then
	FLAC__HAS_OGG=1
	OGG_PACKAGE="ogg"
	else
	have_ogg=no
	fi
	AC_DEFINE_UNQUOTED([FLAC__HAS_OGG],$FLAC__HAS_OGG,[define if you have the ogg library])
	AC_SUBST(FLAC__HAS_OGG)
	AC_SUBST(OGG_PACKAGE)

	dnl Build examples?
	AC_ARG_ENABLE([examples],
	AS_HELP_STRING([--disable-examples], [Don't build and install examples]))
	AM_CONDITIONAL([EXAMPLES], [test "x$enable_examples" != "xno"])

	dnl check for i18n(internationalization); these are from libiconv/gettext
	AM_ICONV
	AM_LANGINFO_CODESET

	AC_CHECK_PROGS(DOCBOOK_TO_MAN, docbook-to-man docbook2man)
	AM_CONDITIONAL(FLaC__HAS_DOCBOOK_TO_MAN, test -n "$DOCBOOK_TO_MAN")
	if test -n "$DOCBOOK_TO_MAN" ; then
	AC_DEFINE(FLAC__HAS_DOCBOOK_TO_MAN)
	AH_TEMPLATE(FLAC__HAS_DOCBOOK_TO_MAN, [define if you have docbook-to-man or docbook2man])
	fi

	AC_CHECK_LIB(rt, clock_gettime,
	LIB_CLOCK_GETTIME=-lrt
	AC_DEFINE(HAVE_CLOCK_GETTIME)
	AH_TEMPLATE(HAVE_CLOCK_GETTIME, [define if you have clock_gettime]))
	AC_SUBST(LIB_CLOCK_GETTIME)

	# only matters for x86
	AC_CHECK_PROGS(NASM, nasm)
	AM_CONDITIONAL(FLaC__HAS_NASM, test -n "$NASM")
	if test -n "$NASM" ; then
	AC_DEFINE(FLAC__HAS_NASM)
	AH_TEMPLATE(FLAC__HAS_NASM, [define if you are compiling for x86 and have the NASM assembler])
	fi

	dnl If debugging is disabled AND no CFLAGS/CXXFLAGS/CPPFLAGS/LDFLAGS
	dnl are provided, we can set defaults to our liking
	AS_IF([test "x${ax_enable_debug}" = "xno" && test "x${enable_flags_setting}" = "xyes"], [
	CFLAGS="-O3 -funroll-loops"
	CXXFLAGS="-O3"
	])

	XIPH_GCC_VERSION dnl Sets a non-zero GCC_XXX_VERSION for gcc, not clang. checks below rely on that..

	if test x$ac_cv_c_compiler_gnu = xyes -o x$xiph_cv_c_compiler_clang = xyes ; then
	CFLAGS="$CFLAGS -Wall -Wextra -Wstrict-prototypes -Wmissing-prototypes -Waggregate-return -Wcast-align -Wnested-externs -Wshadow -Wundef -Wmissing-declarations -Winline " # -Wcast-qual -Wbad-function-cast -Wwrite-strings -Wconversion
	CXXFLAGS="$CXXFLAGS -Wall -Wextra -Wcast-align -Wshadow -Wwrite-strings -Wctor-dtor-privacy -Wnon-virtual-dtor -Wreorder -Wsign-promo -Wundef " # -Wcast-qual -Wbad-function-cast -Wwrite-strings -Woverloaded-virtual -Wmissing-declarations

	XIPH_ADD_CFLAGS([-Wdeclaration-after-statement])

	dnl some distributions (such as Gentoo) have _FORTIFY_SOURCE always
	dnl enabled. We test for this situation in order to prevent polluting
	dnl the console with messages of macro redefinitions.
	AX_ADD_FORTIFY_SOURCE

	AC_LANG_PUSH([C++])
	XIPH_ADD_CXXFLAGS([-Weffc++])
	AC_LANG_POP([C++])

	if test x$xiph_cv_c_compiler_clang = xyes -a "$OBJ_FORMAT" = elf; then
	CPPFLAGS="$CPPFLAGS -DFLAC__USE_VISIBILITY_ATTR"
	CFLAGS="$CFLAGS -fvisibility=hidden"
	CXXFLAGS="$CXXFLAGS -fvisibility=hidden"
	elif test "$GCC_MAJOR_VERSION" -ge 4 && test "$OBJ_FORMAT" = elf; then
	CPPFLAGS="$CPPFLAGS -DFLAC__USE_VISIBILITY_ATTR"
	CFLAGS="$CFLAGS -fvisibility=hidden"
	CXXFLAGS="$CXXFLAGS -fvisibility=hidden"
	fi


	if test x$xiph_cv_c_compiler_clang = xyes -a "$OBJ_FORMAT" = macho; then
	CPPFLAGS="$CPPFLAGS -DFLAC__USE_VISIBILITY_ATTR"
	CFLAGS="$CFLAGS -fvisibility=hidden"
	CXXFLAGS="$CXXFLAGS -fvisibility=hidden"
	elif test "$GCC_MAJOR_VERSION" -ge 4 && test "$OBJ_FORMAT" = macho; then
	CPPFLAGS="$CPPFLAGS -DFLAC__USE_VISIBILITY_ATTR"
	CFLAGS="$CFLAGS -fvisibility=hidden"
	CXXFLAGS="$CXXFLAGS -fvisibility=hidden"
	fi

	if test "x$GCC_MAJOR_VERSION$GCC_MINOR_VERSION" = "x42" ; then
	XIPH_ADD_CFLAGS([-fgnu89-inline])
	fi

	if test "x$GCC_MAJOR_VERSION$GCC_MINOR_VERSION" = "x47" ; then
	XIPH_ADD_CFLAGS([-fno-inline-small-functions])
	fi

	if test "x$asm_optimisation$sse_os" = "xyesyes" ; then
	XIPH_ADD_CFLAGS([-msse2])
	fi

	fi

	case "$host_os" in
	"mingw32"\|"os2")
	if test "$host_cpu" = "i686"; then
	XIPH_ADD_CFLAGS([-mstackrealign])
	fi
	esac

	if test x$enable_werror = "xyes" ; then
	XIPH_ADD_CFLAGS([-Werror])
	AC_LANG_PUSH([C++])
	XIPH_ADD_CXXFLAGS([-Werror])
	AC_LANG_POP([C++])
	fi

	if test x$enable_stack_smash_protection = "xyes" ; then
	XIPH_GCC_STACK_PROTECTOR
	XIPH_GXX_STACK_PROTECTOR
	fi

	AH_VERBATIM([FLAC_API_EXPORTS],
	[/* libtool defines DLL_EXPORT for windows dll builds,
	but flac code relies on FLAC_API_EXPORTS instead. */
	#ifdef DLL_EXPORT
	#ifdef __cplusplus
	# define FLACPP_API_EXPORTS
	#else
	# define FLAC_API_EXPORTS
	#endif
	#endif])

	if test x$enable_shared != "xyes" ; then
	dnl for correct FLAC_API
	CPPFLAGS="-DFLAC__NO_DLL $CPPFLAGS"
	fi

	AC_CONFIG_FILES([ \
	Makefile \
	src/Makefile \
	src/libFLAC/Makefile \
	src/libFLAC/flac.pc \
	src/libFLAC/ia32/Makefile \
	src/libFLAC/include/Makefile \
	src/libFLAC/include/private/Makefile \
	src/libFLAC/include/protected/Makefile \
	src/libFLAC++/Makefile \
	src/libFLAC++/flac++.pc \
	src/flac/Makefile \
	src/metaflac/Makefile \
	src/plugin_common/Makefile \
	src/plugin_xmms/Makefile \
	src/share/Makefile \
	src/test_grabbag/Makefile \
	src/test_grabbag/cuesheet/Makefile \
	src/test_grabbag/picture/Makefile \
	src/test_libs_common/Makefile \
	src/test_libFLAC/Makefile \
	src/test_libFLAC++/Makefile \
	src/test_seeking/Makefile \
	src/test_streams/Makefile \
	src/utils/Makefile \
	src/utils/flacdiff/Makefile \
	src/utils/flactimer/Makefile \
	examples/Makefile \
	examples/c/Makefile \
	examples/c/decode/Makefile \
	examples/c/decode/file/Makefile \
	examples/c/encode/Makefile \
	examples/c/encode/file/Makefile \
	examples/cpp/Makefile \
	examples/cpp/decode/Makefile \
	examples/cpp/decode/file/Makefile \
	examples/cpp/encode/Makefile \
	examples/cpp/encode/file/Makefile \
	include/Makefile \
	include/FLAC/Makefile \
	include/FLAC++/Makefile \
	include/share/Makefile \
	include/share/grabbag/Makefile \
	include/test_libs_common/Makefile \
	doc/Doxyfile \
	doc/Makefile \
	doc/html/Makefile \
	doc/html/images/Makefile \
	m4/Makefile \
	man/Makefile \
	test/common.sh \
	test/Makefile \
	test/cuesheets/Makefile \
	test/flac-to-flac-metadata-test-files/Makefile \
	test/metaflac-test-files/Makefile \
	test/pictures/Makefile \
	build/Makefile \
	microbench/Makefile
	])
	AC_OUTPUT

	AC_MSG_RESULT([
	-=-=-=-=-=-=-=-=-=-= Configuration Complete =-=-=-=-=-=-=-=-=-=-

	Configuration summary :

	FLAC version : ........................ ${VERSION}

	Host CPU : ............................ ${host_cpu}
	Host Vendor : ......................... ${host_vendor}
	Host OS : ............................. ${host_os}
	])

	echo " Compiler is GCC : ..................... ${ac_cv_c_compiler_gnu}"
	if test x$ac_cv_c_compiler_gnu = xyes ; then
	echo " GCC version : ......................... ${GCC_VERSION}"
	fi
	echo " Compiler is Clang : ................... ${xiph_cv_c_compiler_clang}"
	echo " SSE optimizations : ................... ${sse_os}"
	echo " Asm optimizations : ................... ${asm_optimisation}"
	echo " Ogg/FLAC support : .................... ${have_ogg}"
	echo