Makefile: dedup list of files obtained from ls-files

diff --git a/Makefile b/Makefile
index 9f1b6e8926682c82530baa597794544b89d88c3a..c79e8ba7596983a6036d90e7158a5b48b22cb32e 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -822,12 +822,12 @@ VCSSVN_LIB = vcs-svn/lib.a
 
 GENERATED_H += command-list.h
 
-LIB_H := $(shell git ls-files '*.h' ':!t/' ':!Documentation/' 2>/dev/null || \
+LIB_H := $(sort $(shell git ls-files '*.h' ':!t/' ':!Documentation/' 2>/dev/null || \
        $(FIND) . \
        -name .git -prune -o \
        -name t -prune -o \
        -name Documentation -prune -o \
-       -name '*.h' -print)
+       -name '*.h' -print))
 
 LIB_OBJS += abspath.o
 LIB_OBJS += advice.o