error: variable ‘ParamName’ set but not used [Werror=unusedbutsetvariable]

frameworks/compile/slang/slang_rs_export_foreach.cpp:247:23: error: variable ‘ParamName’ set but not used [-Werror=unused-but-set-variable]
cc1plus: all warnings being treated as errors
解决方法：
$ vi frameworks/compile/slang/Android.mk
#local_cflags_for_slang := -Wno-sign-promo -Wall -Wno-unused-parameter -Werror
local_cflags_for_slang := -Wno-sign-promo -Wall -Wno-unused-parameter
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原文地址：https://www.cnblogs.com/googlegis/p/2978729.html