Merge branch 'tu/credential-makefile-updates'

Build procedure for a few credential helpers (in contrib/) have
been updated.

* tu/credential-makefile-updates:
  contrib/credential: harmonize Makefiles

Author: gitster

contrib/credential/libsecret/Makefile

@@ -1,28 +1,27 @@
 # The default target of this Makefile is...
-all::
-
-MAIN:=git-credential-libsecret
-all:: $(MAIN)
-
-CC = gcc
-RM = rm -f
-CFLAGS = -g -O2 -Wall
-PKG_CONFIG = pkg-config
+all:: git-credential-libsecret
 
 -include ../../../config.mak.autogen
 -include ../../../config.mak
 
+prefix ?= /usr/local
+gitexecdir ?= $(prefix)/libexec/git-core
+
+CC ?= gcc
+CFLAGS ?= -g -O2 -Wall
+PKG_CONFIG ?= pkg-config
+RM ?= rm -f
+
 INCS:=$(shell $(PKG_CONFIG) --cflags libsecret-1 glib-2.0)
 LIBS:=$(shell $(PKG_CONFIG) --libs libsecret-1 glib-2.0)
 
-SRCS:=$(MAIN).c
-OBJS:=$(SRCS:.c=.o)
-
 %.o: %.c
 	$(CC) $(CFLAGS) $(CPPFLAGS) $(INCS) -o $@ -c $<
 
-$(MAIN): $(OBJS)
-	$(CC) -o $@ $(LDFLAGS) $^ $(LIBS)
+git-credential-libsecret: git-credential-libsecret.o
+	$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS) $(LIBS)
 
 clean:
-	@$(RM) $(MAIN) $(OBJS)
+	$(RM) git-credential-libsecret git-credential-libsecret.o
+
+.PHONY: all clean

contrib/credential/osxkeychain/Makefile

@@ -1,19 +1,24 @@
 # The default target of this Makefile is...
 all:: git-credential-osxkeychain
 
-CC = gcc
-RM = rm -f
-CFLAGS = -g -O2 -Wall
-
 -include ../../../config.mak.autogen
 -include ../../../config.mak
 
+prefix ?= /usr/local
+gitexecdir ?= $(prefix)/libexec/git-core
+
+CC ?= gcc
+CFLAGS ?= -g -O2 -Wall
+RM ?= rm -f
+
+%.o: %.c
+	$(CC) $(CFLAGS) $(CPPFLAGS) -o $@ -c $<
+
 git-credential-osxkeychain: git-credential-osxkeychain.o
-	$(CC) $(CFLAGS) -o $@ $< $(LDFLAGS) \
+	$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS) \
 		-framework Security -framework CoreFoundation
 
-git-credential-osxkeychain.o: git-credential-osxkeychain.c
-	$(CC) -c $(CFLAGS) $<
-
 clean:
 	$(RM) git-credential-osxkeychain git-credential-osxkeychain.o
+
+.PHONY: all clean