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-rw-r--r--makefiles/toolchain_gnu-arm-eabi.mk1
1 files changed, 1 insertions, 0 deletions
diff --git a/makefiles/toolchain_gnu-arm-eabi.mk b/makefiles/toolchain_gnu-arm-eabi.mk
index d214006be..5e6a5bf04 100644
--- a/makefiles/toolchain_gnu-arm-eabi.mk
+++ b/makefiles/toolchain_gnu-arm-eabi.mk
@@ -157,6 +157,7 @@ CXXFLAGS = $(ARCHCXXFLAGS) \
$(INSTRUMENTATIONDEFINES) \
$(ARCHDEFINES) \
$(EXTRADEFINES) \
+ -DCONFIG_WCHAR_BUILTIN \
$(addprefix -I,$(INCLUDE_DIRS))
# Flags we pass to the assembler