wincred: add install target and avoid overwriting configured variables.

Signed-off-by: Pat Thoyts <[email protected]>

Author: patthoyts

contrib/credential/wincred/Makefile

@@ -1,14 +1,20 @@
-all: git-credential-wincred.exe
-
-CC = gcc
-RM = rm -f
-CFLAGS = -O2 -Wall
-
 -include ../../../config.mak.autogen
 -include ../../../config.mak
 
-git-credential-wincred.exe : git-credential-wincred.c
+prefix ?= /usr/local
+libexecdir ?= $(prefix)/libexec/git-core
+
+INSTALL ?= install
+
+GIT_CREDENTIAL_WINCRED := git-credential-wincred.exe
+
+all: $(GIT_CREDENTIAL_WINCRED)
+
+$(GIT_CREDENTIAL_WINCRED): git-credential-wincred.c
 	$(LINK.c) $^ $(LOADLIBES) $(LDLIBS) -o $@
 
+install: $(GIT_CREDENTIAL_WINCRED)
+	$(INSTALL) -m 755 $(GIT_CREDENTIAL_WINCRED) $(libexecdir)
+
 clean:
-	$(RM) git-credential-wincred.exe
+	$(RM) $(GIT_CREDENTIAL_WINCRED)