Merge pull request #43 from adamgreen/gccWarnFlagUpdate

Updates to GCC warning level flags

Author: emilmont

workspace_tools/toolchains/gcc.py

@@ -47,7 +47,8 @@ def __init__(self, target, options=None, notify=None, tool_path=""):
 
         # Note: We are using "-O2" instead of "-Os" to avoid this known GCC bug:
         # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46762
-        common_flags = ["-c", "-O2", "-Wall",
+        common_flags = ["-c", "-O2", "-Wall", "-Wextra",
+            "-Wno-unused-parameter", "-Wno-missing-field-initializers",
             "-fmessage-length=0", "-fno-exceptions", "-fno-builtin",
             "-ffunction-sections", "-fdata-sections",
             "-MMD", "-fno-delete-null-pointer-checks",