GN: Android
Once you have downloaded an android NDK, you can set the ndk GN arg to use it.
E.g. my gn.args looks like:
is_debug = false
ndk = "/opt/android-ndk"
This should be enough to get you going for an arm64 build. You ought to be able to tweak that to other architectures by changing target_cpu to "arm", "x86", "x86-64", etc. That won't quite work until I follow this up a bit, but the skeleton is there.
This is enough to get me compiled, linked, and running to completion on my N5x.
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2275983004
Review-Url: https://codereview.chromium.org/2275983004
diff --git a/gn/BUILDCONFIG.gn b/gn/BUILDCONFIG.gn
index d683357..6aa4451 100644
--- a/gn/BUILDCONFIG.gn
+++ b/gn/BUILDCONFIG.gn
@@ -8,11 +8,15 @@
declare_args() {
is_debug = true
is_component_build = false
+ ndk = ""
}
# Platform detection
if (target_os == "") {
target_os = host_os
+ if (ndk != "") {
+ target_os = "android"
+ }
}
if (current_os == "") {
current_os = target_os
@@ -20,6 +24,9 @@
if (target_cpu == "") {
target_cpu = host_cpu
+ if (ndk != "") {
+ target_cpu = "arm64"
+ }
}
if (current_cpu == "") {
current_cpu = target_cpu
@@ -34,6 +41,22 @@
is_posix = !is_win
+if (is_android) {
+ ndk_host = ""
+ ndk_target = ""
+ ndk_platform = ""
+ ndk_stdlib = ""
+
+ if (host_os == "linux" && host_cpu == "x64") {
+ ndk_host = "linux-x86_64"
+ }
+ if (target_cpu == "arm64") {
+ ndk_target = "aarch64-linux-android"
+ ndk_platform = "android-21/arch-arm64"
+ ndk_stdlib = "arm64-v8a"
+ }
+}
+
# A component is either a static or a shared library.
template("component") {
_component_mode = "static_library"