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-rwxr-xr-xtools/configure2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/configure b/tools/configure
index 77884ef02c..f2626492fb 100755
--- a/tools/configure
+++ b/tools/configure
@@ -9,7 +9,7 @@
#
# global CC options for all platforms
-CCOPTS="-W -Wall -O -nostdlib -ffreestanding -Wstrict-prototypes"
+CCOPTS="-W -Wall -Wundef -O -nostdlib -ffreestanding -Wstrict-prototypes"
use_logf="#undef ROCKBOX_HAS_LOGF"
use_simsound="#undef ROCKBOX_HAS_SIMSOUND"