feat: 动态链接到 opus 和 alsa 基础库，完成音频录制播放和编解码

2025-12-31 22:53:33 +08:00
parent c521e274e9
commit fba40393c2
11 changed files with 431 additions and 46 deletions
@@ -2,6 +2,121 @@
 # It is not intended for manual editing.
 version = 4

+[[package]]
+name = "alsa"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "812947049edcd670a82cd5c73c3661d2e58468577ba8489de58e1a73c04cbd5d"
+dependencies = [
+ "alsa-sys",
+ "bitflags",
+ "cfg-if",
+ "libc",
+]
+
+[[package]]
+name = "alsa-sys"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ad7569085a265dd3f607ebecce7458eaab2132a84393534c95b18dcbc3f31e04"
+dependencies = [
+ "libc",
+ "pkg-config",
+]
+
+[[package]]
+name = "anyhow"
+version = "1.0.100"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a23eb6b1614318a8071c9b2521f36b424b2c83db5eb3a0fead4a6c0809af6e61"
+
+[[package]]
+name = "audiopus_sys"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62314a1546a2064e033665d658e88c620a62904be945f8147e6b16c3db9f8651"
+dependencies = [
+ "cmake",
+ "log",
+ "pkg-config",
+]
+
+[[package]]
+name = "bitflags"
+version = "2.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "812e12b5285cc515a9c72a5c1d3b6d46a19dac5acfef5265968c166106e31dd3"
+
+[[package]]
+name = "cc"
+version = "1.2.51"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a0aeaff4ff1a90589618835a598e545176939b97874f7abc7851caa0618f203"
+dependencies = [
+ "find-msvc-tools",
+ "shlex",
+]
+
+[[package]]
+name = "cfg-if"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
+
+[[package]]
+name = "cmake"
+version = "0.1.57"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "75443c44cd6b379beb8c5b45d85d0773baf31cce901fe7bb252f4eff3008ef7d"
+dependencies = [
+ "cc",
+]
+
+[[package]]
+name = "find-msvc-tools"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "645cbb3a84e60b7531617d5ae4e57f7e27308f6445f5abf653209ea76dec8dff"
+
 [[package]]
 name = "hello"
 version = "0.1.0"
+dependencies = [
+ "alsa",
+ "anyhow",
+ "opus",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.178"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37c93d8daa9d8a012fd8ab92f088405fb202ea0b6ab73ee2482ae66af4f42091"
+
+[[package]]
+name = "log"
+version = "0.4.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897"
+
+[[package]]
+name = "opus"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6526409b274a7e98e55ff59d96aafd38e6cd34d46b7dbbc32ce126dffcd75e8e"
+dependencies = [
+ "audiopus_sys",
+ "libc",
+]
+
+[[package]]
+name = "pkg-config"
+version = "0.3.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7edddbd0b52d732b21ad9a5fab5c704c14cd949e5e9a1ec5929a24fded1b904c"
+
+[[package]]
+name = "shlex"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
@@ -4,3 +4,6 @@ version = "0.1.0"
 edition = "2024"

 [dependencies]
+alsa = "0.11"
+opus = "0.3"
+anyhow = "1.0"
@@ -0,0 +1,31 @@
+use opus::{Encoder, Decoder, Application, Bitrate, Channels};
+use anyhow::{Result, Context};
+use crate::config::AudioConfig;
+
+pub struct OpusCodec {
+    encoder: Encoder,
+    decoder: Decoder,
+}
+
+impl OpusCodec {
+    pub fn new(config: &AudioConfig) -> Result<Self> {
+        let channels = if config.channels == 1 { Channels::Mono } else { Channels::Stereo };
+        let mut encoder = Encoder::new(config.sample_rate, channels, Application::Voip)
+            .context("Failed to create Opus encoder")?;
+        encoder.set_bitrate(Bitrate::Bits(config.bitrate))?;
+
+        let decoder = Decoder::new(config.sample_rate, channels)
+            .context("Failed to create Opus decoder")?;
+
+        Ok(Self { encoder, decoder })
+    }
+
+    pub fn encode(&mut self, pcm: &[i16], out: &mut [u8]) -> Result<usize> {
+        self.encoder.encode(pcm, out).context("Opus encoding failed")
+    }
+
+    pub fn decode(&mut self, opus: &[u8], out: &mut [i16]) -> Result<usize> {
+        self.decoder.decode(opus, out, false).context("Opus decoding failed")
+    }
+}
+
@@ -0,0 +1,8 @@
+pub mod recorder;
+pub mod player;
+pub mod codec;
+
+pub use recorder::AudioRecorder;
+pub use player::AudioPlayer;
+pub use codec::OpusCodec;
+
@@ -0,0 +1,54 @@
+use crate::config::AudioConfig;
+use alsa::pcm::{Access, Format, HwParams, PCM};
+use alsa::Direction;
+use anyhow::{Context, Result};
+
+pub struct AudioPlayer {
+    pcm: PCM,
+}
+
+impl AudioPlayer {
+    pub fn new(config: &AudioConfig) -> Result<Self> {
+        let pcm = PCM::new(&config.playback_device, Direction::Playback, false)
+            .context("Failed to open playback PCM device")?;
+
+        setup_pcm(&pcm, config.sample_rate, config.channels)?;
+        Ok(Self { pcm })
+    }
+
+    pub fn write(&self, buffer: &[i16]) -> Result<usize> {
+        let res = self.pcm.io_i16()?.writei(buffer);
+
+        match res {
+            Ok(written) => Ok(written),
+            Err(e) => {
+                // Buffer Underrun，即播放缓冲区的数据被耗尽，导致音频流中断
+                if e.errno() == 32 {
+                    // 恢复音频流状态
+                    self.pcm.prepare()?;
+                    // 重新获取 IO 对象并尝试写入数据
+                    self.pcm
+                        .io_i16()?
+                        .writei(buffer)
+                        .context("Failed to write to playback device after recovery")
+                } else {
+                    Err(e).context("Failed to write to playback device")
+                }
+            }
+        }
+    }
+}
+
+fn setup_pcm(pcm: &PCM, sample_rate: u32, channels: u16) -> Result<()> {
+    let hwp = HwParams::any(pcm).context("Failed to get HwParams")?;
+    hwp.set_access(Access::RWInterleaved)?;
+    hwp.set_format(Format::s16())?;
+    hwp.set_rate(sample_rate, alsa::ValueOr::Nearest)?;
+    hwp.set_channels(channels as u32)?;
+    pcm.hw_params(&hwp).context("Failed to set HwParams")?;
+
+    let swp = pcm.sw_params_current()?;
+    pcm.sw_params(&swp)?;
+    pcm.prepare()?;
+    Ok(())
+}
@@ -0,0 +1,37 @@
+use alsa::pcm::{PCM, HwParams, Format, Access};
+use alsa::Direction;
+use anyhow::{Result, Context};
+use crate::config::AudioConfig;
+
+pub struct AudioRecorder {
+    pcm: PCM,
+}
+
+impl AudioRecorder {
+    pub fn new(config: &AudioConfig) -> Result<Self> {
+        let pcm = PCM::new(&config.capture_device, Direction::Capture, false)
+            .context("Failed to open capture PCM device")?;
+        
+        setup_pcm(&pcm, config.sample_rate, config.channels)?;
+        Ok(Self { pcm })
+    }
+
+    pub fn read(&self, buffer: &mut [i16]) -> Result<usize> {
+        self.pcm.io_i16()?.readi(buffer).context("Failed to read from capture device")
+    }
+}
+
+fn setup_pcm(pcm: &PCM, sample_rate: u32, channels: u16) -> Result<()> {
+    let hwp = HwParams::any(pcm).context("Failed to get HwParams")?;
+    hwp.set_access(Access::RWInterleaved)?;
+    hwp.set_format(Format::s16())?;
+    hwp.set_rate(sample_rate, alsa::ValueOr::Nearest)?;
+    hwp.set_channels(channels as u32)?;
+    pcm.hw_params(&hwp).context("Failed to set HwParams")?;
+    
+    let swp = pcm.sw_params_current()?;
+    pcm.sw_params(&swp)?;
+    pcm.prepare()?;
+    Ok(())
+}
+
@@ -0,0 +1,25 @@
+pub struct AudioConfig {
+    pub capture_device: String,
+    pub playback_device: String,
+    pub sample_rate: u32,
+    pub channels: u16,
+    pub frame_size: usize,
+    pub bitrate: i32,
+}
+
+impl Default for AudioConfig {
+    fn default() -> Self {
+        Self {
+            // 根据 apps/runtime/squashfs-root/etc/asound.conf 分析：
+            // 录音设备对应 pcm.Capture -> hw:0,3 (S32_LE, 48000Hz)
+            // 播放设备对应 pcm.dmixer -> hw:0,2 (S16_LE, 48000Hz)
+            // 使用 "default" 或 "plug" 设备可以由 ALSA 自动处理采样率和格式转换
+            capture_device: "plug:Capture".to_string(),
+            playback_device: "default".to_string(),
+            sample_rate: 16000, // Opus 常用 16k，ALSA plug 会自动从 48k 转换
+            channels: 1,
+            frame_size: 320, // 20ms at 16kHz
+            bitrate: 16000,
+        }
+    }
+}
@@ -1,9 +1,63 @@
-fn main() {
-    println!("Hello from OpenWrt (ARMhf)!");
-    println!("System information (via /proc/version):");
-    if let Ok(version) = std::fs::read_to_string("/proc/version") {
-        println!("{}", version);
-    } else {
-        println!("Could not read /proc/version (running in simulation?)");
+mod audio;
+mod config;
+
+use crate::audio::{AudioPlayer, AudioRecorder, OpusCodec};
+use crate::config::AudioConfig;
+use anyhow::Result;
+use std::collections::VecDeque;
+use std::time::{Duration, Instant};
+
+fn main() -> Result<()> {
+    let config = AudioConfig::default();
+    println!("Starting Audio Modular Demo with 1s delay");
+    println!(
+        "Config: capture={}, playback={}, rate={}, channels={}, frame_size={}",
+        config.capture_device,
+        config.playback_device,
+        config.sample_rate,
+        config.channels,
+        config.frame_size
+    );
+
+    let recorder = AudioRecorder::new(&config)?;
+    let player = AudioPlayer::new(&config)?;
+    let mut codec = OpusCodec::new(&config)?;
+
+    // 使用队列存储编码后的 Opus 数据块及录制时间
+    let mut delay_queue: VecDeque<(Instant, Vec<u8>)> = VecDeque::new();
+    let delay_duration = Duration::from_secs(1);
+
+    let mut pcm_in = vec![0i16; config.frame_size * config.channels as usize];
+    let mut opus_buf = vec![0u8; 1024];
+
+    println!("Recording... Delaying playback by 1s. Press Ctrl+C to stop.");
+
+    loop {
+        // 1. 录制原始 PCM
+        let read = recorder.read(&mut pcm_in)?;
+        if read == config.frame_size {
+            // 2. 编码并存入队列
+            let opus_len = codec.encode(&pcm_in, &mut opus_buf)?;
+            let opus_data = opus_buf[..opus_len].to_vec();
+            delay_queue.push_back((Instant::now(), opus_data));
+        }
+
+        // 3. 处理延迟播放：检查队列头部数据是否已等待超过 1s
+        while let Some((timestamp, _)) = delay_queue.front() {
+            if timestamp.elapsed() >= delay_duration {
+                let (_, opus_data) = delay_queue.pop_front().unwrap();
+
+                let mut pcm_out = vec![0i16; config.frame_size * config.channels as usize];
+                let decoded_len = codec.decode(&opus_data, &mut pcm_out)?;
+
+                if decoded_len == config.frame_size {
+                    // 4. 播放还原后的 PCM
+                    player.write(&pcm_out)?;
+                }
+            } else {
+                // 头部数据还未到 1s，由于队列是按时间排序的，后面的肯定也没到
+                break;
+            }
+        }
    }
 }
@@ -31,17 +31,99 @@ RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
 ENV PATH="/root/.cargo/bin:${PATH}"
 RUN rustup target add armv7-unknown-linux-gnueabihf

-# 配置 Cargo
-ENV CARGO_TARGET_ARMV7_UNKNOWN_LINUX_GNUEABIHF_LINKER=arm-linux-gnueabihf-gcc
-ENV CARGO_TARGET_ARMV7_UNKNOWN_LINUX_GNUEABIHF_RUSTFLAGS="-C link-arg=-Wl,-dynamic-linker,/lib/ld-linux-armhf.so.3"
-
-# 设置 CC
-ENV CC_armv7_unknown_linux_gnueabihf=arm-linux-gnueabihf-gcc
-
 WORKDIR /app

 COPY run.sh /usr/local/bin/run
 COPY runtime.sh /usr/local/bin/runtime
 RUN chmod +x /usr/local/bin/run /usr/local/bin/runtime

+# 解压 root.squashfs
+COPY root.squashfs /app/root.squashfs
+RUN mkdir -p /opt/sysroot \
+    && unsquashfs -d /opt/sysroot -f /app/root.squashfs \
+    && rm -rf /app/root.squashfs
+
+# 创建专门针对 armhf 的源文件
+# 注意：ubuntu:20.04 默认源里没有 armhf，必须添加 ubuntu-ports 源
+RUN echo "deb [arch=armhf] http://mirrors.aliyun.com/ubuntu-ports/ focal main restricted universe multiverse" > /etc/apt/sources.list.d/armhf.list && \
+    echo "deb [arch=armhf] http://mirrors.aliyun.com/ubuntu-ports/ focal-updates main restricted universe multiverse" >> /etc/apt/sources.list.d/armhf.list && \
+    # 限制原有的源只针对 amd64，防止冲突
+    sed -i 's/deb http/deb [arch=amd64] http/g' /etc/apt/sources.list
+
+# 安装 armhf 架构的开发库
+RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
+    --mount=type=cache,target=/var/lib/apt,sharing=locked \
+    dpkg --add-architecture armhf && \
+    apt-get update && apt-get install -y \
+    crossbuild-essential-armhf \
+    libasound2-dev:armhf \
+    libopus-dev:armhf \
+    libssl-dev:armhf
+
+# --------------------------------------------------------------------------------
+# 构建混合 Sysroot
+# 目标：结合 OpenWrt 的运行时库 (root.squashfs) 和 Toolchain/Ubuntu 的开发文件
+# --------------------------------------------------------------------------------
+
+# 修复 OpenWrt sysroot：自动为所有共享库创建 .so 符号链接
+# OpenWrt 只有 libfoo.so.1，编译链接需要 libfoo.so
+RUN find /opt/sysroot/lib /opt/sysroot/usr/lib -name "lib*.so.*" | while read src; do \
+        # 获取库名 (例如 libopus.so.0.8.0 -> libopus.so)
+        link_name=$(echo "$src" | sed 's/\.so\..*$/.so/'); \
+        if [ ! -e "$link_name" ]; then \
+            ln -s "$(basename "$src")" "$link_name"; \
+        fi \
+    done
+
+# 注入 Toolchain 的 C 运行时启动文件 (Scrt1.o, crti.o 等)
+RUN cp -r /opt/toolchain/arm-linux-gnueabihf/libc/usr/lib/*crt*.o /opt/sysroot/usr/lib/ 2>/dev/null || \
+    cp -r /opt/toolchain/arm-linux-gnueabihf/libc/lib/*crt*.o /opt/sysroot/usr/lib/ 2>/dev/null || true
+
+# 特殊处理 glibc 的 linker script
+# OpenWrt rootfs 中没有开发用的 libc.so (linker script) 和 libc_nonshared.a
+# 我们需要从 toolchain 中复制 libc_nonshared.a，并手动创建 libc.so 脚本
+# 这样 linker 才能正确处理 libc.so.6 和 ld-linux-armhf.so.3 的依赖关系 (解决 __tls_get_addr 错误)
+RUN cp /opt/toolchain/arm-linux-gnueabihf/libc/usr/lib/libc_nonshared.a /opt/sysroot/usr/lib/ && \
+    # 删除之前步骤可能自动生成的软链接
+    rm -f /opt/sysroot/usr/lib/libc.so && \
+    # 创建 linker script
+    echo 'OUTPUT_FORMAT(elf32-littlearm)' > /opt/sysroot/usr/lib/libc.so && \
+    echo 'GROUP ( /lib/libc.so.6 /usr/lib/libc_nonshared.a AS_NEEDED ( /lib/ld-linux-armhf.so.3 ) )' >> /opt/sysroot/usr/lib/libc.so && \
+    # 同理处理 libpthread.so (如果存在 libpthread.so.0)
+    if [ -f /opt/sysroot/lib/libpthread.so.0 ]; then \
+        cp /opt/toolchain/arm-linux-gnueabihf/libc/usr/lib/libpthread_nonshared.a /opt/sysroot/usr/lib/ 2>/dev/null || true; \
+        rm -f /opt/sysroot/usr/lib/libpthread.so; \
+        echo 'OUTPUT_FORMAT(elf32-littlearm)' > /opt/sysroot/usr/lib/libpthread.so; \
+        echo 'GROUP ( /lib/libpthread.so.0 /usr/lib/libpthread_nonshared.a )' >> /opt/sysroot/usr/lib/libpthread.so; \
+    fi
+
+# 注入 Ubuntu 的开发头文件和 pkg-config 定义 (用于 alsa, opus 等)
+# 我们只取头文件和 .pc 文件，不取库文件，确保链接的是 OpenWrt 的库
+RUN mkdir -p /opt/sysroot/usr/include /opt/sysroot/usr/lib/pkgconfig && \
+    cp -r /usr/include/alsa /opt/sysroot/usr/include/ 2>/dev/null || true && \
+    cp -r /usr/include/opus /opt/sysroot/usr/include/ 2>/dev/null || true && \
+    cp -r /usr/include/arm-linux-gnueabihf/* /opt/sysroot/usr/include/ 2>/dev/null || true && \
+    cp -r /usr/lib/arm-linux-gnueabihf/pkgconfig/* /opt/sysroot/usr/lib/pkgconfig/ 2>/dev/null || true
+
+# 优化 Rust 链接参数
+# 1. 优先使用 -L 指定 sysroot 路径
+# 2. 使用 -rpath-link 解决库的间接依赖问题
+# 3. 确保 dynamic-linker 路径正确 (OpenWrt glibc 常用路径)
+ENV CARGO_TARGET_ARMV7_UNKNOWN_LINUX_GNUEABIHF_LINKER=arm-linux-gnueabihf-gcc
+ENV CARGO_TARGET_ARMV7_UNKNOWN_LINUX_GNUEABIHF_RUSTFLAGS="\
+    -C link-arg=--sysroot=/opt/sysroot \
+    -C link-arg=-Wl,-dynamic-linker,/lib/ld-linux-armhf.so.3 \
+    -C link-arg=-L/opt/sysroot/usr/lib \
+    -C link-arg=-L/opt/sysroot/lib \
+    -C link-arg=-Wl,-rpath-link,/opt/sysroot/usr/lib \
+    -C link-arg=-Wl,-rpath-link,/opt/sysroot/lib"
+
+# 强制 pkg-config 只在 sysroot 中寻找，忽略宿主机容器路径
+ENV PKG_CONFIG_ALLOW_CROSS=1
+ENV PKG_CONFIG_SYSROOT_DIR=/opt/sysroot
+ENV PKG_CONFIG_LIBDIR=/opt/sysroot/usr/lib/pkgconfig:/opt/sysroot/lib/pkgconfig
+
+# 设置编译器，强制指定 sysroot
+ENV CC_armv7_unknown_linux_gnueabihf="arm-linux-gnueabihf-gcc --sysroot=/opt/sysroot"
+
 CMD ["/bin/bash"]
@@ -12,25 +12,19 @@ PROXY="http://host.docker.internal:7890"
 #     --build-arg https_proxy=$PROXY \
 #     -t open-xiaoai-runtime .

-# # 2. 编译 hello world demo
+# 2. 编译 hello world demo
 echo "Compiling hello demo..."
-rm -rf ../hello/target # 先清理旧的构建产物，防止缓存干扰
 docker run --rm -v $(pwd)/../hello:/app/hello open-xiaoai-runtime \
    cargo build --manifest-path hello/Cargo.toml --target armv7-unknown-linux-gnueabihf --release

-# # 3. 运行编译出的二进制文件 (通过 QEMU 模拟)
-echo "Running compiled binary via QEMU..."
-docker run --rm -v $(pwd)/../hello/target/armv7-unknown-linux-gnueabihf/release/hello:/app/hello \
-    -v $(pwd)/root.squashfs:/app/root.squashfs open-xiaoai-runtime \
-    run /app/hello
+# 3. 运行编译出的二进制文件 (通过 QEMU 模拟)
+# echo "Running compiled binary via QEMU..."
+# docker run --rm -v $(pwd)/../hello/target/armv7-unknown-linux-gnueabihf/release/hello:/app/hello open-xiaoai-runtime \
+#     run /app/hello

 # 4. 交互模式运行
-# docker run --rm -it --privileged \
-#     -v $(pwd)/root.squashfs:/app/root.squashfs \
-#     open-xiaoai-runtime \
-#     run
+# docker run --rm -it --privileged open-xiaoai-runtime run

 # 5. 上传二进制文件到小爱音箱
-# dd if=target/armv7-unknown-linux-gnueabihf/release/hello \
-# | ssh -o HostKeyAlgorithms=+ssh-rsa root@192.168.31.235 "dd of=/data/hello"
-# ssh -o HostKeyAlgorithms=+ssh-rsa root@192.168.31.235 "dd if=/data/hello" | hello
+# dd if=apps/hello/target/armv7-unknown-linux-gnueabihf/release/hello \
+# | ssh -o HostKeyAlgorithms=+ssh-rsa root@192.168.31.235 "dd of=/data/hello"
@@ -5,24 +5,6 @@ set -e
 # 定义 sysroot 目录
 SYSROOT_DIR="/opt/sysroot"

-# 如果 /opt/sysroot 已经有内容（通过 -v 挂载了 squashfs-root），则跳过解压
-if [ -d "$SYSROOT_DIR/bin" ] || [ -d "$SYSROOT_DIR/lib" ]; then
-    echo "Using existing sysroot at $SYSROOT_DIR"
-else
-    mkdir -p "$SYSROOT_DIR"
-    # 优先使用环境变量指定的 squashfs 文件，否则使用默认的 root.squashfs
-    ROOTFS_FILE="${SYSROOT_FILE:-root.squashfs}"
-    
-    if [ -f "$ROOTFS_FILE" ]; then
-        echo -e "\n🔥 Unsquashing $ROOTFS_FILE to $SYSROOT_DIR...\n"
-        unsquashfs -d "$SYSROOT_DIR" -f "$ROOTFS_FILE"
-        echo -e "\n✅ Unsquashed rootfs\n"
-    else
-        echo "Error: Sysroot file $ROOTFS_FILE not found and $SYSROOT_DIR is empty."
-        exit 1
-    fi
-fi
-
 # 检查第一个参数。如果在 sysroot 下存在该文件，则自动补全路径
 # 比如 `run /bin/sh` 会被转换为 `run /opt/sysroot/bin/sh`
 if [ -n "$1" ] && [ -f "$SYSROOT_DIR$1" ]; then