Fixes for ancient versions of GNU make

Some versions of GNU make do not understand $(call), and have problems to
interpret rules like this:

some_target: CFLAGS += -Dsome=defs

[jc: simplified substitution a bit. ]

Signed-off-by: Johannes E. Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>

Makefile

@@ -204,12 +204,6 @@ LIB_OBJS = \
 LIBS = $(LIB_FILE)
 LIBS += -lz
 
-# Shell quote;
-# Result of this needs to be placed inside ''
-shq = $(subst ','\'',$(1))
-# This has surrounding ''
-shellquote = '$(call shq,$(1))'
-
 #
 # Platform specific tweaks
 #
@@ -422,7 +416,21 @@ ifdef NO_ACCURATE_DIFF
 	ALL_CFLAGS += -DNO_ACCURATE_DIFF
 endif
 
-ALL_CFLAGS += -DSHA1_HEADER=$(call shellquote,$(SHA1_HEADER)) $(COMPAT_CFLAGS)
+# Shell quote (do not use $(call) to accomodate ancient setups);
+
+SHA1_HEADER_SQ = $(subst ','\'',$(SHA1_HEADER))
+
+DESTDIR_SQ = $(subst ','\'',$(DESTDIR))
+bindir_SQ = $(subst ','\'',$(bindir))
+gitexecdir_SQ = $(subst ','\'',$(gitexecdir))
+template_dir_SQ = $(subst ','\'',$(template_dir))
+
+SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
+PERL_PATH_SQ = $(subst ','\'',$(PERL_PATH))
+PYTHON_PATH_SQ = $(subst ','\'',$(PYTHON_PATH))
+GIT_PYTHON_DIR_SQ = $(subst ','\'',$(GIT_PYTHON_DIR))
+
+ALL_CFLAGS += -DSHA1_HEADER='$(SHA1_HEADER_SQ)' $(COMPAT_CFLAGS)
 LIB_OBJS += $(COMPAT_OBJS)
 export prefix TAR INSTALL DESTDIR SHELL_PATH template_dir
 ### Build rules
@@ -441,7 +449,7 @@ git$X: git.c $(LIB_FILE)
 
 $(patsubst %.sh,%,$(SCRIPT_SH)) : % : %.sh
 	rm -f $@
-	sed -e '1s|#!.*/sh|#!$(call shq,$(SHELL_PATH))|' \
+	sed -e '1s|#!.*/sh|#!$(SHELL_PATH_SQ)|' \
 	    -e 's/@@GIT_VERSION@@/$(GIT_VERSION)/g' \
 	    -e 's/@@NO_CURL@@/$(NO_CURL)/g' \
 	    -e 's/@@NO_PYTHON@@/$(NO_PYTHON)/g' \
@@ -450,15 +458,15 @@ $(patsubst %.sh,%,$(SCRIPT_SH)) : % : %.sh
 
 $(patsubst %.perl,%,$(SCRIPT_PERL)) : % : %.perl
 	rm -f $@
-	sed -e '1s|#!.*perl|#!$(call shq,$(PERL_PATH))|' \
+	sed -e '1s|#!.*perl|#!$(PERL_PATH_SQ)|' \
 	    -e 's/@@GIT_VERSION@@/$(GIT_VERSION)/g' \
 	    $@.perl >$@
 	chmod +x $@
 
 $(patsubst %.py,%,$(SCRIPT_PYTHON)) : % : %.py
 	rm -f $@
-	sed -e '1s|#!.*python|#!$(call shq,$(PYTHON_PATH))|' \
-	    -e 's|@@GIT_PYTHON_PATH@@|$(call shq,$(GIT_PYTHON_DIR))|g' \
+	sed -e '1s|#!.*python|#!$(PYTHON_PATH_SQ)|' \
+	    -e 's|@@GIT_PYTHON_PATH@@|$(GIT_PYTHON_DIR_SQ)|g' \
 	    -e 's/@@GIT_VERSION@@/$(GIT_VERSION)/g' \
 	    $@.py >$@
 	chmod +x $@
@@ -484,32 +492,42 @@ git$X git.spec \
 %.o: %.S
 	$(CC) -o $*.o -c $(ALL_CFLAGS) $<
 
-exec_cmd.o: ALL_CFLAGS += -DGIT_EXEC_PATH=\"$(gitexecdir)\"
+exec_cmd.o: exec_cmd.c
+	$(CC) -o $*.o -c $(ALL_CFLAGS) '-DGIT_EXEC_PATH="$(gitexecdir_SQ)"' $<
 
 git-%$X: %.o $(LIB_FILE)
 	$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) $(LIBS)
 
-git-mailinfo$X : SIMPLE_LIB += $(LIB_4_ICONV)
 $(SIMPLE_PROGRAMS) : $(LIB_FILE)
 $(SIMPLE_PROGRAMS) : git-%$X : %.o
 	$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) \
 		$(LIB_FILE) $(SIMPLE_LIB)
 
-git-http-fetch$X: fetch.o http.o
-git-http-push$X: http.o
+git-mailinfo$X: mailinfo.o $(LIB_FILE)
+	$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) \
+		$(LIB_FILE) $(SIMPLE_LIB) $(LIB_4_ICONV)
+
 git-local-fetch$X: fetch.o
 git-ssh-fetch$X: rsh.o fetch.o
 git-ssh-upload$X: rsh.o
 git-ssh-pull$X: rsh.o fetch.o
 git-ssh-push$X: rsh.o
 
-git-http-fetch$X: LIBS += $(CURL_LIBCURL)
-git-http-push$X: LIBS += $(CURL_LIBCURL) $(EXPAT_LIBEXPAT)
-git-rev-list$X: LIBS += $(OPENSSL_LIBSSL)
+git-http-fetch$X: fetch.o http.o http-fetch.o
+	$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) \
+		$(LIBS) $(CURL_LIBCURL)
+
+git-http-push$X: http.o http-push.o
+	$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) \
+		$(LIBS) $(CURL_LIBCURL) $(EXPAT_LIBEXPAT)
+
+git-rev-list$X: rev-list.o
+	$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) \
+		$(LIBS) $(OPENSSL_LIBSSL)
 
 init-db.o: init-db.c
 	$(CC) -c $(ALL_CFLAGS) \
-		-DDEFAULT_GIT_TEMPLATE_DIR=$(call shellquote,"$(template_dir)") $*.c
+		-DDEFAULT_GIT_TEMPLATE_DIR='"$(template_dir_SQ)"' $*.c
 
 $(LIB_OBJS): $(LIB_H)
 $(patsubst git-%$X,%.o,$(PROGRAMS)): $(LIB_H)
@@ -547,13 +565,13 @@ check:
 ### Installation rules
 
 install: all
-	$(INSTALL) -d -m755 $(call shellquote,$(DESTDIR)$(bindir))
-	$(INSTALL) -d -m755 $(call shellquote,$(DESTDIR)$(gitexecdir))
-	$(INSTALL) $(ALL_PROGRAMS) $(call shellquote,$(DESTDIR)$(gitexecdir))
-	$(INSTALL) git$X gitk $(call shellquote,$(DESTDIR)$(bindir))
+	$(INSTALL) -d -m755 '$(DESTDIR_SQ)$(bindir_SQ)'
+	$(INSTALL) -d -m755 '$(DESTDIR_SQ)$(gitexecdir_SQ)'
+	$(INSTALL) $(ALL_PROGRAMS) '$(DESTDIR_SQ)$(gitexecdir_SQ)'
+	$(INSTALL) git$X gitk '$(DESTDIR_SQ)$(bindir_SQ)'
 	$(MAKE) -C templates install
-	$(INSTALL) -d -m755 $(call shellquote,$(DESTDIR)$(GIT_PYTHON_DIR))
-	$(INSTALL) $(PYMODULES) $(call shellquote,$(DESTDIR)$(GIT_PYTHON_DIR))
+	$(INSTALL) -d -m755 '$(DESTDIR_SQ)$(GIT_PYTHON_DIR_SQ)'
+	$(INSTALL) $(PYMODULES) '$(DESTDIR_SQ)$(GIT_PYTHON_DIR_SQ)'
 
 install-doc:
 	$(MAKE) -C Documentation install

t/Makefile

@@ -8,10 +8,7 @@ SHELL_PATH ?= $(SHELL)
 TAR ?= $(TAR)
 
 # Shell quote;
-# Result of this needs to be placed inside ''
-shq = $(subst ','\'',$(1))
-# This has surrounding ''
-shellquote = '$(call shq,$(1))'
+SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
 
 T = $(wildcard t[0-9][0-9][0-9][0-9]-*.sh)
 
@@ -22,7 +19,7 @@ endif
 all: $(T) clean
 
 $(T):
-	@echo "*** $@ ***"; $(call shellquote,$(SHELL_PATH)) $@ $(GIT_TEST_OPTS)
+	@echo "*** $@ ***"; '$(SHELL_PATH_SQ)' $@ $(GIT_TEST_OPTS)
 
 clean:
 	rm -fr trash