Makefile: add -Wshadow

Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/Makefile b/Makefile
index 8a28f62c0fb850838aa638b0dd21bf2a588f03f9..b7c164500da5bde510d3a0d64be03010ebc8eab4 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -17,7 +17,7 @@ endif
 DEBUGFLAGS = -D_FORTIFY_SOURCE=2 -DFIO_INC_DEBUG
 CPPFLAGS= -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -DFIO_INTERNAL $(DEBUGFLAGS)
 OPTFLAGS= -O3 -g -ffast-math
-CFLAGS = -std=gnu99 -Wwrite-strings -Wall -Wdeclaration-after-statement $(OPTFLAGS) $(EXTFLAGS) $(BUILD_CFLAGS)
+CFLAGS = -std=gnu99 -Wwrite-strings -Wall -Wshadow -Wdeclaration-after-statement $(OPTFLAGS) $(EXTFLAGS) $(BUILD_CFLAGS)
 LIBS   += -lm $(EXTLIBS)
 PROGS  = fio
 SCRIPTS = tools/fio_generate_plots tools/plot/fio2gnuplot tools/genfio