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-rw-r--r--ports/javascript/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/ports/javascript/Makefile b/ports/javascript/Makefile
index 384253e54..4f9dd444b 100644
--- a/ports/javascript/Makefile
+++ b/ports/javascript/Makefile
@@ -19,7 +19,7 @@ ifdef EMSCRIPTEN
CPP += -isystem $(EMSCRIPTEN)/system/include/libc -cxx-isystem $(EMSCRIPTEN)/system/include/libcxx
endif
-CFLAGS = -m32 -Wall -Werror $(INC) -std=c99 $(COPT)
+CFLAGS = -m32 -Wall -Werror -Wdouble-promotion -Wfloat-conversion $(INC) -std=c99 $(COPT)
LDFLAGS = -m32 -Wl,-Map=$@.map,--cref -Wl,--gc-sections
CFLAGS += -O0 -DNDEBUG