qa: add -Wshadow to appveyor builds

diff --git a/appveyor.yml b/appveyor.yml
index 6ff4c260d32499c196b5f21107b4268cb7e8dbb4..58915eddb2f563c0dfbedcfee345da6bb8d2561e 100644 (file)
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -15,6 +15,7 @@ environment:
           CYG_CACHE: C:\cygwin\var\cache\setup
           CYG_BASH: C:\cygwin\bin\bash
           CC: gcc
+          CFLAGS: -Wall -Wextra -Werror -Wshadow -Wno-unused-parameter -Wno-unused-function
 
 # Cache Cygwin files to speed up build
 cache: