diff --git a/dnn/AUTHORS b/dnn/AUTHORS
new file mode 100644
index 0000000000000000000000000000000000000000..8ee917e51119ee9d995fcaaf231f25988b73c828
--- /dev/null
+++ b/dnn/AUTHORS
@@ -0,0 +1,2 @@
+Jean-Marc Valin <jmvalin@jmvalin.ca>
+David Rowe <david@rowetel.com>
diff --git a/dnn/Makefile.am b/dnn/Makefile.am
new file mode 100644
index 0000000000000000000000000000000000000000..f31a470b84a7d6c82a79674c7673d86eb60dc54f
--- /dev/null
+++ b/dnn/Makefile.am
@@ -0,0 +1,129 @@
+ACLOCAL_AMFLAGS = -I m4
+
+AM_CFLAGS = -I$(top_srcdir)/include $(DEPS_CFLAGS)
+
+dist_doc_DATA = COPYING AUTHORS README
+
+include_HEADERS = include/rnnoise.h
+
+lib_LTLIBRARIES = librnnoise.la
+noinst_HEADERS = arch.h \
+ celt_lpc.h \
+ common.h \
+ _kiss_fft_guts.h \
+ kiss_fft.h \
+ opus_types.h \
+ pitch.h \
+ rnn_data.h \
+ rnn.h \
+ tansig_table.h
+
+librnnoise_la_SOURCES = \
+ denoise.c \
+ rnn.c \
+ rnn_data.c \
+ pitch.c \
+ kiss_fft.c \
+ celt_lpc.c
+
+librnnoise_la_LIBADD = $(DEPS_LIBS) $(lrintf_lib) $(LIBM)
+librnnoise_la_LDFLAGS = -no-undefined \
+ -version-info @OP_LT_CURRENT@:@OP_LT_REVISION@:@OP_LT_AGE@
+
+if OP_ENABLE_EXAMPLES
+noinst_PROGRAMS = examples/rnnoise_demo
+endif
+
+examples_rnnoise_demo_SOURCES = examples/rnnoise_demo.c
+examples_rnnoise_demo_LDADD = librnnoise.la
+
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = rnnoise.pc
+
+debug:
+ $(MAKE) CFLAGS="${CFLAGS} -O0 -ggdb -DOP_ENABLE_ASSERTIONS" all
+
+EXTRA_DIST = \
+ rnnoise.pc.in \
+ rnnoise-uninstalled.pc.in \
+ doc/Doxyfile.in \
+ doc/Makefile
+
+# Targets to build and install just the library without the docs
+librnnoise install-librnnoise: NO_DOXYGEN = 1
+
+rnnoise: all
+install-rnnoise: install
+
+# Or just the docs
+docs: doc/doxygen-build.stamp
+
+install-docs:
+ @if [ -z "$(NO_DOXYGEN)" ]; then \
+ ( cd doc && \
+ echo "Installing documentation in $(DESTDIR)$(docdir)"; \
+ $(INSTALL) -d $(DESTDIR)$(docdir)/html/search; \
+ for f in `find html -type f \! -name "installdox"` ; do \
+ $(INSTALL_DATA) $$f $(DESTDIR)$(docdir)/$$f; \
+ done ) \
+ fi
+
+doc/doxygen-build.stamp: doc/Doxyfile \
+ $(top_srcdir)/include/*.h
+ @[ -n "$(NO_DOXYGEN)" ] || ( cd doc && doxygen && touch $(@F) )
+
+
+if HAVE_DOXYGEN
+
+# Or everything (by default)
+all-local: docs
+
+install-data-local: install-docs
+
+clean-local:
+ $(RM) -r doc/html
+ $(RM) -r doc/latex
+ $(RM) doc/doxygen-build.stamp
+
+uninstall-local:
+ $(RM) -r $(DESTDIR)$(docdir)/html
+
+endif
+
+# We check this every time make is run, with configure.ac being touched to
+# trigger an update of the build system files if update_version changes the
+# current PACKAGE_VERSION (or if package_version was modified manually by a
+# user with either AUTO_UPDATE=no or no update_version script present - the
+# latter being the normal case for tarball releases).
+#
+# We can't just add the package_version file to CONFIGURE_DEPENDENCIES since
+# simply running autoconf will not actually regenerate configure for us when
+# the content of that file changes (due to autoconf dependency checking not
+# knowing about that without us creating yet another file for it to include).
+#
+# The MAKECMDGOALS check is a gnu-make'ism, but will degrade 'gracefully' for
+# makes that don't support it. The only loss of functionality is not forcing
+# an update of package_version for `make dist` if AUTO_UPDATE=no, but that is
+# unlikely to be a real problem for any real user.
+$(top_srcdir)/configure.ac: force
+ @case "$(MAKECMDGOALS)" in \
+ dist-hook) exit 0 ;; \
+ dist-* | dist | distcheck | distclean) _arg=release ;; \
+ esac; \
+ if ! $(top_srcdir)/update_version $$_arg 2> /dev/null; then \
+ if [ ! -e $(top_srcdir)/package_version ]; then \
+ echo 'PACKAGE_VERSION="unknown"' > $(top_srcdir)/package_version; \
+ fi; \
+ . $(top_srcdir)/package_version || exit 1; \
+ [ "$(PACKAGE_VERSION)" != "$$PACKAGE_VERSION" ] || exit 0; \
+ fi; \
+ touch $@
+
+force:
+
+# Create a minimal package_version file when make dist is run.
+dist-hook:
+ echo 'PACKAGE_VERSION="$(PACKAGE_VERSION)"' > $(top_distdir)/package_version
+
+
+.PHONY: rnnoise install-rnnoise docs install-docs
diff --git a/dnn/autogen.sh b/dnn/autogen.sh
new file mode 100755
index 0000000000000000000000000000000000000000..9378677691d51a7b48aa3c4eda1635559f69eacf
--- /dev/null
+++ b/dnn/autogen.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+# Run this to set up the build system: configure, makefiles, etc.
+set -e
+
+srcdir=`dirname $0`
+test -n "$srcdir" && cd "$srcdir"
+
+echo "Updating build configuration files for rnnoise, please wait...."
+
+autoreconf -isf
diff --git a/dnn/configure.ac b/dnn/configure.ac
new file mode 100644
index 0000000000000000000000000000000000000000..70af13a18595ce5a28a4279e0ed2e3cf16e49e0b
--- /dev/null
+++ b/dnn/configure.ac
@@ -0,0 +1,129 @@
+# autoconf source script for generating configure
+
+dnl The package_version file will be automatically synced to the git revision
+dnl by the update_version script when configured in the repository, but will
+dnl remain constant in tarball releases unless it is manually edited.
+m4_define([CURRENT_VERSION],
+ m4_esyscmd([ ./update_version 2>/dev/null || true
+ if test -e package_version; then
+ . ./package_version
+ printf "$PACKAGE_VERSION"
+ else
+ printf "unknown"
+ fi ]))
+
+AC_INIT([rnnoise],[CURRENT_VERSION],[jmvalin@jmvalin.ca])
+AC_CONFIG_SRCDIR([denoise.c])
+AC_CONFIG_MACRO_DIR([m4])
+
+AC_USE_SYSTEM_EXTENSIONS
+AC_SYS_LARGEFILE
+
+AM_INIT_AUTOMAKE([1.11 foreign no-define dist-zip subdir-objects])
+AM_MAINTAINER_MODE([enable])
+
+AC_C_INLINE
+
+LT_INIT
+
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
+
+AC_DEFINE([RNNOISE_BUILD], [], [This is a build of the library])
+
+dnl Library versioning for libtool.
+dnl Please update these for releases.
+dnl CURRENT, REVISION, AGE
+dnl - library source changed -> increment REVISION
+dnl - interfaces added/removed/changed -> increment CURRENT, REVISION = 0
+dnl - interfaces added -> increment AGE
+dnl - interfaces removed -> AGE = 0
+
+OP_LT_CURRENT=4
+OP_LT_REVISION=1
+OP_LT_AGE=4
+
+AC_SUBST(OP_LT_CURRENT)
+AC_SUBST(OP_LT_REVISION)
+AC_SUBST(OP_LT_AGE)
+
+CC_CHECK_CFLAGS_APPEND(
+ [-pedantic -Wall -Wextra -Wno-sign-compare -Wno-parentheses -Wno-long-long])
+
+# Platform-specific tweaks
+case $host in
+ *-mingw*)
+ # -std=c89 causes some warnings under mingw.
+ CC_CHECK_CFLAGS_APPEND([-U__STRICT_ANSI__])
+ # We need WINNT>=0x501 (WindowsXP) for getaddrinfo/freeaddrinfo.
+ # It's okay to define this even when HTTP support is disabled, as it only
+ # affects header declarations, not linking (unless we actually use some
+ # XP-only functions).
+ AC_DEFINE_UNQUOTED(_WIN32_WINNT,0x501,
+ [We need at least WindowsXP for getaddrinfo/freeaddrinfo])
+ host_mingw=true
+ ;;
+esac
+AM_CONDITIONAL(OP_WIN32, test "$host_mingw" = "true")
+
+AC_ARG_ENABLE([assertions],
+ AS_HELP_STRING([--enable-assertions], [Enable assertions in code]),,
+ enable_assertions=no)
+
+AS_IF([test "$enable_assertions" = "yes"], [
+ AC_DEFINE([OP_ENABLE_ASSERTIONS], [1], [Enable assertions in code])
+])
+
+AC_ARG_ENABLE([examples],
+ AS_HELP_STRING([--disable-examples], [Do not build example applications]),,
+ enable_examples=yes)
+AM_CONDITIONAL([OP_ENABLE_EXAMPLES], [test "$enable_examples" = "yes"])
+
+AS_CASE(["$ac_cv_search_lrintf"],
+ ["no"],[],
+ ["none required"],[],
+ [lrintf_lib="$ac_cv_search_lrintf"])
+
+LT_LIB_M
+
+AC_SUBST([lrintf_lib])
+
+CC_ATTRIBUTE_VISIBILITY([default], [
+ CC_FLAG_VISIBILITY([CFLAGS="${CFLAGS} -fvisibility=hidden"])
+])
+
+dnl Check for doxygen
+AC_ARG_ENABLE([doc],
+ AS_HELP_STRING([--disable-doc], [Do not build API documentation]),,
+ [enable_doc=yes]
+)
+
+AS_IF([test "$enable_doc" = "yes"], [
+ AC_CHECK_PROG([HAVE_DOXYGEN], [doxygen], [yes], [no])
+ AC_CHECK_PROG([HAVE_DOT], [dot], [yes], [no])
+],[
+ HAVE_DOXYGEN=no
+])
+
+AM_CONDITIONAL([HAVE_DOXYGEN], [test "$HAVE_DOXYGEN" = "yes"])
+
+AC_CONFIG_FILES([
+ Makefile
+ rnnoise.pc
+ rnnoise-uninstalled.pc
+ doc/Doxyfile
+])
+AC_CONFIG_HEADERS([config.h])
+AC_OUTPUT
+
+AC_MSG_NOTICE([
+------------------------------------------------------------------------
+ $PACKAGE_NAME $PACKAGE_VERSION: Automatic configuration OK.
+
+ Assertions ................... ${enable_assertions}
+
+ Hidden visibility ............ ${cc_cv_flag_visibility}
+
+ API code examples ............ ${enable_examples}
+ API documentation ............ ${enable_doc}
+------------------------------------------------------------------------
+])
diff --git a/dnn/doc/Doxyfile.in b/dnn/doc/Doxyfile.in
new file mode 100644
index 0000000000000000000000000000000000000000..b5438b31eca4cdc0f291b63542c1d41270f3eaa5
--- /dev/null
+++ b/dnn/doc/Doxyfile.in
@@ -0,0 +1,18 @@
+# Process with doxygen to generate API documentation
+
+PROJECT_NAME = @PACKAGE_NAME@
+PROJECT_NUMBER = @PACKAGE_VERSION@
+PROJECT_BRIEF = "RNN-based noise suppressor."
+INPUT = @top_srcdir@/include/rnnoise.h
+OPTIMIZE_OUTPUT_FOR_C = YES
+
+QUIET = YES
+WARNINGS = YES
+WARN_IF_UNDOCUMENTED = YES
+WARN_IF_DOC_ERROR = YES
+WARN_NO_PARAMDOC = YES
+
+JAVADOC_AUTOBRIEF = YES
+SORT_MEMBER_DOCS = NO
+
+HAVE_DOT = @HAVE_DOT@
diff --git a/dnn/lpcnet-uninstalled.pc.in b/dnn/lpcnet-uninstalled.pc.in
new file mode 100644
index 0000000000000000000000000000000000000000..e2af62febfa6663ed1db8493327175aab3679550
--- /dev/null
+++ b/dnn/lpcnet-uninstalled.pc.in
@@ -0,0 +1,13 @@
+# rnnoise uninstalled pkg-config file
+
+prefix=
+exec_prefix=
+libdir=${pcfiledir}/.libs
+includedir=${pcfiledir}/@top_srcdir@/include
+
+Name: rnnoise uninstalled
+Description: RNN-based noise suppression (not installed)
+Version: @PACKAGE_VERSION@
+Conflicts:
+Libs: ${libdir}/librnnoise.la @lrintf_lib@
+Cflags: -I${includedir}
diff --git a/dnn/lpcnet.pc.in b/dnn/lpcnet.pc.in
new file mode 100644
index 0000000000000000000000000000000000000000..8c1325001bcd57122770a858c1d790e68ebfbaaf
--- /dev/null
+++ b/dnn/lpcnet.pc.in
@@ -0,0 +1,14 @@
+# rnnoise installed pkg-config file
+
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: rnnoise
+Description: RNN-based noise suppression
+Version: @PACKAGE_VERSION@
+Conflicts:
+Libs: -L${libdir} -lrnnoise
+Libs.private: @lrintf_lib@
+Cflags: -I${includedir}/
diff --git a/dnn/m4/attributes.m4 b/dnn/m4/attributes.m4
new file mode 100644
index 0000000000000000000000000000000000000000..ebc7347bd93b4700a8f7593301af1736dc318579
--- /dev/null
+++ b/dnn/m4/attributes.m4
@@ -0,0 +1,321 @@
+dnl Macros to check the presence of generic (non-typed) symbols.
+dnl Copyright (c) 2006-2007 Diego Pettenò <flameeyes@gmail.com>
+dnl Copyright (c) 2006-2007 xine project
+dnl
+dnl This program is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 2, or (at your option)
+dnl any later version.
+dnl
+dnl This program is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+dnl GNU General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl along with this program; if not, write to the Free Software
+dnl Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+dnl 02110-1301, USA.
+dnl
+dnl As a special exception, the copyright owners of the
+dnl macro gives unlimited permission to copy, distribute and modify the
+dnl configure scripts that are the output of Autoconf when processing the
+dnl Macro. You need not follow the terms of the GNU General Public
+dnl License when using or distributing such scripts, even though portions
+dnl of the text of the Macro appear in them. The GNU General Public
+dnl License (GPL) does govern all other use of the material that
+dnl constitutes the Autoconf Macro.
+dnl
+dnl This special exception to the GPL applies to versions of the
+dnl Autoconf Macro released by this project. When you make and
+dnl distribute a modified version of the Autoconf Macro, you may extend
+dnl this special exception to the GPL to apply to your modified version as
+dnl well.
+
+dnl Check if the flag is supported by compiler
+dnl CC_CHECK_CFLAGS_SILENT([FLAG], [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND])
+
+AC_DEFUN([CC_CHECK_CFLAGS_SILENT], [
+ AC_CACHE_VAL(AS_TR_SH([cc_cv_cflags_$1]),
+ [ac_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $1"
+ AC_LINK_IFELSE([AC_LANG_SOURCE([int main() { return 0; }])],
+ [eval "AS_TR_SH([cc_cv_cflags_$1])='yes'"],
+ [eval "AS_TR_SH([cc_cv_cflags_$1])='no'"])
+ CFLAGS="$ac_save_CFLAGS"
+ ])
+
+ AS_IF([eval test x$]AS_TR_SH([cc_cv_cflags_$1])[ = xyes],
+ [$2], [$3])
+])
+
+dnl Check if the flag is supported by compiler (cacheable)
+dnl CC_CHECK_CFLAGS([FLAG], [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND])
+
+AC_DEFUN([CC_CHECK_CFLAGS], [
+ AC_CACHE_CHECK([if $CC supports $1 flag],
+ AS_TR_SH([cc_cv_cflags_$1]),
+ CC_CHECK_CFLAGS_SILENT([$1]) dnl Don't execute actions here!
+ )
+
+ AS_IF([eval test x$]AS_TR_SH([cc_cv_cflags_$1])[ = xyes],
+ [$2], [$3])
+])
+
+dnl CC_CHECK_CFLAG_APPEND(FLAG, [action-if-found], [action-if-not-found])
+dnl Check for CFLAG and appends them to CFLAGS if supported
+AC_DEFUN([CC_CHECK_CFLAG_APPEND], [
+ AC_CACHE_CHECK([if $CC supports $1 flag],
+ AS_TR_SH([cc_cv_cflags_$1]),
+ CC_CHECK_CFLAGS_SILENT([$1]) dnl Don't execute actions here!
+ )
+
+ AS_IF([eval test x$]AS_TR_SH([cc_cv_cflags_$1])[ = xyes],
+ [CFLAGS="$CFLAGS $1"; $2], [$3])
+])
+
+dnl CC_CHECK_CFLAGS_APPEND([FLAG1 FLAG2], [action-if-found], [action-if-not])
+AC_DEFUN([CC_CHECK_CFLAGS_APPEND], [
+ for flag in $1; do
+ CC_CHECK_CFLAG_APPEND($flag, [$2], [$3])
+ done
+])
+
+dnl Check if the flag is supported by linker (cacheable)
+dnl CC_CHECK_LDFLAGS([FLAG], [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND])
+
+AC_DEFUN([CC_CHECK_LDFLAGS], [
+ AC_CACHE_CHECK([if $CC supports $1 flag],
+ AS_TR_SH([cc_cv_ldflags_$1]),
+ [ac_save_LDFLAGS="$LDFLAGS"
+ LDFLAGS="$LDFLAGS $1"
+ AC_LINK_IFELSE([AC_LANG_SOURCE([int main() { return 1; }])],
+ [eval "AS_TR_SH([cc_cv_ldflags_$1])='yes'"],
+ [eval "AS_TR_SH([cc_cv_ldflags_$1])="])
+ LDFLAGS="$ac_save_LDFLAGS"
+ ])
+
+ AS_IF([eval test x$]AS_TR_SH([cc_cv_ldflags_$1])[ = xyes],
+ [$2], [$3])
+])
+
+dnl define the LDFLAGS_NOUNDEFINED variable with the correct value for
+dnl the current linker to avoid undefined references in a shared object.
+AC_DEFUN([CC_NOUNDEFINED], [
+ dnl We check $host for which systems to enable this for.
+ AC_REQUIRE([AC_CANONICAL_HOST])
+
+ case $host in
+ dnl FreeBSD (et al.) does not complete linking for shared objects when pthreads
+ dnl are requested, as different implementations are present; to avoid problems
+ dnl use -Wl,-z,defs only for those platform not behaving this way.
+ *-freebsd* | *-openbsd*) ;;
+ *)
+ dnl First of all check for the --no-undefined variant of GNU ld. This allows
+ dnl for a much more readable commandline, so that people can understand what
+ dnl it does without going to look for what the heck -z defs does.
+ for possible_flags in "-Wl,--no-undefined" "-Wl,-z,defs"; do
+ CC_CHECK_LDFLAGS([$possible_flags], [LDFLAGS_NOUNDEFINED="$possible_flags"])
+ break
+ done
+ ;;
+ esac
+
+ AC_SUBST([LDFLAGS_NOUNDEFINED])
+])
+
+dnl Check for a -Werror flag or equivalent. -Werror is the GCC
+dnl and ICC flag that tells the compiler to treat all the warnings
+dnl as fatal. We usually need this option to make sure that some
+dnl constructs (like attributes) are not simply ignored.
+dnl
+dnl Other compilers don't support -Werror per se, but they support
+dnl an equivalent flag:
+dnl - Sun Studio compiler supports -errwarn=%all
+AC_DEFUN([CC_CHECK_WERROR], [
+ AC_CACHE_CHECK(
+ [for $CC way to treat warnings as errors],
+ [cc_cv_werror],
+ [CC_CHECK_CFLAGS_SILENT([-Werror], [cc_cv_werror=-Werror],
+ [CC_CHECK_CFLAGS_SILENT([-errwarn=%all], [cc_cv_werror=-errwarn=%all])])
+ ])
+])
+
+AC_DEFUN([CC_CHECK_ATTRIBUTE], [
+ AC_REQUIRE([CC_CHECK_WERROR])
+ AC_CACHE_CHECK([if $CC supports __attribute__(( ifelse([$2], , [$1], [$2]) ))],
+ AS_TR_SH([cc_cv_attribute_$1]),
+ [ac_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $cc_cv_werror"
+ AC_COMPILE_IFELSE([AC_LANG_SOURCE([$3])],
+ [eval "AS_TR_SH([cc_cv_attribute_$1])='yes'"],
+ [eval "AS_TR_SH([cc_cv_attribute_$1])='no'"])
+ CFLAGS="$ac_save_CFLAGS"
+ ])
+
+ AS_IF([eval test x$]AS_TR_SH([cc_cv_attribute_$1])[ = xyes],
+ [AC_DEFINE(
+ AS_TR_CPP([SUPPORT_ATTRIBUTE_$1]), 1,
+ [Define this if the compiler supports __attribute__(( ifelse([$2], , [$1], [$2]) ))]
+ )
+ $4],
+ [$5])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_CONSTRUCTOR], [
+ CC_CHECK_ATTRIBUTE(
+ [constructor],,
+ [extern void foo();
+ void __attribute__((constructor)) ctor() { foo(); }],
+ [$1], [$2])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_DESTRUCTOR], [
+ CC_CHECK_ATTRIBUTE(
+ [destructor],,
+ [extern void foo();
+ void __attribute__((destructor)) dtor() { foo(); }],
+ [$1], [$2])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_FORMAT], [
+ CC_CHECK_ATTRIBUTE(
+ [format], [format(printf, n, n)],
+ [void __attribute__((format(printf, 1, 2))) printflike(const char *fmt, ...) { fmt = (void *)0; }],
+ [$1], [$2])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_FORMAT_ARG], [
+ CC_CHECK_ATTRIBUTE(
+ [format_arg], [format_arg(printf)],
+ [char *__attribute__((format_arg(1))) gettextlike(const char *fmt) { fmt = (void *)0; }],
+ [$1], [$2])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_VISIBILITY], [
+ CC_CHECK_ATTRIBUTE(
+ [visibility_$1], [visibility("$1")],
+ [void __attribute__((visibility("$1"))) $1_function() { }],
+ [$2], [$3])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_NONNULL], [
+ CC_CHECK_ATTRIBUTE(
+ [nonnull], [nonnull()],
+ [void __attribute__((nonnull())) some_function(void *foo, void *bar) { foo = (void*)0; bar = (void*)0; }],
+ [$1], [$2])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_UNUSED], [
+ CC_CHECK_ATTRIBUTE(
+ [unused], ,
+ [void some_function(void *foo, __attribute__((unused)) void *bar);],
+ [$1], [$2])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_SENTINEL], [
+ CC_CHECK_ATTRIBUTE(
+ [sentinel], ,
+ [void some_function(void *foo, ...) __attribute__((sentinel));],
+ [$1], [$2])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_DEPRECATED], [
+ CC_CHECK_ATTRIBUTE(
+ [deprecated], ,
+ [void some_function(void *foo, ...) __attribute__((deprecated));],
+ [$1], [$2])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_ALIAS], [
+ CC_CHECK_ATTRIBUTE(
+ [alias], [weak, alias],
+ [void other_function(void *foo) { }
+ void some_function(void *foo) __attribute__((weak, alias("other_function")));],
+ [$1], [$2])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_MALLOC], [
+ CC_CHECK_ATTRIBUTE(
+ [malloc], ,
+ [void * __attribute__((malloc)) my_alloc(int n);],
+ [$1], [$2])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_PACKED], [
+ CC_CHECK_ATTRIBUTE(
+ [packed], ,
+ [struct astructure { char a; int b; long c; void *d; } __attribute__((packed));
+ char assert@<:@(sizeof(struct astructure) == (sizeof(char)+sizeof(int)+sizeof(long)+sizeof(void*)))-1@:>@;],
+ [$1], [$2])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_CONST], [
+ CC_CHECK_ATTRIBUTE(
+ [const], ,
+ [int __attribute__((const)) twopow(int n) { return 1 << n; } ],
+ [$1], [$2])
+])
+
+AC_DEFUN([CC_FLAG_VISIBILITY], [
+ AC_REQUIRE([CC_CHECK_WERROR])
+ AC_CACHE_CHECK([if $CC supports -fvisibility=hidden],
+ [cc_cv_flag_visibility],
+ [cc_flag_visibility_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $cc_cv_werror"
+ CC_CHECK_CFLAGS_SILENT([-fvisibility=hidden],
+ cc_cv_flag_visibility='yes',
+ cc_cv_flag_visibility='no')
+ CFLAGS="$cc_flag_visibility_save_CFLAGS"])
+
+ AS_IF([test "x$cc_cv_flag_visibility" = "xyes"],
+ [AC_DEFINE([SUPPORT_FLAG_VISIBILITY], 1,
+ [Define this if the compiler supports the -fvisibility flag])
+ $1],
+ [$2])
+])
+
+AC_DEFUN([CC_FUNC_EXPECT], [
+ AC_REQUIRE([CC_CHECK_WERROR])
+ AC_CACHE_CHECK([if compiler has __builtin_expect function],
+ [cc_cv_func_expect],
+ [ac_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $cc_cv_werror"
+ AC_COMPILE_IFELSE([AC_LANG_SOURCE(
+ [int some_function() {
+ int a = 3;
+ return (int)__builtin_expect(a, 3);
+ }])],
+ [cc_cv_func_expect=yes],
+ [cc_cv_func_expect=no])
+ CFLAGS="$ac_save_CFLAGS"
+ ])
+
+ AS_IF([test "x$cc_cv_func_expect" = "xyes"],
+ [AC_DEFINE([SUPPORT__BUILTIN_EXPECT], 1,
+ [Define this if the compiler supports __builtin_expect() function])
+ $1],
+ [$2])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_ALIGNED], [
+ AC_REQUIRE([CC_CHECK_WERROR])
+ AC_CACHE_CHECK([highest __attribute__ ((aligned ())) supported],
+ [cc_cv_attribute_aligned],
+ [ac_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $cc_cv_werror"
+ for cc_attribute_align_try in 64 32 16 8 4 2; do
+ AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+ int main() {
+ static char c __attribute__ ((aligned($cc_attribute_align_try))) = 0;
+ return c;
+ }])], [cc_cv_attribute_aligned=$cc_attribute_align_try; break])
+ done
+ CFLAGS="$ac_save_CFLAGS"
+ ])
+
+ if test "x$cc_cv_attribute_aligned" != "x"; then
+ AC_DEFINE_UNQUOTED([ATTRIBUTE_ALIGNED_MAX], [$cc_cv_attribute_aligned],
+ [Define the highest alignment supported])
+ fi
+])
diff --git a/dnn/update_version b/dnn/update_version
new file mode 100755
index 0000000000000000000000000000000000000000..a9999918d0f7e3cd52eb1c2cdbc70c1d85ccb226
--- /dev/null
+++ b/dnn/update_version
@@ -0,0 +1,65 @@
+#!/bin/bash
+
+# Creates and updates the package_version information used by configure.ac
+# (or other makefiles). When run inside a git repository it will use the
+# version information that can be queried from it unless AUTO_UPDATE is set
+# to 'no'. If no version is currently known it will be set to 'unknown'.
+#
+# If called with the argument 'release', the PACKAGE_VERSION will be updated
+# even if AUTO_UPDATE=no, but the value of AUTO_UPDATE shall be preserved.
+# This is used to force a version update whenever `make dist` is run.
+#
+# The exit status is 1 if package_version is not modified, else 0 is returned.
+#
+# This script should NOT be included in distributed tarballs, because if a
+# parent directory contains a git repository we do not want to accidentally
+# retrieve the version information from it instead. Tarballs should ship
+# with only the package_version file.
+#
+# Ron <ron@debian.org>, 2012.
+
+SRCDIR=$(dirname $0)
+
+if [ -e "$SRCDIR/package_version" ]; then
+ . "$SRCDIR/package_version"
+fi
+
+if [ "$AUTO_UPDATE" = no ]; then
+ [ "$1" = release ] || exit 1
+else
+ AUTO_UPDATE=yes
+fi
+
+# We run `git status` before describe here to ensure that we don't get a false
+# -dirty from files that have been touched but are not actually altered in the
+# working dir.
+GIT_VERSION=$(cd "$SRCDIR" && git status > /dev/null 2>&1 \
+ && git describe --tags --match 'v*' --dirty 2> /dev/null)
+GIT_VERSION=${GIT_VERSION#v}
+
+if [ -n "$GIT_VERSION" ]; then
+
+ [ "$GIT_VERSION" != "$PACKAGE_VERSION" ] || exit 1
+ PACKAGE_VERSION="$GIT_VERSION"
+
+elif [ -z "$PACKAGE_VERSION" ]; then
+ # No current package_version and no git ...
+ # We really shouldn't ever get here, because this script should only be
+ # included in the git repository, and should usually be export-ignored.
+ PACKAGE_VERSION="unknown"
+else
+ exit 1
+fi
+
+cat > "$SRCDIR/package_version" <<-EOF
+ # Automatically generated by update_version.
+ # This file may be sourced into a shell script or makefile.
+
+ # Set this to 'no' if you do not wish the version information
+ # to be checked and updated for every build. Most people will
+ # never want to change this, it is an option for developers
+ # making frequent changes that they know will not be released.
+ AUTO_UPDATE=$AUTO_UPDATE
+
+ PACKAGE_VERSION="$PACKAGE_VERSION"
+EOF