feat: add build shellbuild-shell

this will allow compiling the firmware using the previously packaged
toolchain in an FHS environment

1 files changed, 30 insertions, 0 deletions

diff --git a/firmware-build-shell.nix b/firmware-build-shell.nix
new file mode 100644
index 0000000..83f875e
--- /dev/null
+++ b/firmware-build-shell.nix
@@ -0,0 +1,30 @@
+{
+  buildFHSEnv,
+  toolchain,
+  toolchainDir ? "opt/toolchains/crosstools-arm-gcc-4.6-linux-3.4-uclibc-0.9.32-binutils-2.21-NPTL",
+}:
+(buildFHSEnv {
+  name = "firmware-build-env";
+
+  targetPkgs =
+    pkgs:
+    [
+      pkgs.gcc
+
+      # undocumented deps
+      pkgs.libuuid
+      pkgs.lzo
+    ]
+    ++ pkgs.linux.nativeBuildInputs;
+
+  extraOutputsToInstall = [ "dev" ];
+
+  extraBuildCommands = ''
+    mkdir -p ${toolchainDir}
+    ln -s ${toolchain} ${toolchainDir}/usr
+  '';
+
+  profile = ''
+    export PATH=/${toolchainDir}/usr/bin:"$PATH"
+  '';
+}).env