qemu-arm: Add support for TravisCI

.circleci/config.yml

@@ -95,13 +95,14 @@ jobs:
      RUMP: "linux"
    <<: *do_steps
 
-  qemu-arm-linux:
-   docker:
-     - image: lkldocker/circleci-x86_64:0.5
-   environment:
-     OS: "qemu-arm"
-     RUMP: "linux"
-   <<: *do_steps
+  # XXX: Forked version of QEMU is needed
+  # qemu-arm-linux:
+  #  docker:
+  #    - image: lkldocker/circleci-x86_64:0.5
+  #  environment:
+  #    OS: "qemu-arm"
+  #    RUMP: "linux"
+  #  <<: *do_steps
 
   linux-netbsd:
    docker:

.travis.yml

@@ -1,8 +1,33 @@
-language: c
+language: nix
 
-compiler:
-  - gcc
-  - clang
+matrix:
+  include:
+    - name: "GCC"
+      env: BUILD_TARGET=frankenlibc-gcc
+    - name: "Clang"
+      env: BUILD_TARGET=frankenlibc-clang
+    - name: "QEMU ARM"
+      env: BUILD_TARGET=frankenlibc-arm
+
+cache:
+  directories:
+    - $HOME/nix.store
+
+before_cache:
+  - rm -rf $HOME/nix.store
+  - mkdir -p $HOME/nix.store
+  - nix copy --to file://$HOME/nix.store -f default.nix buildInputs
+
+before_install:
+  - mkdir -p $HOME/.config/nix
+  - |
+    cat <<EOF > $HOME/.config/nix/nix.conf
+    substituters = https://cache.nixos.org/ file://$HOME/nix.store
+    require-sigs = false
+    EOF
+  - |
+    git clone https://github.com/libos-nuse/nixpkgs-lkl.git \
+      ~/.config/nixpkgs/overlays/nixpkgs-lkl
 
 script:
-  - ./build.sh
+  - nix-build -A "$BUILD_TARGET"

default.nix

@@ -0,0 +1,9 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+with pkgs;
+
+{
+  frankenlibc-gcc = callPackage ./frankenlibc.nix { };
+  frankenlibc-clang = callPackage ./frankenlibc.nix { stdenv = clangStdenv; };
+  frankenlibc-arm = callPackage ./frankenlibc.nix { armSupport = true; };
+}

frankenlibc.nix

@@ -0,0 +1,29 @@
+{ stdenv, gcc-arm-embedded, binutils-arm-embedded, qemu-circle
+, armSupport ? false
+}:
+
+stdenv.mkDerivation {
+  name = "frankenlibc";
+
+  src = ../.;
+
+  nativebuildInputs =
+    stdenv.lib.optionals armSupport [
+      gcc-arm-embedded
+      binutils-arm-embedded
+    ];
+
+  buildInputs = stdenv.lib.optionals armSupport [ qemu-circle ];
+
+  buildFlags = if armSupport then [ "-k linux" "qemu-arm" ] else [];
+
+  buildPhase = ''
+    ./build.sh ${buildFlags}
+  '';
+
+  installPhase = ''
+    cp -r . $out
+  '';
+
+  stdenv = if armSupport then overrideCC stdenv gcc-arm-embedded else stdenv;
+}