Use -Werror in external/libvterm

* Suppress unused-function warnings: mk_wcswidth and mk_wcswidth_cjk.

Bug: 66996870
Test: build with WITH_TIDY=1
Change-Id: Ic61d79221bcb7d347e1c97c1cb1488bf7f100bf5

1 files changed, 3 insertions, 0 deletions

diff --git a/Android.bp b/Android.bp
index b09fd43..33d3b75 100644
--- a/Android.bp
+++ b/Android.bp
@@ -16,8 +16,11 @@ cc_library_static {
 
     cflags: [
         "-std=c99",
+        "-Wall",
+        "-Werror",
         "-Wno-missing-field-initializers",
         "-Wno-sign-compare",
+        "-Wno-unused-function",
         "-Wno-unused-parameter",
     ],
 }