makefiles: make all, clean and distclean PHONY

Avoid a stat() call for each affected target and also potentially speed
up parallel builds.

From the GNU make manual[1]:

> Phony targets are also useful in conjunction with recursive
> invocations of make (see Recursive Use of make).  In this situation
> the makefile will often contain a variable which lists a number of
> sub-directories to be built.

[...]

> The implicit rule search (see Implicit Rules) is skipped for .PHONY
> targets.  This is why declaring a target as .PHONY is good for
> performance, even if you are not worried about the actual file
> existing.

Commands used to search, replace and cleanup:

    $ find -type f -name '*Makefile.in' -exec sed -i.bak \
      -e 's/^all:/.PHONY: all\nall:/' \
      -e 's/^clean:/.PHONY: clean\nclean:/' \
      -e 's/^distclean:/.PHONY: distclean\ndistclean:/' '{}' +
    $ find -type f -name '*Makefile.in.bak' -exec rm '{}' +

[1]: https://www.gnu.org/software/make/manual/html_node/Phony-Targets.html

Makefile.in

@@ -23,6 +23,7 @@ endif
 
 COMPLETIONDIRS = src/zsh_completion src/bash_completion
 
+.PHONY: all
 all: all_items mydirs $(MAN_TARGET) filters
 APPS = src/firecfg/firecfg src/firejail/firejail src/firemon/firemon src/profstats/profstats src/jailtest/jailtest
 SBOX_APPS = src/fbuilder/fbuilder src/ftee/ftee
@@ -72,6 +73,7 @@ seccomp.mdwx: src/fseccomp/fseccomp
 seccomp.mdwx.32: src/fseccomp/fseccomp
  src/fseccomp/fseccomp memory-deny-write-execute.32 seccomp.mdwx.32
 
+.PHONY: clean
 clean:
  for dir in $$(dirname $(ALL_ITEMS)) $(MYDIRS); do \
  $(MAKE) -C $$dir clean; \
@@ -91,6 +93,7 @@ clean:
  rm -f test/sysutils/firejail_t*
  cd test/compile; ./compile.sh --clean; cd ../..
 
+.PHONY: distclean
 distclean: clean
  for dir in $$(dirname $(ALL_ITEMS)) $(MYDIRS); do \
  $(MAKE) -C $$dir distclean; \

src/bash_completion/Makefile.in

@@ -1,3 +1,4 @@
+.PHONY: all
 all: firejail.bash_completion
 
 include ../common.mk
@@ -7,8 +8,10 @@ firejail.bash_completion: firejail.bash_completion.in
  sed "s|_SYSCONFDIR_|$(sysconfdir)|" < $@.tmp > $@
  rm $@.tmp
 
+.PHONY: clean
 clean:
  rm -fr firejail.bash_completion
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/fbuilder/Makefile.in

@@ -1,3 +1,4 @@
+.PHONY: all
 all: fbuilder
 
 include ../common.mk
@@ -8,7 +9,9 @@ include ../common.mk
 fbuilder: $(OBJS)
  $(CC) $(LDFLAGS) -o $@ $(OBJS) $(LIBS) $(EXTRA_LDFLAGS)
 
+.PHONY: clean
 clean:; rm -fr *.o fbuilder *.gcov *.gcda *.gcno *.plist
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/fcopy/Makefile.in

@@ -1,3 +1,4 @@
+.PHONY: all
 all: fcopy
 
 include ../common.mk
@@ -8,7 +9,9 @@ include ../common.mk
 fcopy: $(OBJS) ../lib/common.o
  $(CC) $(LDFLAGS) -o $@ $(OBJS) ../lib/common.o $(LIBS) $(EXTRA_LDFLAGS)
 
+.PHONY: clean
 clean:; rm -fr *.o fcopy *.gcov *.gcda *.gcno *.plist
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/firecfg/Makefile.in

@@ -1,3 +1,4 @@
+.PHONY: all
 all: firecfg
 
 include ../common.mk
@@ -8,7 +9,9 @@ include ../common.mk
 firecfg: $(OBJS) ../lib/common.o ../lib/firejail_user.o
  $(CC) $(LDFLAGS) -o $@ $(OBJS) ../lib/common.o ../lib/firejail_user.o $(LIBS) $(EXTRA_LDFLAGS)
 
+.PHONY: clean
 clean:; rm -fr *.o firecfg *.gcov *.gcda *.gcno *.plist
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/firejail/Makefile.in

@@ -1,3 +1,4 @@
+.PHONY: all
 all: firejail
 
 include ../common.mk
@@ -8,7 +9,9 @@ include ../common.mk
 firejail: $(OBJS) ../lib/libnetlink.o ../lib/common.o ../lib/ldd_utils.o ../lib/firejail_user.o ../lib/errno.o ../lib/syscall.o
  $(CC) $(LDFLAGS) -o $@ $(OBJS) ../lib/common.o ../lib/ldd_utils.o ../lib/firejail_user.o ../lib/errno.o ../lib/syscall.o $(LIBS) $(EXTRA_LDFLAGS)
 
+.PHONY: clean
 clean:; rm -fr *.o firejail *.gcov *.gcda *.gcno *.plist
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/firemon/Makefile.in

@@ -1,3 +1,4 @@
+.PHONY: all
 all: firemon
 
 include ../common.mk
@@ -8,7 +9,9 @@ include ../common.mk
 firemon: $(OBJS) ../lib/common.o ../lib/pid.o
  $(CC) $(LDFLAGS) -o $@ $(OBJS) ../lib/common.o ../lib/pid.o $(LIBS) $(EXTRA_LDFLAGS)
 
+.PHONY: clean
 clean:; rm -fr *.o firemon *.gcov *.gcda *.gcno *.plist
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/fldd/Makefile.in

@@ -1,3 +1,4 @@
+.PHONY: all
 all: fldd
 
 include ../common.mk
@@ -8,7 +9,9 @@ include ../common.mk
 fldd: $(OBJS) ../lib/common.o ../lib/ldd_utils.o
  $(CC) $(LDFLAGS) -o $@ $(OBJS) ../lib/common.o ../lib/ldd_utils.o $(LIBS) $(EXTRA_LDFLAGS)
 
+.PHONY: clean
 clean:; rm -fr *.o fldd *.gcov *.gcda *.gcno *.plist
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/fnet/Makefile.in

@@ -1,3 +1,4 @@
+.PHONY: all
 all: fnet
 
 include ../common.mk
@@ -8,7 +9,9 @@ include ../common.mk
 fnet: $(OBJS) ../lib/common.o ../lib/libnetlink.o
  $(CC) $(LDFLAGS) -o $@ $(OBJS) ../lib/common.o ../lib/libnetlink.o $(LIBS) $(EXTRA_LDFLAGS)
 
+.PHONY: clean
 clean:; rm -fr *.o fnet *.gcov *.gcda *.gcno *.plist
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/fnetfilter/Makefile.in

@@ -1,3 +1,4 @@
+.PHONY: all
 all: fnetfilter
 
 include ../common.mk
@@ -8,7 +9,9 @@ include ../common.mk
 fnetfilter: $(OBJS) ../lib/common.o
  $(CC) $(LDFLAGS) -o $@ $(OBJS) ../lib/common.o $(LIBS) $(EXTRA_LDFLAGS)
 
+.PHONY: clean
 clean:; rm -fr *.o fnetfilter *.gcov *.gcda *.gcno *.plist
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/fsec-optimize/Makefile.in

@@ -1,3 +1,4 @@
+.PHONY: all
 all: fsec-optimize
 
 include ../common.mk
@@ -8,7 +9,9 @@ include ../common.mk
 fsec-optimize: $(OBJS) ../lib/common.o ../lib/libnetlink.o
  $(CC) $(LDFLAGS) -o $@ $(OBJS) ../lib/common.o ../lib/errno.o $(LIBS) $(EXTRA_LDFLAGS)
 
+.PHONY: clean
 clean:; rm -fr *.o fsec-optimize *.gcov *.gcda *.gcno *.plist
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/fsec-print/Makefile.in

@@ -1,3 +1,4 @@
+.PHONY: all
 all: fsec-print
 
 include ../common.mk
@@ -8,7 +9,9 @@ include ../common.mk
 fsec-print: $(OBJS) ../lib/common.o ../lib/libnetlink.o ../lib/errno.o ../lib/syscall.o
  $(CC) $(LDFLAGS) -o $@ $(OBJS) ../lib/common.o ../lib/errno.o ../lib/syscall.o $(LIBS) $(EXTRA_LDFLAGS)
 
+.PHONY: clean
 clean:; rm -fr *.o fsec-print *.gcov *.gcda *.gcno *.plist
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/fseccomp/Makefile.in

@@ -1,3 +1,4 @@
+.PHONY: all
 all: fseccomp
 
 include ../common.mk
@@ -8,7 +9,9 @@ include ../common.mk
 fseccomp: $(OBJS) ../lib/common.o ../lib/errno.o ../lib/syscall.o
  $(CC) $(LDFLAGS) -o $@ $(OBJS) ../lib/common.o ../lib/errno.o ../lib/syscall.o $(LIBS) $(EXTRA_LDFLAGS)
 
+.PHONY: clean
 clean:; rm -fr *.o fseccomp *.gcov *.gcda *.gcno *.plist
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/ftee/Makefile.in

@@ -1,3 +1,4 @@
+.PHONY: all
 all: ftee
 
 include ../common.mk
@@ -8,7 +9,9 @@ include ../common.mk
 ftee: $(OBJS)
  $(CC) $(LDFLAGS) -o $@ $(OBJS) $(LIBS) $(EXTRA_LDFLAGS)
 
+.PHONY: clean
 clean:; rm -fr *.o ftee *.gcov *.gcda *.gcno *.plist
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/jailtest/Makefile.in

@@ -1,3 +1,4 @@
+.PHONY: all
 all: jailtest
 
 include ../common.mk
@@ -8,7 +9,9 @@ include ../common.mk
 jailtest: $(OBJS)
  $(CC) $(LDFLAGS) -o $@ $(OBJS) ../lib/common.o ../lib/pid.o $(LIBS) $(EXTRA_LDFLAGS)
 
+.PHONY: clean
 clean:; rm -fr *.o jailtest *.gcov *.gcda *.gcno *.plist
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/lib/Makefile.in

@@ -1,11 +1,14 @@
 include ../common.mk
 
+.PHONY: all
 all: $(OBJS)
 
 %.o : %.c $(H_FILE_LIST)
  $(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(INCLUDE) -c $< -o $@
 
+.PHONY: clean
 clean:; rm -fr $(OBJS) *.gcov *.gcda *.gcno *.plist
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/libpostexecseccomp/Makefile.in

@@ -11,6 +11,7 @@ BINOBJS = $(foreach file, $(OBJS), $file)
 CFLAGS += -ggdb $(HAVE_FATAL_WARNINGS) -O2 -DVERSION='"$(VERSION)"' -fstack-protector-all -D_FORTIFY_SOURCE=2 -fPIC -Wformat -Wformat-security
 LDFLAGS += -pie -fPIE -Wl,-z,relro -Wl,-z,now
 
+.PHONY: all
 all: libpostexecseccomp.so
 
 %.o : %.c $(H_FILE_LIST) ../include/seccomp.h ../include/rundefs.h
@@ -19,7 +20,9 @@ all: libpostexecseccomp.so
 libpostexecseccomp.so: $(OBJS)
  $(CC) $(LDFLAGS) -shared -fPIC -z relro -o $@ $(OBJS) -ldl
 
+.PHONY: clean
 clean:; rm -fr $(OBJS) libpostexecseccomp.so *.plist
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/libtrace/Makefile.in

@@ -11,6 +11,7 @@ BINOBJS = $(foreach file, $(OBJS), $file)
 CFLAGS += -ggdb $(HAVE_FATAL_WARNINGS) -O2 -DVERSION='"$(VERSION)"' -fstack-protector-all -D_FORTIFY_SOURCE=2 -fPIC -Wformat -Wformat-security
 LDFLAGS += -pie -fPIE -Wl,-z,relro -Wl,-z,now
 
+.PHONY: all
 all: libtrace.so
 
 %.o : %.c $(H_FILE_LIST)
@@ -19,7 +20,9 @@ all: libtrace.so
 libtrace.so: $(OBJS)
  $(CC) $(LDFLAGS) -shared -fPIC -z relro -o $@ $(OBJS) -ldl
 
+.PHONY: clean
 clean:; rm -fr $(OBJS) libtrace.so *.plist
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/libtracelog/Makefile.in

@@ -11,6 +11,7 @@ BINOBJS = $(foreach file, $(OBJS), $file)
 CFLAGS += -ggdb $(HAVE_FATAL_WARNINGS) -O2 -DVERSION='"$(VERSION)"' -fstack-protector-all -D_FORTIFY_SOURCE=2 -fPIC -Wformat -Wformat-security
 LDFLAGS += -pie -fPIE -Wl,-z,relro -Wl,-z,now
 
+.PHONY: all
 all: libtracelog.so
 
 %.o : %.c $(H_FILE_LIST) ../include/rundefs.h
@@ -19,7 +20,9 @@ all: libtracelog.so
 libtracelog.so: $(OBJS)
  $(CC) $(LDFLAGS) -shared -fPIC -z relro -o $@ $(OBJS) -ldl
 
+.PHONY: clean
 clean:; rm -fr $(OBJS) libtracelog.so *.plist
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/man/Makefile.in

@@ -1,11 +1,14 @@
+.PHONY: all
 all: firecfg.man firejail.man firejail-login.man firejail-users.man firejail-profile.man firemon.man jailtest.man
 
 include ../common.mk
 
 %.man: %.txt
  gawk -f ./preproc.awk -- $(MANFLAGS) < $< > $@
 
+.PHONY: clean
 clean:; rm -fr *.man
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/profstats/Makefile.in

@@ -1,3 +1,4 @@
+.PHONY: all
 all: profstats
 
 include ../common.mk
@@ -8,7 +9,9 @@ include ../common.mk
 profstats: $(OBJS)
  $(CC) $(LDFLAGS) -o $@ $(OBJS) $(LIBS) $(EXTRA_LDFLAGS)
 
+.PHONY: clean
 clean:; rm -fr *.o profstats *.gcov *.gcda *.gcno *.plist
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

src/zsh_completion/Makefile.in

@@ -1,3 +1,4 @@
+.PHONY: all
 all: _firejail
 
 include ../common.mk
@@ -7,8 +8,10 @@ _firejail: _firejail.in
  sed "s|_SYSCONFDIR_|$(sysconfdir)|" < $@.tmp > $@
  rm $@.tmp
 
+.PHONY: clean
 clean:
  rm -fr _firejail
 
+.PHONY: distclean
 distclean: clean
  rm -fr Makefile

test/Makefile.in

@@ -5,8 +5,10 @@ $(TESTS):
  cd $@ && ./$@.sh 2>&1 | tee $@.log
  cd $@ && grep -a TESTING $@.log && grep -a -L "TESTING ERROR" $@.log
 
+.PHONY: clean
 clean:
  for test in $(TESTS); do rm -f "$$test/$$test.log"; done
 
+.PHONY: distclean
 distclean: clean
  rm -f Makefile