configure.ac - third_party/xiph/opus - Git at Google

 dnl Process this file with autoconf to produce a configure script. -*-m4-*-

 dnl The package_version file will be automatically synced to the git revision
 dnl by the update_version script when configured in the repository, but will
 dnl remain constant in tarball releases unless it is manually edited.
 m4_define([CURRENT_VERSION],
           m4_esyscmd([ if test -e package_version || ./update_version; then
                            . ./package_version
                            printf "$PACKAGE_VERSION"
                        else
                            printf "unknown"
                        fi ]))

 AC_INIT([opus],[CURRENT_VERSION],[opus@xiph.org])

 AC_CONFIG_SRCDIR(src/opus_encoder.c)

 dnl enable silent rules on automake 1.11 and later
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])


 # For libtool.
 dnl Please update these for releases.
 OPUS_LT_CURRENT=4
 OPUS_LT_REVISION=0
 OPUS_LT_AGE=4

 AC_SUBST(OPUS_LT_CURRENT)
 AC_SUBST(OPUS_LT_REVISION)
 AC_SUBST(OPUS_LT_AGE)

 AM_INIT_AUTOMAKE([no-define])
 AM_MAINTAINER_MODE([enable])

 AC_CANONICAL_HOST
 AC_MINGW32
 AM_PROG_LIBTOOL
 AM_PROG_CC_C_O

 AC_PROG_CC_C99
 AC_C_CONST
 AC_C_INLINE

 #Use a hacked up version of autoconf's AC_C_RESTRICT because it's not
 #strong enough a test to detect old buggy versions of GCC (e.g. 2.95.3)
 AC_CACHE_CHECK([for C/C++ restrict keyword], ac_cv_c_restrict,
   [ac_cv_c_restrict=no
    # The order here caters to the fact that C++ does not require restrict.
    for ac_kw in __restrict __restrict__ _Restrict restrict; do
      AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
       [[typedef int * int_ptr;
 	int foo (int_ptr $ac_kw ip, int * $ac_kw baz[]) {
 	return ip[0];
        }]],
       [[int s[1];
 	int * $ac_kw t = s;
 	t[0] = 0;
 	return foo(t, (void *)0)]])],
       [ac_cv_c_restrict=$ac_kw])
      test "$ac_cv_c_restrict" != no && break
    done
   ])
  AH_VERBATIM([restrict],
 [/* Define to the equivalent of the C99 'restrict' keyword, or to
    nothing if this is not supported.  Do not define if restrict is
    supported directly.  */
 #undef restrict
 /* Work around a bug in Sun C++: it does not support _Restrict or
    __restrict__, even though the corresponding Sun C compiler ends up with
    "#define restrict _Restrict" or "#define restrict __restrict__" in the
    previous line.  Perhaps some future version of Sun C++ will work with
    restrict; if so, hopefully it defines __RESTRICT like Sun C does.  */
 #if defined __SUNPRO_CC && !defined __RESTRICT
 # define _Restrict
 # define __restrict__
 #endif])
  case $ac_cv_c_restrict in
    restrict) ;;
    no) AC_DEFINE([restrict], []) ;;
    *)  AC_DEFINE_UNQUOTED([restrict], [$ac_cv_c_restrict]) ;;
  esac

 AC_DEFINE([OPUS_BUILD], [], [This is a build of OPUS])

 AC_MSG_CHECKING(for C99 variable-size arrays)
 AC_TRY_COMPILE( [], [static int x; char a[++x]; a[sizeof a - 1] = 0; int N; return a[0];],
 [has_var_arrays=yes;AC_DEFINE([VAR_ARRAYS], [], [Use C99 variable-size arrays])
 ],
 has_var_arrays=no
 )
 AC_MSG_RESULT($has_var_arrays)

 AC_CHECK_HEADERS([alloca.h getopt.h])
 AC_MSG_CHECKING(for alloca)
 AC_TRY_COMPILE( [#include <alloca.h>], [
 int foo=10;
 int *array = alloca(foo);
 ],
 [
 has_alloca=yes;
 if test x$has_var_arrays = "xno" ; then
 AC_DEFINE([USE_ALLOCA], [], [Make use of alloca])
 fi
 ],
 has_alloca=no
 )
 AC_MSG_RESULT($has_alloca)

 AC_CHECK_FUNC(exp,[fp_libm_not_needed=yes;LIBM=],[fp_libm_not_needed=dunno])
 if test x"$fp_libm_not_needed" = xdunno; then
   AC_CHECK_LIB([m], [exp], [LIBS="-lm $LIBS"; LIBM="-lm"],[LIBM=])
 fi
 AC_SUBST([LIBM])

 has_float_approx=no
 #case "$host_cpu" in
 #i[[3456]]86 | x86_64 | powerpc64 | powerpc32 | ia64)
 #  has_float_approx=yes
 #  ;;
 #esac

 ac_enable_fixed="no";
 ac_enable_float="yes";
 AC_ARG_ENABLE(fixed-point, [  --enable-fixed-point       compile without floating point (for machines without a fast enough FPU)],
 [if test "$enableval" = yes; then
   ac_enable_fixed="yes";
   ac_enable_float="no";
   AC_DEFINE([FIXED_POINT], [1], [Compile as fixed-point (for machines without a fast enough FPU)])
 fi])

 ac_enable_fixed_debug="no"
 AC_ARG_ENABLE(fixed-point-debug, [  --enable-fixed-point-debug debug fixed-point implementation],
 [if test "$enableval" = yes; then
   ac_enable_fixed_debug="yes"
   AC_DEFINE([FIXED_DEBUG], , [Debug fixed-point implementation])
 fi])

 ac_enable_custom_modes="no"
 AC_ARG_ENABLE(custom-modes, [  --enable-custom-modes      enable non-Opus modes, e.g. 44.1 kHz & 2^n frames],
 [if test "$enableval" = yes; then
   ac_enable_custom_modes="yes"
   AC_DEFINE([CUSTOM_MODES], , [Custom modes])
 fi])

 float_approx=$has_float_approx
 AC_ARG_ENABLE(float-approx, [  --enable-float-approx      enable fast approximations for floating point],
     [ if test "$enableval" = yes; then
     AC_WARN([Floating point approximations are not supported on all platforms.])
     float_approx=yes
     else
     float_approx=no
     fi], [ float_approx=$has_float_approx ])

 if test "x${float_approx}" = "xyes"; then
     AC_DEFINE([FLOAT_APPROX], , [Float approximations])
 fi

 ac_enable_assertions="no"
 AC_ARG_ENABLE(assertions, [  --enable-assertions        enable additional software error checking],
 [if test "$enableval" = yes; then
   ac_enable_assertions="yes"
   AC_DEFINE([ENABLE_ASSERTIONS], , [Assertions])
 fi])

 ac_enable_fuzzing="no"
 AC_ARG_ENABLE(fuzzing, [  --enable-fuzzing           causes the encoder to make random decisions],
 [if test "$enableval" = yes; then
   ac_enable_fuzzing="yes"
   AC_DEFINE([FUZZING], , [Fuzzing])
 fi])

 ac_enable_doc="yes"
 AC_ARG_ENABLE([doc],
   AS_HELP_STRING([--disable-doc], [Do not build API documentation]),
                  [ac_enable_doc=$enableval])
 AC_CHECK_PROG(HAVE_DOXYGEN, [doxygen], [yes], [no])
 if test "$HAVE_DOXYGEN" != "yes" -o "$ac_enable_doc" != "yes"; then
   HAVE_DOXYGEN="false"
   ac_enable_doc="no"
 fi
 AM_CONDITIONAL(HAVE_DOXYGEN, [test $HAVE_DOXYGEN = yes])

 saved_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -fvisibility=hidden"
 AC_MSG_CHECKING([if ${CC} supports -fvisibility=hidden])
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([char foo;])],
       [ AC_MSG_RESULT([yes])
         SYMBOL_VISIBILITY="-fvisibility=hidden" ],
         AC_MSG_RESULT([no]))
 CFLAGS="$saved_CFLAGS $SYMBOL_VISIBILITY"
 AC_SUBST(SYMBOL_VISIBILITY)

 CFLAGS="$CFLAGS -W"

 saved_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -Wall -Wextra -Wcast-align -Wnested-externs -Wshadow -Wstrict-prototypes"
 AC_MSG_CHECKING([if ${CC} supports -Wall -Wextra -Wcast-align -Wnested-externs -Wshadow -Wstrict-prototypes])
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([char foo;])],
       [ AC_MSG_RESULT([yes])
         EXTRA_WARNS="-Wall -Wextra -Wcast-align -Wnested-externs -Wshadow -Wstrict-prototypes" ],
         AC_MSG_RESULT([no]))
 CFLAGS="$saved_CFLAGS $EXTRA_WARNS"

 AC_CHECK_FUNCS([lrintf])
 AC_CHECK_FUNCS([lrint])
 AC_CHECK_FUNCS([__malloc_hook])

 AC_CHECK_SIZEOF(short)
 AC_CHECK_SIZEOF(int)
 AC_CHECK_SIZEOF(long)
 AC_CHECK_SIZEOF(long long)

 if test x$has_char16 = "xyes" ; then
         case 1 in
                 $ac_cv_sizeof_short) SIZE16="short";;
                 $ac_cv_sizeof_int) SIZE16="int";;
         esac
 else
         case 2 in
                 $ac_cv_sizeof_short) SIZE16="short";;
                 $ac_cv_sizeof_int) SIZE16="int";;
         esac
 fi

 if test x$has_char16 = "xyes" ; then
         case 2 in
                 $ac_cv_sizeof_int) SIZE32="int";;
                 $ac_cv_sizeof_long) SIZE32="long";;
                 $ac_cv_sizeof_short) SIZE32="short";;
         esac
 else
         case 4 in
                 $ac_cv_sizeof_int) SIZE32="int";;
                 $ac_cv_sizeof_long) SIZE32="long";;
                 $ac_cv_sizeof_short) SIZE32="short";;
         esac
 fi

 AC_SUBST(SIZE16)
 AC_SUBST(SIZE32)

 AM_CONDITIONAL([FIXED_POINT], [test x$ac_enable_fixed = xyes])
 AM_CONDITIONAL([CUSTOM_MODES], [test x$ac_enable_custom_modes = xyes])

 dnl subsitutions for the pkg-config files
 if test x$ac_enable_float = xyes; then
   PC_BUILD="floating-point"
   PC_LIBM=$LIBM
 else
   PC_BUILD="fixed-point"
   PC_LIBM=
 fi
 dnl opus_custom requires libm as well
 if test x$ac_enable_custom_modes = xyes; then
   PC_BUILD="${PC_BUILD}, custom modes"
   PC_LIBM=$LIBM
 fi
 AC_SUBST([PC_BUILD])
 AC_SUBST([PC_LIBM])


 AC_CONFIG_FILES([Makefile opus.pc opus-uninstalled.pc
                  doc/Makefile doc/Doxyfile])
 AC_CONFIG_HEADERS([config.h])

 AC_OUTPUT

 AC_MSG_RESULT([
 ------------------------------------------------------------------------
   $PACKAGE_NAME $PACKAGE_VERSION:  Automatic configuration OK.

     Compiler support:

       C99 var arrays: ................ ${has_var_arrays}
       C99 lrintf: .................... ${ac_cv_func_lrintf}
       Alloca: ........................ ${has_alloca}

     General configuration:

       Floating point support: ........ ${ac_enable_float}
       Fast float approximations: ..... ${float_approx}
       Fixed point debugging: ......... ${ac_enable_fixed_debug}
       Custom modes: .................. ${ac_enable_custom_modes}
       Assertion checking: ............ ${ac_enable_assertions}
       Fuzzing: ....................... ${ac_enable_fuzzing}

       API documentation: ............. ${ac_enable_doc}
 ------------------------------------------------------------------------
 ])

 echo "Type \"make; make install\" to compile and install";
 echo "Type \"make check\" to run the test suite";
	dnl Process this file with autoconf to produce a configure script. --m4--

	dnl The package_version file will be automatically synced to the git revision
	dnl by the update_version script when configured in the repository, but will
	dnl remain constant in tarball releases unless it is manually edited.
	m4_define([CURRENT_VERSION],
	m4_esyscmd([ if test -e package_version \|\| ./update_version; then
	. ./package_version
	printf "$PACKAGE_VERSION"
	else
	printf "unknown"
	fi ]))

	AC_INIT([opus],[CURRENT_VERSION],[opus@xiph.org])

	AC_CONFIG_SRCDIR(src/opus_encoder.c)

	dnl enable silent rules on automake 1.11 and later
	m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])


	# For libtool.
	dnl Please update these for releases.
	OPUS_LT_CURRENT=4
	OPUS_LT_REVISION=0
	OPUS_LT_AGE=4

	AC_SUBST(OPUS_LT_CURRENT)
	AC_SUBST(OPUS_LT_REVISION)
	AC_SUBST(OPUS_LT_AGE)

	AM_INIT_AUTOMAKE([no-define])
	AM_MAINTAINER_MODE([enable])

	AC_CANONICAL_HOST
	AC_MINGW32
	AM_PROG_LIBTOOL
	AM_PROG_CC_C_O

	AC_PROG_CC_C99
	AC_C_CONST
	AC_C_INLINE

	#Use a hacked up version of autoconf's AC_C_RESTRICT because it's not
	#strong enough a test to detect old buggy versions of GCC (e.g. 2.95.3)
	AC_CACHE_CHECK([for C/C++ restrict keyword], ac_cv_c_restrict,
	[ac_cv_c_restrict=no
	# The order here caters to the fact that C++ does not require restrict.
	for ac_kw in __restrict __restrict__ _Restrict restrict; do
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
	[[typedef int * int_ptr;
	int foo (int_ptr $ac_kw ip, int * $ac_kw baz[]) {
	return ip[0];
	}]],
	[[int s[1];
	int * $ac_kw t = s;
	t[0] = 0;
	return foo(t, (void *)0)]])],
	[ac_cv_c_restrict=$ac_kw])
	test "$ac_cv_c_restrict" != no && break
	done
	])
	AH_VERBATIM([restrict],
	[/* Define to the equivalent of the C99 'restrict' keyword, or to
	nothing if this is not supported. Do not define if restrict is
	supported directly. */
	#undef restrict
	/* Work around a bug in Sun C++: it does not support _Restrict or
	__restrict__, even though the corresponding Sun C compiler ends up with
	"#define restrict _Restrict" or "#define restrict __restrict__" in the
	previous line. Perhaps some future version of Sun C++ will work with
	restrict; if so, hopefully it defines __RESTRICT like Sun C does. */
	#if defined __SUNPRO_CC && !defined __RESTRICT
	# define _Restrict
	# define __restrict__
	#endif])
	case $ac_cv_c_restrict in
	restrict) ;;
	no) AC_DEFINE([restrict], []) ;;
	*) AC_DEFINE_UNQUOTED([restrict], [$ac_cv_c_restrict]) ;;
	esac

	AC_DEFINE([OPUS_BUILD], [], [This is a build of OPUS])

	AC_MSG_CHECKING(for C99 variable-size arrays)
	AC_TRY_COMPILE( [], [static int x; char a[++x]; a[sizeof a - 1] = 0; int N; return a[0];],
	[has_var_arrays=yes;AC_DEFINE([VAR_ARRAYS], [], [Use C99 variable-size arrays])
	],
	has_var_arrays=no
	)
	AC_MSG_RESULT($has_var_arrays)

	AC_CHECK_HEADERS([alloca.h getopt.h])
	AC_MSG_CHECKING(for alloca)
	AC_TRY_COMPILE( [#include <alloca.h>], [
	int foo=10;
	int *array = alloca(foo);
	],
	[
	has_alloca=yes;
	if test x$has_var_arrays = "xno" ; then
	AC_DEFINE([USE_ALLOCA], [], [Make use of alloca])
	fi
	],
	has_alloca=no
	)
	AC_MSG_RESULT($has_alloca)

	AC_CHECK_FUNC(exp,[fp_libm_not_needed=yes;LIBM=],[fp_libm_not_needed=dunno])
	if test x"$fp_libm_not_needed" = xdunno; then
	AC_CHECK_LIB([m], [exp], [LIBS="-lm $LIBS"; LIBM="-lm"],[LIBM=])
	fi
	AC_SUBST([LIBM])

	has_float_approx=no
	#case "$host_cpu" in
	#i[[3456]]86 \| x86_64 \| powerpc64 \| powerpc32 \| ia64)
	# has_float_approx=yes
	# ;;
	#esac

	ac_enable_fixed="no";
	ac_enable_float="yes";
	AC_ARG_ENABLE(fixed-point, [ --enable-fixed-point compile without floating point (for machines without a fast enough FPU)],
	[if test "$enableval" = yes; then
	ac_enable_fixed="yes";
	ac_enable_float="no";
	AC_DEFINE([FIXED_POINT], [1], [Compile as fixed-point (for machines without a fast enough FPU)])
	fi])

	ac_enable_fixed_debug="no"
	AC_ARG_ENABLE(fixed-point-debug, [ --enable-fixed-point-debug debug fixed-point implementation],
	[if test "$enableval" = yes; then
	ac_enable_fixed_debug="yes"
	AC_DEFINE([FIXED_DEBUG], , [Debug fixed-point implementation])
	fi])

	ac_enable_custom_modes="no"
	AC_ARG_ENABLE(custom-modes, [ --enable-custom-modes enable non-Opus modes, e.g. 44.1 kHz & 2^n frames],
	[if test "$enableval" = yes; then
	ac_enable_custom_modes="yes"
	AC_DEFINE([CUSTOM_MODES], , [Custom modes])
	fi])

	float_approx=$has_float_approx
	AC_ARG_ENABLE(float-approx, [ --enable-float-approx enable fast approximations for floating point],
	[ if test "$enableval" = yes; then
	AC_WARN([Floating point approximations are not supported on all platforms.])
	float_approx=yes
	else
	float_approx=no
	fi], [ float_approx=$has_float_approx ])

	if test "x${float_approx}" = "xyes"; then
	AC_DEFINE([FLOAT_APPROX], , [Float approximations])
	fi

	ac_enable_assertions="no"
	AC_ARG_ENABLE(assertions, [ --enable-assertions enable additional software error checking],
	[if test "$enableval" = yes; then
	ac_enable_assertions="yes"
	AC_DEFINE([ENABLE_ASSERTIONS], , [Assertions])
	fi])

	ac_enable_fuzzing="no"
	AC_ARG_ENABLE(fuzzing, [ --enable-fuzzing causes the encoder to make random decisions],
	[if test "$enableval" = yes; then
	ac_enable_fuzzing="yes"
	AC_DEFINE([FUZZING], , [Fuzzing])
	fi])

	ac_enable_doc="yes"
	AC_ARG_ENABLE([doc],
	AS_HELP_STRING([--disable-doc], [Do not build API documentation]),
	[ac_enable_doc=$enableval])
	AC_CHECK_PROG(HAVE_DOXYGEN, [doxygen], [yes], [no])
	if test "$HAVE_DOXYGEN" != "yes" -o "$ac_enable_doc" != "yes"; then
	HAVE_DOXYGEN="false"
	ac_enable_doc="no"
	fi
	AM_CONDITIONAL(HAVE_DOXYGEN, [test $HAVE_DOXYGEN = yes])

	saved_CFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS -fvisibility=hidden"
	AC_MSG_CHECKING([if ${CC} supports -fvisibility=hidden])
	AC_COMPILE_IFELSE([AC_LANG_SOURCE([char foo;])],
	[ AC_MSG_RESULT([yes])
	SYMBOL_VISIBILITY="-fvisibility=hidden" ],
	AC_MSG_RESULT([no]))
	CFLAGS="$saved_CFLAGS $SYMBOL_VISIBILITY"
	AC_SUBST(SYMBOL_VISIBILITY)

	CFLAGS="$CFLAGS -W"

	saved_CFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS -Wall -Wextra -Wcast-align -Wnested-externs -Wshadow -Wstrict-prototypes"
	AC_MSG_CHECKING([if ${CC} supports -Wall -Wextra -Wcast-align -Wnested-externs -Wshadow -Wstrict-prototypes])
	AC_COMPILE_IFELSE([AC_LANG_SOURCE([char foo;])],
	[ AC_MSG_RESULT([yes])
	EXTRA_WARNS="-Wall -Wextra -Wcast-align -Wnested-externs -Wshadow -Wstrict-prototypes" ],
	AC_MSG_RESULT([no]))
	CFLAGS="$saved_CFLAGS $EXTRA_WARNS"

	AC_CHECK_FUNCS([lrintf])
	AC_CHECK_FUNCS([lrint])
	AC_CHECK_FUNCS([__malloc_hook])

	AC_CHECK_SIZEOF(short)
	AC_CHECK_SIZEOF(int)
	AC_CHECK_SIZEOF(long)
	AC_CHECK_SIZEOF(long long)

	if test x$has_char16 = "xyes" ; then
	case 1 in
	$ac_cv_sizeof_short) SIZE16="short";;
	$ac_cv_sizeof_int) SIZE16="int";;
	esac
	else
	case 2 in
	$ac_cv_sizeof_short) SIZE16="short";;
	$ac_cv_sizeof_int) SIZE16="int";;
	esac
	fi

	if test x$has_char16 = "xyes" ; then
	case 2 in
	$ac_cv_sizeof_int) SIZE32="int";;
	$ac_cv_sizeof_long) SIZE32="long";;
	$ac_cv_sizeof_short) SIZE32="short";;
	esac
	else
	case 4 in
	$ac_cv_sizeof_int) SIZE32="int";;
	$ac_cv_sizeof_long) SIZE32="long";;
	$ac_cv_sizeof_short) SIZE32="short";;
	esac
	fi

	AC_SUBST(SIZE16)
	AC_SUBST(SIZE32)

	AM_CONDITIONAL([FIXED_POINT], [test x$ac_enable_fixed = xyes])
	AM_CONDITIONAL([CUSTOM_MODES], [test x$ac_enable_custom_modes = xyes])

	dnl subsitutions for the pkg-config files
	if test x$ac_enable_float = xyes; then
	PC_BUILD="floating-point"
	PC_LIBM=$LIBM
	else
	PC_BUILD="fixed-point"
	PC_LIBM=
	fi
	dnl opus_custom requires libm as well
	if test x$ac_enable_custom_modes = xyes; then
	PC_BUILD="${PC_BUILD}, custom modes"
	PC_LIBM=$LIBM
	fi
	AC_SUBST([PC_BUILD])
	AC_SUBST([PC_LIBM])


	AC_CONFIG_FILES([Makefile opus.pc opus-uninstalled.pc
	doc/Makefile doc/Doxyfile])
	AC_CONFIG_HEADERS([config.h])

	AC_OUTPUT

	AC_MSG_RESULT([
	------------------------------------------------------------------------
	$PACKAGE_NAME $PACKAGE_VERSION: Automatic configuration OK.

	Compiler support:

	C99 var arrays: ................ ${has_var_arrays}
	C99 lrintf: .................... ${ac_cv_func_lrintf}
	Alloca: ........................ ${has_alloca}

	General configuration:

	Floating point support: ........ ${ac_enable_float}
	Fast float approximations: ..... ${float_approx}
	Fixed point debugging: ......... ${ac_enable_fixed_debug}
	Custom modes: .................. ${ac_enable_custom_modes}
	Assertion checking: ............ ${ac_enable_assertions}
	Fuzzing: ....................... ${ac_enable_fuzzing}

	API documentation: ............. ${ac_enable_doc}
	------------------------------------------------------------------------
	])

	echo "Type \"make; make install\" to compile and install";
	echo "Type \"make check\" to run the test suite";