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opus/configure.ac
Ron 2f2f9d63b8 Fully automate version updating 
This one meets or exceeds the following requirements:

 - Version is checked/updated for every build action when in the git repo.
   Does not require the user to re- ./configure to get the correct version.

 - Version is not updated automatically when using exported tarball source.
   Avoids accidentally getting a wrong version from some other git repo in
   a parent directory of the source, and allows setting the correct version
   for distro package exports.

 - Automatic updating can be manually suppressed.
   For developers doing lots of change/rebuild cycles they don't plan to
   release, when they don't want a full rebuild triggered for every commit,
   and again for every change made immediately after a commit.
   The version will still always be updated if they do a `make dist`.

 - Does not require any manual updating of versions in the mainline git
   repo for each release aside from normal tagging.  The version is
   recorded in one file only, that is automatically generated and will
   never need to be committed.

 - Does not require gnu-make features for the autoconf builds.

It does not currently:

 - Keep a checksum of every source file in tarball releases to mangle the
   version if people modify the tarball source.  Responsible people can
   manually update the version easily though in such cases.

The version.mk file is now only used by the VC project files.  Once they
are updated to use the package_version file too, then it can be deleted
from the repository.
2013-05-11 02:05:24 +09:30

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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_s([ 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"
warn_CFLAGS="-Wall -Wextra -Wcast-align -Wnested-externs -Wshadow -Wstrict-prototypes"
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $warn_CFLAGS"
AC_MSG_CHECKING([if ${CC} supports ${warn_CFLAGS}])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([char foo;])],
[ AC_MSG_RESULT([yes])
EXTRA_WARNS=$warn_CFLAGS ],
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";
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