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-rw-r--r--usrp2/firmware/Makefile.common2
1 files changed, 1 insertions, 1 deletions
diff --git a/usrp2/firmware/Makefile.common b/usrp2/firmware/Makefile.common
index b90696fea..d45576201 100644
--- a/usrp2/firmware/Makefile.common
+++ b/usrp2/firmware/Makefile.common
@@ -23,7 +23,7 @@ HAL_IO = -DHAL_IO_USES_UART
AM_CPPFLAGS = $(HAL_IO) $(STD_INCLUDES)
-STD_CFLAGS = -Wall -Werror-implicit-function-declaration -mxl-soft-div -msoft-float
+STD_CFLAGS = --std=gnu99 -Wall -Werror-implicit-function-declaration -mxl-soft-div -msoft-float
AM_CFLAGS = $(STD_CFLAGS) -mxl-soft-mul -mxl-barrel-shift
#AM_CFLAGS = $(STD_CFLAGS) -mxl-soft-mul -mxl-barrel-shift -mxl-gp-opt -G 16384