Add support for setting up GN on Linux & Mac.

README.md

@@ -3,13 +3,17 @@ GN Cross Compilation Buildroot
 
 A GN buildroot for setting up cross-compilation environments.
 
+Prerequisites
+-------------
+
+* A Mac or Linux host.
+
 Usage for Raspberry Pi
 ----------------------
 
-* Download the prepared toolchain and sysroot to the `out` directory `./tools/setup_sdk.sh`.
+* Download the prepared toolchain, sysroot and related tools to the `out` directory `./tools/setup_sdk.sh`.
   * This takes a while and downloads upto 1 GB of data from cloud storage.
 * Prepare the build output directory `out` with paths to your toolchain using `./tools/setup_gn.sh`.
-* Tell `gn` to use this out directory `gn gen out`.
 * Build using `ninja -C out` on your host.
   * Hack and repeat.
 * Push your executable to the Raspberry Pi and run.

tools/setup_gn.sh

@@ -15,3 +15,5 @@ echo "sysroot_path = \"${SDK_DIR}/sysroot\"" >> "${ARGS_GN}"
 echo "target_triple = \"arm-linux-gnueabihf\"" >> "${ARGS_GN}"
 echo "extra_system_include_dirs = [\"/opt/vc/include\"]" >> "${ARGS_GN}"
 echo "extra_system_lib_dirs = [\"/opt/vc/lib\"]" >> "${ARGS_GN}"
+
+"${SDK_DIR}/gn" gen "${OUT_DIR}"

tools/setup_sdk.sh

@@ -7,11 +7,14 @@ ReportError() {
 }
 
 TOOCHAIN_NAME=""
+GN_PLATFORM_NAME=""
 
 if [ "$(uname)" == "Darwin" ]; then
-    TOOLCHAIN_NAME="darwin-x64"
+  TOOLCHAIN_NAME="darwin-x64"
+  GN_PLATFORM_NAME="mac"
 elif [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
-	TOOLCHAIN_NAME="linux-x64"
+  TOOLCHAIN_NAME="linux-x64"
+  GN_PLATFORM_NAME="linux64"
 else
 	ReportError "This platform is not supported. Supported platforms are Darwin or Linux."
 	exit -1
@@ -24,12 +27,16 @@ rm -rf "${SDK_DIR}"
 mkdir -p "${SDK_DIR}"
 
 echo "Settng up Toolchain..."
-wget -O "${SDK_DIR}/toolchain.tar.gz" https://storage.googleapis.com/xcompile_sdk/pi/toolchain/${TOOLCHAIN_NAME}.tar.gz
+wget -O "${SDK_DIR}/toolchain.tar.gz" "https://storage.googleapis.com/xcompile_sdk/pi/toolchain/${TOOLCHAIN_NAME}.tar.gz"
 tar -xzvf "${SDK_DIR}/toolchain.tar.gz" -C "${SDK_DIR}"
 rm "${SDK_DIR}/toolchain.tar.gz"
 mv "${SDK_DIR}/${TOOLCHAIN_NAME}" "${SDK_DIR}/toolchain"
 
 echo "Setting up Sysroot..."
-wget -O "${SDK_DIR}/sysroot.tar.gz" https://storage.googleapis.com/xcompile_sdk/pi/sysroot.tar.gz
+wget -O "${SDK_DIR}/sysroot.tar.gz" "https://storage.googleapis.com/xcompile_sdk/pi/sysroot.tar.gz"
 tar -xzvf "${SDK_DIR}/sysroot.tar.gz" -C "${SDK_DIR}"
 rm "${SDK_DIR}/sysroot.tar.gz"
+
+echo "Setting up GN..."
+wget -O "${SDK_DIR}/gn" "https://storage.googleapis.com/fuchsia-build/fuchsia/gn/${GN_PLATFORM_NAME}/216b1a3e072f9e531abcf79600fa52fd729b1262"
+chmod +x "${SDK_DIR}/gn"