[PATCH i2c-tools] tools: allow to preset TOOLS_CFLAGS and TOOLS_LDFLAGS

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Sometimes I need to add some flags (like -static for the linker), so
allow this.

Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxx>
---

Jean, what do you think?

 tools/Module.mk | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/Module.mk b/tools/Module.mk
index 693102f..f5b133d 100644
--- a/tools/Module.mk
+++ b/tools/Module.mk
@@ -9,13 +9,13 @@
 
 TOOLS_DIR	:= tools
 
-TOOLS_CFLAGS	:= -Wstrict-prototypes -Wshadow -Wpointer-arith -Wcast-qual \
+TOOLS_CFLAGS	+= -Wstrict-prototypes -Wshadow -Wpointer-arith -Wcast-qual \
 		   -Wcast-align -Wwrite-strings -Wnested-externs -Winline \
 		   -W -Wundef -Wmissing-prototypes -Iinclude
 ifeq ($(USE_STATIC_LIB),1)
-TOOLS_LDFLAGS	:= $(LIB_DIR)/$(LIB_STLIBNAME)
+TOOLS_LDFLAGS	+= $(LIB_DIR)/$(LIB_STLIBNAME)
 else
-TOOLS_LDFLAGS	:= -L$(LIB_DIR) -li2c
+TOOLS_LDFLAGS	+= -L$(LIB_DIR) -li2c
 endif
 
 TOOLS_TARGETS	:= i2cdetect i2cdump i2cset i2cget i2ctransfer
-- 
2.27.0




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