Squashed 'external/toxcore/c-toxcore/' changes from d9b8fa6098d..81b1e4f6348

81b1e4f6348 chore: Release v0.2.21-rc.1 9303e2e49a1 chore: Update the pkgsrc versions in the update-versions tool 71ec4b3b1e9 chore: Update the version-sync script to work in a post-tox.api.h world 66da842f753 chore: Add version update script compatible with ci-tools. 199878f7660 chore: Use new bazel script for circle ci. 8278e9cda46 chore: Add release issue template and workflow. a9bb3a1c4d1 chore: Fix alpine-s390x build. 6e0a641272e chore: Add a source tarball deploy workflow. 4adebe4d8b1 chore: Don't upload ios/macos variants in deploy workflows. 18f1d858ccb chore: Move one of the 3 freebsd builds to post-submit. 432ab60c002 feat: Add a Makefile for the single file deploy build. a86c0011fd5 chore: Add deploy job for single C file library. 2e7495e8f2a docs: Update changelog format to use the new clog-compatible way. a682da99e84 chore: Export wasmExports from the wasm binary. 12f34cdff27 chore: Add wasm to the nightly binary deploys. 1451029613f chore: Add strict-abi support for macOS/iOS. c53c30e09d9 chore: Add time option to manual fuzz trigger. 2ccecdc2a1a chore: Add remaining fuzz tests to cflite. 4626c2e230e test: Add a Net_Crypto fuzz test. b4a0e617c48 refactor: Use IP string length from ip_ntoa instead of strlen. b85b91f22f6 cleanup: rename getnodes/sendnodes to nodes request/response This change alignes the naming to be closer to the spec and make it less ambiguous. This change also changes the naming of some private/experimental marked APIs. - tox_callback_dht_nodes_response() - tox_dht_nodes_request() - Tox_Event_Dht_Get_Nodes_Response f1991aaa029 perf: Use stack allocation for strerror rendering. 3984211ccbf cleanup: remove kicked peers from saved peers list 26a991ed2be fix: ip to string function not accepting tcp families 712861f2e6d cleanup: Make websockify output qtox-compatible logging. 01932ea2f73 chore: Add opus and vpx to the toxcore wasm build. d29c42ef631 refactor: don't fully discard received DHT nodes. This is mostly forward thinking, where we might introduce other ip families, in addition to ipv4, ipv6, tcp_ipv4 etc. 21e2325934f chore: Fix xcframework tarball creation. b10c8b766ba chore: Fix xcframework checksum creation. 93787a9322e chore: Add ios/macos framework build. 9f723f891d3 fix: run do_gca also in bootstrap nodes 496cc703556 chore: Support arm64 iphone simulator. aa0e2a8e928 chore: Add support for more iOS architectures. 13ad8e81cbf chore: Add binary deploy workflows. c8344726378 refactor: Move tox_log_level out into its own file. 8799bea76c3 cleanup: Mark events/dispatch headers as experimental. d4164edb548 refactor: Remove tox_types.h; use `struct` tags instead. d408c982090 refactor: Move `Tox_Options` to `tox_options.h`. 5ab42d41209 chore: Move most cirrus jobs to circleci. 463eeae1144 cleanup: Avoid clashing with global define `DEBUG`. 92cc1e91747 refactor: Make Tox_Options own the passed proxy host and savedata. f276b397226 test: Add some more asserts for I/O and alloc to succeed. edb4dfc4869 fix: Don't crash on malloc failures in bin_unpack. be457d5d0b2 cleanup: Use tox memory for bin_unpack and net_strerror. git-subtree-dir: external/toxcore/c-toxcore git-subtree-split: 81b1e4f6348124784088591c4fe9ab41e273031d
2025-03-12 19:16:50 +01:00
parent 3b6bb15e86
commit 3105cc20ef
130 changed files with 3604 additions and 1776 deletions
--- a/other/deploy/android.sh
+++ b/other/deploy/android.sh
@ -0,0 +1,102 @@
+#!/bin/bash
+
+set -eu
+
+if [ -n "${CI-}" ]; then
+  sudo apt-get install -y --no-install-recommends ninja-build yasm
+fi
+
+# Set up environment
+NDK=$ANDROID_NDK_HOME
+
+ABI=${1:-"armeabi-v7a"}
+
+case $ABI in
+  armeabi-v7a)
+    TARGET=armv7a-linux-androideabi
+    NDK_API=21
+    ANDROID_VPX_ABI=armv7-android-gcc
+    ;;
+  arm64-v8a)
+    TARGET=aarch64-linux-android
+    NDK_API=21
+    ANDROID_VPX_ABI=arm64-android-gcc
+    ;;
+  x86)
+    TARGET=i686-linux-android
+    NDK_API=21
+    ANDROID_VPX_ABI=x86-android-gcc
+    ;;
+  x86_64)
+    TARGET=x86_64-linux-android
+    NDK_API=21
+    ANDROID_VPX_ABI=x86_64-android-gcc
+    ;;
+  *)
+    exit 1
+    ;;
+esac
+
+PREFIX="$PWD/deps-prefix-android-$ABI"
+
+TOOLCHAIN="$NDK/toolchains/llvm/prebuilt/linux-x86_64"
+SYSROOT="$TOOLCHAIN/sysroot"
+
+export CC="$TOOLCHAIN/bin/$TARGET$NDK_API-clang"
+export CXX="$TOOLCHAIN/bin/$TARGET$NDK_API-clang++"
+export LDFLAGS=-static-libstdc++
+export PKG_CONFIG_PATH="$PREFIX/lib/pkgconfig"
+
+# Build libsodium
+if [ ! -f "$PREFIX/lib/libsodium.a" ]; then
+  tar zxf <(wget -O- https://github.com/jedisct1/libsodium/releases/download/1.0.20-RELEASE/libsodium-1.0.20.tar.gz)
+  pushd libsodium-1.0.20
+  ./configure --prefix="$PREFIX" --host="$TARGET" --with-sysroot="$SYSROOT" --disable-shared --disable-pie
+  make -j"$(nproc)" install
+  popd
+  rm -rf libsodium-1.0.20
+fi
+
+# Build opus
+if [ ! -f "$PREFIX/lib/libopus.a" ]; then
+  tar zxf <(wget -O- https://github.com/xiph/opus/releases/download/v1.5.2/opus-1.5.2.tar.gz)
+  pushd opus-1.5.2
+  CFLAGS="-fPIC" ./configure --prefix="$PREFIX" --host="$TARGET" --with-sysroot="$SYSROOT" --disable-shared
+  make "-j$(nproc)"
+  make install
+  popd
+  rm -rf opus-1.5.2
+fi
+
+# Build libvpx
+if [ ! -f "$PREFIX/lib/libvpx.a" ]; then
+  tar zxf <(wget -O- https://github.com/webmproject/libvpx/archive/refs/tags/v1.15.0.tar.gz)
+  pushd libvpx-1.15.0
+  ./configure --prefix="$PREFIX" --libc="$SYSROOT" --target="$ANDROID_VPX_ABI" --disable-examples --disable-unit-tests --enable-pic ||
+    (cat config.log && exit 1)
+  sed -i -e "s!^AS=as!AS=$CC -c!" ./*.mk
+  sed -i -e "s!^STRIP=strip!STRIP=$TOOLCHAIN/bin/llvm-strip!" ./*.mk
+  make "-j$(nproc)"
+  make install
+  popd
+  rm -rf libvpx-1.15.0
+fi
+
+# Build c-toxcore
+rm -rf _build
+cmake -B _build -G Ninja \
+  -DANDROID_ABI="$ABI" \
+  -DCMAKE_TOOLCHAIN_FILE="$NDK/build/cmake/android.toolchain.cmake" \
+  -DCMAKE_INSTALL_PREFIX="$PWD/toxcore-android-$ABI" \
+  -DCMAKE_PREFIX_PATH="$PREFIX" \
+  -DENABLE_STATIC=OFF \
+  -DENABLE_SHARED=ON \
+  -DMUST_BUILD_TOXAV=ON \
+  -DDHT_BOOTSTRAP=OFF \
+  -DBOOTSTRAP_DAEMON=OFF \
+  -DUNITTEST=OFF \
+  -DSTRICT_ABI=ON \
+  -DMIN_LOGGER_LEVEL=TRACE \
+  -DEXPERIMENTAL_API=ON
+cmake --build _build
+cmake --install _build
--- a/other/deploy/apple/.gitignore
+++ b/other/deploy/apple/.gitignore
@ -0,0 +1,5 @@
+/Tox.xcframework
+/toxcore-ios*
+/toxcore-iphonesimulator*
+/toxcore-macos*
+/smoke-test.c
--- a/other/deploy/apple/Info.plist
+++ b/other/deploy/apple/Info.plist
@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>English</string>
+	<key>CFBundleExecutable</key>
+	<string>Tox</string>
+	<key>CFBundleName</key>
+	<string>Tox</string>
+	<key>CFBundleIconFile</key>
+	<string></string>
+	<key>CFBundleIdentifier</key>
+	<string>chat.tox.toxcore</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundlePackageType</key>
+	<string>FMWK</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>0.2.20</string>
+	<key>CFBundleShortVersionString</key>
+	<string>0.2.20</string>
+	<key>CFBundleGetInfoString</key>
+	<string>Tox Framework</string>
+</dict>
+</plist>
--- a/other/deploy/apple/LICENSE
+++ b/other/deploy/apple/LICENSE
@ -0,0 +1 @@
+../../../LICENSE
--- a/other/deploy/apple/download-nightly.sh
+++ b/other/deploy/apple/download-nightly.sh
@ -0,0 +1,29 @@
+#!/bin/bash
+# Download the nightly builds of Tox for iOS, iPhone simulator, and macOS.
+
+set -eux -o pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+cd "$SCRIPT_DIR"
+
+for arch in arm64 armv7 armv7s; do
+  if [ ! -d "toxcore-ios-$arch" ]; then
+    tar -zxf \
+      <(curl -L "https://github.com/TokTok/c-toxcore/releases/download/nightly/toxcore-nightly-ios-$arch.tar.gz")
+  fi
+done
+
+for arch in arm64 x86_64; do
+  if [ ! -d "toxcore-iphonesimulator-$arch" ]; then
+    tar -zxf \
+      <(curl -L "https://github.com/TokTok/c-toxcore/releases/download/nightly/toxcore-nightly-iphonesimulator-$arch.tar.gz")
+  fi
+done
+
+for arch in arm64 x86_64; do
+  if [ ! -d "toxcore-macos-$arch" ]; then
+    tar -zxf \
+      <(curl -L "https://github.com/TokTok/c-toxcore/releases/download/nightly/toxcore-nightly-macos-$arch.tar.gz")
+  fi
+done
--- a/other/deploy/apple/make-framework.sh
+++ b/other/deploy/apple/make-framework.sh
@ -0,0 +1,71 @@
+#!/bin/bash
+# Make a Tox.xcframework for iOS, iPhone simulator, and macOS from the nightly builds.
+#
+# Run download-nightly.sh before running this script if you run it locally.
+
+set -eux -o pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+cd "$SCRIPT_DIR"
+
+# Make a Tox.framework for iOS.
+rm -rf toxcore-ios/Tox.framework
+mkdir -p toxcore-ios/Tox.framework
+cp Info.plist toxcore-ios/Tox.framework
+cp -r toxcore-ios-arm64/include/tox toxcore-ios/Tox.framework/Headers
+lipo -create -output toxcore-ios/Tox.framework/Tox \
+  toxcore-ios-arm64/lib/libtoxcore.dylib \
+  toxcore-ios-armv7/lib/libtoxcore.dylib \
+  toxcore-ios-armv7s/lib/libtoxcore.dylib
+install_name_tool -id @rpath/Tox.framework/Tox toxcore-ios/Tox.framework/Tox
+
+# Make a Tox.framework for iPhone simulator.
+rm -rf toxcore-iphonesimulator/Tox.framework
+mkdir -p toxcore-iphonesimulator/Tox.framework
+cp Info.plist toxcore-iphonesimulator/Tox.framework
+cp -r toxcore-iphonesimulator-arm64/include/tox toxcore-iphonesimulator/Tox.framework/Headers
+lipo -create -output toxcore-iphonesimulator/Tox.framework/Tox \
+  toxcore-iphonesimulator-arm64/lib/libtoxcore.dylib \
+  toxcore-iphonesimulator-x86_64/lib/libtoxcore.dylib
+install_name_tool -id @rpath/Tox.framework/Tox toxcore-iphonesimulator/Tox.framework/Tox
+
+# Make a Tox.framework for macOS.
+rm -rf toxcore-macos/Tox.framework
+mkdir -p toxcore-macos/Tox.framework
+cp Info.plist toxcore-macos/Tox.framework
+cp -r toxcore-macos-arm64/include/tox toxcore-macos/Tox.framework/Headers
+lipo -create -output toxcore-macos/Tox.framework/Tox \
+  toxcore-macos-arm64/lib/libtoxcore.dylib \
+  toxcore-macos-x86_64/lib/libtoxcore.dylib
+install_name_tool -id @rpath/Tox.framework/Tox toxcore-macos/Tox.framework/Tox
+
+# Make a Tox.xcframework for iOS, iPhone simulator, and macOS.
+rm -rf Tox.xcframework
+xcodebuild -create-xcframework -output Tox.xcframework \
+  -framework toxcore-ios/Tox.framework \
+  -framework toxcore-iphonesimulator/Tox.framework \
+  -framework toxcore-macos/Tox.framework
+
+# Test the Tox.xcframework.
+cat >smoke-test.c <<'EOF'
+#include <stdio.h>
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdocumentation-deprecated-sync"
+#include <tox/tox.h>
+#pragma GCC diagnostic pop
+
+int main(void) {
+  Tox *tox = tox_new(NULL, NULL);
+  if (tox == NULL) {
+    fprintf(stderr, "tox_new failed\n");
+    return 1;
+  }
+  tox_kill(tox);
+  return 0;
+}
+EOF
+pod lib lint toxcore.podspec
+
+rm smoke-test.c
--- a/other/deploy/apple/toxcore.podspec
+++ b/other/deploy/apple/toxcore.podspec
@ -0,0 +1,24 @@
+Pod::Spec.new do |s|
+  s.name             = "toxcore"
+  s.version          = "0.2.20"
+  s.summary          = "Cocoapods wrapper for toxcore"
+  s.homepage         = "https://github.com/TokTok/c-toxcore"
+  s.license          = 'GPLv3'
+  s.author           = { "Iphigenia Df" => "iphydf@gmail.com" }
+  s.source           = {
+      :git => "https://github.com/TokTok/c-toxcore.git",
+      :tag => s.version.to_s,
+      :submodules => true
+  }
+
+  s.requires_arc = false
+
+  s.ios.deployment_target = '12.0'
+  s.osx.deployment_target = '10.15'
+
+  s.vendored_frameworks = 'Tox.xcframework'
+  s.xcconfig = { 'FRAMEWORK_SEARCH_PATHS' => '"${PODS_ROOT}"' }
+  s.test_spec 'Tests' do |test_spec|
+    test_spec.source_files = 'smoke-test.c'
+  end
+end
--- a/other/deploy/deps.sh
+++ b/other/deploy/deps.sh
@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+set -eux -o pipefail
+
+SYSTEM="$1"
+ARCH="$2"
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+
+DEP_PREFIX="$PWD/deps-prefix-$SYSTEM-$ARCH"
+
+if [ -d "$DEP_PREFIX" ]; then
+  exit 0
+fi
+
+if [ -d ../dockerfiles ]; then
+  DOCKERFILES="$(realpath ../dockerfiles)"
+else
+  git clone --depth=1 https://github.com/TokTok/dockerfiles "$SCRIPT_DIR/dockerfiles"
+  DOCKERFILES="$SCRIPT_DIR/dockerfiles"
+fi
+
+for dep in sodium opus vpx; do
+  mkdir -p "external/$dep"
+  pushd "external/$dep"
+  SCRIPT="$DOCKERFILES/qtox/build_$dep.sh"
+  "$SCRIPT" --arch "$SYSTEM-$ARCH" --libtype "static" --buildtype "release" --prefix "$DEP_PREFIX" --macos "10.15"
+  popd
+  rm -rf "external/$dep"
+done
--- a/other/deploy/ios.sh
+++ b/other/deploy/ios.sh
@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+
+set -eux -o pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+
+TARGET="$1"
+
+if [ -n "${CI-}" ]; then
+  brew install bash coreutils ninja yasm
+fi
+
+SYSTEM="${TARGET%%-*}"
+ARCH="${TARGET#*-}"
+
+"$SCRIPT_DIR/deps.sh" "$SYSTEM" "$ARCH"
+
+export PKG_CONFIG_PATH="$PWD/deps-prefix-$SYSTEM-$ARCH/lib/pkgconfig"
+
+if [ "$SYSTEM" = "ios" ]; then
+  XC_SDK="iphoneos"
+  TARGET_IPHONE_SIMULATOR=OFF
+  IOS_FLAGS="-miphoneos-version-min=10.0 -arch $ARCH"
+elif [ "$SYSTEM" = "iphonesimulator" ]; then
+  XC_SDK="iphonesimulator"
+  TARGET_IPHONE_SIMULATOR=ON
+  IOS_FLAGS="-arch $ARCH"
+else
+  echo "Unexpected system $SYSTEM"
+  exit 1
+fi
+
+BUILD_DIR="_build-$SYSTEM-$ARCH"
+
+# Build for iOS 10
+cmake \
+  -B "$BUILD_DIR" \
+  -G Ninja \
+  -DCMAKE_INSTALL_PREFIX="$PWD/toxcore-$SYSTEM-$ARCH" \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DENABLE_STATIC=OFF \
+  -DENABLE_SHARED=ON \
+  -DMUST_BUILD_TOXAV=ON \
+  -DDHT_BOOTSTRAP=OFF \
+  -DBOOTSTRAP_DAEMON=OFF \
+  -DUNITTEST=OFF \
+  -DSTRICT_ABI=ON \
+  -DMIN_LOGGER_LEVEL=TRACE \
+  -DEXPERIMENTAL_API=ON \
+  -DCMAKE_C_FLAGS="$IOS_FLAGS" \
+  -DCMAKE_CXX_FLAGS="$IOS_FLAGS" \
+  -DCMAKE_EXE_LINKER_FLAGS="$IOS_FLAGS" \
+  -DCMAKE_SHARED_LINKER_FLAGS="$IOS_FLAGS" \
+  -DCMAKE_OSX_SYSROOT="$(xcrun --sdk "$XC_SDK" --show-sdk-path)" \
+  -DCMAKE_OSX_ARCHITECTURES="$ARCH"
+
+cmake --build "$BUILD_DIR"
+cmake --install "$BUILD_DIR"
--- a/other/deploy/linux.sh
+++ b/other/deploy/linux.sh
@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+set -eux -o pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+
+ARCH="$1"
+"$SCRIPT_DIR/deps.sh" linux "$ARCH"
+
+export PKG_CONFIG_PATH="$PWD/deps-prefix-linux-$ARCH/lib/pkgconfig"
+
+# Build
+cmake \
+  -B _build \
+  -G Ninja \
+  -DCMAKE_INSTALL_PREFIX="$PWD/toxcore-linux-$ARCH" \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DENABLE_STATIC=OFF \
+  -DENABLE_SHARED=ON \
+  -DMUST_BUILD_TOXAV=ON \
+  -DDHT_BOOTSTRAP=OFF \
+  -DBOOTSTRAP_DAEMON=OFF \
+  -DUNITTEST=OFF \
+  -DSTRICT_ABI=ON \
+  -DMIN_LOGGER_LEVEL=TRACE \
+  -DEXPERIMENTAL_API=ON
+
+cmake --build _build
+cmake --install _build
--- a/other/deploy/macos.sh
+++ b/other/deploy/macos.sh
@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+
+set -eux -o pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+
+ARCH="$1"
+
+if [ -n "${CI-}" ]; then
+  brew install bash coreutils ninja yasm
+fi
+
+"$SCRIPT_DIR/deps.sh" macos "$ARCH"
+
+export PKG_CONFIG_PATH="$PWD/deps-prefix-macos-$ARCH/lib/pkgconfig"
+
+BUILD_DIR="_build-macos-$ARCH"
+
+# Build for macOS
+cmake \
+  -B "$BUILD_DIR" \
+  -G Ninja \
+  -DCMAKE_INSTALL_PREFIX="$PWD/toxcore-macos-$ARCH" \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DENABLE_STATIC=OFF \
+  -DENABLE_SHARED=ON \
+  -DMUST_BUILD_TOXAV=ON \
+  -DDHT_BOOTSTRAP=OFF \
+  -DBOOTSTRAP_DAEMON=OFF \
+  -DUNITTEST=OFF \
+  -DSTRICT_ABI=ON \
+  -DMIN_LOGGER_LEVEL=TRACE \
+  -DEXPERIMENTAL_API=ON \
+  -DCMAKE_OSX_DEPLOYMENT_TARGET=10.15
+
+cmake --build "$BUILD_DIR"
+cmake --install "$BUILD_DIR"
--- a/other/deploy/single-file/.gitignore
+++ b/other/deploy/single-file/.gitignore
@ -0,0 +1 @@
+!/Makefile
--- a/other/deploy/single-file/Makefile
+++ b/other/deploy/single-file/Makefile
@ -0,0 +1,26 @@
+TARGETS = libtoxcore.a libtoxcore-minimal.a
+
+all: $(TARGETS)
+
+libtoxcore.o: $(wildcard toxcore-*av.c)
+	$(CC) -c -o $@ $< \
+		-O2 \
+		-Wno-discarded-qualifiers \
+		-fPIC \
+		-Wl,-Bstatic \
+		$(shell pkg-config --cflags --libs libsodium) \
+		-Wl,-Bdynamic \
+		$(shell pkg-config --cflags --libs opus vpx) \
+		-pthread
+
+libtoxcore-minimal.o: $(wildcard toxcore-*core.c)
+	$(CC) -c -o $@ $< \
+		-O2 \
+		-Wno-discarded-qualifiers \
+		-fPIC \
+		-Wl,-Bstatic \
+		$(shell pkg-config --cflags --libs libsodium) \
+		-pthread
+
+%.a: %.o
+	$(AR) rcs $@ $^
--- a/other/deploy/single-file/make_single_file
+++ b/other/deploy/single-file/make_single_file
@ -0,0 +1,60 @@
+#!/usr/bin/env perl
+#
+# This script can be used to create a single .c file with all of toxcore in it
+# as well as your code or test file. It does not depend on any header files
+# anymore, as those are emitted directly into the .c file.
+#
+# Example:
+#
+#   other/deploy/single-file/make_single_file auto_tests/toxav_basic_test.c auto_tests/auto_test_support.c testing/misc_tools.c | \
+#     tcc -o toxav_basic_test - $(pkg-config --cflags --libs libsodium opus vpx)
+#
+#   other/deploy/single-file/make_single_file -core auto_tests/send_message_test.c auto_tests/auto_test_support.c testing/misc_tools.c | \
+#     tcc -o send_message_test - $(pkg-config --cflags --libs libsodium)
+
+use strict;
+use warnings;
+
+use Cwd 'abs_path';
+
+sub relative_to {
+   my ($rel, $fn) = @_;
+   my @path = split "/", $rel;
+   pop @path;
+   abs_path(join "/", @path, $fn)
+}
+
+my %seen;
+sub emit {
+   my ($fn) = @_;
+   return if $seen{$fn};
+   $seen{$fn} = 1;
+
+   open my $fh, "<", $fn or die "$fn: $!";
+   my $line = 1;
+   print "#line $line \"$fn\"\n";
+   while (<$fh>) {
+      if (/^#include "([^"]*)"/) {
+         emit(relative_to($fn, $1), $1);
+         ++$line;
+         print "#line $line \"$fn\"\n";
+      } else {
+         print;
+         ++$line;
+      }
+   }
+}
+
+my @core = (<toxcore/*.c>, <toxcore/*/*.c>, <toxencryptsave/*.c>, <third_party/cmp/*.c>);
+if (@ARGV and $ARGV[0] eq "-core") {
+   shift @ARGV;
+   emit(abs_path $_) for @core;
+} else {
+   if (@ARGV and $ARGV[0] eq "-av") {
+      # Ignore -av, it's the default.
+      shift @ARGV;
+   }
+   emit(abs_path $_) for (<toxav/*.c>, @core);
+}
+
+emit(abs_path $_) for @ARGV;