5 files changed, 25 insertions, 9 deletions

diff --git a/src/bash_completion/Makefile b/src/bash_completion/Makefile
index c7ef6afc6..c06323f64 100644
--- a/src/bash_completion/Makefile
+++ b/src/bash_completion/Makefile
@@ -2,14 +2,17 @@
 ROOT = ../..
 -include $(ROOT)/config.mk
 
+GAWK ?= gawk
+RM ?= rm -f
+
 .PHONY: all
 all: firejail.bash_completion
 
 firejail.bash_completion: firejail.bash_completion.in $(ROOT)/config.mk
         $(GAWK) -f ../man/preproc.awk -- $(MANFLAGS) < $< > $@.tmp
         sed "s|_SYSCONFDIR_|$(sysconfdir)|" < $@.tmp > $@
-        rm $@.tmp
+        $(RM) $@.tmp
 
 .PHONY: clean
 clean:
-        rm -fr firejail.bash_completion
+        $(RM) -r firejail.bash_completion
diff --git a/src/man/Makefile b/src/man/Makefile
index 1c1fd49a5..767920e2b 100644
--- a/src/man/Makefile
+++ b/src/man/Makefile
@@ -2,6 +2,10 @@
 ROOT = ../..
 -include $(ROOT)/config.mk
 
+GAWK ?= gawk
+GZIP ?= gzip
+RM ?= rm -f
+
 MOD_DIR := $(ROOT)/src/man
 MANPAGES_IN := $(sort $(wildcard $(MOD_DIR)/*.in))
 MANPAGES_GZ := $(MANPAGES_IN:.in=.gz)
@@ -19,8 +23,8 @@ $(MOD_DIR)/%: $(MOD_DIR)/%.in $(ROOT)/config.mk
 # foo.1.gz: foo.1
 $(MOD_DIR)/%.gz: $(MOD_DIR)/%
         @printf 'Generating %s from %s\n' $@ $<
-        @rm -f $@
-        @gzip -n9 $<
+        @$(RM) $@
+        @$(GZIP) -n9 $<
 
 .PHONY: clean
-clean:; rm -f *.1 *.5 *.gz
+clean:; $(RM) *.1 *.5 *.gz
diff --git a/src/prog.mk b/src/prog.mk
index a639e87fc..3e89a6ba8 100644
--- a/src/prog.mk
+++ b/src/prog.mk
@@ -5,6 +5,9 @@
 # The includer should probably define PROG and TARGET and may also want to
 # define EXTRA_OBJS and extend CLEANFILES.
 
+CC ?= cc
+RM ?= rm -f
+
 HDRS :=
 SRCS := $(sort $(wildcard $(MOD_DIR)/*.c))
 OBJS := $(SRCS:.c=.o)
@@ -25,4 +28,4 @@ $(PROG): $(OBJS) $(EXTRA_OBJS) $(ROOT)/config.mk
         $(CC) $(PROG_LDFLAGS) $(LDFLAGS) -o $@ $(OBJS) $(EXTRA_OBJS) $(LIBS)
 
 .PHONY: clean
-clean:; rm -fr $(PROG) $(CLEANFILES)
+clean:; $(RM) -r $(PROG) $(CLEANFILES)
diff --git a/src/so.mk b/src/so.mk
index ac76ffc30..63a0da7ce 100644
--- a/src/so.mk
+++ b/src/so.mk
@@ -5,6 +5,9 @@
 # The includer should probably define SO and TARGET and may also want to define
 # EXTRA_OBJS and extend CLEANFILES.
 
+CC ?= cc
+RM ?= rm -f
+
 HDRS :=
 SRCS := $(sort $(wildcard $(MOD_DIR)/*.c))
 OBJS := $(SRCS:.c=.o)
@@ -25,4 +28,4 @@ $(SO): $(OBJS) $(EXTRA_OBJS) $(ROOT)/config.mk
         $(CC) $(SO_LDFLAGS) -shared $(LDFLAGS) -o $@ $(OBJS) $(EXTRA_OBJS) -ldl
 
 .PHONY: clean
-clean:; rm -fr $(SO) $(CLEANFILES)
+clean:; $(RM) -r $(SO) $(CLEANFILES)
diff --git a/src/zsh_completion/Makefile b/src/zsh_completion/Makefile
index e964d39ec..cbc476a73 100644
--- a/src/zsh_completion/Makefile
+++ b/src/zsh_completion/Makefile
@@ -2,14 +2,17 @@
 ROOT = ../..
 -include $(ROOT)/config.mk
 
+GAWK ?= gawk
+RM ?= rm -f
+
 .PHONY: all
 all: _firejail
 
 _firejail: _firejail.in $(ROOT)/config.mk
         $(GAWK) -f ../man/preproc.awk -- $(MANFLAGS) < $< > $@.tmp
         sed "s|_SYSCONFDIR_|$(sysconfdir)|" < $@.tmp > $@
-        rm $@.tmp
+        $(RM) $@.tmp
 
 .PHONY: clean
 clean:
-        rm -fr _firejail
+        $(RM) -r _firejail