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-rw-r--r--makefiles/toolchain_gnu-arm-eabi.mk2
1 files changed, 1 insertions, 1 deletions
diff --git a/makefiles/toolchain_gnu-arm-eabi.mk b/makefiles/toolchain_gnu-arm-eabi.mk
index 84e5cd08a..b98b1a0af 100644
--- a/makefiles/toolchain_gnu-arm-eabi.mk
+++ b/makefiles/toolchain_gnu-arm-eabi.mk
@@ -121,7 +121,7 @@ INSTRUMENTATIONDEFINES = $(ARCHINSTRUMENTATIONDEFINES_$(CONFIG_ARCH))
# Language-specific flags
#
ARCHCFLAGS = -std=gnu99
-ARCHCXXFLAGS = -fno-exceptions -fno-rtti -std=gnu++0x -fno-threadsafe-statics
+ARCHCXXFLAGS = -fno-exceptions -fno-rtti -std=gnu++0x -fno-threadsafe-statics -D__CUSTOM_FILE_IO__
# Generic warnings
#