Adding alsa lib and cpal

.devcontainer/Dockerfile

@@ -4,11 +4,22 @@ FROM mcr.microsoft.com/devcontainers/rust:1-1-bookworm
 # Install ARM cross-compilation toolchain packages
 RUN apt-get update && \
   apt-get install -y --no-install-recommends \
-    gdb-multiarch \
-    gcc-arm-linux-gnueabihf \
-    g++-arm-linux-gnueabihf \
-    binutils-arm-linux-gnueabihf && \
+  gdb-multiarch \
+  gcc-arm-linux-gnueabihf \
+  g++-arm-linux-gnueabihf \
+  binutils-arm-linux-gnueabihf && \
   apt-get clean && \
   rm -rf /var/lib/apt/lists/*
 
-RUN rustup target add armv7-unknown-linux-gnueabihf
+# install arm32 cross-compiler
+RUN dpkg --add-architecture armhf && \
+  apt update && \
+  apt install -y \
+  libasound2-dev:armhf && \
+  apt-get clean && \
+  rm -rf /var/lib/apt/lists/*
+
+RUN rustup target add armv7-unknown-linux-gnueabihf
+
+ENV PKG_CONFIG_LIBDIR=/usr/lib/arm-linux-gnueabihf/pkgconfig
+ENV PKG_CONFIG_ALLOW_CROSS=true