Add copy of opus library in deps/third_party.

opus/configure.ac

+dnl Process this file with autoconf to produce a configure script. -*-m4-*-
+
+AC_INIT(src/opus_encoder.c)
+
+AM_CONFIG_HEADER([config.h])
+
+dnl enable silent rules on automake 1.11 and later
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
+
+# Read our default version string from version.mk.
+# Please update this file for releases.
+AC_MSG_CHECKING([version.mk])
+MK_VERSION=$(awk 'BEGIN { FS = "=" }
+                  /OPUS_VERSION/ { ver = $2}
+                  END {
+                        gsub(/"/, "", ver);
+                        gsub(/^ /, "", ver);
+                        gsub(/ $/, "", ver);
+                        print ver;
+                  }' $srcdir/version.mk)
+if test -z "$MK_VERSION"; then
+  AC_MSG_RESULT([no])
+else
+  AC_MSG_RESULT([$MK_VERSION])
+  OPUS_VERSION="$MK_VERSION"
+fi
+
+# Override with the git version, if available.
+AC_MSG_CHECKING([git revision])
+GIT_VERSION=$(git describe --tags --match 'v*' 2>/dev/null | sed 's/^v//')
+if test -z "$GIT_VERSION"; then
+  AC_MSG_RESULT([no])
+else
+  AC_MSG_RESULT([$GIT_VERSION])
+  OPUS_VERSION="$GIT_VERSION"
+fi
+
+# Use 'unknown' if all else fails.
+if test -z "$OPUS_VERSION"; then
+  OPUS_VERSION="unknown"
+fi
+
+# For automake.
+PACKAGE=opus
+VERSION=$OPUS_VERSION
+
+# For autoconf
+AC_SUBST(OPUS_VERSION)
+
+# For config.h.
+AC_DEFINE_UNQUOTED([OPUS_VERSION], ["$OPUS_VERSION"],
+                   [Opus library version string])
+
+# For libtool.
+dnl Please update these for releases.
+OPUS_LT_CURRENT=2
+OPUS_LT_REVISION=0
+OPUS_LT_AGE=2
+
+AC_SUBST(OPUS_LT_CURRENT)
+AC_SUBST(OPUS_LT_REVISION)
+AC_SUBST(OPUS_LT_AGE)
+
+AM_INIT_AUTOMAKE($PACKAGE, $VERSION, no-define)
+AM_MAINTAINER_MODE
+
+AC_CANONICAL_HOST
+AC_MINGW32
+AM_PROG_LIBTOOL
+AM_PROG_CC_C_O
+
+AC_PROG_CC_C99
+AC_C_BIGENDIAN
+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 "$enableval" = yes; then
+  ac_enable_fixed="yes";
+  ac_enable_float="no";
+  AC_DEFINE([FIXED_POINT], [1], [Compile as fixed-point (for machines without a fast enough FPU)])
+else
+  AC_DEFINE([FLOATING_POINT], , [Compile as floating-point (for machines with a fast enough FPU)])
+fi],
+AC_DEFINE([FLOATING_POINT], , [Compile as floating-point (for machines with a fast enough FPU)]))
+
+ac_enable_fixed_debug="no"
+AC_ARG_ENABLE(fixed-point-debug, [  --enable-fixed-point-debug debug fixed-point implementation],
+[if test "$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])
+
+AC_OUTPUT([Makefile opus.pc opus-uninstalled.pc
+           doc/Makefile doc/Doxyfile])
+
+AC_MSG_RESULT([
+------------------------------------------------------------------------
+  $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";