gn build: Do not build libunwind.so for Android.

Android does not use a shared libunwind.so and its presence in the build
directory can be harmful, for example it can end up being dynamically
linked against while not being present on the device.

diff --git a/llvm/utils/gn/secondary/libunwind/src/BUILD.gn b/llvm/utils/gn/secondary/libunwind/src/BUILD.gn
index 6605e43..d5e15f2 100644 (file)
--- a/llvm/utils/gn/secondary/libunwind/src/BUILD.gn
+++ b/llvm/utils/gn/secondary/libunwind/src/BUILD.gn
@@ -74,7 +74,7 @@ config("unwind_config") {
   }
 }
 
-if (libunwind_enable_shared) {
+if (libunwind_enable_shared && target_os != "android") {
   shared_library("unwind_shared") {
     output_dir = unwind_output_dir
     output_name = "unwind"
@@ -138,7 +138,7 @@ if (libunwind_enable_static) {
 
 group("src") {
   deps = []
-  if (libunwind_enable_shared) {
+  if (libunwind_enable_shared && target_os != "android") {
     deps += [ ":unwind_shared" ]
   }
   if (libunwind_enable_static) {