[PATCH] make: Make man page compression configurable

[Kurt Kanzenbach <kurt@linutronix.de>]

Currently the man pages are unconditionally gzip compressed. However, users
might want to use something else such as bzip2 or none.

When using package management systems it makes sense to use no compression at
all, as the package system might chose the appropriate one. Therefore, introduce
MAN_COMPRESSION. This variable is handling how the compression is done. Default
is gzip.

Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
---
 Makefile | 60 ++++++++++++++++++++++++++++++++++++++------------------
 1 file changed, 41 insertions(+), 19 deletions(-)

diff --git a/Makefile b/Makefile
index e2142ba3f4e9..ecbd5b1cb98b 100644
--- a/Makefile
+++ b/Makefile
@@ -34,6 +34,32 @@ LDFLAGS ?=
 
 PYLIB  ?= $(shell python3 -c 'import distutils.sysconfig;  print (distutils.sysconfig.get_python_lib())')
 
+MANPAGES = src/cyclictest/cyclictest.8 \
+	   src/pi_tests/pi_stress.8 \
+	   src/ptsematest/ptsematest.8 \
+	   src/rt-migrate-test/rt-migrate-test.8 \
+	   src/sigwaittest/sigwaittest.8 \
+	   src/svsematest/svsematest.8 \
+	   src/pmqtest/pmqtest.8 \
+	   src/hackbench/hackbench.8 \
+	   src/signaltest/signaltest.8 \
+	   src/pi_tests/pip_stress.8 \
+	   src/queuelat/queuelat.8 \
+	   src/sched_deadline/deadline_test.8 \
+	   src/ssdd/ssdd.8 \
+	   src/sched_deadline/cyclicdeadline.8
+
+ifdef PYLIB
+	MANPAGES += src/hwlatdetect/hwlatdetect.8
+endif
+
+MAN_COMPRESSION ?= gzip
+ifeq ($(MAN_COMPRESSION),gzip)
+	MANPAGES := $(MANPAGES:.8=.8.gz)
+else ifeq ($(MAN_COMPRESSION),bzip2)
+	MANPAGES := $(MANPAGES:.8=.8.bz2)
+endif
+
 ifndef DEBUG
 	CFLAGS	+= -O2 -g
 else
@@ -150,11 +176,17 @@ queuelat: $(OBJDIR)/queuelat.o $(OBJDIR)/librttest.a
 ssdd: $(OBJDIR)/ssdd.o $(OBJDIR)/librttest.a
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< $(LIBS) $(RTTESTLIB)
 
+%.8.gz: %.8
+	gzip -c $< > $@
+
+%.8.bz2: %.8
+	bzip2 -c $< > $@
+
 LIBOBJS =$(addprefix $(OBJDIR)/,error.o rt-get_cpu.o rt-sched.o rt-utils.o)
 $(OBJDIR)/librttest.a: $(LIBOBJS)
 	$(AR) rcs $@ $^
 
-CLEANUP  = $(TARGETS) *.o .depend *.*~ *.orig *.rej *.d *.a
+CLEANUP  = $(TARGETS) *.o .depend *.*~ *.orig *.rej *.d *.a *.8.gz *.8.bz2
 CLEANUP += $(if $(wildcard .git), ChangeLog)
 
 .PHONY: clean
@@ -175,36 +207,26 @@ rebuild:
 	$(MAKE) all
 
 .PHONY: install
-install: all install_hwlatdetect
-	mkdir -p "$(DESTDIR)$(bindir)" "$(DESTDIR)$(mandir)/man8"
+install: all install_manpages install_hwlatdetect
+	mkdir -p "$(DESTDIR)$(bindir)"
 	cp $(TARGETS) "$(DESTDIR)$(bindir)"
 	install src/queuelat/get_cpuinfo_mhz.sh "$(DESTDIR)$(bindir)"
 	install src/queuelat/determine_maximum_mpps.sh "${DESTDIR}${bindir}"
-	gzip -c src/cyclictest/cyclictest.8 >"$(DESTDIR)$(mandir)/man8/cyclictest.8.gz"
-	gzip -c src/pi_tests/pi_stress.8 >"$(DESTDIR)$(mandir)/man8/pi_stress.8.gz"
-	gzip -c src/ptsematest/ptsematest.8 >"$(DESTDIR)$(mandir)/man8/ptsematest.8.gz"
-	gzip -c src/rt-migrate-test/rt-migrate-test.8 >"$(DESTDIR)$(mandir)/man8/rt-migrate-test.8.gz"
-	gzip -c src/sigwaittest/sigwaittest.8 >"$(DESTDIR)$(mandir)/man8/sigwaittest.8.gz"
-	gzip -c src/svsematest/svsematest.8 >"$(DESTDIR)$(mandir)/man8/svsematest.8.gz"
-	gzip -c src/pmqtest/pmqtest.8 >"$(DESTDIR)$(mandir)/man8/pmqtest.8.gz"
-	gzip -c src/hackbench/hackbench.8 >"$(DESTDIR)$(mandir)/man8/hackbench.8.gz"
-	gzip -c src/signaltest/signaltest.8 >"$(DESTDIR)$(mandir)/man8/signaltest.8.gz"
-	gzip -c src/pi_tests/pip_stress.8 >"$(DESTDIR)$(mandir)/man8/pip_stress.8.gz"
-	gzip -c src/queuelat/queuelat.8 >"$(DESTDIR)$(mandir)/man8/queuelat.8.gz"
-	gzip -c src/sched_deadline/deadline_test.8 >"$(DESTDIR)$(mandir)/man8/deadline_test.8.gz"
-	gzip -c src/ssdd/ssdd.8 >"$(DESTDIR)$(mandir)/man8/ssdd.8.gz"
-	gzip -c src/sched_deadline/cyclicdeadline.8 >"$(DESTDIR)$(mandir)/man8/cyclicdeadline.8.gz"
 
 .PHONY: install_hwlatdetect
 install_hwlatdetect: hwlatdetect
 	if test -n "$(PYLIB)" ; then \
-		mkdir -p "$(DESTDIR)$(bindir)" "$(DESTDIR)$(mandir)/man8" ; \
+		mkdir -p "$(DESTDIR)$(bindir)" ; \
 		install -D -m 755 src/hwlatdetect/hwlatdetect.py $(DESTDIR)$(PYLIB)/hwlatdetect.py ; \
 		rm -f "$(DESTDIR)$(bindir)/hwlatdetect" ; \
 		ln -s $(PYLIB)/hwlatdetect.py "$(DESTDIR)$(bindir)/hwlatdetect" ; \
-		gzip -c src/hwlatdetect/hwlatdetect.8 >"$(DESTDIR)$(mandir)/man8/hwlatdetect.8.gz" ; \
 	fi
 
+.PHONY: install_manpages
+install_manpages: $(MANPAGES)
+	mkdir -p "$(DESTDIR)$(mandir)/man8"
+	cp $(MANPAGES) "$(DESTDIR)$(mandir)/man8"
+
 .PHONY: tarball
 tarball:
 	git archive --worktree-attributes --prefix=rt-tests-${VERSION}/ -o rt-tests-${VERSION}.tar v${VERSION}
-- 
2.20.1