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-rw-r--r--tools/Rules.in2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/Rules.in b/tools/Rules.in
index 10cb8c7..23f171a 100644
--- a/tools/Rules.in
+++ b/tools/Rules.in
@@ -16,7 +16,7 @@ all-dirs:=$(static-dirs) $(dynamic-dirs)
clean-dirs:=$(all-dirs) proto sysdep
dir-objs:=$(addprefix $(objdir)/,$(all-dirs))
-CPPFLAGS=-I$(root-rel) -I$(srcdir)
+CPPFLAGS=-I$(root-rel) -I$(srcdir) @CPPFLAGS@
CFLAGS=$(CPPFLAGS) @CFLAGS@
LDFLAGS=
LIBS=@LIBS@