xcode: add xcodePlatform to system

This give us a little bit more control over what target we are using.
Eventually we can target other things like WatchOS or MacOS.

1 files changed, 71 insertions, 0 deletions

diff --git a/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix b/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix
new file mode 100644
index 00000000000..d5ed21cd9e2
--- /dev/null
+++ b/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix
@@ -0,0 +1,71 @@
+{ lib, hostPlatform, targetPlatform
+, clang-unwrapped
+, binutils-unwrapped
+, runCommand
+, stdenv
+, wrapBintoolsWith
+, wrapCCWith
+, buildIosSdk, targetIosSdkPkgs
+, xcode
+}:
+
+let
+
+minSdkVersion = "9.0";
+
+iosPlatformArch = { parsed, ... }: {
+  "armv7a"  = "armv7";
+  "aarch64" = "arm64";
+  "x86_64"  = "x86_64";
+}.${parsed.cpu.name};
+
+in
+
+rec {
+  sdk = rec {
+    name = "ios-sdk";
+    type = "derivation";
+    outPath = xcode + "/Contents/Developer/Platforms/${platform}.platform/Developer/SDKs/${platform}${version}.sdk";
+
+    platform = targetPlatform.xcodePlatform;
+    version = targetPlatform.sdkVer;
+  };
+
+  binutils = wrapBintoolsWith {
+    libc = targetIosSdkPkgs.libraries;
+    bintools = binutils-unwrapped;
+    extraBuildCommands = ''
+      echo "-arch ${iosPlatformArch targetPlatform}" >> $out/nix-support/libc-ldflags
+    '';
+  };
+
+  clang = (wrapCCWith {
+    cc = clang-unwrapped;
+    bintools = binutils;
+    libc = targetIosSdkPkgs.libraries;
+    extraBuildCommands = ''
+      tr '\n' ' ' < $out/nix-support/cc-cflags > cc-cflags.tmp
+      mv cc-cflags.tmp $out/nix-support/cc-cflags
+      echo "-target ${targetPlatform.config} -arch ${iosPlatformArch targetPlatform}" >> $out/nix-support/cc-cflags
+      echo "-isystem ${sdk}/usr/include -isystem ${sdk}/usr/include/c++/4.2.1/ -stdlib=libstdc++" >> $out/nix-support/cc-cflags
+    '' + stdenv.lib.optionalString (sdk.platform == "iPhoneSimulator") ''
+      echo "-mios-simulator-version-min=${minSdkVersion}" >> $out/nix-support/cc-cflags
+    '' + stdenv.lib.optionalString (sdk.platform == "iPhoneOS") ''
+      echo "-miphoneos-version-min=${minSdkVersion}" >> $out/nix-support/cc-cflags
+    '';
+  }) // {
+    inherit sdk;
+  };
+
+  libraries = let sdk = buildIosSdk; in runCommand "libSystem-prebuilt" {
+    passthru = {
+      inherit sdk;
+    };
+  } ''
+    if ! [ -d ${sdk} ]; then
+        echo "You must have version ${sdk.version} of the ${sdk.platform} sdk installed at ${sdk}" >&2
+        exit 1
+    fi
+    ln -s ${sdk}/usr $out
+  '';
+}