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-rw-r--r--macros.mk1
1 files changed, 1 insertions, 0 deletions
diff --git a/macros.mk b/macros.mk
index af9801c..cf86dff 100644
--- a/macros.mk
+++ b/macros.mk
@@ -7,6 +7,7 @@ CC?=clang
LLVM_CONF?=llvm-config
BUILD_MODE?=COV_NO_CLANG_1Z
SHELL:=/bin/bash
+MAKEFLAGS+=--warn-undefined-variables
CXX_FLAGS=$(shell $(LLVM_CONF) --cxxflags)